scsicbwprocess.c

在51下的外挂硬盘和FLASH的MP3方案程序以及原理图

#ifndef _SCSI_DEFINE
 #include "SCSI.c"
#endif

void SCSICBWProcess(void)
{
	//验证CBW有效性
	if (USBEP1Buffer.InLength!=0x1f) return;		//31字节
	if (SCSICBW->dSignature!=0x55534243) return;	//包标记  USBC
	//验证CBW有意义
	if (SCSICBW->bLUN>SCSI_MAX_LUN) return;			//错误的LUN
	if (SCSICBW->bCBLength>0x10) return;				//CBWCB长度错误
	switch (SCSICBW->CBWCB[0])
	{
		case SCSI_CMD_INQUIRY			:
			SCSIInquiry();
			USBEP2WritePacket();
			SCSICSWProcess(SCSI_CSW_PASSED,0);
			break;
		case SCSI_CMD_READ10			:
			SCSIRead10();
			SCSICSWProcess(SCSI_CSW_PASSED,0);
			break;
		case SCSI_CMD_WRITE10			:
			SCSIWrite10();
			SCSICSWProcess(SCSI_CSW_PASSED,0);
			break;
		case SCSI_CMD_READ_LONG			:
			SCSIReadLong();
			USBEP2WritePacket();
			SCSICSWProcess(SCSI_CSW_PASSED,SCSICBW->dDataLength - USBEP1Buffer.OutLength);
			break;
		case SCSI_CMD_READ_CAPACITY		:
//			printf("request CAPACITY\n");
			SCSIReadCapacity();
			USBEP2WritePacket();
			SCSICSWProcess(SCSI_CSW_PASSED,0);
			break;
		case SCSI_CMD_TEST_UNIT_READY	:
			SCSICSWProcess(SCSI_CSW_PASSED,0);
			break;
		case SCSI_CMD_REQUEST_SENSE		:
			printf("request sense\n");
			SCSIRequestSense();
			break;
		case SCSI_CMD_MODE_SENSE6		:
			SCSIModeSense6();
			USBEP2WritePacket();
//			UEPNUM=0x02;
//			USB_SEND_STALL_PACKET;
			SCSICSWProcess(SCSI_CSW_PASSED,0xbc);
			break;
	}

}