为什么这个程序跑不到 输出3里头呢??
void usb_interrupt(void) interrupt 13
{
printf(0x90,"0",1);
if(UEPINT&EP0INT)
{
UEPNUM=0;
printf(0x91,"1",1);
if ((UEPSTAX&RXSETUP) && (!Setup_packet))
{
printf(0x92,"2",1);
Setup_packet=1;
UEPSTAX= UEPSTAX & (~0x04);
return;
}
if ((UEPSTAX&RXOUTB0) && Setup_packet)
{
printf(0x93,"3",1);
Setup_packet=0;
UEPSTAX= UEPSTAX & (~0x42);
read_endpoint_buf(ENDPOINT0,32,control_data_buff.pData); //读端点0的FIFO
requestcmd.bmRequestType=control_data_buff.pData[0];
requestcmd.bRequest=control_data_buff.pData[1];
requestcmd.wValue=(control_data_buff.pData[3]<<8)+control_data_buff.pData[2];
requestcmd.wIndex=(control_data_buff.pData[5]<<8)+control_data_buff.pData[4];
requestcmd.wLength=(control_data_buff.pData[7]<<8)+control_data_buff.pData[6];
if (requestcmd.bmRequestType & 0x60==0) //是USB标准请求吗?
{
printf(0x94,"4",1);
switch(requestcmd.bRequest)
{
case get_status :printf(0x80,"1",1);Get_Status(requestcmd.bmRequestType&0x03); break;
case clear_ferture :printf(0x81,"2",1);break;//Clear_Ferture(); break;
case set_feature :printf(0x82,"3",1);break;//Set_Feature(); break;
case set_address :printf(0x83,"4",1);break;//Set_Address(); break;
case get_descriptor :printf(0x84,"5",1);Get_Descriptor(requestcmd.wValue,requestcmd.wLength); break;
case get_configuration:printf(0x85,"6",1);break;//Get_Configuration();break;
case set_configuration:printf(0x86,"7",1);break;//Set_Configuration();break;
case get_interface :printf(0x87,"8",1);Get_Interface(); break;
case set_interface :printf(0x88,"9",1);break;//Set_Interface(); break;
default :printf(0x89,"a",1);break;
}
return;
}
else if (requestcmd.bmRequestType==0xa1) //设备类请求,
{
//....
}
}
}
if(UEPINT&EP1INT)
{
//......
}
if(UEPINT&EP2INT)
{
//......
}
}
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