Hey,
So I've been using the enet_io example to control some io of the Stellaris using the lm3s8962 eval board. I modified it in order to be able to use Uart send and receive but am running into trouble when the website attempts to send a toggle request externally over uart tx. Here's all the code ive modified:
//*****************************************************************************
//
// enet_io.c - I/O control via a web server.
//
// Copyright (c) 2007-2011 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 7243 of the EK-LM3S8962 Firmware Package.
//
//*****************************************************************************
#include <string.h>
#include <stdlib.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_nvic.h"
#include "inc/hw_types.h"
#include "driverlib/ethernet.h"
#include "driverlib/flash.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"
#include "driverlib/systick.h"
#include "utils/locator.h"
#include "utils/lwiplib.h"
#include "utils/uartstdio.h"
#include "utils/ustdlib.h"
#include "httpserver_raw/httpd.h"
#include "drivers/rit128x96x4.h"
#include "io.h"
#include "cgifuncs.h"
#include "driverlib/debug.h"
#include "driverlib/hibernate.h"
#include "driverlib/uart.h"
#include "inc/lm3s8962.h"
#include "inc/hw_pwm.h"
#include "driverlib/pwm.h"
void UART_Config();
//*****************************************************************************
//
//! \addtogroup example_list
//! <h1>Ethernet-based I/O Control (enet_io)</h1>
//!
//! This example application demonstrates web-based I/O control using the
//! Stellaris Ethernet controller and the lwIP TCP/IP Stack. DHCP is used to
//! obtain an Ethernet address. If DHCP times out without obtaining an
//! address, a static IP address will be chosen using AutoIP. The address that
//! is selected will be shown on the OLED display allowing you to access the
//! internal web pages served by the application via your normal web browser.
//!
//! Two different methods of controlling board peripherals via web pages are
//! illustrated via pages labelled "IO Control Demo 1" and "IO Control Demo 2"
//! in the navigation menu on the left of the application's home page.
//!
//! "IO Control Demo 1" uses JavaScript running in the web browser to send
//! HTTP requests for particular special URLs. These special URLs are
//! intercepted in the file system support layer (lmi_fs.c) and used to
//! control the LED and speaker PWM. Responses generated by the board are
//! returned to the browser and inserted into the page HTML dynamically by
//! more JavaScript code.
//!
//! "IO Control Demo 2" uses standard HTML forms to pass parameters to CGI
//! (Common Gateway Interface) handlers running on the board. These handlers
//! process the form data and control the PWM and LED as requested before
//! sending a response page (in this case, the original form) back to the
//! browser. The application registers the names and handlers for each of its
//! CGIs with the HTTPD server during initialization and the server calls
//! these handlers after parsing URL parameters each time one of the CGI URLs
//! is requested.
//!
//! Information on the state of the various controls in the second demo is
//! inserted into the served HTML using SSI (Server Side Include) tags which
//! are parsed by the HTTPD server in the application. As with the CGI
//! handlers, the application registers its list of SSI tags and a handler
//! function with the web server during initialization and this handler is
//! called whenever any registered tag is found in a .shtml, .ssi or .shtm
//! file being served to the browser.
//!
//! Note that the web server used by this example has been modified from the
//! example shipped with the basic lwIP package. Additions include SSI and
//! CGI support along with the ability to have the server automatically insert
//! the HTTP headers rather than having these built in to the files in the
//! file system image.
//!
//! For additional details on lwIP, refer to the lwIP web page at:
//! http://savannah.nongnu.org/projects/lwip/
//
//*****************************************************************************
//*****************************************************************************
//
// A set of flags. The flag bits are defined as follows:
//
// 0 -> An indicator that a SysTick interrupt has occurred.
//
//*****************************************************************************
#define FLAG_SYSTICK 0
static volatile unsigned long g_ulFlags;
//*****************************************************************************
//
// External Application references.
//
//*****************************************************************************
extern void httpd_init(void);
//*****************************************************************************
//
// SSI tag indices for each entry in the g_pcSSITags array.
//
//*****************************************************************************
#define SSI_INDEX_LEDSTATE 0
#define SSI_INDEX_PWMSTATE 1
#define SSI_INDEX_PWMFREQ 2
#define SSI_INDEX_PWMDUTY 3
#define SSI_INDEX_FORMVARS 4
//*****************************************************************************
//
// This array holds all the strings that are to be recognized as SSI tag
// names by the HTTPD server. The server will call SSIHandler to request a
// replacement string whenever the pattern <!--#tagname--> (where tagname
// appears in the following array) is found in ".ssi", ".shtml" or ".shtm"
// files that it serves.
//
//*****************************************************************************
static const char *g_pcConfigSSITags[] =
{
"LEDtxt", // SSI_INDEX_LEDSTATE
"PWMtxt", // SSI_INDEX_PWMSTATE
"PWMfreq", // SSI_INDEX_PWMFREQ
"PWMduty", // SSI_INDEX_PWMDUTY
"FormVars" // SSI_INDEX_FORMVARS
};
//*****************************************************************************
//
//! The number of individual SSI tags that the HTTPD server can expect to
//! find in our configuration pages.
//
//*****************************************************************************
#define NUM_CONFIG_SSI_TAGS (sizeof(g_pcConfigSSITags) / sizeof (char *))
//*****************************************************************************
//
//! Prototypes for the various CGI handler functions.
//
//*****************************************************************************
static char *ControlCGIHandler(int iIndex, int iNumParams, char *pcParam[],
char *pcValue[]);
static char *SetTextCGIHandler(int iIndex, int iNumParams, char *pcParam[],
char *pcValue[]);
//*****************************************************************************
//
//! Prototype for the main handler used to process server-side-includes for the
//! application's web-based configuration screens.
//
//*****************************************************************************
static int SSIHandler(int iIndex, char *pcInsert, int iInsertLen);
//*****************************************************************************
//
// CGI URI indices for each entry in the g_psConfigCGIURIs array.
//
//*****************************************************************************
#define CGI_INDEX_CONTROL 0
#define CGI_INDEX_TEXT 1
//*****************************************************************************
//
//! This array is passed to the HTTPD server to inform it of special URIs
//! that are treated as common gateway interface (CGI) scripts. Each URI name
//! is defined along with a pointer to the function which is to be called to
//! process it.
//
//*****************************************************************************
static const tCGI g_psConfigCGIURIs[] =
{
{ "/iocontrol.cgi", ControlCGIHandler }, // CGI_INDEX_CONTROL
{ "/settxt.cgi", SetTextCGIHandler } // CGI_INDEX_TEXT
};
//*****************************************************************************
//
//! The number of individual CGI URIs that are configured for this system.
//
//*****************************************************************************
#define NUM_CONFIG_CGI_URIS (sizeof(g_psConfigCGIURIs) / sizeof(tCGI))
//*****************************************************************************
//
//! The file sent back to the browser by default following completion of any
//! of our CGI handlers. Each individual handler returns the URI of the page
//! to load in response to it being called.
//
//*****************************************************************************
#define DEFAULT_CGI_RESPONSE "/io_cgi.ssi"
//*****************************************************************************
//
//! The file sent back to the browser in cases where a parameter error is
//! detected by one of the CGI handlers. This should only happen if someone
//! tries to access the CGI directly via the broswer command line and doesn't
//! enter all the required parameters alongside the URI.
//
//*****************************************************************************
#define PARAM_ERROR_RESPONSE "/perror.htm"
#define JAVASCRIPT_HEADER \
"<script type='text/javascript' language='JavaScript'><!--\n"
#define JAVASCRIPT_FOOTER \
"//--></script>\n"
//*****************************************************************************
//
// Timeout for DHCP address request (in seconds).
//
//*****************************************************************************
#ifndef DHCP_EXPIRE_TIMER_SECS
#define DHCP_EXPIRE_TIMER_SECS 45
#endif
//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, unsigned long ulLine)
{
}
#endif
//******************************************************************************
//
//UART_Config()
//
//This config function is built to set up all pin configurations, constants and
// other values the need to be pre-configured before using the functions run
// within.
//
//Inputs: None
//
//Return Values: None
//******************************************************************************
void
UART_Config()
{
//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_8MHZ);
//
// Enable the peripherals used by this example.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
//
// Set GPIO A0 and A1 as UART pins.
//
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
//
// Configure the UART for 9600, 8-N-1 operation.
//
UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), 9600,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
//
// Enable the UART interrupt.
//
IntEnable(INT_UART0);
UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT);
}
//*****************************************************************************
//
// The UART interrupt handler.
//
//*****************************************************************************
void
UARTIntHandler(void)
{
//
//Set default error value
//
char returnCharacter = MSG_ERROR;
unsigned long ulStatus;
//
// Get the interrrupt status.
//
ulStatus = UARTIntStatus(UART0_BASE, true);
//
// Clear the asserted interrupts.
//
UARTIntClear(UART0_BASE, ulStatus);
//
// Loop while there are characters in the receive FIFO.
//
while(UARTCharsAvail(UART0_BASE))
{
UART_Receive();
}
return;
}
//*****************************************************************************
//
// This CGI handler is called whenever the web browser requests iocontrol.cgi.
//
//*****************************************************************************
static char *
ControlCGIHandler(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
{
tBoolean bParamError;
long lLEDState, lPWMState, lPWMDutyCycle, lPWMFrequency;
//
// We have not encountered any parameter errors yet.
//
bParamError = false;
//
// Get each of the 4 expected parameters.
//
lLEDState = FindCGIParameter("LEDOn", pcParam, iNumParams);
lPWMState = FindCGIParameter("PWMOn", pcParam, iNumParams);
lPWMDutyCycle = GetCGIParam("PWMDutyCycle", pcParam, pcValue, iNumParams,
&bParamError);
lPWMFrequency = GetCGIParam("PWMFrequency", pcParam, pcValue, iNumParams,
&bParamError);
//
// Was there any error reported by the parameter parser?
//
if(bParamError || (lPWMDutyCycle < 0) || (lPWMDutyCycle > 100) ||
(lPWMFrequency < 200) || (lPWMFrequency > 20000))
{
return(PARAM_ERROR_RESPONSE);
}
//
// We got all the parameters and the values were within the expected ranges
// so go ahead and make the changes.
//
io_set_device(((lLEDState == -1) ? false : true), 'x'); //default all; add extra parameter pertaining to device being set as on/off
//
// Send back the default response page.
//
return(DEFAULT_CGI_RESPONSE);
}
//*****************************************************************************
//
// This CGI handler is called whenever the web browser requests settxt.cgi.
//
//*****************************************************************************
static char *
SetTextCGIHandler(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
{
long lStringParam;
char pcDecodedString[24];
//
// Find the parameter that has the string we need to display.
//
lStringParam = FindCGIParameter("DispText", pcParam, iNumParams);
//
// If the parameter was not found, show the error page.
//
if(lStringParam == -1)
{
return(PARAM_ERROR_RESPONSE);
}
//
// The parameter is present. We need to decode the text for display.
//
DecodeFormString(pcValue[lStringParam], pcDecodedString, 24);
//
// Claim the SSI for communication with the display.
//
RIT128x96x4Enable(1000000);
//
// Erase the previous string and overwrite it with the new one.
//
RIT128x96x4StringDraw(" ", 0, 64, 12);
RIT128x96x4StringDraw(pcDecodedString, 0, 64, 12);
//
// Release the SSI.
//
RIT128x96x4Disable();
//
// Tell the HTTPD server which file to send back to the client.
//
return(DEFAULT_CGI_RESPONSE);
}
//*****************************************************************************
//
// This function is called by the HTTP server whenever it encounters an SSI
// tag in a web page. The iIndex parameter provides the index of the tag in
// the g_pcConfigSSITags array. This function writes the substitution text
// into the pcInsert array, writing no more than iInsertLen characters.
//
//*****************************************************************************
static int
SSIHandler(int iIndex, char *pcInsert, int iInsertLen)
{
unsigned long ulVal;
//
// Which SSI tag have we been passed?
//
switch(iIndex)
{
case SSI_INDEX_LEDSTATE:
io_get_ledstate(pcInsert, iInsertLen, 'x', 100000); //not using SSI so this doesn't really matter; get state based on device; add extra parameter
break;
case SSI_INDEX_PWMSTATE:
io_get_pwmstate(pcInsert, iInsertLen);
break;
case SSI_INDEX_PWMFREQ:
ulVal = io_get_pwmfreq();
usnprintf(pcInsert, iInsertLen, "%d", ulVal);
break;
case SSI_INDEX_PWMDUTY:
ulVal = io_get_pwmdutycycle();
usnprintf(pcInsert, iInsertLen, "%d", ulVal);
break;
case SSI_INDEX_FORMVARS:
usnprintf(pcInsert, iInsertLen,
"%sps=%d;\nls=%d;\npf=%d;\npd=%d;\n%s",
JAVASCRIPT_HEADER,
io_is_pwm_on(),
io_is_led_on('a', 100000),
io_get_pwmfreq(),
io_get_pwmdutycycle(),
JAVASCRIPT_FOOTER);
break;
default:
usnprintf(pcInsert, iInsertLen, "??");
break;
}
//
// Tell the server how many characters our insert string contains.
//
return(strlen(pcInsert));
}
//*****************************************************************************
//
// Display an lwIP type IP Address.
//
//*****************************************************************************
void
DisplayIPAddress(unsigned long ipaddr, unsigned long ulCol,
unsigned long ulRow)
{
char pucBuf[16];
unsigned char *pucTemp = (unsigned char *)&ipaddr;
//
// Convert the IP Address into a string.
//
usprintf(pucBuf, "%d.%d.%d.%d", pucTemp[0], pucTemp[1], pucTemp[2],
pucTemp[3]);
//
// Display the string.
//
RIT128x96x4StringDraw(pucBuf, ulCol, ulRow, 15);
}
//*****************************************************************************
//
// The interrupt handler for the SysTick interrupt.
//
//*****************************************************************************
void
SysTickIntHandler(void)
{
//
// Indicate that a SysTick interrupt has occurred.
//
HWREGBITW(&g_ulFlags, FLAG_SYSTICK) = 1;
//
// Call the lwIP timer handler.
//
lwIPTimer(SYSTICKMS);
}
//*****************************************************************************
//
// Required by lwIP library to support any host-related timer functions.
//
//*****************************************************************************
void
lwIPHostTimerHandler(void)
{
static unsigned long ulLastIPAddress = 0;
unsigned long ulIPAddress;
ulIPAddress = lwIPLocalIPAddrGet();
//
// If IP Address has not yet been assigned, update the display accordingly
//
if(ulIPAddress == 0)
{
static int iColumn = 6;
//
// Update status bar on the display.
//
RIT128x96x4Enable(1000000);
if(iColumn < 12)
{
RIT128x96x4StringDraw(" >", 114, 24, 15);
RIT128x96x4StringDraw("< ", 0, 24, 15);
RIT128x96x4StringDraw("*",iColumn, 24, 7);
}
else
{
RIT128x96x4StringDraw(" *",iColumn - 6, 24, 7);
}
iColumn += 4;
if(iColumn > 114)
{
iColumn = 6;
RIT128x96x4StringDraw(" >", 114, 24, 15);
}
RIT128x96x4Disable();
}
//
// Check if IP address has changed, and display if it has.
//
else if(ulLastIPAddress != ulIPAddress)
{
ulLastIPAddress = ulIPAddress;
RIT128x96x4Enable(1000000);
RIT128x96x4StringDraw(" ", 0, 16, 15);
RIT128x96x4StringDraw(" ", 0, 24, 15);
RIT128x96x4StringDraw("IP: ", 0, 16, 15);
RIT128x96x4StringDraw("MASK: ", 0, 24, 15);
RIT128x96x4StringDraw("GW: ", 0, 32, 15);
DisplayIPAddress(ulIPAddress, 36, 16);
ulIPAddress = lwIPLocalNetMaskGet();
DisplayIPAddress(ulIPAddress, 36, 24);
ulIPAddress = lwIPLocalGWAddrGet();
DisplayIPAddress(ulIPAddress, 36, 32);
RIT128x96x4Disable();
}
}
//*****************************************************************************
//
// This example demonstrates the use of the Ethernet Controller and lwIP
// TCP/IP stack to control various peripherals on the board via a web
// browser.
//
//*****************************************************************************
int
main(void)
{
unsigned long ulUser0, ulUser1;
unsigned char pucMACArray[8];
//
// Initialize the OLED display.
//
RIT128x96x4Init(1000000);
RIT128x96x4StringDraw("Web-Based I/O Control", 0, 0, 15);
RIT128x96x4StringDraw("Browser Message:", 0, 53, 15);
//
// Enable and Reset the Ethernet Controller.
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_ETH);
SysCtlPeripheralReset(SYSCTL_PERIPH_ETH);
//
// Enable Port F for Ethernet LEDs.
// LED0 Bit 3 Output
// LED1 Bit 2 Output
//
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_2 | GPIO_PIN_3);
//
// Configure SysTick for a periodic interrupt.
//
SysTickPeriodSet(SysCtlClockGet() / SYSTICKHZ);
SysTickEnable();
SysTickIntEnable();
//
// Configure the hardware MAC address for Ethernet Controller filtering of
// incoming packets.
//
// For the LM3S6965 Evaluation Kit, the MAC address will be stored in the
// non-volatile USER0 and USER1 registers. These registers can be read
// using the FlashUserGet function, as illustrated below.
//
FlashUserGet(&ulUser0, &ulUser1);
if((ulUser0 == 0xffffffff) || (ulUser1 == 0xffffffff))
{
//
// We should never get here. This is an error if the MAC address
// has not been programmed into the device. Exit the program.
//
RIT128x96x4StringDraw("MAC Address", 0, 16, 15);
RIT128x96x4StringDraw("Not Programmed!", 0, 24, 15);
while(1);
}
//
// Convert the 24/24 split MAC address from NV ram into a 32/16 split
// MAC address needed to program the hardware registers, then program
// the MAC address into the Ethernet Controller registers.
//
pucMACArray[0] = ((ulUser0 >> 0) & 0xff);
pucMACArray[1] = ((ulUser0 >> 8) & 0xff);
pucMACArray[2] = ((ulUser0 >> 16) & 0xff);
pucMACArray[3] = ((ulUser1 >> 0) & 0xff);
pucMACArray[4] = ((ulUser1 >> 8) & 0xff);
pucMACArray[5] = ((ulUser1 >> 16) & 0xff);
//
// Initialze the lwIP library, using DHCP.
//
lwIPInit(pucMACArray, 0, 0, 0, IPADDR_USE_DHCP);
//
// Setup the device locator service.
//
LocatorInit();
LocatorMACAddrSet(pucMACArray);
LocatorAppTitleSet("EK-LM3S8962 enet_io");
//
// Initialize a sample httpd server.
//
httpd_init();
//
// Pass our CGI handlers to the HTTP server.
//
http_set_cgi_handlers(g_psConfigCGIURIs, NUM_CONFIG_CGI_URIS);
initializeMemory();
//
// Loop forever. All the work is done in interrupt handlers.
//
//Set initial configurations
//
UART_Config();
//
while(1)
{
}
}
//*****************************************************************************
//
// io.c - I/O routines for the enet_io example application.
//
// Copyright (c) 2007-2011 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 7243 of the EK-LM3S8962 Firmware Package.
//
//*****************************************************************************
#include <string.h>
#include <stdlib.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_nvic.h"
#include "inc/hw_types.h"
#include "driverlib/ethernet.h"
#include "driverlib/flash.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"
#include "driverlib/systick.h"
#include "utils/locator.h"
#include "utils/lwiplib.h"
#include "utils/uartstdio.h"
#include "utils/ustdlib.h"
#include "httpserver_raw/httpd.h"
#include "drivers/rit128x96x4.h"
#include "driverlib/debug.h"
#include "driverlib/hibernate.h"
#include "driverlib/uart.h"
#include "inc/lm3s8962.h"
#include "inc/hw_pwm.h"
#include "driverlib/pwm.h"
#include "io.h"
int MEM_START[TOTAL_DEVICES];
//*****************************************************************************
//
// Default all mem locations to -1
//
//*****************************************************************************
void initializeMemory()
{
int i;
for(i = 0; i < TOTAL_DEVICES; i++)
{
if(i == 5)
{
MEM_START[i] = 0;
}
else
MEM_START[i] = -1;
}
}
int memHash(char key)
{
int m1 = 0, m2 = 0, m4 = 0;
char h1, h2, h4;
h1 = (key & HASH_MASK_1) >> 1;
if((h1&0x01) == 0x01)
{
m1 = 1;
}
if((h1&0x02) == 0x02)
{
m1 += 2;
}
h2 = (key & HASH_MASK_2) >> 3;
if((h2&0x01) == 0x01)
{
m2 = 1;
}
h4 = (key & HASH_MASK_4) >> 4;
if((h4&0x01) == 0x01)
{
m4 = 1;
}
if((h4&0x02) == 0x02)
{
m4 += 2;
}
return (m1 + m2*2 + m4*4);
}
//*****************************************************************************
//
// LEDON used to flash a status LED on and off for debugging purposes
//
//*****************************************************************************
void
LEDON()
{
volatile unsigned long ulLoop;
//
// Enable the GPIO port that is used for the on-board LED.
//
SYSCTL_RCGC2_R = SYSCTL_RCGC2_GPIOF;
//
// Do a dummy read to insert a few cycles after enabling the peripheral.
//
ulLoop = SYSCTL_RCGC2_R;
//
// Enable the GPIO pin for the LED (PF0). Set the direction as output, and
// enable the GPIO pin for digital function.
//
GPIO_PORTF_DIR_R = 0x01;
GPIO_PORTF_DEN_R = 0x01;
//
// Turn on the LED.
//
GPIO_PORTF_DATA_R |= 0x01;
//
// Delay for a bit.
//
SysCtlDelay(800000);
//
// Turn off the LED.
//
GPIO_PORTF_DATA_R &= ~(0x01);
}
//******************************************************************************
//
//UART_Send()
//
//This send function takes in a char (2 hex bits) and outputs it to the FIFO
// to be output via the RF module; Waits for Received value to confirm successful send
//
//Inputs: char dataOut - data to be sent out to corresponding address
//
//Return Values: none
//
//******************************************************************************
void
UART_Send(char dataOut, int timeout)
{
int x = 1000;
char ack, addr, addr2, valid;
//Send out character automatically
UARTCharPutNonBlocking(UART0_BASE, dataOut);
//Flash LED for debugging purposes
LEDON();
SysCtlDelay(400000);
LEDON();
if(dataOut & 0x0F != 0x0F)
{
ack = UART_Receive();
addr = ack & 0xF0;
addr2 = dataOut & 0xF0;
valid = ack & 0x0F;
//Try to send at changing intervals until defined timeout occurs
while(addr != addr2 || valid != 0x0F || addr2 != 0x0F || timeout < TIMEOUT)
{
UART_Send(dataOut, timeout++);
SysCtlDelay(x*timeout);
}
}
}
//******************************************************************************
//
//UART_Receive()
//
//This receive function takes in no value; It is called when the FIFO buffer is
// full, meaning data has been sent in and therefore the data needs to be read
// in
//
//Inputs: none
//
//Return Values: char value that is the dataIn value returned from the function
//
//******************************************************************************
char
UART_Receive()
{
char receiveCharacter, valid;
//
//Return character that's in the FIFO Buffer
//
receiveCharacter = (char)UARTCharGetNonBlocking(UART0_BASE);
LEDON();
valid = receiveCharacter & 0x0F;
if(valid != 0x0F && receiveCharacter != 255)
{
UART_Store(receiveCharacter);
}
UART_Send(receiveCharacter || 0x1F, 1);
return receiveCharacter;
}
//******************************************************************************
//
//UART_Store()
//
//This store function takes in the latest status as sent by one of the MSP430
// devices and stores that status within the corresponding status register
//
//Inputs: char dataIn - value containing both address of device and latest
// configuration of said device
//
//Return Values: none
//
//******************************************************************************
void
UART_Store(char data)
{
int index = memHash(data);
data&= DEV_STATUS_MASK;
MEM_START[index] = (int)data;
}
//******************************************************************************
//
//UART_Retrieve()
//
//This store function retrieves the latest status when requested and returns
// that status as requested in the form of a char value
//
//Inputs: char address - address used to move to correct place in register
// in order to locate status of device at said address
//
//Return Values: char value which is the address passed in with the status
//appended to it
//
//******************************************************************************
int
UART_Retrieve(char address)
{
int index;
index = memHash(address);
return MEM_START[index];
}
//*****************************************************************************
//
// Set the status LED on or off.
//
//*****************************************************************************
void
io_set_device(int isOn, char data)
{
//Send out status to device as requested by parameter passed in
if(isOn == 1)
{
data |= DEV_STATUS_MASK;
}
else
{
data |= ~(DEV_STATUS_MASK);
}
UART_Send(data, 1);
//Store new configuration
UART_Store(data);
}
//*****************************************************************************
//
// Return LED state
//
//*****************************************************************************
void
io_get_devstate(char * pcBuf, int iBufLen, char location, int delayTime)
{
//
// Get the state of the LED
//
if(UART_Retrieve(location) == 1)
{
//usnprintf(pcBuf, iBufLen, "ON");
}
else if(UART_Retrieve(location) == 0)
{
//usnprintf(pcBuf, iBufLen, "OFF");
}
//Device status unknown
else if(delayTime > MAX_DELAY)
{
return;
}
else
{
//Send out for status; In doing so, write new status to mem location; Now, recursively call io_is_led_on again
location |= REQUEST_MASK;
UART_Send(location, 1);
SysCtlDelay(delayTime);
io_get_devstate(pcBuf, iBufLen, location, delayTime*10);
}
}
//*****************************************************************************
//
// Return LED state as an integer, 1 on, 0 off.
//
//*****************************************************************************
int
io_is_dev_on(char locChar, int delayTime)
{
//
// Get the state of the LED
//
if(UART_Retrieve(locChar) == 1)
{
return(1);
}
else if(UART_Retrieve(locChar) == 0)
{
return(0);
}
//Device Status unknown
else if(delayTime > MAX_DELAY)
{
return (-1);
}
else
{
//Send out for status; In doing so, write new status to mem location; Now, recursively call io_is_led_on again
locChar |= REQUEST_MASK;
UART_Send(locChar, 1);
SysCtlDelay(delayTime);
return io_is_dev_on(locChar, delayTime*10);
}
}
//*****************************************************************************
//
// lmi_fs.c - File System Processing for enet_io application.
//
// Copyright (c) 2007-2011 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 7243 of the EK-LM3S8962 Firmware Package.
//
//*****************************************************************************
#include <string.h>
#include "inc/hw_types.h"
#include "utils/lwiplib.h"
#include "utils/ustdlib.h"
#include "httpserver_raw/fs.h"
#include "httpserver_raw/fsdata.h"
#include "io.h"
//*****************************************************************************
//
// Include the file system data for this application. This file is generated
// by the makefsfile utility, using the following command (all on one line):
//
// makefsfile -i fs -o io_fsdata.h -r -h
//
// If any changes are made to the static content of the web pages served by the
// application, this script must be used to regenerate io_fsdata.h in order
// for those changes to be picked up by the web server.
//
//*****************************************************************************
#include "io_fsdata.h"
//*****************************************************************************
//
// Global Settings for demo page content.
//
//*****************************************************************************
static char g_cSampleTextBuffer[16] = {0};
//*****************************************************************************
//
// Open a file and return a handle to the file, if found. Otherwise,
// return NULL. This function also looks for special filenames used to
// provide specific status information or to control various subsystems.
// These filenames are used by the JavaScript on the "IO Control Demo 1"
// example web page.
//
//*****************************************************************************
struct fs_file *
fs_open(char *name)
{
const struct fsdata_file *ptTree;
struct fs_file *ptFile = NULL;
//
// Allocate memory for the file system structure.
//
ptFile = mem_malloc(sizeof(struct fs_file));
if(NULL == ptFile)
{
return(NULL);
}
//
// Process request to toggle STATUS LED
//
if(strncmp(name, "/cgi-bin/toggle_led", 19) == 0)
{
//
// Toggle the STATUS LED
//
io_set_device(!io_is_dev_on((name[24] - 0x30), 10), (name[26] - 0x30));
//
// Setup the file structure to return whatever.
//
ptFile->data = NULL;
ptFile->len = 0;
ptFile->index = 0;
ptFile->pextension = NULL;
//
// Return the file system pointer.
//
return(ptFile);
}
//
// Request for LED State?
//
if(strncmp(name, "/ledstate?", 9) == 0)
{
static char pcBuf[4];
//
// Get the state of the LED
//
io_get_devstate(pcBuf, 4, (name[14] - 0x30), 10);
ptFile->data = pcBuf;
ptFile->len = strlen(pcBuf);
ptFile->index = ptFile->len;
ptFile->pextension = NULL;
return(ptFile);
}
//
// If I can't find it there, look in the rest of the main file system
//
else
{
//
// Initialize the file system tree pointer to the root of the linked list.
//
ptTree = FS_ROOT;
//
// Begin processing the linked list, looking for the requested file name.
//
while(NULL != ptTree)
{
//
// Compare the requested file "name" to the file name in the
// current node.
//
if(strncmp(name, (char *)ptTree->name, ptTree->len) == 0)
{
//
// Fill in the data pointer and length values from the
// linked list node.
//
ptFile->data = (char *)ptTree->data;
ptFile->len = ptTree->len;
//
// For now, we setup the read index to the end of the file,
// indicating that all data has been read.
//
ptFile->index = ptTree->len;
//
// We are not using any file system extensions in this
// application, so set the pointer to NULL.
//
ptFile->pextension = NULL;
//
// Exit the loop and return the file system pointer.
//
break;
}
//
// If we get here, we did not find the file at this node of the linked
// list. Get the next element in the list.
//
ptTree = ptTree->next;
}
}
//
// If we didn't find the file, ptTee will be NULL. Make sure we
// return a NULL pointer if this happens.
//
if(NULL == ptTree)
{
mem_free(ptFile);
ptFile = NULL;
}
//
// Return the file system pointer.
//
return(ptFile);
}
//*****************************************************************************
//
// Close an opened file designated by the handle.
//
//*****************************************************************************
void
fs_close(struct fs_file *file)
{
//
// Free the main file system object.
//
mem_free(file);
}
//*****************************************************************************
//
// Read the next chunck of data from the file. Return the count of data
// that was read. Return 0 if no data is currently available. Return
// a -1 if at the end of file.
//
//*****************************************************************************
int
fs_read(struct fs_file *file, char *buffer, int count)
{
int iAvailable;
//
// Check to see if a command (pextension = 1).
//
if(file->pextension == (void *)1)
{
//
// Nothting to do for this file type.
//
file->pextension = NULL;
return(-1);
}
//
// Check to see if more data is available.
//
if(file->len == file->index)
{
//
// There is no remaining data. Return a -1 for EOF indication.
//
return(-1);
}
//
// Determine how much data we can copy. The minimum of the 'count'
// parameter or the available data in the file system buffer.
//
iAvailable = file->len - file->index;
if(iAvailable > count)
{
iAvailable = count;
}
//
// Copy the data.
//
memcpy(buffer, file->data + iAvailable, iAvailable);
file->index += iAvailable;
//
// Return the count of data that we copied.
//
return(iAvailable);
}
and the GUI:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head>
<!-- Copyright (c) 2009-2011 Texas Instruments Incorporated. All rights reserved. -->
<meta http-equiv="content-type" content="text/html;charset=ISO-8869-1"><title>I/O Control Demo 1</title>
<script language="JavaScript">
<!--
function toggle_led()
{
var req = false;
var led = false;
function ledComplete()
{
if (led.readyState == 4 && led.status == 200)
{
document.getElementById("ledstate").innerHTML = "<div>" + led.responseText + "</div>";
}
}
if(window.XMLHttpRequest)
{
req = new XMLHttpRequest();
led = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
led = new ActiveXObject("Microsoft.XMLHTTP");
}
if (req)
{
req.open("GET", "/cgi-bin/toggle_led?loc=B&id" + Math.random(), true);
req.send(null);
}
if(led)
{
led.open("GET", "/ledstate?loc=Bid=" + Math.random(), true);
led.onreadystatechange = ledComplete;
led.send(null);
}
}
function pwm_onoff()
{
var req = false;
var pwm = false;
function pwmComplete()
{
if(pwm.readyState == 4)
{
if(pwm.status == 200)
{
document.getElementById("pwmstate").innerHTML = "<div>" + pwm.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
req = new XMLHttpRequest();
pwm = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
pwm = new ActiveXObject("Microsoft.XMLHTTP");
}
if(req)
{
req.open("GET", "/cgi-bin/pwm_onoff?id" + Math.random(), true);
req.send(null);
}
if(pwm)
{
pwm.open("GET", "/pwmstate?id=" + Math.random(), true);
pwm.onreadystatechange = pwmComplete;
pwm.send(null);
}
}
function pwm_freq_set()
{
var req = false;
var pwmfreq = false;
var FreqText = document.getElementById("pwmfreqtxt");
function pwmfreqComplete()
{
if(pwmfreq.readyState == 4)
{
if(pwmfreq.status == 200)
{
document.getElementById("pwmfreq").innerHTML = "<div>" + pwmfreq.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
req = new XMLHttpRequest();
pwmfreq = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
pwmfreq = new ActiveXObject("Microsoft.XMLHTTP");
}
if(req)
{
if(FreqText.value != "")
{
req.open("GET", "/pwm_freq?value=" + FreqText.value + "&id=" + Math.random(), true);
req.send(null);
}
}
if(pwmfreq)
{
pwmfreq.open("GET", "/pwmfreqget?id=" + Math.random(), true);
pwmfreq.onreadystatechange = pwmfreqComplete;
pwmfreq.send(null);
}
}
function pwm_dutycycle_set()
{
var req = false;
var pwmdutycycle = false;
var DutyCycleText = document.getElementById("pwmdutycycletxt");
function pwmdutycycleComplete()
{
if(pwmdutycycle.readyState == 4)
{
if(pwmdutycycle.status == 200)
{
document.getElementById("pwmdutycycle").innerHTML = "<div>" + pwmdutycycle.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
req = new XMLHttpRequest();
pwmdutycycle = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
req = new ActiveXObject("Microsoft.XMLHTTP");
pwmdutycycle = new ActiveXObject("Microsoft.XMLHTTP");
}
if(req)
{
if(DutyCycleText.value != "")
{
req.open("GET", "/pwm_dutycycle?value=" + DutyCycleText.value + "&id=" + Math.random(), true);
req.send(null);
}
}
if(pwmdutycycle)
{
pwmdutycycle.open("GET", "/pwmdutycycleget?id=" + Math.random(), true);
pwmdutycycle.onreadystatechange = pwmdutycycleComplete;
pwmdutycycle.send(null);
}
}
function ledstateGet()
{
var led = false;
function ledComplete()
{
if(led.readyState == 4)
{
if(led.status == 200)
{
document.getElementById("ledstate").innerHTML = "<div>" + led.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
led = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
led = new ActiveXObject("Microsoft.XMLHTTP");
}
if(led)
{
led.open("GET", "/ledstate?id=" + Math.random(), true);
led.onreadystatechange = ledComplete;
led.send(null);
}
}
function pwmstateGet()
{
var pwm = false;
function pwmComplete()
{
if(pwm.readyState == 4)
{
if(pwm.status == 200)
{
document.getElementById("pwmstate").innerHTML = "<div>" + pwm.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
pwm = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
pwm = new ActiveXObject("Microsoft.XMLHTTP");
}
if(pwm)
{
pwm.open("GET", "/pwmstate?id=" + Math.random(), true);
pwm.onreadystatechange = pwmComplete;
pwm.send(null);
}
}
function pwmfreqGet()
{
var pwmfreq = false;
function pwmfreqComplete()
{
if(pwmfreq.readyState == 4)
{
if(pwmfreq.status == 200)
{
document.getElementById("pwmfreq").innerHTML = "<div>" + pwmfreq.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
pwmfreq = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
pwmfreq = new ActiveXObject("Microsoft.XMLHTTP");
}
if(pwmfreq)
{
pwmfreq.open("GET", "/pwmfreqget?id=" + Math.random(), true);
pwmfreq.onreadystatechange = pwmfreqComplete;
pwmfreq.send(null);
}
}
function pwmdutycycleGet()
{
var pwmdutycycle = false;
function pwmdutycycleComplete()
{
if(pwmdutycycle.readyState == 4)
{
if(pwmdutycycle.status == 200)
{
document.getElementById("pwmdutycycle").innerHTML = "<div>" + pwmdutycycle.responseText + "</div>";
}
}
}
if(window.XMLHttpRequest)
{
pwmdutycycle = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
pwmdutycycle = new ActiveXObject("Microsoft.XMLHTTP");
}
if(pwmdutycycle)
{
pwmdutycycle.open("GET", "/pwmdutycycleget?id=" + Math.random(), true);
pwmdutycycle.onreadystatechange = pwmdutycycleComplete;
pwmdutycycle.send(null);
}
}
//-->
</script>
<style type="text/css">
body
{
font-family: Arial;
background-color: white;
margin: 10px;
padding: 0px
}
h1
{
color: #7C7369;
font-family: Arial;
font-size: 24pt;
font-style: italic;
}
h2
{
color: #000000;
font-family: Arial;
font-size: 18pt;
font-style: bold;
}
h3
{
color: #7C7369;
font-family: Arial;
font-size: 12pt;
font-style: bold;
}
</style>
</head>
<body onload="ledstateGet();pwmstateGet();pwmfreqGet();pwmdutycycleGet();"
background="images/circle%20spiral%201600x12802.png">
<!--
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" valign="center">
<img src="./images/ti_logo.gif">
</td>
<td align="center" valign="center">
<h1>Stellaris<small><sup>®</sup></small> LM3S8962 Evaluation Kit</h1>
</td>
</tr>
</table>
<table width="100%">
<tbody>
<tr>
<td align="left" valign="top" width="25%">
<br>
<ul>
<li> <a href="index.htm">About TI</a>
<br>
<br>
</li>
<li> <a href="family.htm">About the Stellaris Family</a>
<br>
<br>
</li>
<li> <a href="block.htm">Block Diagram</a>
<br>
<br>
</li>
<li> <a href="io_http.htm">I/O Control Demo 1<br>
(HTTP Requests)</a>
<br>
<br>
</li>
<li><a href="io_cgi.ssi">I/O Control Demo 2<br>
(SSI/CGI)<br>
<br>
</a></li>
</ul>
</td>
<td align="left" valign="top" width="75%">
-->
<center>
<h1 align="center" id="NameHeader1"><font color="gray">Smart Home Control Panel</font></h1>
</center>
<h2 align="left"><font color="gray">Light Controls</font></h2>
</center>
<table width="50%" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td><font color="gray">Room #</font></td>
<td><font color="gray">Light Status</font></td>
<td
align="center"> <font color="gray">Controls</font></td>
</tr>
<tr></tr>
<tr>
<td><font color="gray">1</font></td>
<td>
<div id="ledstate" align="center"><font color="gray"> - </font></div>
</td>
<td><input id="toggle" value="Turn Light On" onclick="toggle_led()" type="button"></td>
<td><input id="toggle1" value="Turn Light Off" onclick="toggle_led()" type="button"></td>
</tr>
<tr>
<td><font color="gray">2</font></td>
<td>
<div id="ledstate" align="center"><font color="gray"> - </font></div>
</td>
<td><input id="toggle" value="Turn Light On" onclick="toggle_led()" type="button"></td>
<td><input id="toggle1" value="Turn Light Off" onclick="toggle_led()" type="button"></td>
</tr>
</tbody>
</table>
<br>
<h2 align="left"><font color="gray">Electronics Controls</font></h2>
</center>
<table width="50%" border="0" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td><font color="gray">Room #</font></td>
<td><font color="gray">Outlet Status</font></td>
<td
align="center"> <font color="gray">Controls</font></td>
</tr>
<tr></tr>
<tr>
<td><font color="gray">1 Outlet A</font></td>
<td>
<div id="ledstate" align="center"><font color="gray"> - </font></div>
</td>
<td><input id="toggle" value="Turn Outlet On" onclick="toggle_led()" type="button"></td>
<td><input id="toggle1" value="Turn Outlet Off" onclick="toggle_led()" type="button"></td>
</tr>
<tr>
<td><font color="gray">1 Outlet B</font></td>
<td>
<div id="ledstate" align="center"><font color="gray"> - </font></div>
</td>
<td><input id="toggle" value="Turn Outlet On" onclick="toggle_led()" type="button"></td>
<td><input id="toggle1" value="Turn Outlet Off" onclick="toggle_led()" type="button"></td>
</tr>
<tr>
<td><font color="gray">2 Outlet A</font></td>
<td>
<div id="ledstate" align="center"><font color="gray"> - </font></div>
</td>
<td><input id="toggle" value="Turn Outlet On" onclick="toggle_led()" type="button"></td>
<td><input id="toggle1" value="Turn Outlet Off" onclick="toggle_led()" type="button"></td>
</tr>
<tr>
<td><font color="gray">2 Outlet B</font></td>
<td>
<div id="ledstate" align="center"><font color="gray"> - </font></div>
</td>
<td><input id="toggle" value="Turn Outlet On" onclick="toggle_led()" type="button"></td>
<td><input id="toggle1" value="Turn Outlet Off" onclick="toggle_led()" type="button"></td>
</tr>
</tbody>
</table>
<br>
</tr>
</tbody>
</table>
<!--
<p>
Toggle PWM ON/OFF and report the current state
</p>
<table>
<tbody>
<tr>
<td><input id="pwmonoff" value="PWM ON/OFF" onclick="pwm_onoff()" type="button"></td>
<td>PWM:</td>
<td>
<div id="pwmstate" align="center"> - </div>
</td>
</tr>
</tbody>
</table>
<p>
Set PWM frequency (min 200)
</p>
<table>
<tbody>
<tr>
<td>Current Freq:</td>
<td>
<div id="pwmfreq" align="center"> - </div>
</td>
</tr>
<tr>
<td><input id="pwmfreqset" value="Set Frequency" onclick="pwm_freq_set()" type="button"></td>
<td><input id="pwmfreqtxt" type="text"></td>
</tr>
</tbody>
</table>
<p>
Set PWM Duty Cycle
</p>
<table>
<tbody>
<tr>
<td>Current Duty Cycle:</td>
<td>
<div id="pwmdutycycle" align="center">-
</div>
</td>
</tr>
<tr>
<td><input id="pwmdutycycleset" value="Set Duty Cycle" onclick="pwm_dutycycle_set()" type="button"></td>
<td><input id="pwmdutycycletxt" type="text"></td>
</tr>
</tbody>
</table>
<p></p>
</td>
</tr>
</tbody>
</table>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tbody>
<tr>
<td align="right" valign="center">
<h1><br>
</h1>
</td>
<td align="right" valign="center">
<h3>Copyright © 2009-2011 Texas Instruments Incorporated. All rights reserved.</h3>
</td>
</tr>
</tbody>
</table>
-->
</body></html>
Here is when i'm thrown into the Fault ISR:
/**
* @file - stellarisif.c
* lwIP Ethernet interface for Stellaris Devices
*
*/
/**
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <adam@sics.se>
*
*/
/**
* Copyright (c) 2008 Texas Instruments Incorporated
*
* This file is dervied from the ``ethernetif.c'' skeleton Ethernet network
* interface driver for lwIP.
*
*/
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include <lwip/stats.h>
#include <lwip/snmp.h>
#include "netif/etharp.h"
#include "netif/ppp_oe.h"
#include "netif/stellarisif.h"
/**
* Sanity Check: This interface driver will NOT work if the following defines
* are incorrect.
*
*/
#if (PBUF_LINK_HLEN != 16)
#error "PBUF_LINK_HLEN must be 16 for this interface driver!"
#endif
#if (ETH_PAD_SIZE != 2)
#error "ETH_PAD_SIZE must be 2 for this interface driver!"
#endif
#if (!SYS_LIGHTWEIGHT_PROT)
#error "SYS_LIGHTWEIGHT_PROT must be enabled for this interface driver!"
#endif
/**
* Number of pbufs supported in low-level tx/rx pbuf queue.
*
*/
#ifndef STELLARIS_NUM_PBUF_QUEUE
#define STELLARIS_NUM_PBUF_QUEUE 20
#endif
/**
* Setup processing for PTP (IEEE-1588).
*
*/
#if LWIP_PTPD
extern void lwIPHostGetTime(u32_t *time_s, u32_t *time_ns);
#endif
/**
* Stellaris DriverLib Header Files required for this interface driver.
*
*/
#include "inc/hw_ethernet.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/ethernet.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"
/* Define those to better describe your network interface. */
#define IFNAME0 'l'
#define IFNAME1 'm'
/* Helper struct to hold a queue of pbufs for transmit and receive. */
struct pbufq {
struct pbuf *pbuf[STELLARIS_NUM_PBUF_QUEUE];
unsigned long qwrite;
unsigned long qread;
unsigned long overflow;
};
/* Helper macros for accessing pbuf queues. */
#define PBUF_QUEUE_EMPTY(q) \
(((q)->qwrite == (q)->qread) ? true : false)
#define PBUF_QUEUE_FULL(q) \
((((((q)->qwrite + 1) % STELLARIS_NUM_PBUF_QUEUE)) == (q)->qread) ? \
true : false )
/**
* Helper struct to hold private data used to operate your ethernet interface.
* Keeping the ethernet address of the MAC in this struct is not necessary
* as it is already kept in the struct netif.
* But this is only an example, anyway...
*/
struct stellarisif {
struct eth_addr *ethaddr;
/* Add whatever per-interface state that is needed here. */
struct pbufq txq;
};
/**
* Global variable for this interface's private data. Needed to allow
* the interrupt handlers access to this information outside of the
* context of the lwIP netif.
*
*/
static struct stellarisif stellarisif_data;
/**
* Pop a pbuf packet from a pbuf packet queue
*
* @param q is the packet queue from which to pop the pbuf.
*
* @return pointer to pbuf packet if available, NULL otherswise.
*/
static struct pbuf *
dequeue_packet(struct pbufq *q)
{
struct pbuf *pBuf;
SYS_ARCH_DECL_PROTECT(lev);
/**
* This entire function must run within a "critical section" to preserve
* the integrity of the transmit pbuf queue.
*
*/
SYS_ARCH_PROTECT(lev);
if(PBUF_QUEUE_EMPTY(q)) {
/* Return a NULL pointer if the queue is empty. */
pBuf = (struct pbuf *)NULL;
}
else {
/**
* The queue is not empty so return the next frame from it
* and adjust the read pointer accordingly.
*
*/
pBuf = q->pbuf[q->qread];
q->qread = ((q->qread + 1) % STELLARIS_NUM_PBUF_QUEUE);
}
/* Return to prior interrupt state and return the pbuf pointer. */
SYS_ARCH_UNPROTECT(lev);
return(pBuf);
}
/**
* Push a pbuf packet onto a pbuf packet queue
*
* @param p is the pbuf to push onto the packet queue.
* @param q is the packet queue.
*
* @return 1 if successful, 0 if q is full.
*/
static int
enqueue_packet(struct pbuf *p, struct pbufq *q)
{
SYS_ARCH_DECL_PROTECT(lev);
int ret;
/**
* This entire function must run within a "critical section" to preserve
* the integrity of the transmit pbuf queue.
*
*/
SYS_ARCH_PROTECT(lev);
if(!PBUF_QUEUE_FULL(q)) {
/**
* The queue isn't full so we add the new frame at the current
* write position and move the write pointer.
*
*/
q->pbuf[q->qwrite] = p;
q->qwrite = ((q->qwrite + 1) % STELLARIS_NUM_PBUF_QUEUE);
ret = 1;
}
else {
/**
* The stack is full so we are throwing away this value. Keep track
* of the number of times this happens.
*
*/
q->overflow++;
ret = 0;
}
/* Return to prior interrupt state and return the pbuf pointer. */
SYS_ARCH_UNPROTECT(lev);
return(ret);
}
/**
* In this function, the hardware should be initialized.
* Called from stellarisif_init().
*
* @param netif the already initialized lwip network interface structure
* for this ethernetif
*/
static void
stellarisif_hwinit(struct netif *netif)
{
u32_t temp;
//struct stellarisif *stellarisif = netif->state;
/* set MAC hardware address length */
netif->hwaddr_len = ETHARP_HWADDR_LEN;
/* set MAC hardware address */
EthernetMACAddrGet(ETH_BASE, &(netif->hwaddr[0]));
/* maximum transfer unit */
netif->mtu = 1500;
/* device capabilities */
/* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
/* Do whatever else is needed to initialize interface. */
/* Disable all Ethernet Interrupts. */
EthernetIntDisable(ETH_BASE, (ETH_INT_PHY | ETH_INT_MDIO | ETH_INT_RXER |
ETH_INT_RXOF | ETH_INT_TX | ETH_INT_TXER | ETH_INT_RX));
temp = EthernetIntStatus(ETH_BASE, false);
EthernetIntClear(ETH_BASE, temp);
/* Initialize the Ethernet Controller. */
EthernetInitExpClk(ETH_BASE, SysCtlClockGet());
/*
* Configure the Ethernet Controller for normal operation.
* - Enable TX Duplex Mode
* - Enable TX Padding
* - Enable TX CRC Generation
* - Enable RX Multicast Reception
*/
EthernetConfigSet(ETH_BASE, (ETH_CFG_TX_DPLXEN |ETH_CFG_TX_CRCEN |
ETH_CFG_TX_PADEN | ETH_CFG_RX_AMULEN));
/* Enable the Ethernet Controller transmitter and receiver. */
EthernetEnable(ETH_BASE);
/* Enable the Ethernet Interrupt handler. */
IntEnable(INT_ETH);
/* Enable Ethernet TX and RX Packet Interrupts. */
EthernetIntEnable(ETH_BASE, ETH_INT_RX | ETH_INT_TX);
}
/**
* This function should do the actual transmission of the packet. The packet is
* contained in the pbuf that is passed to the function. This pbuf might be
* chained.
*
* @param netif the lwip network interface structure for this ethernetif
* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
* @return ERR_OK if the packet could be sent
* an err_t value if the packet couldn't be sent
* @note This function MUST be called with interrupts disabled or with the
* Stellaris Ethernet transmit fifo protected.
*/
static err_t
stellarisif_transmit(struct netif *netif, struct pbuf *p)
{
int iBuf;
unsigned char *pucBuf;
unsigned long *pulBuf;
struct pbuf *q;
int iGather;
unsigned long ulGather;
unsigned char *pucGather;
/**
* Fill in the first two bytes of the payload data (configured as padding
* with ETH_PAD_SIZE = 2) with the total length of the payload data
* (minus the Ethernet MAC layer header).
*
*/
*((unsigned short *)(p->payload)) = p->tot_len - 16;
/* Initialize the gather register. */
iGather = 0;
pucGather = (unsigned char *)&ulGather;
ulGather = 0;
/* Copy data from the pbuf(s) into the TX Fifo. */
for(q = p; q != NULL; q = q->next) {
/* Intialize a char pointer and index to the pbuf payload data. */
pucBuf = (unsigned char *)q->payload;
iBuf = 0;
/**
* If the gather buffer has leftover data from a previous pbuf
* in the chain, fill it up and write it to the Tx FIFO.
*
*/
while((iBuf < q->len) && (iGather != 0)) {
/* Copy a byte from the pbuf into the gather buffer. */
pucGather[iGather] = pucBuf[iBuf++];
/* Increment the gather buffer index modulo 4. */
iGather = ((iGather + 1) % 4);
}
/**
* If the gather index is 0 and the pbuf index is non-zero,
* we have a gather buffer to write into the Tx FIFO.
*
*/
if((iGather == 0) && (iBuf != 0)) {
HWREG(ETH_BASE + MAC_O_DATA) = ulGather;
ulGather = 0;
}
/* Initialze a long pointer into the pbuf for 32-bit access. */
pulBuf = (unsigned long *)&pucBuf[iBuf];
/**
* Copy words of pbuf data into the Tx FIFO, but don't go past
* the end of the pbuf.
*
*/
while((iBuf + 4) <= q->len) {
HWREG(ETH_BASE + MAC_O_DATA) = *pulBuf++;
iBuf += 4;
}
/**
* Check if leftover data in the pbuf and save it in the gather
* buffer for the next time.
*
*/
while(iBuf < q->len) {
/* Copy a byte from the pbuf into the gather buffer. */
pucGather[iGather] = pucBuf[iBuf++];
/* Increment the gather buffer index modulo 4. */
iGather = ((iGather + 1) % 4);
}
}
/* Send any leftover data to the FIFO. */
HWREG(ETH_BASE + MAC_O_DATA) = ulGather;
/* Wakeup the transmitter. */
HWREG(ETH_BASE + MAC_O_TR) = MAC_TR_NEWTX;
/* Dereference the pbuf from the queue. */
pbuf_free(p);
LINK_STATS_INC(link.xmit);
return(ERR_OK);
}
/**
* This function with either place the packet into the Stellaris transmit fifo,
* or will place the packet in the interface PBUF Queue for subsequent
* transmission when the transmitter becomes idle.
*
* @param netif the lwip network interface structure for this ethernetif
* @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
* @return ERR_OK if the packet could be sent
* an err_t value if the packet couldn't be sent
*
*/
static err_t
stellarisif_output(struct netif *netif, struct pbuf *p)
{
struct stellarisif *stellarisif = netif->state;
SYS_ARCH_DECL_PROTECT(lev);
/**
* This entire function must run within a "critical section" to preserve
* the integrity of the transmit pbuf queue.
*
*/
SYS_ARCH_PROTECT(lev);
/**
* Bump the reference count on the pbuf to prevent it from being
* freed till we are done with it.
*
*/
pbuf_ref(p);
/**
* If the transmitter is idle, and there is nothing on the queue,
* send the pbuf now.
*
*/
if(PBUF_QUEUE_EMPTY(&stellarisif->txq) &&
((HWREG(ETH_BASE + MAC_O_TR) & MAC_TR_NEWTX) == 0)) {
stellarisif_transmit(netif, p);
}
/* Otherwise place the pbuf on the transmit queue. */
else {
/* Add to transmit packet queue */
if(!enqueue_packet(p, &(stellarisif->txq))) {
/* if no room on the queue, free the pbuf reference and return error. */
pbuf_free(p);
SYS_ARCH_UNPROTECT(lev);
return (ERR_MEM);
}
}
/* Return to prior interrupt state and return. */
SYS_ARCH_UNPROTECT(lev);
return ERR_OK;
}
/**
* This function will read a single packet from the Stellaris ethernet
* interface, if available, and return a pointer to a pbuf. The timestamp
* of the packet will be placed into the pbuf structure.
*
* @param netif the lwip network interface structure for this ethernetif
* @return pointer to pbuf packet if available, NULL otherswise.
*/
static struct pbuf *
stellarisif_receive(struct netif *netif)
{
struct pbuf *p, *q;
u16_t len;
u32_t temp;
int i;
unsigned long *ptr;
#if LWIP_PTPD
u32_t time_s, time_ns;
/* Get the current timestamp if PTPD is enabled */
lwIPHostGetTime(&time_s, &time_ns);
#endif
/* Check if a packet is available, if not, return NULL packet. */
if((HWREG(ETH_BASE + MAC_O_NP) & MAC_NP_NPR_M) == 0) {
return(NULL);
}
/**
* Obtain the size of the packet and put it into the "len" variable.
* Note: The length returned in the FIFO length position includes the
* two bytes for the length + the 4 bytes for the FCS.
*
*/
temp = HWREG(ETH_BASE + MAC_O_DATA);
len = temp & 0xFFFF;
/* We allocate a pbuf chain of pbufs from the pool. */
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
/* If a pbuf was allocated, read the packet into the pbuf. */
if(p != NULL) {
/* Place the first word into the first pbuf location. */
*(unsigned long *)p->payload = temp;
p->payload = (char *)(p->payload) + 4;
p->len -= 4;
/* Process all but the last buffer in the pbuf chain. */
q = p;
while(q != NULL) {
/* Setup a byte pointer into the payload section of the pbuf. */
ptr = q->payload;
/**
* Read data from FIFO into the current pbuf
* (assume pbuf length is modulo 4)
*
*/
for(i = 0; i < q->len; i += 4) {
*ptr++ = HWREG(ETH_BASE + MAC_O_DATA);
}
/* Link in the next pbuf in the chain. */
q = q->next;
}
/* Restore the first pbuf parameters to their original values. */
p->payload = (char *)(p->payload) - 4;
p->len += 4;
/* Adjust the link statistics */
LINK_STATS_INC(link.recv);
#if LWIP_PTPD
/* Place the timestamp in the PBUF */
p->time_s = time_s;
p->time_ns = time_ns;
#endif
}
/* If no pbuf available, just drain the RX fifo. */
else {
for(i = 4; i < len; i+=4) {
temp = HWREG(ETH_BASE + MAC_O_DATA);
}
/* Adjust the link statistics */
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
}
return(p);
}
/**
* Should be called at the beginning of the program to set up the
* network interface. It calls the function stellarisif_hwinit() to do the
* actual setup of the hardware.
*
* This function should be passed as a parameter to netif_add().
*
* @param netif the lwip network interface structure for this ethernetif
* @return ERR_OK if the loopif is initialized
* ERR_MEM if private data couldn't be allocated
* any other err_t on error
*/
err_t
stellarisif_init(struct netif *netif)
{
LWIP_ASSERT("netif != NULL", (netif != NULL));
#if LWIP_NETIF_HOSTNAME
/* Initialize interface hostname */
netif->hostname = "lwip";
#endif /* LWIP_NETIF_HOSTNAME */
/*
* Initialize the snmp variables and counters inside the struct netif.
* The last argument should be replaced with your link speed, in units
* of bits per second.
*/
NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 1000000);
netif->state = &stellarisif_data;
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
/* We directly use etharp_output() here to save a function call.
* You can instead declare your own function an call etharp_output()
* from it if you have to do some checks before sending (e.g. if link
* is available...) */
netif->output = etharp_output;
netif->linkoutput = stellarisif_output;
stellarisif_data.ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
stellarisif_data.txq.qread = stellarisif_data.txq.qwrite = 0;
stellarisif_data.txq.overflow = 0;
/* initialize the hardware */
stellarisif_hwinit(netif);
return ERR_OK;
}
/**
* Process tx and rx packets at the low-level interrupt.
*
* Should be called from the Stellaris Ethernet Interrupt Handler. This
* function will read packets from the Stellaris Ethernet fifo and place them
* into a pbuf queue. If the transmitter is idle and there is at least one packet
* on the transmit queue, it will place it in the transmit fifo and start the
* transmitter.
*
*/
void
stellarisif_interrupt(struct netif *netif)
{
struct stellarisif *stellarisif;
struct pbuf *p;
/* setup pointer to the if state data */
stellarisif = netif->state;
/**
* Process the transmit and receive queues as long as there is receive
* data available
*
*/
p = stellarisif_receive(netif);
while(p != NULL) {
/* process the packet */
#if NO_SYS
if(ethernet_input(p, netif)!=ERR_OK) {
#else
if(tcpip_input(p, netif)!=ERR_OK) {
#endif
/* drop the packet */
LWIP_DEBUGF(NETIF_DEBUG, ("stellarisif_input: input error\n"));
pbuf_free(p);
/* Adjust the link statistics */
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
}
/* Check if TX fifo is empty and packet available */
if((HWREG(ETH_BASE + MAC_O_TR) & MAC_TR_NEWTX) == 0) {
p = dequeue_packet(&stellarisif->txq);
if(p != NULL) {
stellarisif_transmit(netif, p);
}
}
/* Read another packet from the RX fifo */
p = stellarisif_receive(netif);
}
/* One more check of the transmit queue/fifo */
if((HWREG(ETH_BASE + MAC_O_TR) & MAC_TR_NEWTX) == 0) {
p = dequeue_packet(&stellarisif->txq);
if(p != NULL) {
stellarisif_transmit(netif, p);
}
}
}
#if NETIF_DEBUG
/* Print an IP header by using LWIP_DEBUGF
* @param p an IP packet, p->payload pointing to the IP header
*/
void
stellarisif_debug_print(struct pbuf *p)
{
struct eth_hdr *ethhdr = (struct eth_hdr *)p->payload;
u16_t *plen = (u16_t *)p->payload;
LWIP_DEBUGF(NETIF_DEBUG, ("ETH header:\n"));
LWIP_DEBUGF(NETIF_DEBUG, ("Packet Length:%5"U16_F" \n",*plen));
LWIP_DEBUGF(NETIF_DEBUG, ("Destination: %02"X8_F"-%02"X8_F"-%02"X8_F"-%02"X8_F"-%02"X8_F"-%02"X8_F"\n",
ethhdr->dest.addr[0],
ethhdr->dest.addr[1],
ethhdr->dest.addr[2],
ethhdr->dest.addr[3],
ethhdr->dest.addr[4],
ethhdr->dest.addr[5]));
LWIP_DEBUGF(NETIF_DEBUG, ("Source: %02"X8_F"-%02"X8_F"-%02"X8_F"-%02"X8_F"-%02"X8_F"-%02"X8_F"\n",
ethhdr->src.addr[0],
ethhdr->src.addr[1],
ethhdr->src.addr[2],
ethhdr->src.addr[3],
ethhdr->src.addr[4],
ethhdr->src.addr[5]));
LWIP_DEBUGF(NETIF_DEBUG, ("Packet Type:0x%04"U16_F" \n", ethhdr->type));
}
#endif /* NETIF_DEBUG */
Has anyone encountered this or a good way to debug using the FAULT ISR? I'm really stumped. Thanks!
-Brian
