analog.c

Go to the documentation of this file.

/* analog.c --- 
 * 
 * Filename: analog.c
 * Description: 
 * Author: Bryce Himebaugh
 * Maintainer: 
 * Created: Mon Oct 16 11:02:32 2006
 * Version: 
 * Last-Updated: 
 *           By: 
 *     Update #: 0
 * Keywords: 
 * Compatibility: 
 * 
 */

/* Commentary: 
 * 
 * 
 * 
 */

/* Change log:
 * 
 * 
 */

/* This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* Code: */

#include <msp430x16x.h>

void init_a2d(void) {
  // Setup the AD converter as follows:
 
  // %% ADC12CTRL0 %%
  // Sample-and-Hold Time - 4uS (32 SMCLK) - with Rs=1k -> 1.88uS is required
  // 2.5V internal reference - 5V external signals are divided by 2 before the op-amp buffer
  // MSC bit tells convert to immediately convert next channel after started by SHI
  // 
  ADC12CTL0 = SHT11+SHT10+SHT01+SHT00+MSC+REF2_5V+REFON+ADC12ON;  
  ADC12CTL1 = SHP+ADC12DIV2+ADC12DIV1+ADC12DIV0+ADC12SSEL1+ADC12SSEL0+CONSEQ1+CONSEQ0;
  ADC12MCTL0 = 0x10;  // AD0 
  ADC12MCTL1 = 0x11;  // AD1 
  ADC12MCTL2 = 0x12;  // AD2
  ADC12MCTL3 = 0x13;  // AD3
  ADC12MCTL4 = 0x14;  // AD4
  ADC12MCTL5 = 0x95;  // AD5 (End of Sample Sequence)
}

void init_dac(void) {
 DAC12_0CTL = DAC12LSEL_0 + DAC12IR + DAC12AMP_7 + DAC12ENC; 
 DAC12_1CTL = DAC12LSEL_0 + DAC12IR + DAC12AMP_7 + DAC12ENC; 
}

/* analog.c ends here */

---