tuber/desk/modules/uart_bridge/uart_bridge.cpp

#include "stm32g4xx_hal.h"
#include "uart_bridge.h"
#include "uart_bridge_cfg.h"


UART_HandleTypeDef huart_bridge;

static uint8_t rx_byte;


void init_usart(void)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_USART2_CLK_ENABLE();
    
    GPIO_InitStruct.Pin       = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3;
    GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull      = GPIO_PULLUP;
    GPIO_InitStruct.Speed     = GPIO_SPEED_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    
    huart_bridge.Instance           = USART2;
    huart_bridge.Init.BaudRate      = UB_BAUDRATE;
    huart_bridge.Init.WordLength    = UART_WORDLENGTH_8B;
    huart_bridge.Init.StopBits      = UART_STOPBITS_1;
    huart_bridge.Init.Parity        = UART_PARITY_NONE;
    huart_bridge.Init.Mode          = UART_MODE_TX_RX;
    huart_bridge.Init.HwFlowCtl     = UART_HWCONTROL_NONE;
    huart_bridge.Init.OverSampling  = UART_OVERSAMPLING_8;
    huart_bridge.Init.OneBitSampling= UART_ONE_BIT_SAMPLE_DISABLE;
    HAL_UART_Init(&huart_bridge);
    
    HAL_RS485Ex_Init(&huart_bridge, UART_DE_POLARITY_HIGH, 0, 0);

    HAL_NVIC_SetPriority(USART2_IRQn, 6, 0);
    HAL_NVIC_EnableIRQ(USART2_IRQn);
    HAL_UART_Receive_IT(&huart_bridge, &rx_byte, 1);
}


extern "C" {
  
void USART2_IRQHandler(void)
{
    HAL_UART_Receive_IT(&huart_bridge, &rx_byte, 1);
    //sbsTerminal.put_byte((char)(uart.Instance->RDR & (uint16_t)0x01FF));
}

}