CC3220SF: Why read callback fail with UART.h?

Dear Shlomi,

I reference uart2callback sample code, I modify and test this code is good for me. Next I will create a new thread to service this while(1){...} and get 24 Bytes RX data. Thanks for your help.

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/*
 *  ======== uartecho.c ========
 */
#include <stdint.h>
#include <stddef.h>

/* POSIX Header files */
#include <semaphore.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/UART.h>

/* Driver configuration */
#include "ti_drivers_config.h"

volatile char g_ucInput = 0;
//volatile char g_ucRxDBuf[8] = {0};
volatile char g_ucRxDBuf[24] = {0};
volatile char g_ucTestLEDFlag = 0;


static sem_t sem_UartRxCallBack;

#if (0)
void readcallback_LS (UART_Handle handle, void *buf, size_t count)
{
  char i;
  char i_input;
  UART_read(uart, &i_input, 1);
  g_ucInput = i_input;
  for(i=7; i>=1; i--)
  {
    g_ucRxDBuf[i] = g_ucRxDBuf[i-1];
  }
  g_ucRxDBuf[0]=g_ucInput;
} // End void readcallback_LS (UART_Handle handle, void *buf, size_t count)
#endif

void readcallback_LS (UART_Handle handle, void *buf, size_t count)
{
  sem_post(&sem_UartRxCallBack);
}

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    unsigned char i;
    char        input;
    const char  echoPrompt[] = "Echoing characters:\r\n";
    const char  RightMatch[] = "Match J-MEX WiFi-Moti command\r\n";
    UART_Params uartParams;
    UART_Handle uart;

    /* Call driver init functions */
    GPIO_init();
    UART_init();

    /* Configure the LED pin */
    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    /* Create semaphore */
    sem_init(&sem_UartRxCallBack, 0, 0);

    /* Create a UART with data processing off. */
    UART_Params_init(&uartParams);
    uartParams.readMode = UART_MODE_CALLBACK;
    uartParams.writeMode = UART_MODE_BLOCKING;
    uartParams.readCallback = readcallback_LS;
    uartParams.readReturnMode = UART_RETURN_FULL;
    uartParams.readDataMode = UART_DATA_BINARY;
    uartParams.writeDataMode = UART_DATA_BINARY;
    uartParams.readEcho = UART_ECHO_OFF;
    uartParams.baudRate = 115200;
    uartParams.dataLength = UART_LEN_8;
    uartParams.stopBits = UART_STOP_ONE;
    uartParams.parityType = UART_PAR_NONE;

    uart = UART_open(CONFIG_UART_0, &uartParams);

    if (uart == NULL) {
        /* UART_open() failed */
        while (1);
    }

    /* Turn on user LED to indicate successful initialization */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_ON);

    UART_write(uart, echoPrompt, sizeof(echoPrompt));

    UART_control(uart, UART_CMD_RXENABLE, NULL);      //callback function will work. so this is enable RX interrupt.
    //UART_control(uart, UART_CMD_RXDISABLE, NULL);     //callback function will not working. so this is disable RX interrupt.

    /* Loop forever echoing */
    while (1)
    {
      UART_read(uart, &input, 1);
      /* until read callback executes */
      sem_wait(&sem_UartRxCallBack);
      for(i=23; i>=1; i--)
      {
        g_ucRxDBuf[i] = g_ucRxDBuf[i-1];
      }
      g_ucRxDBuf[0]=input;

      if( (g_ucRxDBuf[23]==0x4C) && (g_ucRxDBuf[22]==0x53) && (g_ucRxDBuf[21]==0x14) && (g_ucRxDBuf[0]==0x23) )
      {
        UART_write(uart, RightMatch, sizeof(RightMatch));
        GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_ON);
        for(i=0; i<=23; i++)
        {
          g_ucRxDBuf[i] = 0;    // reset all UART RxD command Buffer
        }
      }
      else
      {
        GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);
      }
    }
}

Best Regards,

Lishen