+#if IGNITE_ON_P2
+#define AO_IGNITER_PORT P2
+#define AO_IGNITER_DROGUE_PORT AO_IGNITER_PORT
+#define AO_IGNITER_DROGUE P2_3
+#define AO_IGNITER_MAIN P2_4
+#define AO_IGNITER_DIR P2DIR
+#define AO_IGNITER_DROGUE_BIT (1 << 3)
+#define AO_IGNITER_MAIN_BIT (1 << 4)
+#define AO_IGNITER_DROGUE_PIN 3
+#define AO_IGNITER_MAIN_PIN 4
+#endif
+
+#if IGNITE_ON_P0
+#define AO_IGNITER_PORT P0
+#define AO_IGNITER_DROGUE P0_5
+#define AO_IGNITER_MAIN P0_4
+#define AO_IGNITER_DIR P0DIR
+#define AO_IGNITER_DROGUE_BIT (1 << 5)
+#define AO_IGNITER_MAIN_BIT (1 << 4)
+#define AO_IGNITER_DROGUE_PIN 5
+#define AO_IGNITER_MAIN_PIN 4
+#endif
+
+#define AO_IGNITER_DROGUE_PORT AO_IGNITER_PORT
+#define AO_IGNITER_MAIN_PORT AO_IGNITER_PORT
+
+/* test these values with real igniters */
+#define AO_IGNITER_OPEN 1000
+#define AO_IGNITER_CLOSED 7000
+#define AO_IGNITER_FIRE_TIME AO_MS_TO_TICKS(50)
+#define AO_IGNITER_CHARGE_TIME AO_MS_TO_TICKS(2000)
+
+struct ao_adc {
+ int16_t accel; /* accelerometer */
+ int16_t pres; /* pressure sensor */
+ int16_t temp; /* temperature sensor */
+ int16_t v_batt; /* battery voltage */
+ int16_t sense_d; /* drogue continuity sense */
+ int16_t sense_m; /* main continuity sense */
+#if HAS_ACCEL_REF
+ uint16_t accel_ref; /* acceleration reference */
+#endif
+};
+
+/*
+ * Voltage divider on ADC battery sampler
+ */
+#define AO_BATTERY_DIV_PLUS 5 /* 5k */
+#define AO_BATTERY_DIV_MINUS 10 /* 10k */
+
+/*
+ * Voltage divider on ADC igniter samplers
+ */
+#define AO_IGNITE_DIV_PLUS 100 /* 100k */
+#define AO_IGNITE_DIV_MINUS 27 /* 27k */
+
+/*
+ * ADC reference in decivolts
+ */
+#define AO_ADC_REFERENCE_DV 33
+