chap_9.c

small rtos在周立功的开发板dp51上的使用示例

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

#include "config.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;
CONTROL_XFER ControlData;
//extern IO_REQUEST idata ioRequest;
extern EPPFLAGS bEPPflags;
extern code void (*VendorDeviceRequest[])(void);

//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(0x0666),
	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,
	0xa0,
	0x1
};

//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,
	USB_ENDPOINT_TYPE_INTERRUPT,
	SWAP(EP2_PACKET_SIZE),
	10
};

code USB_ENDPOINT_DESCRIPTOR EP2_RXDescr =
{
	sizeof(USB_ENDPOINT_DESCRIPTOR),
	USB_ENDPOINT_DESCRIPTOR_TYPE,
	0x2,
//	USB_ENDPOINT_TYPE_BULK,
	USB_ENDPOINT_TYPE_INTERRUPT,
	SWAP(EP2_PACKET_SIZE),
	10
};


//USB标准请求
code void (*StandardDeviceRequest[])(void) =
{
	get_status,
	clear_feature,
	reserved,
	set_feature,
	reserved,
	set_address,
	get_descriptor,
	reserved,
	get_configuration,
	set_configuration,
	get_interface,
	set_interface,
	reserved,
	reserved,
	reserved,
	reserved
};


/*
   //*************************************************************************
   // 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)
{
	switch (MSB(ControlData.DeviceRequest.wValue))
	{
	    case  USB_DEVICE_DESCRIPTOR_TYPE:
			code_transmit((unsigned char code *)&DeviceDescr, sizeof(USB_DEVICE_DESCRIPTOR));
			break;
		case  USB_CONFIGURATION_DESCRIPTOR_TYPE:
			code_transmit((unsigned char code *)&ConfigDescr, CONFIG_DESCRIPTOR_LENGTH);
			break;
		default:
			stall_ep0();
			break;
	}
}


//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();
}



//*****************************************************************************************
//返回stall应答
void stall_ep0(void)
{
	D12_SetEndpointStatus(0, 1);
	D12_SetEndpointStatus(1, 1);
}

//断开USB总线
void disconnect_USB(void)
{
	// Initialize D12 configuration
	D12_SetMode(D12_NOLAZYCLOCK, D12_SETTOONE | D12_CLOCK_12M);
}

//连接USB总线
void connect_USB(void)
{
	// reset event flags
	DISABLE;
	bEPPflags.value = 0;//清除所有状态
	ENABLE;

	// V2.1 enable normal+sof interrupt
	D12_SetDMA(D12_ENDP4INTENABLE | D12_ENDP5INTENABLE);

	// Initialize D12 configuration
	D12_SetMode(D12_NOLAZYCLOCK|D12_SOFTCONNECT, D12_SETTOONE | D12_CLOCK_12M);
}

//重新连接到USB总线
void reconnect_USB(void)
{
//	unsigned long clk_cnt;

//	D12SUSPD = 0;
	disconnect_USB();
	connect_USB();

}

//恢复到未配置状态
void init_unconfig(void)
{
//	unsigned char i;

	D12_SetEndpointEnable(0);	/* Disable all endpoints but EPP0. */
}

//设置配置状态
void init_config(void)
{
	D12_SetEndpointEnable(1);	/* Enable  generic/iso endpoints. */
}

//从端点号1发送数据
void single_transmit(unsigned char * buf, unsigned char len)
{
	if( len <= EP0_PACKET_SIZE) {
		D12_WriteEndpoint(1, len, buf);
	}
}

//发送端点号1建立代码
void code_transmit(unsigned char code * pRomData, unsigned short len)
{
	ControlData.wCount = 0;
	if(ControlData.wLength > len)
		ControlData.wLength = len;

	ControlData.pData = pRomData;
	if( ControlData.wLength >= EP0_PACKET_SIZE) {
		D12_WriteEndpoint(1, EP0_PACKET_SIZE, ControlData.pData);//发送16字节数据
		ControlData.wCount += EP0_PACKET_SIZE;
		DISABLE;
		bEPPflags.bits.control_state = USB_TRANSMIT;
		ENABLE;
	}
	else {
		D12_WriteEndpoint(1, ControlData.wLength, pRomData);//发送16字节内数据
		ControlData.wCount += ControlData.wLength;
		DISABLE;
		bEPPflags.bits.control_state = USB_IDLE;
		ENABLE;
	}

}

//请求处理子程序
void control_handler()
{
	unsigned char type, req;

	type = ControlData.DeviceRequest.bmRequestType & USB_REQUEST_TYPE_MASK;
	req = ControlData.DeviceRequest.bRequest & USB_REQUEST_MASK;

	if (type == USB_STANDARD_REQUEST)
		(*StandardDeviceRequest[req])();//调用标准请求
	else if (type == USB_VENDOR_REQUEST)
		(*VendorDeviceRequest[req])();//调用厂商请求
	else
		stall_ep0();
}