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authorgdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>2012-01-04 08:46:11 +0000
committergdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>2012-01-04 08:46:11 +0000
commitefa92aaed21cbaa80f4bc88a0ef9bb6bbb7aa3ee (patch)
tree8289e84ce53bd72e8ef1637472430286306222ea /os/hal/platforms/STM32L1xx/hal_lld.h
parentb799bdc5c5874fdcfc0e9c33cde779c774ada73f (diff)
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Realtime counter support in the generic HAL driver and implementations for al STM32 devices, others will follow.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3723 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/STM32L1xx/hal_lld.h')
-rw-r--r--os/hal/platforms/STM32L1xx/hal_lld.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32L1xx/hal_lld.h b/os/hal/platforms/STM32L1xx/hal_lld.h
index fce1a80f6..4bbe2fe76 100644
--- a/os/hal/platforms/STM32L1xx/hal_lld.h
+++ b/os/hal/platforms/STM32L1xx/hal_lld.h
@@ -971,10 +971,43 @@
/* Driver data structures and types. */
/*===========================================================================*/
+/**
+ * @brief Type representing a system clock frequency.
+ */
+typedef uint32_t halclock_t;
+
+/**
+ * @brief Type of the realtime free counter value.
+ */
+typedef uint32_t halrtcnt_t;
+
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
+/**
+ * @brief Returns the current value of the system free running counter.
+ * @note This service is implemented by returning the content of the
+ * DWT_CYCCNT register.
+ *
+ * @return The value of the system free running counter of
+ * type halrtcnt_t.
+ *
+ * @notapi
+ */
+#define hal_lld_get_counter_value() DWT_CYCCNT
+
+/**
+ * @brief Realtime counter frequency.
+ * @note The DWT_CYCCNT register is incremented directly by the system
+ * clock so this function returns STM32_SYSCLK.
+ *
+ * @return The realtime counter frequency of type halclock_t.
+ *
+ * @notapi
+ */
+#define hal_lld_get_counter_frequency() STM32_SYSCLK
+
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/