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feat(mcpwm): Set group clock prescale dynamically

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MCPWM group clock pre scale was originally fixed to 2, which is
inconvenient. Set group clock prescale dynamically. Now the maximum
resolution of the MCPWM timer is up to 160MHz(when the prescale set
to 1). And add a resulotion config for MCPWM capture.
This commit is contained in:
Chen Jichang
2023-08-22 15:43:30 +08:00
parent 78af508654
commit fc80d3e568
17 changed files with 200 additions and 38 deletions
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11
components/hal/esp32c6/include/hal/mcpwm_ll.h
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@@ -45,10 +45,12 @@ extern "C" {
#define MCPWM_LL_EVENT_CAPTURE(cap) (1 << ((cap) + 27))
// Maximum values due to limited register bit width
#define MCPWM_LL_MAX_GROUP_PRESCALE 256
#define MCPWM_LL_MAX_TIMER_PRESCALE 256
#define MCPWM_LL_MAX_CARRIER_PRESCALE 16
#define MCPWM_LL_MAX_CARRIER_ONESHOT 16
#define MCPWM_LL_MAX_CAPTURE_PRESCALE 256
#define MCPWM_LL_MAX_CAPTURE_TIMER_PRESCALE 1
#define MCPWM_LL_MAX_DEAD_DELAY 65536
#define MCPWM_LL_MAX_COUNT_VALUE 65536
@@ -105,13 +107,14 @@ static inline void mcpwm_ll_group_enable_clock(mcpwm_dev_t *mcpwm, bool en)
* @brief Set the MCPWM group clock prescale
*
* @param mcpwm Peripheral instance address
* @param pre_scale Prescale value
* @param prescale Prescale value
*/
static inline void mcpwm_ll_group_set_clock_prescale(mcpwm_dev_t *mcpwm, int pre_scale)
static inline void mcpwm_ll_group_set_clock_prescale(mcpwm_dev_t *mcpwm, int prescale)
{
(void)mcpwm; // only one MCPWM instance
// group clock: PWM_clk = source_clock / (prescale + 1)
HAL_FORCE_MODIFY_U32_REG_FIELD(PCR.pwm_clk_conf, pwm_div_num, pre_scale - 1);
// group clock: PWM_clk = source_clock / (prescale)
HAL_ASSERT(prescale <= 256 && prescale > 0);
HAL_FORCE_MODIFY_U32_REG_FIELD(PCR.pwm_clk_conf, pwm_div_num, prescale - 1);
}
/**