altos: Add telemetrum-v1.1 directory

[fw/altos] / src / ao_adc.c

diff --git a/src/ao_adc.c b/src/ao_adc.c
index 26209dcf1381904b5d68bd597db535e0ba3b7940..cd8550fdfaa61bc4aec471783d4c2fce5cb1832e 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;
@@ -39,19 +40,60 @@ ao_adc_get(__xdata struct ao_adc *packet)
        memcpy(packet, &ao_adc_ring[i], sizeof (struct ao_adc));
 }
 
+#ifdef HAS_ADC_5V
+static void
+ao_fix_accel(void)
+{
+       uint32_t        total;
+       uint8_t         adc_l, adc_h;
+       uint8_t         ref_l, ref_h;
+       uint8_t __xdata *p = (uint8_t __xdata *) &ao_adc_ring[ao_adc_head].accel;
+
+       ref_l = ADCL;
+       adc_l = p[0];
+       total = (uint32_t) (uint16_t) (adc_l * ref_l);
+
+       adc_h = p[1];
+       total += (uint32_t) (uint16_t) (adc_h * ref_l) << 8;
+
+       ref_h = ADCH;
+       total += (uint32_t) (uint16_t) (adc_l * ref_h) << 8;
+       total += (uint32_t) (uint16_t) (adc_h * ref_h) << 16;
+       *(uint16_t __xdata *) p = total >> 16;
+}
+#endif
+
 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 HAS_ADC_5V
+       if (sequence == 2) {
+               ao_fix_accel();
+               /* and launch the temp sensor next */
+               ADCCON3 = ADCCON3_EREF_1_25 | ADCCON3_EDIV_512 | ADCCON3_ECH_TEMP;
+               return;
+       }
+#endif
+#if HAS_EXTERNAL_TEMP
+       if (sequence == ADCCON3_ECH_TEMP)
+               sequence = 2;
+#endif
        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 && !HAS_ADC_5V
                /* 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();
@@ -61,13 +103,13 @@ ao_adc_isr(void) interrupt 1
 }
 
 static void
-ao_adc_dump(void)
+ao_adc_dump(void) __reentrant
 {
-       __xdata struct ao_adc   packet;
+       static __xdata struct ao_adc    packet;
        ao_adc_get(&packet);
-       printf("tick: %5u accel: %4d pres: %4d temp: %4d batt: %4d drogue: %4d main: %4d\n",
-              packet.tick, packet.accel >> 4, packet.pres >> 4, packet.temp >> 4,
-              packet.v_batt >> 4, packet.sense_d >> 4, packet.sense_m >> 4);
+       printf("tick: %5u accel: %5d pres: %5d temp: %5d batt: %5d drogue: %5d main: %5d\n",
+              packet.tick, packet.accel, packet.pres, packet.temp,
+              packet.v_batt, packet.sense_d, packet.sense_m);
 }
 
 __code struct ao_cmds ao_adc_cmds[] = {
@@ -80,7 +122,9 @@ 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 */