6步教你在STM32程序中添加 printf函数

1、6步教你在STM32程序中添加 printf函数6步教你在STM32程序中添加 printf函数 前提是你有一个完整的可以运行的 keil工程 比如ADC的  调试的时候很多时候用到串口 这里教你怎么样使用Printf 函数  在程序中添加Printf.txt 1, #include <stdio.h> 2, /* Private functions -*/ 下添加 void USART_Configuration(void); #ifdef _GNUC_ /* With GCC/RAISONANCE, small printf (optio

2、n LD Linker->Libraries->Small printf      set to 'Yes') calls _io_putchar() */ #define PUTCHAR_PROTOTYPE int _io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif /* _GNUC_ */ 3，添加如下2个函数 usart配置 和 重定向 C库的printf函数 void USART_Configurat

3、ion() /* USARTx configured as follow:         - BaudRate = 9600 baud          - Word Length = 8 Bits         - One Stop Bit         - No parity       

4、  - Hardware flow control disabled (RTS and CTS signals)         - Receive and transmit enabled */ USART_InitTypeDef USART_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; /* Configure USART1 Tx (PA9) as alternate function push-pull */ GPIO_InitStructure.GP

5、IO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure USART1 Rx (PA10) as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_

6、FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); USART_InitStructure.USART_BaudRate = 9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlo

7、wControl = USART_HardwareFlowControl_None; USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(USART1, &USART_InitStructure); /* Enable USART1 */ USART_Cmd(USART1, ENABLE); /* * brief Retargets the C library printf function to the USART. * param None * retval None */ PUTCH

8、AR_PROTOTYPE /* Place your implementation of fputc here */ /* e.g. write a character to the USART */ USART_SendData(USART1, (uint8_t) ch); /* Loop until the end of transmission */ while (USART_GetFlagStatus(USART1, USART_FLAG_TC) = RESET) return ch; 4， void RCC_Configuration(void) 添加  /* E

9、nable GPIOA and USART1 clocks */    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE); 5, STM32F10x.CONF.H  去掉/* #include "stm32f10x_usart.h" */ 的注释 6， 在Main()中添加 void USART_Configuration() 然后就可以在main（）调用  printf("The is a example!" ); printf("%s%c%c%c%c%c%s",            "#*",            Value/256,Value%256,