Force idle mode by shorting the SPI clock to ground at boot time.
authorKeith Packard <keithp@keithp.com>
Sun, 10 Jan 2010 06:06:19 +0000 (22:06 -0800)
committerKeith Packard <keithp@keithp.com>
Sun, 10 Jan 2010 06:06:19 +0000 (22:06 -0800)
This allows you to override the flight mode detection code in case the
accelerometer calibration is broken somehow. Hold the SPI clock shoted
to ground until the LED comes on, then remove it.

Signed-off-by: Keith Packard <keithp@keithp.com>
src/ao.h
src/ao_flight.c
src/ao_telemetrum.c

index 1f27fe9..2c6eb2b 100644 (file)
--- a/src/ao.h
+++ b/src/ao.h
@@ -618,6 +618,7 @@ extern __pdata int16_t                      ao_ground_pres;
 extern __pdata int16_t                 ao_ground_accel;
 extern __pdata int16_t                 ao_min_pres;
 extern __pdata uint16_t                        ao_launch_time;
+extern __xdata uint8_t                 ao_flight_force_idle;
 
 /* Flight thread */
 void
index f57573d..e0fd97f 100644 (file)
@@ -50,6 +50,8 @@ __data uint8_t ao_flight_adc;
 __pdata int16_t ao_raw_accel, ao_raw_accel_prev, ao_raw_pres;
 __pdata int16_t ao_accel_2g;
 
+__xdata uint8_t ao_flight_force_idle;
+
 /* Accelerometer calibration
  *
  * We're sampling the accelerometer through a resistor divider which
@@ -221,8 +223,10 @@ ao_flight(void)
 
                        /* Go to pad state if the nose is pointing up */
                        ao_config_get();
-                       if (ao_config.accel_plus_g != 0 && ao_config.accel_minus_g != 0 &&
-                           ao_flight_accel < ao_config.accel_plus_g + ACCEL_NOSE_UP)
+                       if (ao_config.accel_plus_g != 0 &&
+                           ao_config.accel_minus_g != 0 &&
+                           ao_flight_accel < ao_config.accel_plus_g + ACCEL_NOSE_UP &&
+                           !ao_flight_force_idle)
                        {
                                /* Disable the USB controller in flight mode
                                 * to save power
index 0de3572..8974383 100644 (file)
@@ -29,10 +29,20 @@ main(void)
 {
        ao_clock_init();
 
+
        /* Turn on the red LED until the system is stable */
        ao_led_init(AO_LED_RED);
        ao_led_on(AO_LED_RED);
 
+       /* A hack -- look at the SPI clock pin, if it's sitting at
+        *  ground, then we force the computer to idle mode instead of
+        *  flight mode
+        */
+       if (P1_3 == 0) {
+               ao_flight_force_idle = 1;
+               while (P1_3 == 0)
+                       ;
+       }
        ao_timer_init();
        ao_adc_init();
        ao_beep_init();