[参考译文] CC3220SF：为什么 UART.h 读取回调失败？

尊敬的 Shlomi：

我参考 uart2callback 示例代码、我修改并测试此代码对我来说很好。 接下来、我将创建一个新线程、以便在(1)｛...｝时为其提供服务 并获取24字节 RX 数据。 感谢你的帮助。

/*
 * Copyright (c) 2015-2020, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  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.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR
 * CONTRIBUTORS 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;
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 * 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.
 */

/*
 *  ======== 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);
      }
    }
}

此致、

Lishen