Contec DAI12-4FITGY, Руководство пользователя, Страница: 44 / 65

Using the I/O Address Map
DAI12-4(FIT)GY
39
/* ----- Initialize ------------------------------------ */
void Initialize( void )
{
outp( ADR+0x18, 0x00 ); /* Initialize */
outp( ADR+0x18, 0x02 ); /* D/A Conversion Mode */
outp( ADR+0x1c, 0x05 ); /* Software */
outp( ADR+0x18, 0x03 ); /* Range */
outp( ADR+0x1c, 0x00 ); /* -10 to 10V */
outp( ADR+0x18, 0x04 ); /* Timer Data */
outp( ADR+0x1c, 0xff ); /* 250ns x 4,000,000 */
outp( ADR+0x1d, 0x08 );
outp( ADR+0x1e, 0x3d );
outp( ADR+0x1f, 0x00 );
outp( ADR+0x18, 0x01 ); /* Interrupt Factor */
outp( ADR+0x1c, 0xef );
/* Sampling Clock Input Mask OFF */
}
/* ----- change vector --------------------------------- */
void ChgVect( void )
{
OrgVect = _dos_getvect( IntVector[IrqLevel] );
_disable();
_dos_setvect( IntVector[IrqLevel], inthandler );
if ( IrqLevel > IRQ7 ) { /* IMR and mask clear */
outp( 0x21, ( OrgMasterImr = inp( 0x21 ) ) & 0xfb );
outp( 0xa1, ( OrgSlaveImr = inp( 0xa1 ) ) &
PicMask[IrqLevel] );
outp( 0x20, 0x62 ); /* ISR clear (master) */
outp( 0xa0, IsrClear[IrqLevel] );
/* ISR clear (slave) */
} else { /* IMR and mask clear */
outp( 0x21, ( OrgMasterImr = inp( 0x21 ) ) &
PicMask[IrqLevel] );
outp( 0x20, IsrClear[IrqLevel] );
/* ISR clear */
}
_enable(); /* enable */
}
/* ----- restore vector -------------------------------- */
void ResVect( void )
{
_disable(); /* disable */
if ( IrqLevel > IRQ7 ) { /* restore IMR */
outp( 0x21, OrgMasterImr );
outp( 0xa1, OrgSlaveImr );
} else
outp( 0x21, OrgMasterImr );
_dos_setvect( IntVector[IrqLevel], OrgVect );
/* restore orgvect */
_enable(); /* enable */
}