一、串口一的配置(初始化+中断配置+中断接收函数)
1 /*=============================================================================== 2 Copyright: 3 Version: 4 Author: 5 Date: 2017/11/3 6 Description: 7 配置独立看门狗初始化函数,在主函数中运行IWDG_ReloadCounter进行喂狗主函数必须在4s内进行一次喂狗不然系统会复位; 8 函数功能是将接收固定长度的字符串,并将接收后的字符串通过串口发送出去 9 revise Description: 10 ===============================================================================*/ 11 #include "stm32f10x_usart.h" 12 #include "stm32f10x.h" 13 #include "stm32f10x_iwdg.h" 14 15 u8 USART1_RX_BUF[21]; 16 u8 USART1_RX_CNT=0; 17 18 void IWDG_Configuration(void); 19 20 void Usart1_Init(u32 bound) 21 { 22 //GPIO端口设置 23 GPIO_InitTypeDef GPIO_InitStructure; 24 USART_InitTypeDef USART_InitStructure; 25 NVIC_InitTypeDef NVIC_InitStructure; 26 27 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC, ENABLE);//使能USART1,GPIOA,C时钟 28 29 //USART1_TX GPIOA.9 30 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9 31 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 32 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 33 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9 34 35 //USART1_RX GPIOA.10初始化 36 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10 37 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 38 GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10 39 40 //Usart1 NVIC 配置 41 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级,2位响应优先级 0-3; 42 43 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; 44 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 45 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 46 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能 47 NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器 48 49 //USART 初始化设置 50 51 USART_InitStructure.USART_BaudRate = bound;//串口波特率 52 USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式 53 USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位 54 USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位 55 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制 56 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式 57 58 USART_Init(USART1, &USART_InitStructure); //初始化串口1 59 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断 60 USART_Cmd(USART1, ENABLE); //使能串口1 61 } 62 /** 63 * USART1发送len个字节. 64 * buf:发送区首地址 65 * len:发送的字节数(为了和本代码的接收匹配,这里建议不要超过64个字节) 66 **/ 67 void USART1_Send_Data(u8 *buf,u16 len) 68 { 69 u16 t; 70 GPIO_SetBits(GPIOC,GPIO_Pin_9); 71 // RS485_TX_EN=1; //设置为发送模式 72 for(t=0;t
二、串口二的配置(初始化+中断配置+中断接收函数)
1 /*=============================================================================== 2 Copyright: 3 Version: 4 Author: 5 Date: 2017/11/3 6 Description: 7 函数功能是将接收固定长度的字符串,并将接收后的字符串通过串口发送出去 8 revise Description: 9 ===============================================================================*/ 10 #include "stm32f10x_usart.h" 11 #include "stm32f10x.h" 12 #include "stm32f10x_iwdg.h" 13 14 15 u8 USART2_RX_BUF[250]; 16 u8 USART2_RX_CNT=0; 17 u16 USART2_RX_STA=0; //接收状态标记 18 19 void Usart2_Init(u32 bound) 20 { 21 GPIO_InitTypeDef GPIO_InitStructure; 22 USART_InitTypeDef USART_InitStructure; 23 NVIC_InitTypeDef NVIC_InitStructure; 24 //|RCC_APB2Periph_AFIO 25 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//使能GPIOA时钟 26 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//使能USART2时钟 27 28 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //PA2 29 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽 30 GPIO_Init(GPIOA, &GPIO_InitStructure); 31 32 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//PA3 33 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入 34 GPIO_Init(GPIOA, &GPIO_InitStructure); 35 36 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2,ENABLE);//复位串口2 37 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2,DISABLE);//停止复位 38 39 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置NVIC中断分组2:2位抢占优先级,2位响应优先级 0-3; 40 NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; //使能串口2中断 41 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; //先占优先级2级 42 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级2级 43 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道 44 NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器 45 46 USART_InitStructure.USART_BaudRate = bound;//波特率设置 47 USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8位数据长度 48 USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位 49 USART_InitStructure.USART_Parity = USART_Parity_No;///奇偶校验位 50 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制 51 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收发模式 52 53 USART_Init(USART2, &USART_InitStructure); ; //初始化串口 54 USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启中断 55 USART_Cmd(USART2, ENABLE); //使能串口 56 57 } 58 /** 59 * USART2发送len个字节. 60 * buf:发送区首地址 61 * len:发送的字节数(为了和本代码的接收匹配,这里建议不要超过64个字节) 62 **/ 63 void USART2_Send_Data(u8 *buf,u16 len) 64 { 65 u16 t; 66 for(t=0;t
三、串口三的配置(初始化+中断配置+中断接收函数)
1 /*=============================================================================== 2 Copyright: 3 Version: 4 Author: 5 Date: 2017/11/3 6 Description: 7 函数功能是将接收固定长度的字符串,并将接收后的字符串通过串口发送出去 8 通过滴答定时器方式获取数据 9 revise Description: 10 ===============================================================================*/ 11 #include "stm32f10x_usart.h" 12 #include "stm32f10x.h" 13 14 #define USART3_TIMEOUT_Setting 800 //(ms) 15 16 u8 USART3_RX_BUF[250]; 17 u16 USART3_RX_CNT=0; 18 u16 USART3_RX_TIMEOUT=0; //接收状态标记 19 20 void Timer1CountInitial(void); 21 22 void USART3_Init(u32 baud) 23 { 24 USART_InitTypeDef USART_InitStructure; 25 NVIC_InitTypeDef NVIC_InitStructure; 26 GPIO_InitTypeDef GPIO_InitStructure; //声明一个结构体变量,用来初始化GPIO 27 //使能串口的RCC时钟 28 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE); //使能UART3所在GPIOB的时钟 29 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); 30 31 //串口使用的GPIO口配置 32 // Configure USART3 Rx (PB.11) as input floating 33 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; 34 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; 35 GPIO_Init(GPIOB, &GPIO_InitStructure); 36 37 // Configure USART3 Tx (PB.10) as alternate function push-pull 38 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; 39 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 40 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 41 GPIO_Init(GPIOB, &GPIO_InitStructure); 42 43 //配置串口 44 USART_InitStructure.USART_BaudRate = baud; 45 USART_InitStructure.USART_WordLength = USART_WordLength_8b; 46 USART_InitStructure.USART_StopBits = USART_StopBits_1; 47 USART_InitStructure.USART_Parity = USART_Parity_No; 48 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; 49 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; 50 51 52 // Configure USART3 53 USART_Init(USART3, &USART_InitStructure);//配置串口3 54 // Enable USART3 Receive interrupts 使能串口接收中断 55 USART_ITConfig(USART3, USART_IT_RXNE, ENABLE); 56 // Enable the USART3 57 USART_Cmd(USART3, ENABLE);//使能串口3 58 59 //串口中断配置 60 //Configure the NVIC Preemption Priority Bits 61 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); 62 63 // Enable the USART3 Interrupt 64 NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; 65 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 66 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级3 67 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 68 NVIC_Init(&NVIC_InitStructure); 69 70 } 71 72 void USART3_Sned_Char(u8 temp) 73 { 74 USART_SendData(USART3,(u8)temp); 75 while(USART_GetFlagStatus(USART3,USART_FLAG_TXE)==RESET); 76 77 } 78 79 void USART3_Sned_Char_Buff(u8 buf[],u32 len) 80 { 81 u32 i; 82 for(i=0;i
四、串口四的配置(初始化+中断配置+中断接收函数)
注意串口四的中断优先级没有贴出来,和前面的三个一样的配置,为了不占用过多的篇幅就不贴中断优先级配置了
1 /*=============================================================================== 2 Copyright: 3 Version: 4 Author: 5 Date: 2017/11/3 6 Description: 7 函数功能是将接收固定长度的字符串,并将接收后的字符串通过串口发送出去 8 通过滴答定时器方式获取数据 9 revise Description: 10 ===============================================================================*/ 11 #include "stm32f10x_usart.h" 12 #include "stm32f10x.h" 13 14 #define USART4_TIMEOUT_Setting 800 //(ms) 15 16 u8 USART4_RX_BUF[250]; 17 u16 USART4_RX_CNT=0; 18 u16 USART2_RX_STA=0; //接收状态标记 19 20 void Systick_delay_init(u8 SYSCLK); 21 u8 virtual_delay(u32 num,u8 unit); 22 23 //通用异步收发器UART4 24 void UART4_Init(u32 bound) 25 { 26 USART_InitTypeDef USART_InitStructure; 27 GPIO_InitTypeDef GPIO_InitStructure; 28 29 //used for USART3 full remap 30 //GPIO_PinRemapConfig(GPIO_FullRemap_USART3, ENABLE); 31 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE); 32 RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);//for UART4 33 34 //Configure RS485_TX_EN PIN 35 GPIO_InitStructure.GPIO_Pin = RS485_TX_EN_PIN; //PC9端口配置 36 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 37 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 38 GPIO_Init(RS485_TX_EN_PORT, &GPIO_InitStructure); 39 40 RS485_TX_EN=0; //设置485默认为接收模式 41 42 /* Configure USART Tx as alternate function push-pull */ 43 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; 44 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 45 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 46 GPIO_Init(GPIOC, &GPIO_InitStructure); 47 48 /* Configure USART Rx as input floating */ 49 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; 50 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; 51 GPIO_Init(GPIOC, &GPIO_InitStructure); 52 53 54 USART_InitStructure.USART_BaudRate = bound; 55 USART_InitStructure.USART_WordLength = USART_WordLength_8b; 56 USART_InitStructure.USART_StopBits = USART_StopBits_1; 57 USART_InitStructure.USART_Parity = USART_Parity_No ; 58 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; 59 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; 60 61 USART_Init(UART4, &USART_InitStructure); 62 //USART_Init(USART3, &USART_InitStructure); 63 /* Enable the USART */ 64 USART_Cmd(UART4, ENABLE); 65 USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);//开启串口接受中断 66 USART_ClearFlag(UART4,USART_FLAG_TC); 67 } 68 //USART1查询接收到的数据 69 //buf:接收缓存首地址 70 //len:读到的数据长度 71 void UART4_Receive_Data(u8 *buf) 72 { 73 u8 rxlen=21; 74 u8 i=0; 75 delay_ms(10); //等待10ms,连续超过10ms没有接收到一个数据,则认为接收结束 76 77 RS485_RX_FLAG = 0; 78 if((UART4_RX_BUF[0]==0x01)&&(UART4_RX_BUF[1]==0x03)) 79 { 80 for(i=0;iDR); //读取接收到的数据 133 UART4_RX_BUF[UART4_RX_CNT&0XFF]=Res; //回传的数据存入数组,0X3F限制为64个数值 134 UART4_RX_CNT++; 135 USART2_RX_STA=1; 136 } 137 138 if( USART_GetITStatus(UART4, USART_IT_TC) == SET ) 139 { 140 USART_ClearFlag(UART4, USART_FLAG_TC); 141 } 142 //溢出-如果发生溢出需要先读SR,再读DR寄存器则可清除不断入中断的问题 143 if(USART_GetFlagStatus(UART4,USART_FLAG_ORE) == SET) 144 { 145 USART_ReceiveData(UART4); 146 USART_ClearFlag(UART4,USART_FLAG_ORE); 147 } 148 // USART_ITConfig(UART4, USART_IT_RXNE, DISABLE);//临时关闭接收中断 149 USART_ClearFlag(UART4,USART_IT_RXNE); //一定要清除接收中断 150 151 } 152 153 //初始化延迟函数 154 //SYSTICK的时钟固定为HCLK时钟的1/8 155 //SYSCLK:系统时钟 156 void Systick_delay_init(u8 SYSCLK) 157 { 158 SysTick->CTRL&=0xfffffffb;//bit2清空,选择外部时钟 HCLK/8 159 // SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8); //选择外部时钟 HCLK/8 160 fac_us=SYSCLK/8; 161 fac_ms=(u16)fac_us*1000; 162 } 163 /*=============================================================================== 164 Author:peter pan 165 Date: 166 Description: 查询式分时或叫做轮询式(近似延时)。本函数是用于执行高效率场合的查询延时,但是一个for or while 循环中只能用一次。 167 revise Description: 168 @ num : //分时查询的周期计数值 169 @ unit : //分时查询的周期单位 170 @@ParaValue : 171 MS //周期单位为MS毫秒级 172 US //周期单位为US微秒级 173 @ virtual_delay_status : //静态变量 174 @@ParaValue : 175 SET //SYSTICK正在占用中,请勿用 176 RESET //SYSTICK空闲,可以使用 177 @ReValue : 178 with zero mean Time non-arrive ,one representative Time arrived ,you can do task; 179 ##example if(virtual_delay(1000,MS)) LedFlash(); //1000ms LED闪烁一下 180 ===============================================================================*/ 181 u8 virtual_delay(u32 num,u8 unit) 182 { 183 u32 temp; 184 if(virtual_delay_status==RESET) // SYSTICK空闲,可以使用 185 { 186 if(unit==MS) 187 { 188 SysTick->LOAD=(u32)num*Delay_SYSCLK*125;//时间加载(SysTick->LOAD为24bit) 189 SysTick->VAL =0x00; //清空计数器 190 SysTick->CTRL=0x01 ; //开始倒数 191 }else if(unit==US) 192 { 193 SysTick->LOAD=num*Delay_SYSCLK/8; //时间加载 194 SysTick->VAL=0x00; //清空计数器 195 SysTick->CTRL=0x01 ; //开始倒数 196 } 197 virtual_delay_status=SET; 198 return 0; 199 } 200 else 201 { //virtual_delay_status==SET SYSTICK被占用 202 203 temp=SysTick->CTRL; 204 if(!(temp&0x01&&!(temp&(1<<16))))//等待时间到达 205 { 206 SysTick->CTRL=0x00; //关闭计数器 207 SysTick->VAL =0X00; //清空计数器 208 virtual_delay_status=RESET; 209 return 1; 210 }else return 0; 211 } 212 }