CCS/MSP432P401R: UART interrupt using RTOS

/*
 * Copyright (c) 2015-2019, 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;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * 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>
#include <unistd.h>
/* Driver Header files */
#include <ti/drivers/GPIO.h>
#include <ti/drivers/UART.h>

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

static char response;


void readCallback(UART_Handle uartHandle, void *response, size_t count)
{

    GPIO_toggle(CONFIG_GPIO_LED_0);

}

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{

    UART_Handle uart1;
    UART_Params uartParams1;

    /* 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);

    /* Turn on user LED */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_ON);

    /* Create a UART with data processing off. */
    UART_Params_init(&uartParams1);
    uartParams1.readMode = UART_MODE_CALLBACK;
    uartParams1.writeMode = UART_MODE_BLOCKING;
    uartParams1.readTimeout = UART_WAIT_FOREVER;
    uartParams1.writeTimeout = UART_WAIT_FOREVER;
    uartParams1.readCallback = readCallback;
    uartParams1.writeCallback = NULL;
    uartParams1.readReturnMode = UART_RETURN_FULL;
    uartParams1.readDataMode = UART_DATA_BINARY;
    uartParams1.writeDataMode = UART_DATA_BINARY;
    uartParams1.readEcho = UART_ECHO_OFF;
    uartParams1.baudRate = 115200;
    uartParams1.dataLength = UART_LEN_8;
    uartParams1.stopBits = UART_STOP_ONE;
    uartParams1.parityType = UART_PAR_NONE;

    uart1 = UART_open(CONFIG_UART_1, &uartParams1);

    if (uart1 == NULL) {
        /* UART_open() failed */
        while (1);
    }

    while (1) {

        UART_read(uart1, &response, 1);

    }
}