USB编程

开发平台：
Visual C++

Chap_9.c：源码内容
							#include <stdio.h>
#include <string.h>
#include <reg51.h>                /* special function register declarations   */
//#include "epphal.h"
#include "d12ci.h"
#include "mainloop.h"
#include "usb100.h"
#include "chap_9.h"
#define NUM_ENDPOINTS	4
#define CONFIG_DESCRIPTOR_LENGTH    sizeof(USB_CONFIGURATION_DESCRIPTOR) 
									+ sizeof(USB_INTERFACE_DESCRIPTOR) 
									+ (NUM_ENDPOINTS * sizeof(USB_ENDPOINT_DESCRIPTOR))
extern CONTROL_XFER ControlData;
extern IO_REQUEST idata ioRequest;
extern EPPFLAGS bEPPflags;
//设备描述符
code USB_DEVICE_DESCRIPTOR DeviceDescr =
{
	sizeof(USB_DEVICE_DESCRIPTOR),
    USB_DEVICE_DESCRIPTOR_TYPE,
    SWAP(0x0110),
    USB_CLASS_CODE_TEST_CLASS_DEVICE,
    0, 0,
	EP0_PACKET_SIZE,
	SWAP(0x0471),
	SWAP(0x0677),
	SWAP(0x0100),
    0, 0, 0,
	1
};
//配置描述符
code USB_CONFIGURATION_DESCRIPTOR ConfigDescr =
{
    sizeof(USB_CONFIGURATION_DESCRIPTOR),
    USB_CONFIGURATION_DESCRIPTOR_TYPE,
    SWAP(CONFIG_DESCRIPTOR_LENGTH),
	1,
	1,
    0,
	0x60,//自供电
	0x32
};
//接口描述符
code USB_INTERFACE_DESCRIPTOR InterfaceDescr =
{
    sizeof(USB_INTERFACE_DESCRIPTOR),
    USB_INTERFACE_DESCRIPTOR_TYPE,
    0,
    0,
	NUM_ENDPOINTS,
	USB_CLASS_CODE_TEST_CLASS_DEVICE,
	USB_SUBCLASS_CODE_TEST_CLASS_D12,
	USB_PROTOCOL_CODE_TEST_CLASS_D12,
	0
};
//端点描述符
code USB_ENDPOINT_DESCRIPTOR EP1_TXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x81,
	USB_ENDPOINT_TYPE_INTERRUPT,
	SWAP(EP1_PACKET_SIZE),
	1
};
code USB_ENDPOINT_DESCRIPTOR EP1_RXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x1,
	USB_ENDPOINT_TYPE_INTERRUPT,
	SWAP(EP1_PACKET_SIZE),
	1
};
code USB_ENDPOINT_DESCRIPTOR EP2_TXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x82,
	USB_ENDPOINT_TYPE_BULK,
	SWAP(EP2_PACKET_SIZE),
	10
};
code USB_ENDPOINT_DESCRIPTOR EP2_RXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x2,
	USB_ENDPOINT_TYPE_BULK,
	SWAP(EP2_PACKET_SIZE),
	10
};
/*
   //*************************************************************************
   // USB Protocol Layer
   //*************************************************************************
*/
void reserved(void)
{
	stall_ep0();
}
/*
   //*************************************************************************
   // USB standard device requests
   //*************************************************************************
*/
//获取设备状态
void get_status(void)
{
	unsigned char endp, txdat[2];
	unsigned char bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;
	unsigned char c;
	if (bRecipient == USB_RECIPIENT_DEVICE) {
		if(bEPPflags.bits.remote_wakeup == 1)//获取远程唤醒状态
			txdat[0] = 3;
		else
			txdat[0] = 1;
		txdat[1]=0;
		single_transmit(txdat, 2);
	} else if (bRecipient == USB_RECIPIENT_INTERFACE) {//获取接口状态
		txdat[0]=0;
		txdat[1]=0;
		single_transmit(txdat, 2);
	} else if (bRecipient == USB_RECIPIENT_ENDPOINT) {//获取端点状态
		endp = (unsigned char)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS);
		if (ControlData.DeviceRequest.wIndex & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
			c = D12_SelectEndpoint(endp*2 + 1);	/* Control-in */
		else
			c = D12_SelectEndpoint(endp*2);	/* Control-out */
		if(c & D12_STALL)
			txdat[0] = 1;
		else
			txdat[0] = 0;
		txdat[1] = 0;
		single_transmit(txdat, 2);
	} else
		stall_ep0();
}
//特性清除
void clear_feature(void)
{
	unsigned char endp;
	unsigned char bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;
	if (bRecipient == USB_RECIPIENT_DEVICE
		&& ControlData.DeviceRequest.wValue == USB_FEATURE_REMOTE_WAKEUP) {//清除远程唤醒功能
		DISABLE;
		bEPPflags.bits.remote_wakeup = 0;
		ENABLE;
		single_transmit(0, 0);
	}
	else if (bRecipient == USB_RECIPIENT_ENDPOINT
		&& ControlData.DeviceRequest.wValue == USB_FEATURE_ENDPOINT_STALL) {//清除端点stall
		endp = (unsigned char)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS);
		if (ControlData.DeviceRequest.wIndex & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
			/* clear TX stall for IN on EPn. */
			D12_SetEndpointStatus(endp*2 + 1, 0);
		else
			/* clear RX stall for OUT on EPn. */
			D12_SetEndpointStatus(endp*2, 0);
		single_transmit(0, 0);
	} else
		stall_ep0();
}
//特性设置
void set_feature(void)
{
	unsigned char endp;
	unsigned char bRecipient = ControlData.DeviceRequest.bmRequestType & USB_RECIPIENT;
	if (bRecipient == USB_RECIPIENT_DEVICE
		&& ControlData.DeviceRequest.wValue == USB_FEATURE_REMOTE_WAKEUP) {//设置远程唤醒功能
		DISABLE;
		bEPPflags.bits.remote_wakeup = 1;
		ENABLE;
		single_transmit(0, 0);
	}
	else if (bRecipient == USB_RECIPIENT_ENDPOINT
		&& ControlData.DeviceRequest.wValue == USB_FEATURE_ENDPOINT_STALL) {//设置端点stall
		endp = (unsigned char)(ControlData.DeviceRequest.wIndex & MAX_ENDPOINTS);
		if (ControlData.DeviceRequest.wIndex & (unsigned char)USB_ENDPOINT_DIRECTION_MASK)
			/* clear TX stall for IN on EPn. */
			D12_SetEndpointStatus(endp*2 + 1, 1);
		else
			/* clear RX stall for OUT on EPn. */
			D12_SetEndpointStatus(endp*2, 1);
		single_transmit(0, 0);
	} else
		stall_ep0();
}
//设置地址
void set_address(void)
{
	D12_SetAddressEnable((unsigned char)(ControlData.DeviceRequest.wValue &
		DEVICE_ADDRESS_MASK), 1);
	single_transmit(0, 0);
}
//获取描述符
void get_descriptor(void)
{
	unsigned char bDescriptor = MSB(ControlData.DeviceRequest.wValue);
	if (bDescriptor == USB_DEVICE_DESCRIPTOR_TYPE) {//获取设备描述符
		code_transmit((unsigned char code *)&DeviceDescr, sizeof(USB_DEVICE_DESCRIPTOR));
	} else if (bDescriptor == USB_CONFIGURATION_DESCRIPTOR_TYPE) {//获取配置描述符
		code_transmit((unsigned char code *)&ConfigDescr, CONFIG_DESCRIPTOR_LENGTH);
	} else
		stall_ep0();
}
//获取配置状态
void get_configuration(void)
{
	unsigned char c = bEPPflags.bits.configuration;
	single_transmit(&c, 1);
}
//设置配置状态
void set_configuration(void)
{
	if (ControlData.DeviceRequest.wValue == 0) {
		//设备进入未配置状态
		single_transmit(0, 0);
		DISABLE;
		bEPPflags.bits.configuration = 0;
		ENABLE;
		init_unconfig();
	} else if (ControlData.DeviceRequest.wValue == 1) {
		//配置设备
		single_transmit(0, 0);
		init_unconfig();
		init_config();
		DISABLE;
		bEPPflags.bits.configuration = 1;
		ENABLE;
	} else
		stall_ep0();
}
//获取接口状态
void get_interface(void)
{
	unsigned char txdat = 0;        /* Only/Current interface = 0 */
	single_transmit(&txdat, 1);
}
//设置接口状态
void set_interface(void)
{
	if (ControlData.DeviceRequest.wValue == 0 && ControlData.DeviceRequest.wIndex == 0)
		single_transmit(0, 0);
	else
		stall_ep0();
}

						