INTERRUPT (SIG_USART_DATA)
{
if(int_data_num<(TxCounter-1))
{
UDR0=*pTxBuffer++;
int_data_num++;
}
else
{
int_data_num=0;
TXData_Num--;
}
}
bool Test_Int_Send(void)
{
consideration
if(0>=TXData_Num)
{
Read_Idx=Write_Idx; return false;
}
pTxBuffer = (unsigned char *)&Int_TXData[Read_Idx++];
if(TXDATA_ARRAY==Read_Idx) Read_Idx = 0;
TxCounter = sizeof(USART_TXDataTypedef);
cli();
UBRR0H=0x00;
UBRR0L=0x34;
UCSR0A=0x02;
UCSR0B =0b00111000; //enable txd and rxd
UCSR0C =0b00100110;
while(!( UCSR0A & (1<<UDRE0)));
UDR0 = *pTxBuffer++;
sei();
return true;
}
int main()
{
Test_Int_SendPrepare(1,2,3,5);
Test_Int_Send();
while(1);
}
程序如上，sei后即触发中断，但是运行到中断处理程序入口即停止。怀疑是嵌套终端，一直触发中断。如果是这样的此中断如何使用？我已经在开中断之前发送一个数据到UDR0。 |
楼主
标题置顶
标题高亮
