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-rw-r--r--src/kernel/ao_data.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/kernel/ao_data.h b/src/kernel/ao_data.h
index 8f75ad87..6ee0965d 100644
--- a/src/kernel/ao_data.h
+++ b/src/kernel/ao_data.h
@@ -269,6 +269,10 @@ typedef int16_t accel_t;
#define AO_ACCEL_INVERT 4095
+#ifndef AO_MMA655X_INVERT
+#error AO_MMA655X_INVERT not defined
+#endif
+
#define ao_data_accel(packet) ((packet)->mma655x)
#if AO_MMA655X_INVERT
#define ao_data_accel_cook(packet) (AO_ACCEL_INVERT - (packet)->mma655x)