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Tool/software: Code Composer Studio
Dear, TI
Do you have example TCP/IP Client with board EK-TM4C1294XL?
Please recoment me.
Thank you
RATWO
Hi Ratthawut,
I came across this client example that you can reference. You will need to fine tune the code to suit your application. Please note, by no means this is a fully verified example. You will be responsible to modify if you came across bugs or performance issues.
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "driverlib/flash.h"
#include "driverlib/interrupt.h"
#include "driverlib/gpio.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/systick.h"
#include "inc/hw_emac.h"
#include "utils/lwiplib.h"
#include "utils/ustdlib.h"
#include "utils/uartstdio.h"
#include "drivers/pinout.h"
#include "lwip/debug.h"
#include "lwip/stats.h"
#include "lwip/tcp.h"
extern void echo_init(void);
err_t echo_recv(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err);
err_t echo_poll(void *arg, struct tcp_pcb *tpcb);
void echo_error(void *arg, err_t err);
err_t echo_sent(void *arg, struct tcp_pcb *tpcb, u16_t len);
err_t err;
uint32_t tcp_send_packet(void);
static struct tcp_pcb *testpcb; //pcb global
#define SYSTICKHZ 100
#define SYSTICKMS (1000 / SYSTICKHZ)
#define SYSTICK_INT_PRIORITY 0x80
#define ETHERNET_INT_PRIORITY 0xC0
uint32_t g_ui32IPAddress;
uint32_t g_ui32SysClock;
volatile bool g_bLED;
bool g_bIPAddrValid = 0;
//*****************************************************************************
// The error routine that is called if the driver library encounters an error.
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, uint32_t ui32Line)
{
}
#endif
void
DisplayIPAddress(uint32_t ui32Addr)
{
char pcBuf[16];
// Convert the IP Address into a string.
usprintf(pcBuf, "%d.%d.%d.%d", ui32Addr & 0xff, (ui32Addr >> 8) & 0xff,
(ui32Addr >> 16) & 0xff, (ui32Addr >> 24) & 0xff);
UARTprintf(pcBuf);
}
//*****************************************************************************
// Required by lwIP library to support any host-related timer functions.
//*****************************************************************************
void
lwIPHostTimerHandler(void)
{
uint32_t ui32NewIPAddress;
ui32NewIPAddress = lwIPLocalIPAddrGet(); // Get the current IP address.
if(ui32NewIPAddress != g_ui32IPAddress) // See if the IP address has changed.
{
if(ui32NewIPAddress == 0xffffffff)
{
UARTprintf("Waiting for link.\n");
}
else if(ui32NewIPAddress == 0)
{
UARTprintf("Waiting for IP address.\n");
}
else
{
g_bIPAddrValid = 1;
UARTprintf("IP Address: ");
DisplayIPAddress(ui32NewIPAddress);
UARTprintf("\n\n");
}
g_ui32IPAddress = ui32NewIPAddress;
}
if((ui32NewIPAddress == 0) || (ui32NewIPAddress == 0xffffffff))
{
//
// Do nothing and keep waiting.
//
}
}
//*****************************************************************************
// The interrupt handler for the SysTick interrupt.
//*****************************************************************************
void
SysTickIntHandler(void)
{
lwIPTimer(SYSTICKMS);
g_bLED = true;
}
//*****************************************************************************
char mydata[1024];
err_t echo_receive(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
{
int len;
char *header = "Client: ";
int header_len = strlen(header);
UARTprintf("Data received.\n");
if (p == NULL) {
UARTprintf("The remote host closed the connection.\n");
tcp_close(tpcb);
return ERR_ABRT;
} else {
tcp_recved(tpcb, p->tot_len);
//size of the pay load
len = p->tot_len + header_len;
strcpy(mydata, header);
strcat(mydata, (char *)p->payload);
//Free the packet buffer
pbuf_free(p);
//check output buffer capacity
if (len > tcp_sndbuf(tpcb))
len= tcp_sndbuf(tpcb);
//Enqueue the data to send out
//err = tcp_write(tpcb, mydata, len, 0);
err = tcp_write(tpcb, mydata, len, 0);
if (err == ERR_OK) {
UARTprintf("Echo the data out\n");
}
else if(err == ERR_MEM)
{
/* we are low on memory, try later, defer to poll */
UARTprintf("Low on memory.\n");
} else
{
/* Other problems to take care of */
UARTprintf("Other problems.\n");
}
tcp_sent(tpcb, NULL); /* No need to call back */
}
return ERR_OK;
}
uint32_t tcp_send_packet(void)
{
char *string = "Hello World! \n\r ";
err = tcp_write(testpcb, string, strlen(string), TCP_WRITE_FLAG_COPY);
if (err) {
UARTprintf("ERROR: Code: %d (tcp_send_packet :: tcp_write)\n", err);
return 1;
}
/* now send */
err = tcp_output(testpcb);
if (err) {
UARTprintf("ERROR: Code: %d (tcp_send_packet :: tcp_output)\n", err);
return 1;
}
return 0;
}
err_t connectCallback(void *arg, struct tcp_pcb *tpcb, err_t err)
{
if (err == ERR_OK){
UARTprintf("Connection Established.\n");
tcp_recv(testpcb, echo_receive);
tcp_sent(testpcb, NULL);
UARTprintf("Sending a greeting message to the Server\n");
tcp_send_packet();
return 0;
} else {
UARTprintf("No Connection Established.\n");
return 1;
}
}
void echo_client_init(void)
{
/* create an ip */
struct ip_addr server_addr;
/* create the control block */
testpcb = tcp_new(); //testpcb is a global struct tcp_pcb
if (testpcb != NULL)
{
IP4_ADDR(&server_addr, 10,219,15,38); //IP of the PC computer
tcp_bind(testpcb, IP_ADDR_ANY, 7000);
/* now connect */
err = tcp_connect(testpcb, &server_addr, 8000, connectCallback);
if (err) {
UARTprintf("ERROR: Code: %d (tcp_connect)\n", err);
}
UARTprintf("PCB CREATED\n");
} else {
memp_free(MEMP_TCP_PCB, testpcb);
UARTprintf("PCB NOT CREATED\n");
}
}
int
main(void)
{
uint32_t ui32User0, ui32User1;
uint8_t pui8MACArray[8];
SysCtlMOSCConfigSet(SYSCTL_MOSC_HIGHFREQ);
g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
SYSCTL_OSC_MAIN |
SYSCTL_USE_PLL |
SYSCTL_CFG_VCO_480), 120000000);
PinoutSet(true, false);
UARTStdioConfig(0, 115200, g_ui32SysClock);
UARTprintf("\033[2J\033[H");
UARTprintf("Ethernet lwIP TCP echo client example\n\n");
MAP_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_1);
MAP_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_1, ~GPIO_PIN_1);
MAP_SysTickPeriodSet(g_ui32SysClock / SYSTICKHZ);
MAP_SysTickEnable();
MAP_SysTickIntEnable();
MAP_FlashUserGet(&ui32User0, &ui32User1);
if((ui32User0 == 0xffffffff) || (ui32User1 == 0xffffffff))
{
UARTprintf("No MAC programmed!\n");
while(1)
{
}
}
UARTprintf("Waiting for IP.\n");
pui8MACArray[0] = ((ui32User0 >> 0) & 0xff);
pui8MACArray[1] = ((ui32User0 >> 8) & 0xff);
pui8MACArray[2] = ((ui32User0 >> 16) & 0xff);
pui8MACArray[3] = ((ui32User1 >> 0) & 0xff);
pui8MACArray[4] = ((ui32User1 >> 8) & 0xff);
pui8MACArray[5] = ((ui32User1 >> 16) & 0xff);
lwIPInit(g_ui32SysClock, pui8MACArray, 0, 0, 0, IPADDR_USE_DHCP);
while (g_bIPAddrValid == 0);
echo_client_init();
MAP_IntPrioritySet(INT_EMAC0, ETHERNET_INT_PRIORITY);
MAP_IntPrioritySet(FAULT_SYSTICK, SYSTICK_INT_PRIORITY);
//
// Loop forever, processing the LED blinking. All the work is done in
// interrupt handlers.
while(1)
{
while(g_bLED == false)
{
}
//
// Clear the flag.
//
g_bLED = false;
//
// Toggle the LED.
//
MAP_GPIOPinWrite(GPIO_PORTN_BASE, GPIO_PIN_1,
(MAP_GPIOPinRead(GPIO_PORTN_BASE, GPIO_PIN_1) ^
GPIO_PIN_1));
}
}
