#include "stm32l0xx_hal.h" #include "usart.h" #include #include #ifdef __GNUC__ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif UART_HandleTypeDef UartHandle; PUTCHAR_PROTOTYPE { UartHandle.Instance->TDR = ch & 0x01FF; //USART2->TDR = ch & 0x01FF; while (__HAL_USART_GET_FLAG(&UartHandle, USART_FLAG_TC) == RESET) {} //while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET) {} return ch; } // void usart_init(void) { GPIO_InitTypeDef GPIO_InitStruct; HAL_UART_DeInit(&UartHandle); __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_USART2_CLK_ENABLE(); GPIO_InitStruct.Pin = GPIO_PIN_2; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH; GPIO_InitStruct.Alternate = GPIO_AF4_USART2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Alternate = GPIO_AF4_USART2; HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); UartHandle.Instance = USART2; UartHandle.Init.BaudRate = 115200; UartHandle.Init.WordLength = UART_WORDLENGTH_8B; UartHandle.Init.StopBits = UART_STOPBITS_1; UartHandle.Init.Parity = UART_PARITY_NONE; UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE; UartHandle.Init.Mode = UART_MODE_TX_RX; HAL_UART_Init(&UartHandle); } // void HAL_UART_MspDeInit(UART_HandleTypeDef *huart) { if (huart->Instance == USART2) { __HAL_RCC_USART2_FORCE_RESET(); __HAL_RCC_USART2_RELEASE_RESET(); HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2); HAL_GPIO_DeInit(GPIOA, GPIO_PIN_3); } }