Added new pwmIsChannelEnabledI() API to the PWM driver, implemented in the STM32 driver.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5554 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/hal/include/pwm.h

@@ -211,6 +211,18 @@ typedef void (*pwmcallback_t)(PWMDriver *pwmp);
  */
 #define pwmDisableChannelI(pwmp, channel)                                   \
   pwm_lld_disable_channel(pwmp, channel)
+
+/**
+ * @brief   Returns a PWM channel status.
+ * @pre     The PWM unit must have been activated using @p pwmStart().
+ *
+ * @param[in] pwmp      pointer to a @p PWMDriver object
+ * @param[in] channel   PWM channel identifier (0...PWM_CHANNELS-1)
+ *
+ * @iclass
+ */
+#define pwmIsChannelEnabledI(pwmp, channel)                                 \
+  pwm_lld_is_channel_enabled(pwmp, channel)
 /** @} */
 
 /*===========================================================================*/

os/hal/platforms/STM32/pwm_lld.h

@@ -406,6 +406,19 @@ struct PWMDriver {
 #define pwm_lld_change_period(pwmp, period)                                 \
   ((pwmp)->tim->ARR = (uint16_t)((period) - 1))
 
+/**
+ * @brief   Returns a PWM channel status.
+ * @pre     The PWM unit must have been activated using @p pwmStart().
+ *
+ * @param[in] pwmp      pointer to a @p PWMDriver object
+ * @param[in] channel   PWM channel identifier (0...PWM_CHANNELS-1)
+ *
+ * @notapi
+ */
+#define pwm_lld_is_channel_enabled(pwmp, channel)                           \
+  ((pwmp->tim->CCR[channel] == 0) &&                                        \
+   ((pwmp->tim->DIER & (2 << channel)) == 0))
+
 /*===========================================================================*/
 /* External declarations.                                                    */
 /*===========================================================================*/

readme.txt

@@ -138,6 +138,8 @@
   (backported to 2.4.3).
 - FIX: Fixed wrong SPI path in platform_f105_f107.mk (bug 3598151).
 - FIX: Fixed PHY powerdown issues not fixed (bug 3596911).
+- NEW: Added new pwmIsChannelEnabledI() API to the PWM driver, implemented
+  in the STM32 driver.
 - NEW: Added support for timers 6, 7, 9, 11, 12, 14 to the STM32 GPT driver.
 - NEW: Added support for timer 9 to the STM32 PWM driver.
 - NEW: Relicensed parts of the distribution tree under the Apache 2.0