发送文本数据实物图：
发送文本数据控制LED点亮：
发送文本数据控制LED熄灭：
发送文本数据错误时：
代码部分如下：
主函数(main.c)代码部分：
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
#include "Serial.h"
#include "LED.h"
#include <string.h>
int main(void)
{
OLED_Init();
OLED_Init();
Serial_Init();
OLED_ShowString(1, 1, "TxPacket");
OLED_ShowString(3, 1, "RxPacket");
//如果连续发送数据包，程序处理不及时，可能导致数据报错位，文本数据包独立，若错位，则全部错。
//因此需要每次都进行判断后处理下一个数据包
while (1)
{
if(Serial_RxFlag == 1)//注：此处与串口收发HEX文件不同，直接使用库函数进行判断
{
OLED_ShowString(4,1," ");
OLED_ShowString(4,1,Serial_RxPacket);//字符串
if(strcmp(Serial_RxPacket,"LED_ON")==0)//strcmp,判断字符串是否相等,需要头文件#include "string.h"
{
LED1_ON();
Serial_SendString("LED_ON_OK\r\n");
OLED_ShowString(2,1," ");
OLED_ShowString(2,1,"LED_ON_OK");
}
else if(strcmp(Serial_RxPacket,"LED_OFF")==0)//strcmp,判断字符串是否相等
{
LED1_OFF();
Serial_SendString("LED_OFF_OK\r\n");
OLED_ShowString(2,1," ");
OLED_ShowString(2,1,"LED_OFF_OK");
}
else
{
Serial_SendString("ERROR_COMMND\r\n");
OLED_ShowString(2,1," ");
OLED_ShowString(2,1,"ERROR_COMMND");
}
Serial_RxFlag = 0;
}
}
}
Serial.c代码部分：
#include "stm32f10x.h" // Device header
#include <stdio.h>
#include <stdarg.h>
char Serial_RxPacket[100];
uint8_t Serial_RxFlag;
//可变包长，含包头包尾，以@符号为包头，空格(\r\n)为包尾,中间载荷不固定
void Serial_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1, &USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(USART1, ENABLE);
}
void Serial_SendByte(uint8_t Byte)
{
USART_SendData(USART1, Byte);
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
void Serial_SendArray(uint8_t *Array, uint16_t Length)
{
uint16_t i;
for (i = 0; i < Length; i ++)
{
Serial_SendByte(Array[i]);
}
}
void Serial_SendString(char *String)
{
uint8_t i;
for (i = 0; String[i] != '\0'; i ++)
{
Serial_SendByte(String[i]);
}
}
uint32_t Serial_Pow(uint32_t X, uint32_t Y)
{
uint32_t Result = 1;
while (Y --)
{
Result *= X;
}
return Result;
}
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 - i - 1) % 10 + '0');
}
}
int fputc(int ch, FILE *f)
{
Serial_SendByte(ch);
return ch;
}
void Serial_Printf(char *format, ...)
{
char String[100];
va_list arg;
va_start(arg, format);
vsprintf(String, format, arg);
va_end(arg);
Serial_SendString(String);
}
void USART1_IRQHandler(void)
{
static uint8_t RxState = 0;
static uint8_t pRxPacket = 0;
if (USART_GetITStatus(USART1, USART_IT_RXNE) == SET)
{
uint8_t RxData = USART_ReceiveData(USART1);
if (RxState == 0)
{
if (RxData == '@'&&Serial_RxFlag==0)//包头是@，Serial_RxFlag==0防止发送太快接收错位。
{
RxState = 1;
pRxPacket = 0;
}
}
else if (RxState == 1)
{
if(RxData=='\r')
{
RxState = 2;
}
else
{
Serial_RxPacket[pRxPacket] = RxData;
pRxPacket ++;
}
}
else if (RxState == 2)
{
if (RxData == '\n')
{
RxState = 0;
Serial_RxPacket[pRxPacket] = '\0';//在字符串最后加结束标志
Serial_RxFlag = 1;
}
}
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
}
Serial.h代码部分：
#ifndef __SERIAL_H
#define __SERIAL_H
#include <stdio.h>
extern char Serial_RxPacket[];
extern uint8_t Serial_RxFlag;
void Serial_Init(void);
void Serial_SendByte(uint8_t Byte);
void Serial_SendArray(uint8_t *Array, uint16_t Length);
void Serial_SendString(char *String);
void Serial_SendNumber(uint32_t Number, uint8_t Length);
#endif