76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
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#include <common/bk_include.h>
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#include "bk_gpio.h"
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#include "pwm_hal.h"
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#include "pwm_ll.h"
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bk_err_t pwm_hal_init(pwm_hal_t *hal)
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{
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hal->hw = (pwm_hw_t *)PWM_LL_REG_BASE(hal->id);
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pwm_ll_init(hal->hw);
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return BK_OK;
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}
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bk_err_t pwm_hal_init_pwm(pwm_hal_t *hal, pwm_chan_t chan, const pwm_hal_config_t *config)
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{
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/* Import notes:
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* On BK7251, we found that, if we power up the channel and disable the PWM
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* channel immediately, then the PWM interrupt will not happen.
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*
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* So don't disable the PWM channel in PWM channel init API.
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**/
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//pwm_ll_disable(hal->hw, chan);
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pwm_ll_disable_interrupt(hal->hw, chan);
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pwm_ll_clear_chan_interrupt_status(hal->hw, chan);
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pwm_ll_set_mode_pwm(hal->hw, chan);
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pwm_ll_set_t1(hal->hw, chan, config->t1);
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pwm_ll_set_t2(hal->hw, chan, config->t2);
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pwm_ll_set_t3(hal->hw, chan, config->t3);
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pwm_ll_set_t4(hal->hw, chan, config->t4);
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return BK_OK;
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}
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bk_err_t pwm_hal_start_common(pwm_hal_t *hal, pwm_chan_t chan)
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{
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pwm_ll_enable(hal->hw, chan);
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return BK_OK;
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}
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bk_err_t pwm_hal_stop_common(pwm_hal_t *hal, pwm_chan_t chan)
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{
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/* We should disable the PWM interrupt first before stopping
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* PWM. Otherwise the interrupt will always be triggered and the
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* interrupt status can't be cleared (Observed on BK7251).
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**/
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pwm_ll_disable_interrupt(hal->hw, chan);
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pwm_ll_clear_chan_interrupt_status(hal->hw, chan);
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pwm_ll_disable(hal->hw, chan);
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//The original implementation for BK7231N will reset the hardware configuration here!
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//Now we do it in deinit API.
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return BK_OK;
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}
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bk_err_t pwm_hal_init_capture(pwm_hal_t *hal, pwm_chan_t chan, const pwm_hal_capture_config_t *config)
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{
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//pwm_ll_disable(hal->hw, chan);
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pwm_ll_disable_interrupt(hal->hw, chan);
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if (config->edge == PWM_CAPTURE_POS)
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pwm_ll_set_mode_capture_pos(hal->hw, chan);
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else if (config->edge == PWM_CAPTURE_NEG)
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pwm_ll_set_mode_capture_neg(hal->hw, chan);
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else if (config->edge == PWM_CAPTURE_EDGE)
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pwm_ll_set_mode_capture_edge(hal->hw, chan);
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else {
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//Never be here, caller validate the parameter
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}
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pwm_ll_set_t1(hal->hw, chan, 0);
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pwm_ll_set_t2(hal->hw, chan, 0);
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pwm_ll_set_t3(hal->hw, chan, 0);
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pwm_ll_set_t4(hal->hw, chan, 0);
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return BK_OK;
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}
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