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-rw-r--r--src/core/ao_data.h4
-rw-r--r--src/telemetrum-v2.0/ao_pins.h1
2 files changed, 5 insertions, 0 deletions
diff --git a/src/core/ao_data.h b/src/core/ao_data.h
index b0f086f8..c873e9d3 100644
--- a/src/core/ao_data.h
+++ b/src/core/ao_data.h
@@ -272,7 +272,11 @@ typedef int16_t accel_t;
/* MMA655X is hooked up so that positive values represent negative acceleration */
#define ao_data_accel(packet) ((packet)->mma655x)
+#if AO_MMA655X_INVERT
+#define ao_data_accel_cook(packet) (4095 - (packet)->mma655x)
+#else
#define ao_data_accel_cook(packet) ((packet)->mma655x)
+#endif
#define ao_data_set_accel(packet, accel) ((packet)->mma655x = (accel))
#define ao_data_accel_invert(accel) (4095 - (accel))
diff --git a/src/telemetrum-v2.0/ao_pins.h b/src/telemetrum-v2.0/ao_pins.h
index 04cce99e..a7236b80 100644
--- a/src/telemetrum-v2.0/ao_pins.h
+++ b/src/telemetrum-v2.0/ao_pins.h
@@ -257,6 +257,7 @@ struct ao_adc {
#define AO_MMA655X_SPI_INDEX AO_SPI_1_PB3_PB4_PB5
#define AO_MMA655X_CS_PORT (&stm_gpiob)
#define AO_MMA655X_CS_PIN 9
+#define AO_MMA655X_INVERT 1
#define NUM_CMDS 16