由于keil涉及到版权问题，因此使用arm-gcc-makefile开发stm32。使用正点原子探索者实现如下功能：1.按下按键KEY0,点亮LED0,串口1打印出 I am Chinese 换行，串口1打印出 点亮LED0 换行。
2.按下按键KEY1,点亮LED1,串口1打印出 点亮LED1 换行。
3.按下按键KEY2,熄灭LED0、LED1,串口1打印出 熄灭所有LED灯 换行。
4.按下按键WKUP,改变LED0、LED1灯的状态，串口1打印出 改变LED灯的状态 换行。
使用cubemx自动生成的makefile，编译没有报错，下载到开发板中如下现象：
1.按下按键KEY0,点亮LED0,串口1打印出 I am Chinese 换行，串口1没有打印出 点亮LED0 。
2.按下按键KEY1,点亮LED1,串口1没有打印出 点亮LED1 。
3.按下按键KEY2,熄灭LED0、LED1,串口1没有打印出 熄灭所有LED灯 。
4.按下按键WKUP,改变LED0、LED1灯的状态，串口1没有打印出 改变LED灯的状态 。
由上述现象结合代码可知按键、LED灯、串口底层驱动都没问题，就是arm-gcc-makefile不支持printf函数。
代码如下：
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the &quot;License&quot;; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include &quot;main.h&quot;
#include &quot;usart.h&quot;
#include &quot;gpio.h&quot;
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include &quot;key.h&quot;
#include <stdio.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
int fputc(int ch, FILE* stream)
{
HAL_UART_Transmit(&huart1 , (unsigned char *)&ch, 1, 0xFFFF);
return ch;
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
unsigned char key;
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
key=KEY_Scan(0);
if(key==KEY0_PRES)
{
HAL_GPIO_WritePin(LED0_GPIO_Port,LED0_Pin,GPIO_PIN_RESET);
HAL_UART_Transmit(&huart1, &quot;I am Chinese
&quot;, sizeof(&quot;I am Chinese
&quot;), 0xFFFF);
printf(&quot;点亮LED0
&quot;);
}
else if(key==KEY1_PRES)
{
HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin,GPIO_PIN_RESET);
printf(&quot;点亮LED1
&quot;);
}
else if(key==KEY2_PRES)
{
HAL_GPIO_WritePin(LED0_GPIO_Port,LED0_Pin,GPIO_PIN_SET);
HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin,GPIO_PIN_SET);
printf(&quot;熄灭所有LED灯
&quot;);
}
else if(key==WKUP_PRES)
{
HAL_GPIO_TogglePin(LED0_GPIO_Port,LED0_Pin);
HAL_GPIO_TogglePin(LED1_GPIO_Port,LED1_Pin);
printf(&quot;改变LED灯的状态
&quot;);
}
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 168;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 4;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
tex: printf(&quot;Wrong parameters value: file %s on line %d
&quot;, file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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