Other Parts Discussed in Thread: CONTROLSUITE, MAX3232, MAX232
Hi , this is my first post in TI forums .
I am using Delfino F2837x Control Card R1.1 and Docking Station R4.1 , I have installed CCS6.1 and controlSuite , I have a problem using sample code of sci_echoback_cpu01 , I built it and then pressed debug key in ccs , everything is ok , but I received unrecognized words in hyperterminal instead Hello World! and other messages .
I think that it should be baudrate problem , but I did not changed anything , it's all default codes .
here is my code :
//###########################################################################
// FILE: Example_28X7xSci_Echoback.c
// TITLE: SCI Echoback.
//
//! \addtogroup cpu01_example_list
//! <h1>SCI Echoback</h1>
//!
//! This test receives and echo-backs data through the SCI-A port.
//!
//! The PC application 'hypterterminal' can be used to view the data
//! from the SCI and to send information to the SCI. Characters received
//! by the SCI port are sent back to the host.
//!
//! \b Running \b the \b Application
//! -# Configure hyperterminal:
//! Use the included hyperterminal configuration file SCI_96.ht.
//! To load this configuration in hyperterminal
//! -# Open hyperterminal
//! -# Go to file->open
//! -# Browse to the location of the project and
//! select the SCI_96.ht file.
//! -# Check the COM port.
//! The configuration file is currently setup for COM1.
//! If this is not correct, disconnect (Call->Disconnect)
//! Open the File-Properties dialog and select the correct COM port.
//! -# Connect hyperterminal Call->Call
//! and then start the 2806x SCI echoback program execution.
//! -# The program will print out a greeting and then ask you to
//! enter a character which it will echo back to hyperterminal.
//!
//! \note If you are unable to open the .ht file, you can create
//! a new one with the following settings
//! - Find correct COM port
//! - Bits per second = 9600
//! - Date Bits = 8
//! - Parity = None
//! - Stop Bits = 1
//! - Hardware Control = None
//!
//! \b Watch \b Variables \n
//! - \b LoopCount, for the number of characters sent
//! - ErrorCount
//!
//! \b External \b Connections \n
//! Connect the SCI-A port to a PC via a transceiver and cable.
//! - GPIO28 is SCI_A-RXD (Connect to Pin3, PC-TX, of serial DB9 cable)
//! - GPIO29 is SCI_A-TXD (Connect to Pin2, PC-RX, of serial DB9 cable)
//
//###########################################################################
// $TI Release: F2837xD Support Library v110 $
// $Release Date: Mon Apr 7 10:35:37 CDT 2014 $
//###########################################################################
#include "F28x_Project.h" // Device Headerfile and Examples Include File
// Prototype statements for functions found within this file.
void scia_echoback_init(void);
void scia_fifo_init(void);
void scia_xmit(int a);
void scia_msg(char *msg);
// Global counts used in this example
Uint16 LoopCount;
Uint16 ErrorCount;
void main(void)
{
Uint16 ReceivedChar;
char *msg;
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the F2837xD_SysCtrl.c file.
InitSysCtrl();
// Step 2. Initialize GPIO:
// This example function is found in the F2837xD_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
InitGpio();
// For this example, only init the pins for the SCI-A port.
// These functions are found in the F2837xD_Gpio.c file.
GPIO_SetupPinMux(28, GPIO_MUX_CPU1, 1);
GPIO_SetupPinOptions(28, GPIO_INPUT, GPIO_PUSHPULL);
GPIO_SetupPinMux(29, GPIO_MUX_CPU1, 1);
GPIO_SetupPinOptions(29, GPIO_OUTPUT, GPIO_PUSHPULL);
// Step 3. Clear all __interrupts and initialize PIE vector table:
// Disable CPU __interrupts
DINT;
// Initialize PIE control registers to their default state.
// The default state is all PIE __interrupts disabled and flags
// are cleared.
// This function is found in the F2837xD_PieCtrl.c file.
InitPieCtrl();
// Disable CPU __interrupts and clear all CPU __interrupt flags:
IER = 0x0000;
IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the __interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in F2837xD_DefaultIsr.c.
// This function is found in F2837xD_PieVect.c.
InitPieVectTable();
// Step 4. Initialize all the Device Peripherals:
// This function is found in F2837xD_InitPeripherals.c
// InitPeripherals(); // Not required for this example
// Step 5. User specific code:
LoopCount = 0;
ErrorCount = 0;
scia_fifo_init(); // Initialize the SCI FIFO
scia_echoback_init(); // Initialize SCI for echoback
msg = ":Hello World!;";
scia_msg(msg);
msg = ":You will enter a character, and the DSP will echo it back!;";
scia_msg(msg);
for(;;)
{
msg = ":Enter a character;";
scia_msg(msg);
// Wait for inc character
while(SciaRegs.SCIFFRX.bit.RXFFST !=1) { } // wait for XRDY =1 for empty state
// Get character
ReceivedChar = SciaRegs.SCIRXBUF.all;
// Echo character back
msg = ":You sent ;";
scia_msg(msg);
scia_xmit(ReceivedChar);
LoopCount++;
}
}
// Test 1,SCIA DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parity
void scia_echoback_init()
{
// Note: Clocks were turned on to the SCIA peripheral
// in the InitSysCtrl() function
SciaRegs.SCICCR.all = 0x0007; // 1 stop bit, No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
SciaRegs.SCICTL1.all = 0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
SciaRegs.SCICTL2.all = 0x0003;
SciaRegs.SCICTL2.bit.TXINTENA = 1;
SciaRegs.SCICTL2.bit.RXBKINTENA = 1;
// SciaRegs.SCIHBAUD =0x0002; // 9600 baud @LSPCLK = 50MHz (200 MHz SYSCLK).
// SciaRegs.SCILBAUD =0x008B;
SciaRegs.SCIHBAUD = 0x0002; // 9600 baud @LSPCLK = 50MHz (200 MHz SYSCLK).
SciaRegs.SCILBAUD = 0x008B;
SciaRegs.SCICTL1.all = 0x0023; // Relinquish SCI from Reset
}
// Transmit a character from the SCI
void scia_xmit(int a)
{
while (SciaRegs.SCIFFTX.bit.TXFFST != 0) {}
SciaRegs.SCITXBUF=a;
}
void scia_msg(char * msg)
{
int i;
i = 0;
while(msg[i] != '\0')
{
scia_xmit(msg[i]);
i++;
}
}
// Initialize the SCI FIFO
void scia_fifo_init()
{
SciaRegs.SCIFFTX.all=0xE040;
SciaRegs.SCIFFRX.all=0x2044;
SciaRegs.SCIFFCT.all=0x0;
}
//===========================================================================
// No more.
//===========================================================================
my hyperterminal application is configured on COM1 9600 8-N-1 .
I was tried to changed baud rated by changing SciaRegs.SCIHBAUD and SciaRegs.SCILBAUD registers but no success .
please help me solve this problem . thanks .
