#include "sys.h"
#include "USART.h"
//printf默认是向串口UART2发送数据
#if 1
#pragma import(__use_no_semihosting)
struct __FILE
{
int handle;
};
FILE __stdout;
void _sys_exit(int x)
{
x = x;
}
//printf函数自动调用USART2的发送函数，也可以调用USART2_SendData(BUF);
int fputc(int ch, FILE *f)
{
while((USART2->SR&0X40)==0);
USART2->DR = (u8) ch;
return ch;
}
#endif
//初始化IO USART1
void USART1_Init(u32 BaudRate)
{
//GPIO端口设置
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//使能USART1时钟
//串口1对应引脚复用映射
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9复用为USART1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10复用为USART1
//USART1端口配置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9与GPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
GPIO_Init(GPIOA,&GPIO_InitStructure); //初始化PA9，PA10
//USART1 初始化设置
USART_InitStructure.USART_BaudRate = BaudRate; //波特率设置
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1; //一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_Cmd(USART1, ENABLE); //使能串口1
// USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART1_RX
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启相关中断
//Usart1 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //串口1中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3; //抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
#endif
}
//发送的数据必须是0x0d 0x0a结尾
void USART1_SendData(char BUF[USART_REC_LEN])
{
unsigned int i =0;
char SendFlag = 0;
for(i = 0; i < 200; i++)
{
while(!USART_GetFlagStatus(USART1,USART_FLAG_TXE));
USART_SendData(USART1,BUF[i]);
if(SendFlag == 1)
{
if(BUF[i] != 0x0A)SendFlag = 0;
else
{
SendFlag = 2;
break;
}
}
else
if(BUF[i] == 0x0D)SendFlag = 1;
}
}
//初始化USART2的IO口
void USART2_Init(u32 BaudRate)
{
//GPIO端口设置
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //使能GPIOA时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//使能USART2时钟
//串口2对应引脚复用映射
GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_USART2); //GPIOA2复用为USART2
GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_USART2); //GPIOA3复用为USART2
//USART2端口配置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; //GPIOA2与GPIOA3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //速度50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
GPIO_Init(GPIOA,&GPIO_InitStructure); //初始化PA2，PA3
//USART2 初始化设置
USART_InitStructure.USART_BaudRate = BaudRate;//波特率设置
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
USART_Init(USART2, &USART_InitStructure); //初始化串口2
USART_Cmd(USART2, ENABLE); //使能串口2
//USART_ClearFlag(USART2, USART_FLAG_TC);
#if EN_USART2_RX
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//开启相关中断
//Usart2 NVIC 配置
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//串口2中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;//抢占优先级2
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //子优先级2
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
#endif
}
//发送的数据必须是0x0d 0x0a结尾
void USART2_SendData(char BUF[USART_REC_LEN])
{
unsigned int i =0;
char SendFlag = 0;
for(i = 0; i < 200; i++)
{
while(!USART_GetFlagStatus(USART2,USART_FLAG_TXE));
USART_SendData(USART2,BUF[i]);
if(SendFlag == 1)
{
if(BUF[i] != 0x0A)SendFlag = 0;
else
{
SendFlag = 2;
break;
}
}
else
if(BUF[i] == 0x0D)SendFlag = 1;
}
}
u16 Command = 0;
void USART_SendBack(void)
{
if(USART2_RX_STA&0x8000)
{
int len=USART2_RX_STA&0x3fff;//得到此次接收到的数据长度
// printf("\r\n您发送的消息长度为:%d\r\n",len);
for(int t=0;t<len;t++)
{
USART_SendData(USART1, USART2_RX_BUF[t]); //向串口1发送数据
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)!=SET);//等待发送结束
}
// printf("\r\n");
Command = USART2_RX_BUF[0];
Command <<= 8;
Command = Command + USART2_RX_BUF[1];
USART2_RX_STA=0;
}
if(USART1_RX_STA&0x8000)
{
int len=USART1_RX_STA&0x3fff;//得到此次接收到的数据长度
// printf("\r\n您发送的消息长度为:%d\r\n",len);
for(int t=0;t<len;t++)
{
USART_SendData(USART2, USART1_RX_BUF[t]); //向串口1发送数据
while(USART_GetFlagStatus(USART2,USART_FLAG_TC)!=SET);//等待发送结束
}
// printf("\r\n");
Command = USART1_RX_BUF[0];
Command <<= 8;
Command = Command + USART1_RX_BUF[1];
USART1_RX_STA=0;
}
}
#if EN_USART1_RX //如果使能了接收
u8 USART1_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节
u16 USART1_RX_STA=0; //接收状态标记 bit15--接收完成标志 bit14--接收到0x0d bit13~0--接收到的有效字节数目
//串口2中断服务程序 接收到的数据必须是0x0d 0x0a结尾
void USART1_IRQHandler(void) //串口1中断服务程序
{
u8 Res;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾)
{
Res =USART_ReceiveData(USART1); //(USART1->DR); //读取接收到的数据
if((USART1_RX_STA&0x8000)==0) //接收未完成
{
if(USART1_RX_STA&0x4000) //接收到了0x0d
{
if(Res!=0x0a)USART1_RX_STA=0; //接收错误,重新开始
else USART1_RX_STA|=0x8000; //接收完成了
}
else //还没收到0X0D
{
if(Res==0x0d)USART1_RX_STA|=0x4000;
else
{
USART1_RX_BUF[USART1_RX_STA&0X3FFF]=Res ;
USART1_RX_STA++;
if(USART1_RX_STA>(USART_REC_LEN-1))USART1_RX_STA=0;//接收数据错误,重新开始接收
}
}
}
}
}
#endif
#if EN_USART2_RX //如果使能了接收
u8 USART2_RX_BUF[USART_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.
u16 USART2_RX_STA=0; //bit15--接收完成标志 bit14--接收到0x0d bit13~0--接收到的有效字节数
//串口2中断服务程序 接收到的数据必须是0x0d 0x0a结尾
void USART2_IRQHandler(void) //串口2中断服务程序
{
u8 Res;
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //接收中断
{
Res =USART_Re
