# include <util/delay.h>
# define wait_ms(ms) _delay_ms(ms)
# define wait_us(us) _delay_us(us)
-#elif defined(PROTOCOL_CHIBIOS)
+#elif defined PROTOCOL_CHIBIOS
# include "ch.h"
# define wait_ms(ms) chThdSleepMilliseconds(ms)
# define wait_us(us) chThdSleepMicroseconds(us)
+#elif defined PROTOCOL_ARM_ATSAM
+# include "clks.h"
+# define wait_ms(ms) CLK_delay_ms(ms)
+# define wait_us(us) CLK_delay_us(us)
#elif defined(__arm__)
# include "wait_api.h"
#else // Unit tests