AliOS Things API HAL SOC PWM Guide

API INDEX

• 1 hal_pwm_init
• 2 hal_pwm_start
• 3 hal_pwm_stop
• 4 hal_pwm_finalize

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1-hal_pwm_init

int32_t hal_pwm_init(pwm_dev_t *pwm)

• Description

  Initialises a PWM pin

• Parameters

  IN/OUT	NAME	DESC
  [in]	pwm	the PWM device

• Returns

  0 : on success, EIO : if an error occurred with any step

2-hal_pwm_start

int32_t hal_pwm_start(pwm_dev_t *pwm)

• Description

  Starts Pulse-Width Modulation signal output on a PWM pin

• Parameters

  IN/OUT	NAME	DESC
  [in]	pwm	the PWM device

• Returns

  0 : on success, EIO : if an error occurred with any step

3-hal_pwm_stop

int32_t hal_pwm_stop(pwm_dev_t *pwm)

• Description

  Stops output on a PWM pin

• Parameters

  IN/OUT	NAME	DESC
  [in]	pwm	the PWM device

• Returns

  0 : on success, EIO : if an error occurred with any step

4-hal_pwm_finalize

int32_t hal_pwm_finalize(pwm_dev_t *pwm)

• Description

  finalize output on a PWM pin

• Parameters

  IN/OUT	NAME	DESC
  [in]	pwm	the PWM device

• Returns

  0 : on success, EIO : if an error occurred with any step