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Description
hw_output_pwm_id = hw_output_pwm_add(name, frequency_hz, initial_duty_cycle) (from AM/AP 3.5)
hw_output_pwm_id = hw_output_pwm_add(hw_id, frequency_hz, initial_duty_cycle)
hw_output_pwm_add is used to add a hardware PWM output to your instrument.
Return value
| Argument |
Type |
Description
|
| hw_output_pwm_id |
ID |
This value can be used for further reference.
|
Arguments
| # |
Argument |
Type |
Description
|
| 1 |
hw_id |
String |
The is the reference to the input. You can choose to bind to an existing Hardware ID (Hardware_id_list).
|
| 2 |
frequency_hz |
Number |
The frequency of the PWM output signal, in Hz.
|
| 3 |
initial_duty_cycle |
Number |
The initial PWM duty cycle. Range 0.0 - 1.0, 0.0 being off, and 1.0 on.
|
Example
-- Bind to Raspberry Pi 2, Header P1, Pin 40
-- PWM frequency is set to 1 kHz, with a duty cycle of 50%.
output_id = hw_output_pwm_add("RPI_V2_P1_40", 1000, 0.5)
-- We can change the duty cycle runtime, in this case 20%
hw_output_pwm_duty_cycle(output_id, 0.2)