diff options
Diffstat (limited to 'os/hal/platforms/STM32/pwm_lld.h')
| -rw-r--r-- | os/hal/platforms/STM32/pwm_lld.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/os/hal/platforms/STM32/pwm_lld.h b/os/hal/platforms/STM32/pwm_lld.h index 3d0d9d79c..2b3ce7183 100644 --- a/os/hal/platforms/STM32/pwm_lld.h +++ b/os/hal/platforms/STM32/pwm_lld.h @@ -296,10 +296,6 @@ struct PWMDriver { #endif
/* End of the mandatory fields.*/
/**
- * @brief Bit mask of the enabled channels.
- */
- uint32_t enabled_channels;
- /**
* @brief Pointer to the TIMx registers block.
*/
TIM_TypeDef *tim;
@@ -309,6 +305,25 @@ struct PWMDriver { /* Driver macros. */
/*===========================================================================*/
+/**
+ * @brief Changes the period the PWM peripheral.
+ * @details This function changes the period of a PWM unit that has already
+ * been activated using @p pwmStart().
+ * @pre The PWM unit must have been activated using @p pwmStart().
+ * @post The PWM unit period is changed to the new value.
+ * @note The function has effect at the next cycle start.
+ * @note If a period is specified that is shorter than the pulse width
+ * programmed in one of the channels then the behavior is not
+ * guaranteed.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] period new cycle time in ticks
+ *
+ * @notapi
+ */
+#define pwm_lld_change_period(pwmp, period) \
+ ((pwmp)->tim->ARR = (uint16_t)((period) - 1))
+
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
@@ -339,7 +354,6 @@ extern "C" { void pwm_lld_init(void);
void pwm_lld_start(PWMDriver *pwmp);
void pwm_lld_stop(PWMDriver *pwmp);
- void pwm_lld_change_period(PWMDriver *pwmp, pwmcnt_t period);
void pwm_lld_enable_channel(PWMDriver *pwmp,
pwmchannel_t channel,
pwmcnt_t width);
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