gmv-gateway-board/Core/Src/mini_gateway_master.c

//
// Created by DELL on 2024/10/16.
//

#include <stdint.h>
#include "mini_gateway_master.h"
#include "usart.h"

static int32_t uart_read(uint8_t *buf, uint16_t count, int32_t byte_timeout_ms,
                         void *arg) {
    HAL_StatusTypeDef status = HAL_UART_Receive(&huart2, buf, count, byte_timeout_ms);
    if (status == HAL_OK) {
        return count;
    } else {
        return 0;
    }
}

static int32_t uart_write(const uint8_t *buf, uint16_t count, int32_t byte_timeout_ms,
                          void *arg) {
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_SET);
    HAL_UART_Transmit(&huart2, buf, count, byte_timeout_ms);
    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_RESET);
    return count;
}