Pulse Width Modulation (Pwm) - FLIR GRASSHOPPER 3 Series Technical Reference

6.5

Pulse Width Modulation (PWM)

When a GPIO pin is set to PWM (GPIO Mode 4), the pin will output a specified number of pulses with
programmable high and low duration.
The pulse is independent of integration or external trigger. Two pins can be the signal source (i.e., simultaneously
output different PWMs). The pulse can appear on any of the GPIO pins.
The units of time are generally standardized to be in ticks of a 1.024 MHz clock. A separate GPIO pin may be
designated as an "enable pin"; the PWM pulses continue only as long as the enable pin is held in a certain state
(high or low).
To control PWM:
GenICam—Digital Input Output Control
n
CSRs—GPIO_CTRL_PIN: 1110h-1140h
n
2/10/2017
©2013-2017
FLIR Integrated Imaging
Solutions Inc. All rights reserved.
Note: The pin configured to output a PWM signal (PWM pin)
remains in the same state at the time the 'enable pin' is disabled.
For example, if the PWM is in a high signal state when the
'enable pin' is disabled, the PWM pin remains in a high state. To
re-set the pin signal, you must re-configure the PWM pin from
GPIO Mode 4 to GPIO Mode 1.
and
Grasshopper
GPIO_XTRA_PIN: 1114h-1144h
®
3 PGE Technical Reference
6 Input/Output Control
36