Stm32_标准库_12_串口_发送数据

波特率：约定的传输速率，1000bps,1s发1000位

引脚

结构

数据帧的传输特点

代码：

#include "stm32f10x.h"    // Device header
#include "Delay.h"
#include "OLED.h"

GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART_InitStruture;

void Serial_Init(void){
	   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//开启USART1的时钟
	   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//开启GPIOA的时钟
	  
	   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出
	   GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;//TX
	   GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
	   GPIO_Init(GPIOA, &GPIO_InitStruct);
     //初始化USART
	   USART_InitStruture.USART_BaudRate = 9600;//波特率
	   USART_InitStruture.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//不使用
	   USART_InitStruture.USART_Mode = USART_Mode_Tx;//需要发送功能
	   USART_InitStruture.USART_Parity = USART_Parity_No;//不需要校验位
	   USART_InitStruture.USART_StopBits = USART_StopBits_1;//停止位1
	   USART_InitStruture.USART_WordLength = USART_WordLength_8b;//八位字长
	   USART_Init(USART1, &USART_InitStruture);
	
	   USART_Cmd(USART1, ENABLE);
}
 

void Serial_SendByte(uint8_t Byte){
	   USART_SendData(USART1, Byte);//传递数据至TDR
	   while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);//等待TDR数据传送完
}
 
 
int main(void){
	Serial_Init();
	Serial_SendByte(0x41);
	while(1){
		     
	}
}
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效果：

扩充函数

void Serial_SendByte(uint8_t Byte){
	   USART_SendData(USART1, Byte);//传递数据至TDR
	   while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);//等待TDR数据传送完
}

uint32_t Serial_Pow(uint32_t x, uint32_t y){
	       uint32_t result = 1;
	       while(y --){
					    result = result * x;
				 }
				 return result;
}

void Serial_SendArray(uint8_t *Array, uint16_t length){//传输数组
	   uint16_t i = 0;
	   for(i = 0; i < length; i ++){
			   Serial_SendByte(Array[i]);
		 }
}

void Serial_SendString(char *String){//传输字符串
	   uint8_t i;
	   for(i = 0; String[i] != '\0'; i ++){
			   Serial_SendByte(String[i]); 
		 }
}

void Serial_SendNumber(uint32_t Number, uint8_t length){
	   uint8_t i;
	   for(i = 0; i < length; i ++){
			   Serial_SendByte(Number / Serial_Pow(10, length - 1 - i) %10 + '0');//拆分成字符发送
		 }
}
int fputc(int ch, FILE *f){
	   Serial_SendByte(ch); 
	   return ch;
}
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完整代码：

#include "stm32f10x.h"    // Device header
#include "Delay.h"
#include "OLED.h"
#include 


GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART_InitStruture;

void Serial_Init(void){
	   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//开启USART1的时钟
	   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//开启GPIOA的时钟
	  
	   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出
	   GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;//TX
	   GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
	   GPIO_Init(GPIOA, &GPIO_InitStruct);
     //初始化USART
	   USART_InitStruture.USART_BaudRate = 9600;//波特率
	   USART_InitStruture.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//不使用
	   USART_InitStruture.USART_Mode = USART_Mode_Tx;//需要发送功能
	   USART_InitStruture.USART_Parity = USART_Parity_No;//不需要校验位
	   USART_InitStruture.USART_StopBits = USART_StopBits_1;//停止位1
	   USART_InitStruture.USART_WordLength = USART_WordLength_8b;//八位字长
	   USART_Init(USART1, &USART_InitStruture);
	
	   USART_Cmd(USART1, ENABLE);
}
 

void Serial_SendByte(uint8_t Byte){
	   USART_SendData(USART1, Byte);//传递数据至TDR
	   while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);//等待TDR数据传送完
}

uint32_t Serial_Pow(uint32_t x, uint32_t y){
	       uint32_t result = 1;
	       while(y --){
					    result = result * x;
				 }
				 return result;
}

void Serial_SendArray(uint8_t *Array, uint16_t length){//传输数组
	   uint16_t i = 0;
	   for(i = 0; i < length; i ++){
			   Serial_SendByte(Array[i]);
		 }
}

void Serial_SendString(char *String){//传输字符串
	   uint8_t i;
	   for(i = 0; String[i] != '\0'; i ++){
			   Serial_SendByte(String[i]); 
		 }
}

void Serial_SendNumber(uint32_t Number, uint8_t length){
	   uint8_t i;
	   for(i = 0; i < length; i ++){
			   Serial_SendByte(Number / Serial_Pow(10, length - 1 - i) %10 + '0');//拆分成字符发送
		 }
}
int fputc(int ch, FILE *f){
	   Serial_SendByte(ch); 
	   return ch;
}
 
int main(void){
	uint8_t a[] = {0x42, 0x43, 0x44, 0x45};
	Serial_Init();
	Serial_SendByte(0x41);
	 
	Serial_SendArray(a, 4);
	Serial_SendString("hello");//程序自动补结束符
	Serial_SendNumber(123, 3);
	printf("NUm = %d\r\n", 666);
	while(1){
		     
	}
}

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