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https://gitee.com/beecue/fastbee.git
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112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
#include "bsp_uart2.h"
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// 串口2 PA2 TX PA3 RX
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void Dev_UART2SendStr(char* fmt,...){
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uint8_t tbuf[200] = {0};
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uint16_t i = 0,j = 0;
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va_list ap;
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va_start(ap,fmt);
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vsprintf((char*)tbuf, fmt, ap);
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va_end(ap);
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j = strlen((const char*)tbuf);
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for( i = 0; i < j; i++)
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{
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while(USART_GetFlagStatus(USART2, USART_FLAG_TC)==RESET){};
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USART_SendData(USART2, tbuf[i]);
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}
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while(USART_GetFlagStatus(USART2, USART_FLAG_TC)==RESET);
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}
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// 发送数据
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void Dev_UART2SendData(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(USART2,USART_FLAG_TC)==RESET){};
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USART_SendData(USART2,ch[i]);
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}
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while(USART_GetFlagStatus(USART2,USART_FLAG_TC)==RESET);
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}
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void BSP_UART2Init(uint32_t bound)
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{
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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USART,GPIO
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
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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(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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// NVIC 配置
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 3;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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// USART 配置
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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(USART2, &USART_InitStructure);
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USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启串口接受中断
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USART_Cmd(USART2, 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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void USART2_IRQHandler(void)
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{
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uint8_t res = 0;
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if(USART_GetITStatus(USART2, USART_IT_RXNE)!=RESET)
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{
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res = USART_ReceiveData(USART2);
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// 是否存在数据没有处理
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if( (UART2ReadFlag&0x8000)==0 )
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{
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UART2ReadBuf[UART2ReadFlag++] = res;
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if(UART2ReadFlag>=90)
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{
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UART2ReadFlag |= (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(USART2, USART_FLAG_ORE)==SET )
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{
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USART_ReceiveData(USART2);
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USART_ClearFlag(USART2, USART_FLAG_ORE);
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}
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USART_ClearFlag(USART2, USART_IT_RXNE);
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}
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