More enhancements to the GPT driver.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6759 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/hal/include/gpt.h

@@ -79,9 +79,7 @@ typedef void (*gptcallback_t)(GPTDriver *gptp);
 /**
  * @brief   Changes the interval of GPT peripheral.
  * @details This function changes the interval of a running GPT unit.
- * @pre     The GPT unit must have been activated using @p gptStart().
+ * @pre     The GPT unit must be running in continuous mode.
- * @pre     The GPT unit must have been running in continuous mode using
- *          @p gptStartContinuous().
  * @post    The GPT unit interval is changed to the new value.
  *
  * @param[in] gptp      pointer to a @p GPTDriver object
@@ -89,10 +87,34 @@ typedef void (*gptcallback_t)(GPTDriver *gptp);
  *
  * @iclass
  */
-#define gptChangeIntervalI(gptp, interval) {                                  \
+#define gptChangeIntervalI(gptp, interval) {                                \
-  gpt_lld_change_interval(gptp, interval);                                    \
+  gpt_lld_change_interval(gptp, interval);                                  \
 }
 
+/**
+ * @brief   Returns the interval of GPT peripheral.
+ * @pre     The GPT unit must be running in continuous mode.
+ *
+ * @param[in] gptp      pointer to a @p GPTDriver object
+ * @return              The current interval.
+ *
+ * @xclass
+ */
+#define gptGetIntervalX(gptp) gpt_lld_get_interval(gptp)
+
+/**
+ * @brief   Returns the counter value of GPT peripheral.
+ * @pre     The GPT unit must be running in continuous mode.
+ * @note    The nature of the counter is not defined, it may count upward
+ *          or downward, it could be continuously running or not.
+ *
+ * @param[in] gptp      pointer to a @p GPTDriver object
+ * @return              The current counter value.
+ *
+ * @xclass
+ */
+#define gptGetCounterX(gptp) gpt_lld_get_counter(gptp)
+
 /*===========================================================================*/
 /* External declarations.                                                    */
 /*===========================================================================*/

os/hal/ports/STM32/LLD/TIMv1/gpt_lld.h

@@ -432,19 +432,42 @@ struct GPTDriver {
 /**
  * @brief   Changes the interval of GPT peripheral.
  * @details This function changes the interval of a running GPT unit.
- * @pre     The GPT unit must have been activated using @p gptStart().
+ * @pre     The GPT unit must be running in continuous mode.
- * @pre     The GPT unit must have been running in continuous mode using
- *          @p gptStartContinuous().
  * @post    The GPT unit interval is changed to the new value.
  * @note    The function has effect at the next cycle start.
  *
  * @param[in] gptp      pointer to a @p GPTDriver object
  * @param[in] interval  new cycle time in timer ticks
+ *
  * @notapi
  */
 #define gpt_lld_change_interval(gptp, interval)                               \
   ((gptp)->tim->ARR = (uint32_t)((interval) - 1))
 
+/**
+ * @brief   Returns the interval of GPT peripheral.
+ * @pre     The GPT unit must be running in continuous mode.
+ *
+ * @param[in] gptp      pointer to a @p GPTDriver object
+ * @return              The current interval.
+ *
+ * @notapi
+ */
+#define gpt_lld_get_interval(gptp) ((gptcnt_t)(gptp)->tim->ARR + 1)
+
+/**
+ * @brief   Returns the counter value of GPT peripheral.
+ * @pre     The GPT unit must be running in continuous mode.
+ * @note    The nature of the counter is not defined, it may count upward
+ *          or downward, it could be continuously running or not.
+ *
+ * @param[in] gptp      pointer to a @p GPTDriver object
+ * @return              The current counter value.
+ *
+ * @notapi
+ */
+#define gpt_lld_get_counter(gptp) ((gptcnt_t)(gptp)->tim->CNT)
+
 /*===========================================================================*/
 /* External declarations.                                                    */
 /*===========================================================================*/

os/hal/src/gpt.c

@@ -118,9 +118,7 @@ void gptStop(GPTDriver *gptp) {
 /**
  * @brief   Changes the interval of GPT peripheral.
  * @details This function changes the interval of a running GPT unit.
- * @pre     The GPT unit must have been activated using @p gptStart().
+ * @pre     The GPT unit must be running in continuous mode.
- * @pre     The GPT unit must have been running in continuous mode using
- *          @p gptStartContinuous().
  * @post    The GPT unit interval is changed to the new value.
  *
  * @param[in] gptp      pointer to a @p GPTDriver object