/* ----------------------------------------------------------- */
/* demo 7 : test RS-232 port (single VXC-112A + PC-COM1)       */
/* step 1 : RS-232 port of vxc112A connect to COM1 of PC       */
/* step 2 : run DEMO7.EXE				                       */
/* NOTE   : PC_COM1=send=polling,   receive=polling	           */
/*	    Vxc112A=send=interrupt, receive=interrupt	           */
/* ----------------------------------------------------------- */

#include "..\PIO.H"
#include "..\VxCard.h"
#define COM1	  0x3f8
#define COM2	  0x2f8
#define COM3	  0x3e8
#define COM4	  0x2e8

#define A1_8259   0x20
#define A2_8259   0xA0
#define EOI	      0x20

#define A1_8259   0x20
#define A2_8259   0xA0
#define EOI	      0x20
#define LLL	      64

WORD init_low();
WORD restore_int();
void interrupt (*oldfunc) ();
static void interrupt irq_service();
int  rs232_val,rs232_status,irqmask,now_int_state;
char buf[1000];
WORD front,rear;

WORD wBase,wIrq,wBase0,wBase1,wA0,wA1;
WORD wT=32000;

int main()
{
    int   t,tt,i,j,ii,jj,k,i2,j2;
    char  c;
    char  cCmd[50];
    int   iRet,iComPort;
    DWORD dd;
    WORD  wSubVendor,wSubDevice,wSubAux,wSlotBus,wSlotDevice;
	WORD  wBoards,wRetVal,t1,t2,t3,t4,t5,t0,tt0,tt1;

	clrscr();
	/* step 1: find address-mapping of PIO/PISO cards		  */
	wRetVal=PIO_DriverInit(&wBoards,0x1D61,0x00,0x00);  /* for VXC-112A */
	printf("\nThrer are %d VXC-112A Cards in this PC; Ret=%d",wBoards, wRetVal);
    if (wBoards==0) return 1;

    printf("\n--------------- The Configuration Space ---------------");
    for(i=0; i<wBoards; i++)
    {
        PIO_GetConfigAddressSpace(i,&wBase,&wIrq,&wSubVendor,&wSubDevice,
                &wSubAux,&wSlotBus,&wSlotDevice);
		printf("\nCard_%d: wBase=%x,wIrq=%x,subID=[%x,%x],SlotID=[%x,%x]",i,wBase,wIrq,wSubVendor,wSubDevice,wSlotBus,wSlotDevice);
		printf(" --> ");
		ShowPioPiso(wSubVendor,wSubDevice,wSubAux);
    }

    PIO_GetConfigAddressSpace(0,&wBase,&wIrq,&t1,&t2,&t3,&t4,&t5);

    /* step 2: enable all D/I/O port				   */
    outportb(wBase,1);				         /* enable D/I/O  */
    Vxc_SetConfig(wBase, VXC_112A_CONFIG);   /* for VXC-112A */
    Vxc_SetLed(wBase, VXC_112A_LED_ON); 	 /* led on	   */
    Vxc_SetSpeedMode(wBase,1,VXC_LOW_SPEED); /* low speed	   */

    printf("\ninit 1");
    init_low();
	printf("\ninit 2\n");

	/* step 3: select port  */
	printf("Please select 1:Port1, or other keys:Port2\n");
    wA1=wBase + ( '1' == getch()? VXC_PORT1 : VXC_PORT2 );

    iRet=Vxc_OpenCom(wA1,115200L, "8N1");   /* RS-232 of VXC-112A=115200	   */
    if (iRet==0) printf("\n\n(1) Open card_0 OK");
	else         printf("\niRET=%d",iRet);

    iRet=Vxc_OpenCom(COM1, 115200L, "8N1");   /* RS_232 of PC-COM1=115200	   */
    if (iRet==0) printf("\n\n(1) Open PC COM OK");
	else         printf("\niRET=%d",iRet);

	outportb(wA1 + VXC_IER, 1);

    i=0x55; j=0xaa; rs232_status=0;
    for (;;)
    {
        t0=0; t1=0; tt0=0; tt1=0; i2=0; j2=0;

        for (t1=0; t1<LLL; t1++) Vxc_SendRs232(j+t1);

		for (;;)
        {
            if (t0<LLL)
            {
                if ( 0 == Vxc_SendChar(COM1, i+t0, 2) ) /* pc-send=polling */
					t0++;
            }

            if ( 0 == Vxc_ReceiveChar(COM1, &k, 2) )    /* pc-receive=polling */
            {
	            k-=(j+j2)&0xff;
				if (k!=0) {
                    printf("[Err0,%2x,%2x]",k,j); 
                    return 1; 
                }
	            tt0++; j2++;
	        }

			if (rs232_status==1)		/* vxc-112A-receive=interrupt */
	        {
                k=rs232_val;
	            k-=(i+i2)&0xff;
			    rs232_status=0;
			    if (k!=0) {
                    printf("[Err1,%2x,%2x]",k,i); 
                    return 1; 
                }
			    tt1++; i2++;
	        }
            if ((tt0>=LLL) && (tt1>=LLL)) 
                break;
		}

        i++; i=i&0xff;
        j++; j=j&0xff;
        if (kbhit()!=0) {getch(); break;}
        printf("\n[i=%2x, j=%2x] [front=%d, rear=%d",i,j,front,rear);
    }

    restore_int();
    PIO_DriverClose();
	return 0;
}

/* -------------------------------------------------------------- */

WORD init_low()
{
    DWORD dwVal;

    disable();
    outportb(wBase+5,0);			 /* disable all interrupt */

    if (wIrq<8)
    {
        oldfunc=getvect(wIrq+8);
        irqmask=inportb(A1_8259+1);
		outportb(A1_8259+1,irqmask & (0xff ^ (1 << wIrq)));
        setvect(wIrq+8, irq_service);
    } else {
        oldfunc=getvect(wIrq-8+0x70);
        irqmask=inportb(A1_8259+1);
		outportb(A1_8259+1,irqmask & 0xfb);			  /* IRQ2 */
		irqmask=inportb(A2_8259+1);
		outportb(A2_8259+1,irqmask & (0xff ^ (1 << (wIrq-8))));
		setvect(wIrq-8+0x70, irq_service);
	}

	outportb(wBase+0x2a,12); 	       /* non-invert COM1	  */
	now_int_state=0x0;		           /* now COM1 is low	  */
	outportb(wBase+5,12);		       /* enable DI1 interrupt	  */
	enable();

	front=rear=0;			           /* send queue empty	  */
	return 0;
}

/* -------------------------------------------------------------- */

WORD restore_int()
{
	disable();

	outportb(wBase+5,0);			 /* disable all interrupt */
	if (wIrq<8)
	{
		setvect(wIrq+8,oldfunc);
	} else {
		setvect(wIrq-8+0x70,oldfunc);
	}
	return 0;
}

/* -------------------------------------------------------------- */

void interrupt irq_service()
{
	WORD data;

	Vxc_SetLed(wBase, VXC_LED_OFF); 	/* led OFF	 */
	switch(inportb(wA1+VXC_IIR)&0x07)
	{
	case 0 : break;
	case 1 : goto end;
	case 2 : /* send data    */
		if (front!=rear)
		{
			if (rear<900) rear++; else rear=0;
			data=buf[rear]&0xff;
			outportb(wA1 + VXC_THR, data);
			if (front==rear) outportb(wA1 + VXC_IER,0x01);
		} else
			outportb(wA1 + VXC_IER,0x01);
		   break;
	case 4 : /* receive data */
		rs232_status=1;
		rs232_val=inportb(wA1);
		break;
	default: goto end;
	}

end:
	if (wIrq>=8) outportb(A2_8259,0x20);
	outportb(A1_8259,0x20);
	Vxc_SetLed(wBase, VXC_112A_LED_ON); 	/* led ON	 */
}

/* -------------------------------------------------------------- */

Vxc_SendRs232(int data)
{
	if (front<900) front++; else front=0;
	buf[front]=data;
	outportb(wA1+VXC_IER,0x03);
	return 0;
}