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110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
#include "bsp_uart3.h"
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// 串口3 PB10 TX PB11 RX
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void BSP_UART3SendStr(char *ch){
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uint16_t i = 0,j = 0;
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j = strlen(ch);
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for(i = 0;i < j;i++)
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{
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while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET){};
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USART_SendData(USART3,ch[i]);
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}
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while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET);
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}
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// 发送数据
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void BSP_UART3SendData(uint8_t *ch,uint16_t len){
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uint16_t i = 0;
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for(i = 0;i < len;i++)
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{
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while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET){};
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USART_SendData(USART3,ch[i]);
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}
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while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET);
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}
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void BSP_UART3Init(uint32_t bound){
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GPIO_InitTypeDef GPIO_InitStructure;
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USART_InitTypeDef USART_InitStructure;
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NVIC_InitTypeDef NVIC_InitStructure;
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//使能USART3,GPIOB
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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//USART3_TX GPIOB10
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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//USART3_RX GPIOB11
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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//Usart3 NVIC 配置
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 3;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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//USART 初始化设置
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USART_InitStructure.USART_BaudRate = bound;
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USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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USART_InitStructure.USART_StopBits = USART_StopBits_1;
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USART_InitStructure.USART_Parity = USART_Parity_No;
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USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART3, &USART_InitStructure);
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USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//开启串口接受中断
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USART_Cmd(USART3, ENABLE); //使能串口
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}
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// 读取USARTx->SR能避免莫名其妙的错误
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uint8_t Usart3ReadBuf[60] = {0};
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uint16_t Usart3ReadFlag = 0;
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void USART3_IRQHandler(void)
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{
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uint8_t res = 0;
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if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
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{
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res = USART_ReceiveData(USART3);
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// 是否存在数据没有处理
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if( (Usart3ReadFlag&0x8000)==0 )
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{
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Usart3ReadBuf[Usart3ReadFlag] = res;
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Usart3ReadFlag++;
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if(Usart3ReadFlag>=59)
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{
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Usart3ReadFlag |= (1 << 15);
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}
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}
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}
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//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
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if( USART_GetFlagStatus(USART3,USART_FLAG_ORE)==SET )
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{
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USART_ReceiveData(USART3);
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USART_ClearFlag(USART3,USART_FLAG_ORE);
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}
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USART_ClearFlag(USART3,USART_IT_RXNE);
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}
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