Cirrus-logic AN118 Manual do Utilizador descarregar pdf (Página 17)

AN118

AN118REV2 17

low_byte = receive_byte();

TXSER(low_byte); /* Return bytes to PC */

TXSER(mid_byte);

TXSER(high_byte);

}

if (temp1 == 1 ){

do { /* Nothing*/} while (SDO !=0);/* Wait for SDO to fall */

transfer_byte(0xFF); /* Send all zeros */

for (j=0; j<sample_size; j++) {

high_byte = receive_byte();/* Receive last conversion */

mid_byte = receive_byte();

low_byte = receive_byte();

} /* END for */

} /* END if */

if(mode == 1) P1 = 0xF5; /* Set CSb */

COMM = 0x01; /* Turn off LED */

break;

/*****************************/

/* Read Channel-Setup Registers */

/*****************************/

case 0x0D:

COMM = 0x00; /* Turn on LED*/

sample_size = RXSER(); /* How many Registers? */

if(mode == 1) P1 = 0xF4; /* Clear CSb */

transfer_byte(command); /* Send command to A/D */

for (j=0; j<sample_size; j++) {

high_byte = receive_byte();/* Receive Bytes */

mid_byte = receive_byte();

low_byte = receive_byte();

TXSER(low_byte); /* Transfer data to PC */

TXSER(mid_byte);

TXSER(high_byte);

} /* END for loop */

if(mode == 1) P1 = 0xF5; /* Set CSb */

COMM = 0x01; /* Turn off LED*/

break;

/**********************/

/* Normal Conversions */

/**********************/

case 0x80: /* Normal Conversion on Setup 1 */

case 0x88: /* Normal Conversion on Setup 2 */

case 0x90: /* Normal Conversion on Setup 3 */

case 0x98: /* Normal Conversion on Setup 4 */

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Cirrus-logic AN118 Manual do Utilizador Página 17

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