protodma._c

基于D12的USB固件驱动

#include "includes.h"

extern  unsigned char idata_EpBuf[EP2_PACKET_SIZE];
//Get fireware version
void get_fireware_version()
{
   unsigned char i;
   i=0x30;     //firmware version number
   single_transmit((unsigned char *)&i,1);
   
}
//Get Buffer Size of Ep2
void get_buffer_size()
{
   unsigned char i[4];
   i[0]=EP2_PACKET_SIZE;
   i[1]=0;
   i[2]=0;
   i[3]=0;
   single_transmit((unsigned char *)&i,4);
}

//Data Transfer Operation
void trans_data()
{
   unsigned char i,len,epstatus;
   if(ControlData.dataBuffer[5]==0x81)      //Transmit Data from MCU TO HOST
   {
       i=D12_WriteEndpoint(5,ControlData.dataBuffer[3],idata_EpBuf); //Transmit Data
       
   }
   if(ControlData.dataBuffer[5]==0x80)      //Transmit Data from HOST TO MCU
   {
       epstatus=D12_ReadEndpointStatus(4);  //Read Endpoint Status
       epstatus &=D12_BUFFERFULL;           //D12_BUFFERFULL=0x60
       if(epstatus==0x60)
       len=D12_ReadEndpoint(4,64,idata_EpBuf);   //Read DiBuffer Data  
   }
   single_transmit(0,0);                    //Transmit ACK
}

//Vendor Request
void read_write_register(void)
{
   //unsigned char len,epstatus;
   if(ControlData.DeviceRequest.bmRequestType & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
   {
       if(ControlData.DeviceRequest.wIndex==GET_FIREWARE_VERSION &&
           ControlData.DeviceRequest.wValue==0 &&
           ControlData.DeviceRequest.wLength==1)
           get_fireware_version();                  //Get Fireware Version
       else if(ControlData.DeviceRequest.wIndex==GET_BUFFER_SIZE &&
           ControlData.DeviceRequest.wValue==0 &&
           ControlData.DeviceRequest.wLength==4)
           get_buffer_size();                       //Get Buffer Size
       else   stall_ep0();
   }  //if read register
   else
   {
       if(ControlData.DeviceRequest.wIndex==TRANS_REQUEST &&
           ControlData.DeviceRequest.wValue==0 &&
           ControlData.DeviceRequest.wLength==6)
           trans_data();                            //Transfer Data
       else   stall_ep0();
   }  //if write register
}