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gpiocmds: Add soft-pwm frequency modulation support

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Signed-off-by: Guy Shapira <gayuha@gmail.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Guy Shapira 2020-09-07 13:31:35 +03:00 • committed by Kevin O'Connor
parent a79c57ab29
commit 27cefb2b38
3 changed files with 35 additions and 27 deletions
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18
docs/MCU_Commands.md
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@ -133,15 +133,13 @@ This section lists some commonly used config commands.
see the description of the 'set_pwm_out' and 'config_digital_out'
commands for parameter description.
* `config_soft_pwm_out oid=%c pin=%u cycle_ticks=%u value=%c
* `config_soft_pwm_out oid=%c pin=%u value=%c
default_value=%c max_duration=%u` : This command creates an internal
micro-controller object for software implemented PWM. Unlike
hardware pwm pins, a software pwm object does not require any
special hardware support (other than the ability to configure the
pin as a digital output GPIO). Because the output switching is
implemented in the micro-controller software, it is recommended that
the cycle_ticks parameter correspond to a time of 10ms or greater.
See the description of the 'set_pwm_out' and 'config_digital_out'
pin as a digital output GPIO). See the description of
the 'set_pwm_out' and 'config_digital_out'
commands for parameter description.
* `config_analog_in oid=%c pin=%u` : This command is used to configure
@ -203,9 +201,13 @@ only of interest to developers looking to gain insight into Klipper.
a hardware PWM output pin. See the 'schedule_digital_out' and
'config_pwm_out' commands for more info.
* `schedule_soft_pwm_out oid=%c clock=%u on_ticks=%u` : Schedules a
change to a software PWM output pin. See the 'schedule_digital_out'
and 'config_soft_pwm_out' commands for more info.
* `schedule_soft_pwm_out oid=%c clock=%u on_ticks=%u off_ticks=%u` : Schedules a
change to a software PWM output pin. The parameters 'on_ticks' and 'off_ticks'
define for how many ticks the pin will be on and off, respectively.
Because the output switching is implemented in the micro-controller software,
it is recommended that the sum of on_ticks and off_ticks parameters
corresponds to a time of 10ms or greater. See the 'schedule_digital_out' and
'config_soft_pwm_out' commands for more info.
* `query_analog_in oid=%c clock=%u sample_ticks=%u sample_count=%c
rest_ticks=%u min_value=%hu max_value=%hu` : This command sets up a