Difference between revisions of "Hw output pwm add"
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! Argument !! Type !! Description | ! Argument !! Type !! Description | ||
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| '''hw_output_pwm_id''' || '' | | '''hw_output_pwm_id''' || ''ID'' || This value can be used for further reference. | ||
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Revision as of 14:23, 12 July 2018
Description
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)