本帖最后由 wang12zhe 于 2014-5-29 13:38 编辑
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
//GPIO 和USART的相关时钟都已经使能， 这部分代码在其他部分，此处没贴出来
/* Configure USART2 Tx (PA.02)\USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//GPIO_Mode_AF_PP; 复用推挽
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART2 Rx (PA.03)/USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART2 */
USART_DeInit(USART2);
//USART_InitStructure.USART_BaudRate = BaudLink[Sci2.BaudSel];
USART_InitStructure.USART_BaudRate = 19200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode =USART_Mode_Rx|USART_Mode_Tx;
/* Configure USART2 */
USART_Init(USART2, &USART_InitStructure);
/* Enable USART2 Receive and Transmit interrupts */
USART_ITConfig(USART2, USART_IT_RXNE, DISABLE);//DISABLE
USART_ITConfig(USART2, USART_IT_TXE, ENABLE); //使能发送寄存器空中断，区分于发送完成中断
/* Enable the USART2 */
USART_Cmd(USART2, ENABLE);
}
void sys_reset_time_handle(u8 uc_cmd,u16 us_count)
{
//if(TxCnt<5000)
//TxCnt++;
TxBuffer1[0]=0x01;
TxBuffer1[1]=uc_cmd;
TxBuffer1[2] = 0X00;
TxBuffer1[3] = 0X8B; //参数存储位置:P9.11 地址:155
TxBuffer1[4]=us_count >> 8;
TxBuffer1[5]=us_count & 0XFF;
TxBuffer1[6]=GetCRC16(TxBuffer1,6);
TxBuffer1[7]=GetCRC16(TxBuffer1,6)>>8;
USART_ITConfig(USART2, USART_IT_TXE, ENABLE);
}
int main(void)
{
u16 us_reset_count;
volatile u16 us_delay_count;
u8 uc_update_ok=0;
u8 uc_read_ok = 0;
//设备初始化
DeviceInit();
InitDelayTime = 200;
//===========增加看门狗复位次数处理=====
//思路:当系统上电后，读出DSP里存储的系统启动次数信息，加一后再传给DSP进行存储
// 注意需要增加该信息复位处理，实现系统启动次数的手动复位
//==============================
//
while(!uc_read_ok){ //使用while循环，直到读取数据正确
Sci1.TxCouter = 0;
Sci1.state.ParSet = 0;
Sci1.state.CmdSet = 0;
Sci1.state.ComType = 3;
sys_reset_time_handle(0X03,0);//读出参数
while(uc_g_TX_time); //uc_g_TX_time 在SysTick中断里减一，每个0.2ms触发一次SysTick中断
uc_g_TX_time=40;
if(RxBuffer1[1]==0x03){ //如果RxBuffer1[1]==0x03 表明接收数据正确
us_reset_count = RxBuffer1[4];
us_reset_count= us_reset_count<<8+ RxBuffer1[5];
us_reset_count ++; //复位次数加1
uc_read_ok =1;
while(!uc_update_ok){
Sci1.state.ParSet = 0;
Sci1.state.CmdSet = 1;
Sci1.state.ComType = 6;
sys_reset_time_handle(0X06,us_reset_count);
us_delay_count=5000;
while(us_delay_count--){
if(0==us_delay_count%1000){
IWDG_ReloadCounter();//喂狗
}
}
if(RxBuffer1[1]==0x06){
uc_update_ok = 1;
}
}
}else{
Sci1.state.RxEnFlag =0;
}
}
void USART2_IRQHandler(void)
{
u8 datatemp;
if (USART_GetFlagStatus(USART2, USART_FLAG_ORE) != RESET) //接收溢出中断
{
(u16)(USART2->DR & (u16)0x01FF);
}
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //产生接收中断
{
USART_ClearITPendingBit(USART2,USART_IT_RXNE);//清除中断标志位
/* Read one byte from the receive data register */
datatemp = USART_ReceiveData(USART2);
//testbuff[cnt++] = datatemp;
//if(cnt>7) cnt = 0;
if( Sci1.state.RxEnFlag==1 )
{
if( Sci1.RxCouter==0 )
{
if( Sci1.FrameTimeCnt>Sci1.FrameIntervalCnt1 )
{
Sci1.FrameTimeCnt = 0;
if( (datatemp==Sci1.CtlAdd) )
{
*(Sci1.RxPoint+Sci1.RxCouter) = datatemp;
Sci1.RxCouter++;
}
else
{
Sci1.RxCouter = 0;
}
}
else
{
Sci1.RxCouter = 0;
Sci1.FrameTimeCnt = 0;
}
}
else if( Sci1.RxCouter>=Sci1.MaxCnt )
{
if( Sci1.FrameTimeCnt>Sci1.FrameIntervalCnt1 )
{
}
else
{
Sci1.RxCouter = 0;
Sci1.FrameTimeCnt = 0;
}
}
else
{
if( Sci1.FrameTimeCnt<Sci1.FrameIntervalCnt0 )
{
*(Sci1.RxPoint+Sci1.RxCouter) = datatemp;
Sci1.RxCouter++;
Sci1.FrameTimeCnt = 0;
}
else
{
Sci1.FrameTimeCnt = 0;
Sci1.RxCouter=0;
}
}
}
else
{
Sci1.RxCouter = 0;
Sci1.FrameTimeCnt = 0; //源程序这里是== add wang 20140528
}
}
if(USART_GetITStatus(USART2, USART_IT_TXE) != RESET) //发送寄存器空中断
{
wait_time=20;
Sci1.state.TxEnFlag=1;
if( Sci1.state.TxEnFlag==1 )
{
Sci1.state.RxEnFlag = 0;
Sci1.TxMaxCnt = 8;
if(Sci1.TxCouter == Sci1.TxMaxCnt) //发送结束
{
Sci1.TxCouter = 0;
Sci1.state.TxEnFlag = 0;
Sci1.state.RxEnFlag = 1;
// USART_ClearITPendingBit(USART2,USART_IT_RXNE);//清除中断标志位
USART_ITConfig(USART2, USART_IT_TXE, DISABLE);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
Sci1.state.RxEnFlag = 1; // =============================能正常执行到这里，说明发送是正常结束的
// Sci1.state.RxOverFlag = 1;
}
else
{
USART_SendData(USART2, *(Sci1.TxPoint+Sci1.TxCouter) ); //*(Sci1.TxPoint+Sci1.TxCouter)
Sci1.TxCouter++;
}
}
}
if(USART_GetITStatus(USART2, USART_IT_ERR) != RESET)
{
// USART_DeInit(USART2);
}
}
当发送正常结束后，就会产生接收溢出 中断 (ORE中断），而且正常情况下应该收到8个数据的，但是只产生一次接收溢出 中断 (ORE中断） ，
实在是没办法了，求解，
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