桂林 网站建设,wordpress 自定义栏目 图片,查询网站开发的端口,外贸推广网站00. 目录 文章目录 00. 目录01. 串口简介02. 串口收发HEX数据包接线图03. 串口收发HEX数据包示例104. 串口收发HEX数据包示例205. 串口收发文本数据包接线图06. 串口收发文本数据包示例07. 程序示例下载08. 附录 01. 串口简介
串口通讯(Serial Communication)是一种设备间非常…00. 目录 文章目录 00. 目录01. 串口简介02. 串口收发HEX数据包接线图03. 串口收发HEX数据包示例104. 串口收发HEX数据包示例205. 串口收发文本数据包接线图06. 串口收发文本数据包示例07. 程序示例下载08. 附录 01. 串口简介
串口通讯(Serial Communication)是一种设备间非常常用的串行通讯方式因为它简单便捷因此大部分电子设备都支持该通讯方式 电子工程师在调试设备时也经常使用该通讯方式输出调试信息。
在计算机科学里大部分复杂的问题都可以通过分层来简化。如芯片被分为内核层和片上外设STM32标准库则是在寄存器与用户代码之间的软件层。 对于通讯协议我们也以分层的方式来理解最基本的是把它分为物理层和协议层。物理层规定通讯系统中具有机械、电子功能部分的特性 确保原始数据在物理媒体的传输。协议层主要规定通讯逻辑统一收发双方的数据打包、解包标准。 简单来说物理层规定我们用嘴巴还是用肢体来交流协议层则规定我们用中文还是英文来交流。
02. 串口收发HEX数据包接线图 03. 串口收发HEX数据包示例1
uart.h
#ifndef __UART_H__
#define __UART_H__#include stm32f10x.h extern uint8_t recvPacket[];void uart_init(void);void uart_send_byte(uint8_t byte);void uart_send_array(uint8_t *arr, uint16_t len);void uart_send_string(char *str);void uart_send_number(uint32_t num, uint8_t len);void uart_printf(char *format, ...);uint8_t uart_getRxFlag(void);uint8_t uart_getRxData(void);void uart_send_packet(uint8_t arr[], int len);#endif /**/
uart.c
#include uart.h#include stdio.h
#include stdarg.huint8_t recvData;
uint8_t recvFlag;uint8_t recvPacket[32];void uart_init(void)
{GPIO_InitTypeDef GPIO_InitStruct;USART_InitTypeDef USART_InitStruct;NVIC_InitTypeDef NVIC_InitStruct;RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//GPIO初始化 PA9 TXGPIO_InitStruct.GPIO_Mode GPIO_Mode_AF_PP;GPIO_InitStruct.GPIO_Pin GPIO_Pin_9;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOA, GPIO_InitStruct);//GPIO初始化 PA10 RXGPIO_InitStruct.GPIO_Mode GPIO_Mode_IPU;GPIO_InitStruct.GPIO_Pin GPIO_Pin_10;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOA, GPIO_InitStruct);USART_InitStruct.USART_BaudRate 9600;USART_InitStruct.USART_HardwareFlowControl USART_HardwareFlowControl_None;USART_InitStruct.USART_Mode USART_Mode_Tx | USART_Mode_Rx;USART_InitStruct.USART_Parity USART_Parity_No;USART_InitStruct.USART_StopBits USART_StopBits_1;USART_InitStruct.USART_WordLength USART_WordLength_8b;USART_Init(USART1, USART_InitStruct);//设置串口中断USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//设置中断分组NVIC_InitStruct.NVIC_IRQChannel USART1_IRQn;NVIC_InitStruct.NVIC_IRQChannelCmd ENABLE;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority 1;NVIC_InitStruct.NVIC_IRQChannelSubPriority 1;NVIC_Init(NVIC_InitStruct);USART_Cmd(USART1, ENABLE);
}void uart_send_byte(uint8_t byte)
{USART_SendData(USART1, byte);while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) RESET);
}void uart_send_array(uint8_t *arr, uint16_t len)
{uint16_t i;for (i 0; i len; i){uart_send_byte(arr[i]);}
}void uart_send_string(char *str)
{uint16_t i 0;while(*(str i) ! \0){uart_send_byte(str[i]);i;}
}//x的y次方
uint32_t uart_pow(uint32_t x, uint32_t y)
{uint32_t result 1;while(y){result * x;y--;}return result;
}void uart_send_number(uint32_t num, uint8_t len)
{uint8_t i;for (i 0; i len; i){uart_send_byte(num / uart_pow(10, len - i - 1) % 10 0);}}int fputc(int ch, FILE *fp)
{uart_send_byte(ch);return ch;
}void uart_printf(char *format, ...)
{char str[128];va_list arg;va_start(arg, format);vsprintf(str, format, arg);va_end(arg);uart_send_string(str);
}void USART1_IRQHandler(void)
{static uint8_t recvState 0;static uint8_t i 0;if (USART_GetITStatus(USART1, USART_IT_RXNE) SET){recvData USART_ReceiveData(USART1);//状态机if (0 recvState){if (recvData 0xFF){recvState 1;i 0;}}else if (1 recvState){recvPacket[i] recvData;i;if (i 4){recvState 2;}} else if (2 recvState){if (recvData 0xFE){i 0;recvState 0;recvFlag 1;}}USART_ClearITPendingBit(USART1, USART_IT_RXNE);}}uint8_t uart_getRxFlag(void)
{if (1 recvFlag){recvFlag 0;return 1;}return 0;
}uint8_t uart_getRxData(void)
{return recvData;
}//发送HEX报文数据
void uart_send_packet(uint8_t arr[], int len)
{//发送报文 FFuart_send_byte(0xFF);uart_send_array(arr, len);//发送报尾uart_send_byte(0xFE);
}main.c
#include stm32f10x.h
#include stdio.h
#include delay.h
#include oled.h
#include uart.hint main(void){ uint8_t arr[] {0x1, 0x2, 0x3, 0x4};OLED_Init();uart_init();//中断分组NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);OLED_ShowChar(1, 1, A);uart_send_packet(arr, 4);while(1){if (1 uart_getRxData()){OLED_ShowHexNum(1, 1, recvPacket[0], 2);OLED_ShowHexNum(1, 4, recvPacket[1], 2);OLED_ShowHexNum(1, 7, recvPacket[2], 2);OLED_ShowHexNum(1, 10, recvPacket[3], 2); } }return 0;}
04. 串口收发HEX数据包示例2
uart.h
#ifndef __UART_H__
#define __UART_H__#include stm32f10x.h extern uint8_t recvPacket[];void uart_init(void);void uart_send_byte(uint8_t byte);void uart_send_array(uint8_t *arr, uint16_t len);void uart_send_string(char *str);void uart_send_number(uint32_t num, uint8_t len);void uart_printf(char *format, ...);uint8_t uart_getRxFlag(void);uint8_t uart_getRxData(void);void uart_send_packet(uint8_t arr[], int len);#endif /**/
uart.c
#include uart.h#include stdio.h
#include stdarg.huint8_t recvData;
uint8_t recvFlag;uint8_t recvPacket[32];void uart_init(void)
{GPIO_InitTypeDef GPIO_InitStruct;USART_InitTypeDef USART_InitStruct;NVIC_InitTypeDef NVIC_InitStruct;RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//GPIO初始化 PA9 TXGPIO_InitStruct.GPIO_Mode GPIO_Mode_AF_PP;GPIO_InitStruct.GPIO_Pin GPIO_Pin_9;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOA, GPIO_InitStruct);//GPIO初始化 PA10 RXGPIO_InitStruct.GPIO_Mode GPIO_Mode_IPU;GPIO_InitStruct.GPIO_Pin GPIO_Pin_10;GPIO_InitStruct.GPIO_Speed GPIO_Speed_50MHz;GPIO_Init(GPIOA, GPIO_InitStruct);USART_InitStruct.USART_BaudRate 9600;USART_InitStruct.USART_HardwareFlowControl USART_HardwareFlowControl_None;USART_InitStruct.USART_Mode USART_Mode_Tx | USART_Mode_Rx;USART_InitStruct.USART_Parity USART_Parity_No;USART_InitStruct.USART_StopBits USART_StopBits_1;USART_InitStruct.USART_WordLength USART_WordLength_8b;USART_Init(USART1, USART_InitStruct);//设置串口中断USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//设置中断分组NVIC_InitStruct.NVIC_IRQChannel USART1_IRQn;NVIC_InitStruct.NVIC_IRQChannelCmd ENABLE;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority 1;NVIC_InitStruct.NVIC_IRQChannelSubPriority 1;NVIC_Init(NVIC_InitStruct);USART_Cmd(USART1, ENABLE);
}void uart_send_byte(uint8_t byte)
{USART_SendData(USART1, byte);while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) RESET);
}void uart_send_array(uint8_t *arr, uint16_t len)
{uint16_t i;for (i 0; i len; i){uart_send_byte(arr[i]);}
}void uart_send_string(char *str)
{uint16_t i 0;while(*(str i) ! \0){uart_send_byte(str[i]);i;}
}//x的y次方
uint32_t uart_pow(uint32_t x, uint32_t y)
{uint32_t result 1;while(y){result * x;y--;}return result;
}void uart_send_number(uint32_t num, uint8_t len)
{uint8_t i;for (i 0; i len; i){uart_send_byte(num / uart_pow(10, len - i - 1) % 10 0);}}int fputc(int ch, FILE *fp)
{uart_send_byte(ch);return ch;
}void uart_printf(char *format, ...)
{char str[128];va_list arg;va_start(arg, format);vsprintf(str, format, arg);va_end(arg);uart_send_string(str);
}void USART1_IRQHandler(void)
{static uint8_t recvState 0;static uint8_t i 0;if (USART_GetITStatus(USART1, USART_IT_RXNE) SET){uint8_t recvData1 USART_ReceiveData(USART1);//状态机if (0 recvState){if (recvData1 0xFF){recvState 1;i 0;}}else if (1 recvState){recvPacket[i] recvData1;i;if (i 4){recvState 2;}} else if (2 recvState){if (recvData1 0xFE){recvState 0;recvFlag 1;}}USART_ClearITPendingBit(USART1, USART_IT_RXNE);}
}uint8_t uart_getRxFlag(void)
{if (1 recvFlag){recvFlag 0;return 1;}return 0;
}uint8_t uart_getRxData(void)
{return recvData;
}//发送HEX报文数据
void uart_send_packet(uint8_t arr[], int len)
{//发送报文 FFuart_send_byte(0xFF);uart_send_array(arr, len);//发送报尾uart_send_byte(0xFE);
}main.c
#include stm32f10x.h
#include stdio.h
#include delay.h
#include oled.h
#include uart.h
#include key.hint main(void){ uint8_t arr[] {0x1, 0x2, 0x3, 0x4};//中断分组NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);key_init();uart_init();OLED_Init();OLED_ShowString(1, 1, TxPacket);OLED_ShowString(3, 1, RxPacket);while(1){if (1 key_scan()){arr[0];arr[1]; arr[2];arr[3];uart_send_packet(arr, 4); OLED_ShowHexNum(2, 1, arr[0], 2);OLED_ShowHexNum(2, 4, arr[1], 2);OLED_ShowHexNum(2, 7, arr[2], 2);OLED_ShowHexNum(2, 10, arr[3], 2); } if (1 uart_getRxData()){OLED_ShowHexNum(4, 1, recvPacket[0], 2);OLED_ShowHexNum(4, 4, recvPacket[1], 2);OLED_ShowHexNum(4, 7, recvPacket[2], 2);OLED_ShowHexNum(4, 10, recvPacket[3], 2); } }return 0;}05. 串口收发文本数据包接线图 06. 串口收发文本数据包示例
uart.h
#ifndef __SERIAL_H
#define __SERIAL_H#include stdio.hextern uint8_t Serial_TxPacket[];
extern uint8_t 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);
void Serial_Printf(char *format, ...);void Serial_SendPacket(void);#endif
uart.c
#include stm32f10x.h // Device header
#include stdio.h
#include stdarg.huint8_t Serial_TxPacket[4]; //FF 01 02 03 04 FE
char Serial_RxPacket[100];
uint8_t Serial_RxFlag;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 Serial_SendPacket(void)
{Serial_SendByte(0xFF);Serial_SendArray(Serial_TxPacket, 4);Serial_SendByte(0xFE);
}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 0 Serial_RxFlag){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;Serial_RxFlag 1;}}USART_ClearITPendingBit(USART1, USART_IT_RXNE);}
}
main.c
#include stm32f10x.h // Device header
#include Delay.h
#include OLED.h
#include Serial.h
#include LED.h#include string.hint main(void)
{OLED_Init();LED_Init();Serial_Init();OLED_ShowString(1, 1, TxPacket);OLED_ShowString(3, 1, RxPacket);while (1){if (Serial_RxFlag 1){OLED_ShowString(4, 1, );OLED_ShowString(4, 1, Serial_RxPacket);if (strcmp(Serial_RxPacket, LED_ON) 0){LED1_ON();OLED_ShowString(2, 1, );OLED_ShowString(2, 1, LED_ON_OK);Serial_SendString(LED_ON_OK\r\n);}else if (strcmp(Serial_RxPacket, LED_OFF) 0){LED1_OFF();OLED_ShowString(2, 1, );OLED_ShowString(2, 1, LED_OFF_OK); Serial_SendString(LED_OFF_OK\r\n); }else{OLED_ShowString(2, 1, );OLED_ShowString(2, 1, ERROR_COMMAND); Serial_SendString(ERROR_COMMAND\r\n); }Serial_RxFlag 0;}}
}
07. 程序示例下载
24-UART收发HEX数据包
25-UART收发HEX数据包2.rar
26-UART收发文本数据包.rar
08. 附录
参考: 【STM32】江科大STM32学习笔记汇总
