大家来看看我的D12的发送和接受子程序是否正确，为什么枚举不正确？谢谢！！！

大家来看看我的发送和接受子程序：（单步执行时，ep_last为0X03，为什么？这可能是那里的错误，我在D12数据单里看到0X03表示数据接受或发送成功，PID解码错误，位7－4不是位3－0的反码 ）
void ep0_rxdone(void)
{
unsigned char ep_last, i;

ep_last = D12_ReadLastTransactionStatus(0); // Clear interrupt flag

if (ep_last & D12_SETUPPACKET)
{

ControlData.wLength = 0;
ControlData.wCount = 0;

if( D12_ReadBuffer(0,(unsigned char *)(&(ControlData.DeviceRequest)),sizeof(ControlData.DeviceRequest)) != sizeof(DEVICE_REQUEST))
{

D12_SetEndpointStatus(0, 1);
D12_SetEndpointStatus(1, 1);
bEPPflags.bits.control_state = USB_IDLE;

return;
}

ControlData.DeviceRequest.wValue = SWAP(ControlData.DeviceRequest.wValue);
ControlData.DeviceRequest.wIndex = SWAP(ControlData.DeviceRequest.wIndex);
ControlData.DeviceRequest.wLength = SWAP(ControlData.DeviceRequest.wLength);

// Acknowledge setup here to unlock in/out endp
D12_AcknowledgeEndpoint(0);
D12_AcknowledgeEndpoint(1);

ControlData.wLength = ControlData.DeviceRequest.wLength;
ControlData.wCount = 0;



if (ControlData.DeviceRequest.bmRequestType & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
{
bEPPflags.bits.setup_packet = 1;
bEPPflags.bits.control_state = USB_TRANSMIT; /* get command */ }

else
{
if (ControlData.DeviceRequest.wLength == 0)
{
bEPPflags.bits.setup_packet = 1;
bEPPflags.bits.control_state = USB_IDLE; /* set command */
}
else
{
if(ControlData.DeviceRequest.wLength > MAX_CONTROLDATA_SIZE)
{
bEPPflags.bits.control_state = USB_IDLE;
D12_SetEndpointStatus(0, 1);
D12_SetEndpointStatus(1, 1);
}
else
{
bEPPflags.bits.control_state = USB_RECEIVE; /* set command with OUT token */
}
} // set command with data
} // else set command
} // if setup packet

else if (bEPPflags.bits.control_state == USB_RECEIVE)
{ i =D12_ReadBuffer(0, ControlData.dataBuffer + ControlData.wCount,EP0_PACKET_SIZE);

ControlData.wCount += i;

if( i != EP0_PACKET_SIZE || ControlData.wCount >= ControlData.wLength)
{
bEPPflags.bits.setup_packet = 1;
bEPPflags.bits.control_state = USB_IDLE;
}
}

else
{
bEPPflags.bits.control_state = USB_IDLE;
}

}
//control in function
void ep0_txdone(void)
{
short i = ControlData.wLength - ControlData.wCount;

D12_ReadLastTransactionStatus(1); // Clear interrupt flag

if (bEPPflags.bits.control_state != USB_TRANSMIT)

{
return; }
//-------------------------

if( i >= EP0_PACKET_SIZE)
//ControlData.pData=&ControlData.dataBuffer;
D12_WriteBuffer(1, ControlData.pData + ControlData.wCount,EP0_PACKET_SIZE);

ControlData.wCount += EP0_PACKET_SIZE;

bEPPflags.bits.control_state = USB_TRANSMIT;
}
else if( i != 0)
{ D12_WriteBuffer(1,ControlData.pData + ControlData.wCount,i);

ControlData.wCount += i;

bEPPflags.bits.control_state = USB_IDLE;
}
else if (i == 0)
{
D12_WriteBuffer(1, 0, 0); // Send zero packet at the end ???

bEPPflags.bits.control_state = USB_IDLE;
}
}


[编辑 -  7/5/03 by  djsnake]

用PHILIPS的D12程序不会有错的,只要你移植没有出错.我几乎没对CHAP_9.C做多大改动就在其他MCU上实现了USB的连接.

用PHILIPS的D12程序不会有错的,只要你移植没有出错.我几乎没对CHAP_9.C做多大改动就在其他MCU上实现了USB的连接.

楼上说的对，PHILIPS的D12的枚举等程序没什么问题，只是罗嗦了点，熟悉了是可以优化，要改的只是mainloop.c和isr.c