#include "ao_pins.h"
volatile __xdata struct ao_adc ao_adc_ring[AO_ADC_RING];
+#if HAS_ACCEL_REF
+volatile __xdata uint16_t ao_accel_ref[AO_ADC_RING];
+#endif
volatile __data uint8_t ao_adc_head;
void
ao_adc_poll(void)
{
+#if HAS_ACCEL_REF
+ ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | 2;
+#else
ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | 0;
+#endif
}
void
uint8_t __xdata *a;
sequence = (ADCCON2 & ADCCON2_SCH_MASK) >> ADCCON2_SCH_SHIFT;
- if (sequence == ADCCON3_ECH_TEMP)
- sequence = 2;
- a = (uint8_t __xdata *) (&ao_adc_ring[ao_adc_head].accel + sequence);
+#if HAS_ACCEL_REF
+ if (sequence == 2) {
+ a = (uint8_t __xdata *) (&ao_accel_ref[ao_adc_head]);
+ sequence = 0;
+ } else
+#endif
+ {
+ if (sequence == ADCCON3_ECH_TEMP)
+ sequence = 2;
+ a = (uint8_t __xdata *) (&ao_adc_ring[ao_adc_head].accel + sequence);
+ sequence++;
+ }
a[0] = ADCL;
a[1] = ADCH;
- if (sequence < 5) {
+ if (sequence < 6) {
#if HAS_EXTERNAL_TEMP == 0
/* start next channel conversion */
/* v0.2 replaces external temp sensor with internal one */
- if (sequence == 1)
+ if (sequence == 2)
ADCCON3 = ADCCON3_EREF_1_25 | ADCCON3_EDIV_512 | ADCCON3_ECH_TEMP;
else
#endif
- ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | (sequence + 1);
+ ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | sequence;
} else {
/* record this conversion series */
ao_adc_ring[ao_adc_head].tick = ao_time();