[STM32G0] STM32G071RB：入门级MCU的高性价比之选

#include "main.h"



// UART句柄定义

UART_HandleTypeDef huart2;



// 函数声明

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_USART2_UART_Init(void);



int main(void)

{

    uint8_t txData[] = "Hello, STM32G071RB!\r\n";

    uint8_t rxData[10];



    HAL_Init();

    SystemClock_Config();

    MX_GPIO_Init();

    MX_USART2_UART_Init();



    while (1)

    {

        // 发送数据

        HAL_UART_Transmit(&huart2, txData, sizeof(txData) - 1, HAL_MAX_DELAY);



        // 接收数据

        HAL_UART_Receive(&huart2, rxData, sizeof(rxData), HAL_MAX_DELAY);



        // 将接收到的数据回传

        HAL_UART_Transmit(&huart2, rxData, sizeof(rxData), HAL_MAX_DELAY);

    }

}



// 配置系统时钟

void SystemClock_Config(void)

{

    RCC_OscInitTypeDef RCC_OscInitStruct = {0};

    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};



    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;

    RCC_OscInitStruct.HSIState = RCC_HSI_ON;

    RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;

    RCC_OscInitStruct.PLL.PLLM = 1;

    RCC_OscInitStruct.PLL.PLLN = 8;

    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;

    RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;

    RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;



    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

    {

        Error_Handler();

    }

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1;

    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;

    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;



    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)

    {

        Error_Handler();

    }

}



// 初始化USART2

static void MX_USART2_UART_Init(void)

{

    huart2.Instance = USART2;

    huart2.Init.BaudRate = 115200;

    huart2.Init.WordLength = UART_WORDLENGTH_8B;

    huart2.Init.StopBits = UART_STOPBITS_1;

    huart2.Init.Parity = UART_PARITY_NONE;

    huart2.Init.Mode = UART_MODE_TX_RX;

    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;

    huart2.Init.OverSampling = UART_OVERSAMPLING_16;



    if (HAL_UART_Init(&huart2) != HAL_OK)

    {

        Error_Handler();

    }

}



// 初始化GPIO

static void MX_GPIO_Init(void)

{

    __HAL_RCC_GPIOA_CLK_ENABLE();

}



// 错误处理

void Error_Handler(void)

{

    while (1)

    {

    }

}