ps:把字符串分红字节循环发送
/**阐明：*PA0:KEY1;PA1:KEY2;*PA2:LED1;PA3:LED2;*PA9:USART1_TX;PA10:USART1_RX*/#include "stm32f10x.h" #include "stm32f10x_rcc.h" #include "stm32f10x_gpio.h" #include "stm32f10x_usart.h" #include "stm32f10x_crc.h"#include "system_stm32f10x.h" #include "stdio.h" #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)void RCC_Configuration(void); void GPIO_Configuration(void); void USART_Configuration(void); void delay_ms(u16 time);void UART_PutChar(USART_TypeDef* USARTx, uint8_t Data);void UART_PutStr (USART_TypeDef* USARTx, uint8_t *str);int main(){SystemInit();RCC_Configuration(); GPIO_Configuration(); USART_Configuration(); while(1){printf("\n发送的信息：");UART_PutStr(USART1, "hello world!"); delay_ms(1000); } }void RCC_Configuration(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE); } void GPIO_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //管脚9 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_Init(GPIOA, &GPIO_InitStructure); //TX初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //管脚10 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //上拉输入 GPIO_Init(GPIOA, &GPIO_InitStructure); //RX初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3;//LED GPIO_Pin_All GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); }void USART_Configuration(void)//串口初始化函数 { //串口参数初始化 USART_InitTypeDef USART_InitStructure; //串口设置康复默许参数 //初始化参数设置 USART_InitStructure.USART_BaudRate = 9600; //波特率9600 USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长8位 USART_InitStructure.USART_StopBits = USART_StopBits_1; //1位中止字节 USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无流操控 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//翻开Rx接纳和Tx发送功用 USART_Init(USART1,&USART_InitStructure); //初始化 USART_Cmd(USART1,ENABLE); //发动串口 }void delay_ms(u16 time) { u16 i=0; while(time--) { i=12000; while(i--); } } int putchar(int c) //putchar函数 { if (c == \n){putchar(\r);} //将printf的\n变成\r USART_SendData(USART1, c); //发送字符 while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){} //等候发送完毕 return c; //返回值 } void UART_PutChar(USART_TypeDef* USARTx, uint8_t Data){USART_SendData(USARTx, Data);while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET){}}void UART_PutStr (USART_TypeDef* USARTx, uint8_t *str) { while (0 != *str) { UART_PutChar(USARTx, *str); str++; } }
