pwm command

Synopsis

pwm invert <pwm_dev_num> <channel> <polarity>
pwm config <pwm_dev_num> <channel> <period_ns> <duty_ns>
pwm enable <pwm_dev_num> <channel>
pwm disable <pwm_dev_num> <channel>

Description

The pwm command is used to access and configure PWM (Pulse Width Modulation) signals.

pwm invert

If the value of polarity is 0, the default polarity is used.
If the value of polarity is 1, the polarity is inverted.

pwm config

Configure the period and duty period in nanoseconds.

pwm enable

Enable output on the configured device and channel.

pwm disable

Disable output on the configured device and channel.

pwm_dev_num

Device number of the pulse width modulation device

channel

Output channel of the PWM device

polarity

0 - Use normal polarity
1 - Use inverted polarity

duty_ns

Duty period in ns

period_ns

Period time in ns

Examples

Configure device 0, channel 0 to 20 µs period and 14 µs (that is, 70%) duty period:

=> pwm config 0 0 20000 14000

Enable output on the configured device and channel:

=> pwm enable 0 0

Disable output on the configured device and channel:

=> pwm disable 0 0

Invert the signal on the configured device and channel:

=> pwm invert 0 0 1

Configuration

The pwm command is only available if CONFIG_CMD_PWM=y.