protozlg.c

KeilC51下的USB的slave设备源码,MCS51开发.

/*
   //*************************************************************************
   //
   //                  		ZLGMCU
   //				www.zlgmcu.com
   // File Name:	protozlg.C
   // Revision:		0.4(2002-07-08)
   // Author:		Liu Ying Bin
   // Use library:  USB51S.LIB
   // Note:			USB51S.LIB不带DMA控制功能
   //*************************************************************************
   */


#include <stdio.h>
#include <string.h>

#include <reg51.h>                /* special function register declarations   */
#include "isr.h"
#include "mainloop.h"
#include "protozlg.h"

extern CONTROL_XFER ControlData;
extern IO_REQUEST idata ioRequest;
extern EPPFLAGS bEPPflags;
extern unsigned char idata EpBuf[];
byte_count byte_cnt;


void get_firmware_version()
{
	unsigned char i;

	i = 0x30; // firmware version number
	single_transmit((unsigned char *)&i, 1);
}

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);
}

void read_write_register(void)
{
//	unsigned char i;

	if(ControlData.DeviceRequest.bmRequestType & (unsigned char)USB_ENDPOINT_DIRECTION_MASK) {
		if(ControlData.DeviceRequest.wIndex == GET_FIRMWARE_VERSION &&
			ControlData.DeviceRequest.wValue == 0 &&
			ControlData.DeviceRequest.wLength == 1)
			get_firmware_version();
		else
		if(ControlData.DeviceRequest.wIndex == GET_BUFFER_SIZE &&
			ControlData.DeviceRequest.wValue == 0 &&
			ControlData.DeviceRequest.wLength == 4)
			get_buffer_size();
		else
			stall_ep0();

	}	// if read register
	else{
		if(ControlData.DeviceRequest.wIndex == SETUP_DMA_REQUEST &&
			ControlData.DeviceRequest.wValue == 0 &&
			ControlData.DeviceRequest.wLength == 6)
			{
				if(ControlData.dataBuffer[5]==0x81)
				{
					byte_cnt.byte.high = ControlData.dataBuffer[4];
					byte_cnt.byte.low = ControlData.dataBuffer[3];
					if(byte_cnt.word<64)
					{
						D12_WriteEndpoint(5, byte_cnt.byte.low, EpBuf);
						byte_cnt.word=0;
					}
					else
					{
						byte_cnt.word=byte_cnt.word-64;
						D12_WriteEndpoint(5, 64, EpBuf);
					}
				}
				if(ControlData.dataBuffer[5]==0x82)
				{
//					i = D12_ReadEndpoint(4, 64, EpBuf);//读空端点2数据
//					i = D12_ReadEndpoint(4, 64, EpBuf);
				}
				single_transmit(0, 0);
			}
		else
			stall_ep0();
	}	// if write register
}