isr.c

USB PDIUSB12D C语言 中断服务处理程序

//#include <reg51.h>                /* special function register declarations   */ 
#include <stdio.h>
#include <string.h>

#include "d12ci.h"
#include "main.h"
#include "USB100.h"
#include "isr.h"
//#include "..\inc\44b.h"

#include "bulk_only.h"

/*
//*************************************************************************
//  Public static data
//*************************************************************************
*/

/* Control endpoint TX/RX buffers */
extern CONTROL_XFER ControlData;
extern EPPFLAGS bEPPflags;
	
// ISR static vars ;

unsigned char  EpBuf[EP2_PACKET_SIZE];
unsigned char  GenEpBuf[EP1_PACKET_SIZE];
IO_REQUEST  ioRequest;
unsigned char ioSize, ioCount;

unsigned long ClockTicks = 0;
unsigned char MainEpBuf[256];

extern unsigned char bulk_state;



void usb_isr()
{
	int i;
	unsigned int i_st;
	DISABLE;
	rI_ISPC=BIT_EINT2;//clear regiester

	//fn_usb_isr() begin;
	bEPPflags.bits.in_isr = 1;
	
	i_st = D12_ReadInterruptRegister();

	if(i_st != 0) {

		if(i_st & D12_INT_ENDP0IN){
			ep0_txdone();
			}
		if(i_st & D12_INT_ENDP0OUT){
			ep0_rxdone();
		}

		if(i_st & D12_INT_ENDP2IN){
			main_txdone();
			}
		if(i_st & D12_INT_ENDP2OUT){
			main_rxdone();
			}
	}
	bEPPflags.bits.in_isr = 0;

	ENABLE;
}

void bus_reset(void)
{
;
}
void dma_eot(void)
{
;
}
//---------------------------------
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;
	//判断端点是否满,如是,则取出
		if( D12_ReadEndpoint(0, sizeof(ControlData.DeviceRequest),
			(unsigned char *)(&(ControlData.DeviceRequest))) != sizeof(DEVICE_REQUEST) ) {

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

		Uart_Printf("bmRequestType=0x%x,bRequest=0x%x,wValue=0x%x,wIndex=0x%x,wLength=0x%x\n",
							ControlData.DeviceRequest.bmRequestType,
							ControlData.DeviceRequest.bRequest,
							ControlData.DeviceRequest.wValue,
							ControlData.DeviceRequest.wIndex,
							ControlData.DeviceRequest.wLength);


		// Acknowledge setup here to unlock in/out endp
	//向控制输出端点发送应答建立命令以重新使能下一个建立阶段
		D12_AcknowledgeEndpoint(0);
		D12_AcknowledgeEndpoint(1);

		ControlData.wLength = ControlData.DeviceRequest.wLength;
		ControlData.wCount = 0;
	//需要证实控制传输是控制读还是写,如果是读:
	//如果控制传输是一个控制读类型那就是说器件需要在下一个数据阶段向
	//主机发回数据包.MCU需要设置一个标志以指示USB 设备现在正处于传输
	//模式即准备在主机发送请求时发送数据

		if (ControlData.DeviceRequest.bmRequestType & (unsigned char)USB_ENDPOINT_DIRECTION_MASK) {
			bEPPflags.bits.setup_packet = 1;
			bEPPflags.bits.control_state = USB_IDLE;		/* get command */
		}
	//如果是写
		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_ReadEndpoint(0, EP0_PACKET_SIZE,
			ControlData.dataBuffer + ControlData.wCount);

		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;
	}

}
//----------------------------------
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) {
		D12_WriteEndpoint(1, EP0_PACKET_SIZE, ControlData.pData + ControlData.wCount);
		ControlData.wCount = ControlData.wCount + EP0_PACKET_SIZE;

		bEPPflags.bits.control_state = USB_TRANSMIT;
	}
	else if( i != 0) {
		D12_WriteEndpoint(1, i, ControlData.pData + ControlData.wCount);
		ControlData.wCount = ControlData.wCount + i;

		bEPPflags.bits.control_state = USB_IDLE;
	}
	else if (i == 0){
		D12_WriteEndpoint(1, 0, 0); // Send zero packet at the end ???

		bEPPflags.bits.control_state = USB_IDLE;
	}

}

void main_txdone(void)
{

	D12_ReadLastTransactionStatus(5); /* Clear interrupt flag */

	switch(bulk_state){
		case BULK_DATA_TRANS:
			TransDataGoOn();
			break;
		case BULK_DATA_END:
			TransmitCSW();
			break;
		case BULK_REQEST_TRANS:
			TransRequestGoOn();
			break;
		case BULK_CSW_END:
			break;
		default:	return;
		}

}

void main_rxdone(void)
{
	int i;
	D12_ReadLastTransactionStatus(4); /* Clear interrupt flag */
	
	D12_ReadEndpoint(4, 64, EpBuf);
	for(i=0;i<0x40;i++) Uart_Printf("%x ",EpBuf[i]);
	if((bulk_state != BULK_DATA_RECIEVE) &&(EpBuf[0] == 0x55)) InterpretCBW();
	else Trans_Data2PC();

}