altos/arm: Align data so that gcc 5.4 doesn't do byte-accesses. Add -Wcast-align

[fw/altos] / src / stmf0 / ao_adc_fast.h

diff --git a/src/stmf0/ao_adc_fast.h b/src/stmf0/ao_adc_fast.h
index b8b5e003bd775b7ee50e77dc29fa70bd0b216386..3f0b0547dec790c244a20b6006ca3c2e18e0d32a 100644 (file)
--- a/src/stmf0/ao_adc_fast.h
+++ b/src/stmf0/ao_adc_fast.h
@@ -28,7 +28,7 @@ ao_adc_init(void);
 /* Total ring size in samples */
 #define AO_ADC_RING_SIZE       256
 
-extern uint16_t        ao_adc_ring[AO_ADC_RING_SIZE];
+extern uint16_t        ao_adc_ring[AO_ADC_RING_SIZE] __attribute__((aligned(4)));
 
 #define ao_adc_ring_step(pos,inc)      (((pos) + (inc)) & (AO_ADC_RING_SIZE - 1))