Merge branch 'new-packet-format' of ssh://git.gag.com/scm/git/fw/altos into new-packa...

[fw/altos] / src / ao_adc.c

diff --git a/src/ao_adc.c b/src/ao_adc.c
index a8784667c52490fea86d48077c2b8e02d686c677..49d2519e209d5c4f2faf594c5afb08da9da42af6 100644 (file)
--- a/src/ao_adc.c
+++ b/src/ao_adc.c
@@ -16,6 +16,7 @@
  */
 
 #include "ao.h"
+#include "ao_pins.h"
 
 volatile __xdata struct ao_adc ao_adc_ring[AO_ADC_RING];
 volatile __data uint8_t                ao_adc_head;
@@ -40,18 +41,26 @@ ao_adc_get(__xdata struct ao_adc *packet)
 }
 
 void
-ao_adc_isr(void) interrupt 1
+ao_adc_isr(void) __interrupt 1
 {
        uint8_t sequence;
        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);
        a[0] = ADCL;
        a[1] = ADCH;
        if (sequence < 5) {
+#if HAS_EXTERNAL_TEMP == 0
                /* start next channel conversion */
-               ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | (sequence + 1);
+               /* v0.2 replaces external temp sensor with internal one */
+               if (sequence == 1)
+                       ADCCON3 = ADCCON3_EREF_1_25 | ADCCON3_EDIV_512 | ADCCON3_ECH_TEMP;
+               else
+#endif
+                       ADCCON3 = ADCCON3_EREF_VDD | ADCCON3_EDIV_512 | (sequence + 1);
        } else {
                /* record this conversion series */
                ao_adc_ring[ao_adc_head].tick = ao_time();
@@ -80,7 +89,9 @@ ao_adc_init(void)
 {
        ADCCFG = ((1 << 0) |    /* acceleration */
                  (1 << 1) |    /* pressure */
-                 (1 << 2) |    /* temperature */
+#if HAS_EXTERNAL_TEMP
+                 (1 << 2) |    /* v0.1 temperature */
+#endif
                  (1 << 3) |    /* battery voltage */
                  (1 << 4) |    /* drogue sense */
                  (1 << 5));    /* main sense */