diff --git a/demos/ARMCM4-STM32F303-DISCOVERY/chconf.h b/demos/ARMCM4-STM32F303-DISCOVERY/chconf.h
index 8e9187455..ad7cc685a 100644
--- a/demos/ARMCM4-STM32F303-DISCOVERY/chconf.h
+++ b/demos/ARMCM4-STM32F303-DISCOVERY/chconf.h
@@ -40,8 +40,17 @@
  * @details Frequency of the system timer that drives the system ticks. This
  *          setting also defines the system tick time unit.
  */
-#if !defined(CH_CFG_FREQUENCY) || defined(__DOXYGEN__)
-#define CH_CFG_FREQUENCY                    10000
+#if !defined(CH_CFG_ST_FREQUENCY) || defined(__DOXYGEN__)
+#define CH_CFG_ST_FREQUENCY                 10000
+#endif
+
+/**
+ * @brief   Realtime Counter frequency.
+ * @details Frequency of the system counter used for realtime delays and
+ *          measurements.
+ */
+#if !defined(CH_CFG_RTC_FREQUENCY) || defined(__DOXYGEN__)
+#define CH_CFG_RTC_FREQUENCY                72000000
 #endif
 
 /**
diff --git a/os/halnew/osal/chibios/osal.h b/os/halnew/osal/chibios/osal.h
index 9c6170d4b..ca3c3f8b5 100644
--- a/os/halnew/osal/chibios/osal.h
+++ b/os/halnew/osal/chibios/osal.h
@@ -95,7 +95,7 @@
 /**
  * @brief   Required systick frequency or resolution.
  */
-#define OSAL_SYSTICK_FREQUENCY              CH_CFG_FREQUENCY
+#define OSAL_SYSTICK_FREQUENCY              CH_CFG_ST_FREQUENCY
 
 /*===========================================================================*/
 /* Module pre-compile time settings.                                         */
@@ -123,6 +123,13 @@ typedef int32_t msg_t;
 typedef uint32_t systime_t;
 #endif
 
+#if 0
+/**
+ * @brief   Type of realtime counter.
+ */
+typedef uint32_t rtcnt_t;
+#endif
+
 /**
  * @brief   Type of a thread reference.
  */
@@ -309,6 +316,20 @@ static inline void osalSysUnlockFromISR(void) {
   chSysUnlockFromISR();
 }
 
+/**
+ * @brief   Polled delay.
+ * @note    The real delay is always few cycles in excess of the specified
+ *          value.
+ *
+ * @param[in] cycles    number of cycles
+ *
+ * @xclass
+ */
+static inline void osalSysPolledDelayX(rtcnt_t cycles) {
+
+  chSysPolledDelayX(cycles);
+}
+
 /**
  * @brief   Systick callback for the underlying OS.
  * @note    This callback is only defined if the OSAL requires such a
diff --git a/os/halnew/platforms/STM32F30x/adc_lld.c b/os/halnew/platforms/STM32F30x/adc_lld.c
index e951df14e..009f4dde3 100644
--- a/os/halnew/platforms/STM32F30x/adc_lld.c
+++ b/os/halnew/platforms/STM32F30x/adc_lld.c
@@ -89,7 +89,7 @@ static void adc_lld_vreg_on(ADCDriver *adcp) {
 #if STM32_ADC_DUAL_MODE
   adcp->adcs->CR = ADC_CR_ADVREGEN_0;
 #endif
-  halPolledDelay(US2RTT(10));
+  osalSysPolledDelayX(US2RTC(10));
 }
 
 /**
diff --git a/os/kernel/include/chsys.h b/os/kernel/include/chsys.h
index 9eaf5d8e6..2d7cfa430 100644
--- a/os/kernel/include/chsys.h
+++ b/os/kernel/include/chsys.h
@@ -109,75 +109,71 @@
  * @details Converts from seconds to realtime counter cycles.
  * @note    The result is rounded upward to the next tick boundary.
  *
- * @param[in] freq      realtime counter operating frequency
  * @param[in] sec       number of seconds
  * @return              The number of cycles.
  *
  * @api
  */
-#define S2RTV(freq, sec) ((freq) * (sec))
+#define S2RTV(sec) (CH_CFG_RTC_FREQUENCY * (sec))
 
 /**
  * @brief   Milliseconds to realtime counter.
  * @details Converts from milliseconds to realtime counter cycles.
  * @note    The result is rounded upward to the next tick boundary.
  *
- * @param[in] freq      realtime counter operating frequency
  * @param[in] msec      number of milliseconds
  * @return              The number of cycles.
  *
  * @api
  */
-#define MS2RTC(freq, msec) (rtcnt_t)((((freq) + 999UL) / 1000UL) * (msec))
+#define MS2RTC(msec) (rtcnt_t)(((CH_CFG_RTC_FREQUENCY + 999UL) /            \
+                                1000UL) * (msec))
 
 /**
  * @brief   Microseconds to realtime counter.
  * @details Converts from microseconds to realtime counter cycles.
  * @note    The result is rounded upward to the next tick boundary.
  *
- * @param[in] freq      realtime counter operating frequency
  * @param[in] usec      number of microseconds
  * @return              The number of cycles.
  *
  * @api
  */
-#define US2RTC(freq, usec) (rtcnt_t)((((freq) + 999999UL) / 1000000UL) * (usec))
+#define US2RTC(usec) (rtcnt_t)(((CH_CFG_RTC_FREQUENCY + 999999UL) /         \
+                                1000000UL) * (usec))
 
 /**
  * @brief   Realtime counter cycles to seconds.
  * @details Converts from realtime counter cycles number to seconds.
  *
- * @param[in] freq      realtime counter operating frequency
  * @param[in] n         number of cycles
  * @return              The number of seconds.
  *
  * @api
  */
-#define RTC2S(freq, n) (rtcnt_t)((n) / (freq))
+#define RTC2S(n) (rtcnt_t)(CH_CFG_RTC_FREQUENCY / (freq))
 
 /**
  * @brief   Realtime counter cycles to milliseconds.
  * @details Converts from realtime counter cycles number to milliseconds.
  *
- * @param[in] freq      realtime counter operating frequency
  * @param[in] n         number of cycles
  * @return              The number of milliseconds.
  *
  * @api
  */
-#define RTC2MS(freq, n) ((n) / ((freq) / 1000UL))
+#define RTC2MS(n) ((n) / (CH_CFG_RTC_FREQUENCY / 1000UL))
 
 /**
  * @brief   Realtime counter cycles to microseconds.
  * @details Converts from realtime counter cycles number to microseconds.
  *
- * @param[in] freq      realtime counter operating frequency
  * @param[in] n         number of cycles
  * @return              The number of microseconds.
  *
  * @api
  */
-#define RTC2US(freq, n) ((n) / ((freq) / 1000000UL))
+#define RTC2US(n) ((n) / (CH_CFG_RTC_FREQUENCY / 1000000UL))
 /** @} */
 
 /**
diff --git a/os/kernel/include/chvt.h b/os/kernel/include/chvt.h
index 10168a66e..75823f954 100644
--- a/os/kernel/include/chvt.h
+++ b/os/kernel/include/chvt.h
@@ -41,12 +41,12 @@
 /* Derived constants and error checks.                                       */
 /*===========================================================================*/
 
-#if CH_CFG_FREQUENCY <= 0
-#error "invalid CH_CFG_FREQUENCY specified"
+#if CH_CFG_ST_FREQUENCY <= 0
+#error "invalid CH_CFG_ST_FREQUENCY specified"
 #endif
 
 #if (CH_CFG_TIMEDELTA < 0) || (CH_CFG_TIMEDELTA == 1)
-#error "invalid NIL_CFG_TIMEDELTA specified"
+#error "invalid CH_CFG_TIMEDELTA specified"
 #endif
 
 #if (CH_CFG_TIMEDELTA > 0) && (CH_CFG_TIME_QUANTUM > 0)
@@ -125,7 +125,7 @@ struct virtual_timer {
  * @api
  */
 #define S2ST(sec)                                                           \
-  ((systime_t)((uint32_t)(sec) * (uint32_t)CH_CFG_FREQUENCY))
+  ((systime_t)((uint32_t)(sec) * (uint32_t)CH_CFG_ST_FREQUENCY))
 
 /**
  * @brief   Milliseconds to system ticks.
@@ -138,8 +138,8 @@ struct virtual_timer {
  * @api
  */
 #define MS2ST(msec)                                                         \
-  ((systime_t)(((((uint32_t)(msec)) * ((uint32_t)CH_CFG_FREQUENCY) - 1UL) /     \
-                1000UL) + 1UL))
+  ((systime_t)(((((uint32_t)(msec)) *                                       \
+                 ((uint32_t)CH_CFG_ST_FREQUENCY) - 1UL) / 1000UL) + 1UL))
 
 /**
  * @brief   Microseconds to system ticks.
@@ -152,8 +152,8 @@ struct virtual_timer {
  * @api
  */
 #define US2ST(usec)                                                         \
-  ((systime_t)(((((uint32_t)(usec)) * ((uint32_t)CH_CFG_FREQUENCY) - 1UL) /     \
-                1000000UL) + 1UL))
+  ((systime_t)(((((uint32_t)(usec)) *                                       \
+                 ((uint32_t)CH_CFG_ST_FREQUENCY) - 1UL) / 1000000UL) + 1UL))
 /** @} */
 
 /*===========================================================================*/