initiator_mode_rd.c

基于FAS466的SCSI控制器的启动器模式的C源代码。

#define	GLB extern

#include <stdio.h>
#include <conio.h>
#include <sys\types.h>
#include <sys\timeb.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>

#include "fas466defs.h"
#include "fas466regs.h"
#include "fas466globalvars.h"

void Initiator_Mode_rd()
{
		unsigned long Word_Cnt = 0;
		unsigned short Temp_data = 0;
		unsigned char FIFOCount = 0;
		unsigned short tempval;


    printf("    Set Up to Receive Data \n");
        // read the data back and verify it.
	RegWrite(SC_FIFO , 0x80) ;  // msg1
    RegWrite(SC_FIFO , 0x8) ;  // cdb1
	RegWrite(SC_FIFO , 0x0) ;  // cdb2
    RegWrite(SC_FIFO , 0x0) ;  // cdb3
	RegWrite(SC_FIFO , 0x0) ;  // cdb4
    RegWrite(SC_FIFO , BlockCnt) ;  // cdb5
	RegWrite(SC_FIFO , 0x0) ;  // cdb6

        verify (SC_FIFO_Count  , 0x7) ;
		printf("      Issue SelWAtn Command (1 messages) \n");
        RegWrite(SC_Command , SC_CMD_Select1_With_ATN_Seq) ;
		ExpCmdCmptStat = SC_Function_Complete;	
		Cmd_Complete466();

        verifym(SC_SCSI_Control,SC_CTRL_PhaseMask,SC_CTRL_DataInPhase );
       
//		*************   SET UP THE EXTERNAL DMA MODULE   ********************
	
	Word_Cnt = (BlockCnt * BlockSize) / 0x2;
	IsaWrite((unsigned short) RAM_ADDR_LO, (unsigned short) (Word_Cnt & 0x0FF));
	IsaWrite((unsigned short) RAM_ADDR_HI, (unsigned short) ((Word_Cnt & 0xFF00) >> 8));
	tempval = IsaRead((unsigned short) EVAL_CONFIG);
	IsaWrite((unsigned short) EVAL_CONFIG, (unsigned short) (tempval | Load_Counter));
	IsaWrite((unsigned short) EVAL_CONFIG, tempval);
    IsaWrite((unsigned short) EVAL_CONFIG, (unsigned short) (tempval & ~Send_Data));

//		*********************   Set up the SCSI Controller  ******************

		RegWrite(SC_Block_Size , BlockSize) ;
		RegWrite(SC_Block_Count_Counter , BlockCnt) ;   //

		RegWrite(SC_Command , SC_CMD_Xfer_Information_DMA) ;
		ExpCmdCmptStat =  SC_Function_Complete | SC_Bus_Service;	//
		Cmd_Complete466();

        verifym(SC_Command_Status ,0xff, 0x0);
        verifym(SC_SCSI_Control ,0xfffc, SC_CTRL_StatusPhase | SC_REQ | SC_EIGS) ;
        verifym(SC_FIFO_Count ,0xff,0x0);     // fifo should be empty
//        SetChkMem(0, ((BlockCnt*BlockSize)+ 1)/2, pattern, type,1);  //check pattern

//-------------------------------------------------------------------------------
	printf("      Receive Status & msg / Disco\n");
//-------------------------------------------------------------------------------

		RegWrite(SC_Command , SC_CMD_Xfer_Information_Non_DMA); // receive status byte
		ExpCmdCmptStat = SC_Function_Complete | SC_Bus_Service;	
		Cmd_Complete466();

        verifym(SC_SCSI_Control, SC_CTRL_PhaseMask , SC_CTRL_MsgInPhase) ;
        verify (SC_FIFO_Count , 0x1) ;
        verifym(SC_FIFO ,0xff , 0x0) ;  // status

		RegWrite(SC_Command , SC_CMD_Xfer_Information_Non_DMA) ;     // receive message byte
		ExpCmdCmptStat = SC_Function_Complete;	
		Cmd_Complete466();

        verifym(SC_SCSI_Control ,SC_CTRL_PhaseMask, SC_CTRL_MsgInPhase) ;
        verify (SC_FIFO_Count ,0x1) ;
        verifym(SC_FIFO ,0xff, 0x0 );  // msg

		RegWrite(SC_Command , SC_CMD_Message_Accepted);
		ExpCmdCmptStat = SC_Function_Complete | SC_SCSI_Disconnect;	
		Cmd_Complete466();

        verifym(SC_SCSI_Control ,SC_CTRL_PhaseMask,SC_CTRL_BusFreePhase );

		RegWrite(SC_Command , SC_CMD_Enable_Selection_Reslection) ;

}