CCS/TMS570LC4357: UART BUFFER PROBLEM

I update the code, because I not use in the moment the instruction scisendbyte inside of the sci notificacion. This part of the code is:

void sciNotification(sciBASE_t *sci, unsigned flags)
{

if(sci==BLUE){
sciReceive(sci,1,(unsigned char *)&rx_buffer_blue[rxb_next]);
rxb_next++;

if(sciIsRxReady(sci)==0){
flag_Blue=1;
}

}

Hello Sanchez,

Unfortunately, I wasn't able to dive too deep into this to determine an exact root cause, but in prior issues like this I found that there was an issue with initialization of the interrupt and the first byte is lost because the interrupt doesn't come until the second byte.

Where in your code do you initialize/enable the interrupt during your code startup?

Hello Chuck,

Above of the initialitation of the interrupt I share a part of my code:

// @file HL_sys_main.c

#include "HL_sci.h"
#include "HL_het.h"
#include "HL_gio.h"
#include "stdlib.h"
#include "HL_sci.h"

/* USER CODE END */
/* Include Files */

#include "HL_sys_common.h"

/* USER CODE BEGIN (1) */
//==================================Variables IRIDIUM & DEBUG
unsigned char command;
unsigned char rx_buffer_blue[100];
int rx_next=0;
int rx_read=0;
int rxb_next=0;
int rxb_read=0;

uint8_t flag_Blue=0;

void Plot_Debug();

void sci_Restart()

{
sciInit();
_enable_IRQ();

sciEnableNotification(BLUE, SCI_RX_INT);
sciReceive(BLUE, 1, (unsigned char *)&rx_buffer_blue);

}

void MCU_Init()

{
//int i=0;
sciInit();
adcInit();
//adcInit();
//sciSend(DEBUG, 11, (unsigned char*)"MCU INIT!\r\n");
gioSetDirection(hetPORT1, 0x2040240A);
gioSetPort(hetPORT1, 0x00000000);
gioSetDirection(hetPORT2, 0xFFFFFFFF);
gioSetPort(hetPORT2, 0x00000000);

_enable_IRQ();
sciEnableNotification(BLUE, SCI_RX_INT);

//Inputs

//gioSetBit(hetPORT1,12,0); //CTS
//gioSetBit(hetPORT1,16,0); //DCD
//gioSetBit(hetPORT1,14,0); //DSR

//Outputs

gioSetBit(hetPORT2,13,1); //RTS 
gioSetBit(hetPORT1,29,1); //DTR 

sciReceive(BLUE, 1, (unsigned char *)&rx_buffer_blue[99]);

rx_buffer_blue[99]=0;
sciSend(BLUE, 11, (unsigned char*)"MCU Init!\r\n");
}

/* USER CODE END */

/** @fn void main(void)
* @brief Application main function
* @note This function is empty by default.
*
* This function is called after startup.
* The user can use this function to implement the application.
*/

/* USER CODE BEGIN (2) */

/* USER CODE END */

int main(void)

{
/* USER CODE BEGIN (3) */
int i=0;
MCU_Init();

//sci_Restart();
while(1)
{
rx_next=0;
rx_read=0;
rxb_next=0;
rxb_read=0;

delay(10);

if(flag_Blue==1){ //Read the buffer 
sciSend(BLUE,11, (unsigned char*)"\r\nbuffer!\r\n");

while(flag_Blue==1){
sciSendByte(BLUE,rx_buffer_blue[rxb_read]);
rxb_read++;
rxb_next--;
if(rxb_next==-1){
flag_Blue=0;
rxb_read=0;
rxb_next=0;
for(i=0;i<100;i++){
rx_buffer_blue[i]=0;}
}
}
}

 }

void sciNotification(sciBASE_t *sci, unsigned flags)

{

if(sci==BLUE){
sciReceive(sci,1,(unsigned char *)&rx_buffer_blue[rxb_next]);
sciSendByte(BLUE,rx_buffer_blue[rxb_next]);
rxb_next++;

}

{

I followed the example of you IT, the only difference is the buffer, this buffers  storage the bytes that received in the port (color blue)

Hi Sanchez
Were you able to solve this issue?
Regards
Mukul