examples/platform/qpg/uart.c

/*
 *
 *    Copyright (c) 2021 Project CHIP Authors
 *    All rights reserved.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
#include "uart.h"
#include "FreeRTOS.h"
#include "qvIO.h"
#include "task.h"
#include <stddef.h>
#include <stdio.h>

#define UART_CONSOLE_ERR -1 // Negative value in case of UART Console action failed. Triggers a failure for PW_RPC

void uartConsoleInit(void)
{
    qvIO_UartInit();
}

int16_t uartConsoleWrite(const char * Buf, uint16_t BufLength)
{
    if (Buf == NULL || BufLength < 1)
    {
        return UART_CONSOLE_ERR;
    }

    qvIO_UartTxData((uint8_t) BufLength, Buf);
    return (int16_t) BufLength;
}

int16_t uartConsoleRead(char * Buf, uint16_t BufLength)
{
    if (Buf == NULL || BufLength < 1)
    {
        return UART_CONSOLE_ERR;
    }
    vTaskDelay(1); // taskYIELD or vTaskDelay(0) is not sufficient
    uint8_t rxLen = qvIO_UartReadRxData((uint8_t) BufLength, Buf);
    return (int16_t) rxLen;
}