117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
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#include "usart.h"
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unsigned char Serial_RxData;
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unsigned char Serial_RxFlag;
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void Usart_Init(unsigned int BaudRate)
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{
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
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GPIO_InitTypeDef GPIO_InitStruct;
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GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP;
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GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9;
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GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
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GPIO_Init(GPIOA,&GPIO_InitStruct);
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GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IPU;
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GPIO_InitStruct.GPIO_Pin=GPIO_Pin_10;
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GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
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GPIO_Init(GPIOA,&GPIO_InitStruct);
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USART_InitTypeDef USART_InitStruct;
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USART_InitStruct.USART_BaudRate=BaudRate;
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USART_InitStruct.USART_HardwareFlowControl=USART_HardwareFlowControl_None;//不使用流控
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USART_InitStruct.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;//发送接收模式
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USART_InitStruct.USART_Parity=USART_Parity_No;//无校验
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USART_InitStruct.USART_StopBits=USART_StopBits_1;//一位停止位
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USART_InitStruct.USART_WordLength=USART_WordLength_8b;//八位字长
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USART_Init(USART1,&USART_InitStruct);
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USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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NVIC_InitTypeDef NVIC_InitStruct;
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NVIC_InitStruct.NVIC_IRQChannel=USART1_IRQn;
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NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
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NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
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NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
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NVIC_Init(&NVIC_InitStruct);
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USART_Cmd(USART1,ENABLE);
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}
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void Serial_SendByte(unsigned char Byte)
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{
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USART_SendData(USART1,Byte);
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while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==0);
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}
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void Serial_SendArray(unsigned char *Array,unsigned short Length)
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{
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unsigned short i;
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for(i=0;i<Length;i++)
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{
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Serial_SendByte(Array[i]);
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}
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}
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void Serial_SendString(char *string)
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{
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unsigned char i;
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for(i=0;string[i]!='\0';i++)
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{
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Serial_SendByte(string[i]);
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}
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}
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unsigned int Serial_Pow(unsigned int x,unsigned int y)
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{
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unsigned int Result =1;
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while(y--)
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{
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Result *=x;
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}
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return Result;
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}
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void Serial_SendNumber(unsigned int Number,unsigned char Length)
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{
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unsigned char i;
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for(i=0;i<Length;i++)
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{
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Serial_SendByte(Number/Serial_Pow(10,Length-i-1)%10+'0');
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}
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}
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int fputc(int ch,FILE *f)
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{
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Serial_SendByte(ch);
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return ch;
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}
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unsigned char Serial_GetRxFlag(void)
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{
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if(Serial_RxFlag==1)
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{
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Serial_RxFlag=0;
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return 1;
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}
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return 0;
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}
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unsigned char Serial_GetRxData(void)
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{
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return Serial_RxData;
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}
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void USART1_IRQHandler(void)
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{
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if(USART_GetITStatus(USART1,USART_IT_RXNE)==SET)
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{
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Serial_RxData=USART_ReceiveData(USART1);
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Serial_RxFlag=1;
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USART_ClearITPendingBit(USART1,USART_IT_RXNE);
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}
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}
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