Sensoray 518 Manuel d'utilisateur télécharger pdf (Page 16)

/******************************** C DRIVERS ****************************/

/* ADSENDBYTE handshakes a command byte to the 518 command register */

void adSendByte ( short base_port, short cmd_byte )

{

while ( ( inp( base_port + 1 ) & 128 ) == 0 ) ;

/* wait for CRMT */

outp ( base_port, cmd_byte ) ;/* send the byte */

}

/* ADREADBYTE handshakes a data byte from the 518 data register */

short adReadByte ( short base_port )

{

while ( ( inp ( base_port + 1 ) & 64 ) == 0 ) ; /* wait for DAV */

return ( inp ( base_port ) ) ; /* read the byte */

}

/* ADSENDWORD handshakes a 16-bit value to the 518 */

void adSendByte ( short base_port, short cmd_word )

{

adSendByte ( base_port, cmd_word >> 8 ) ; /* send high byte */

adSendByte ( base_port, cmd_word ) ; /* send low byte */

}

/* ADREADWORD handshakes a data byte from the 518 */

short adReadWord ( short base_port )

{

short hiByte = adReadByte ( base_port ) << 8 ; /* read high byte */

return ( hiByte | adReadByte ( base_port ) ) ; /* read & concatenate low byte */

}

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Sensoray 518 Manuel d'utilisateur Page 16