# define wait_us(us) _delay_us(us)
#elif defined PROTOCOL_CHIBIOS
# include "ch.h"
-# if defined(STM32F3xx_MCUCONF)
-# define wait_ms(ms) chSysPolledDelayX(MS2RTC(STM32_HCLK, (ms)))
-# define wait_us(us) chSysPolledDelayX(US2RTC(STM32_HCLK, (us)))
-# else
-# define wait_ms(ms) chThdSleepMilliseconds(ms)
-# define wait_us(us) chThdSleepMicroseconds(us)
-# endif
+# 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