x 過去ログを見よ
x PA_2をOBでGPIOに出来る人むけ
x STM32G031は、秋月で売っているSTM32G031J6M6の事
目的
シリアルのテスト



//HAL_ds1307_S_SER_031_1

#include "mbed.h"


int main()
{

    UART_HandleTypeDef hlpuart1;

    RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_LPUART1;
    PeriphClkInit.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_HSI;
    HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);


    __HAL_RCC_GPIOA_CLK_ENABLE();

    __HAL_RCC_LPUART1_CLK_ENABLE();


    GPIO_InitTypeDef GPIO_InitStruct = {0};

    GPIO_InitStruct.Pin = GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF6_LPUART1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);


    hlpuart1.Instance = LPUART1;
    hlpuart1.Init.BaudRate = 9600;
    hlpuart1.Init.WordLength = UART_WORDLENGTH_8B;
    hlpuart1.Init.StopBits = UART_STOPBITS_1;
    hlpuart1.Init.Parity = UART_PARITY_NONE;
    hlpuart1.Init.Mode = UART_MODE_TX_RX;
    hlpuart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    hlpuart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
    hlpuart1.Init.ClockPrescaler = UART_PRESCALER_DIV1;
    hlpuart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
    hlpuart1.FifoMode = UART_FIFOMODE_DISABLE;

    HAL_HalfDuplex_Init(&hlpuart1);
    HAL_UARTEx_SetTxFifoThreshold(&hlpuart1, UART_TXFIFO_THRESHOLD_1_8);
    HAL_UARTEx_SetRxFifoThreshold(&hlpuart1, UART_RXFIFO_THRESHOLD_1_8);
    HAL_UARTEx_DisableFifoMode(&hlpuart1);


    while(1) {

        //表示
        //                                       12345678901
        HAL_UART_Transmit(&hlpuart1, (uint8_t *)"hello world", 11, 10);
        HAL_UART_Transmit(&hlpuart1, (uint8_t *)"\r", 1, 10);
        HAL_UART_Transmit(&hlpuart1, (uint8_t *)"\n", 1, 10);

        // 1秒待つ
        HAL_Delay(1000);

    }//while

}//main