Signed-off-by: Emil Kronborg emil.kronborg@protonmail.com --- doc/usage/cmd/pwm.rst | 80 +++++++++++++++++++++++++++++++++++++++++++ doc/usage/index.rst | 1 + 2 files changed, 81 insertions(+) create mode 100644 doc/usage/cmd/pwm.rst
diff --git a/doc/usage/cmd/pwm.rst b/doc/usage/cmd/pwm.rst new file mode 100644 index 000000000000..208bad487aaa --- /dev/null +++ b/doc/usage/cmd/pwm.rst @@ -0,0 +1,80 @@ +.. SPDX-License-Identifier: GPL-2.0+: + +.. index:: + single: pwm (command) + +pwm command +=========== + +Synopsis +-------- + +:: + + pwm invert <pwm_dev_num> <channel> <polarity> - invert polarity + pwm config <pwm_dev_num> <channel> <period_ns> <duty_ns> - config PWM + pwm enable <pwm_dev_num> <channel> - enable PWM output + pwm disable <pwm_dev_num> <channel> - disable PWM output + + +Description +----------- + +The ``pwm`` command is used to access and configure PWM (Pulse Width Modulation) +signals. For all subcommands, the following arguments are common: + +pwm_dev_num + device number + +channel + channel on chosen device + +pwm invert +---------- + +The signal's active and inactive states are swapped. + +pwm config +---------- + +Configure the period and duty cycle in nanoseconds. + +pwm enable +---------- + +Enable output on the configured device and channel. + +pwm disable +----------- + +Disable output on the configured device and channel. + +Examples +-------- + +Configure device 0 channel 0 to 50 kHz period and 70% duty cycle:: + + => pwm config 0 0 20000 14000 + +Enable output on the configured device and channel:: + + => pwm enable 0 0 20000 14000 + +Disable output on the configured device and channel:: + + => pwm enable 0 0 20000 14000 + +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. + +Return value +------------ + +If the command succeeds, the return value ``$?`` is set to 0. If an error occurs, the +return value ``$?`` is set to 1. diff --git a/doc/usage/index.rst b/doc/usage/index.rst index 49b354e6ffd2..1adab5283950 100644 --- a/doc/usage/index.rst +++ b/doc/usage/index.rst @@ -92,6 +92,7 @@ Shell commands cmd/pinmux cmd/printenv cmd/pstore + cmd/pwm cmd/qfw cmd/read cmd/reset
base-commit: c0d269da3c8492d4b81bbcb79a66f6d4a49f7610