DS90UB947-Q1EVM: Possible to script PWM GPIO from ALP?

Would something like this work?

import time

frequency = 500 # Hertz
duty_cycle = 0.3 # 0 to 1
gpio_pin = 3 # 0,1,2,3

cycle_time = 1 / frequency
on_interval = cycle_time * duty_cycle
off_interval = cycle_time * (1 - duty_cycle)

board.WriteReg(0x0F,3) # configure GPIO3 as forward channel output

while(1):
	board.WriteGPIOPin(gpio_pin, 1)
	time.sleep(on_interval)
	board.WriteGPIOPin(gpio_pin, 0)
	time.sleep(off_interval)

Alternatively, could I somehow use one of the PWM pins on the built in USB2ANY and just connect that to the GPIO3 pin of the DS90UB947?

(I think that would work, but I am not sure how to configure the USB2Any pins to output PWM)

Hi Adam, 

I will look into this and get back to you 10/19. 

Best,

Shu

I read through it, though was unable to get the usb2any dll to respond as expected, at least from the ALP scripting interface. Here's what I tried:

Texas Instruments - Analog LaunchPAD
© 2007-2021 Texas Instruments Inc. All Rights Reserved
The variable "alpBoards" contains a list of ALP Board objects present on this machine.

>from ctypes import *
>usb2anydll = windll.LoadLibrary('C:\\Program Files (x86)\\Texas Instruments\\Analog LaunchPAD v1.57.0010\\Drivers\\i2c_controllers\\usb2any\\python\\USB2ANY.dll')
>
>usb2anydll.u2aOpen(0)
-12
>u2ahandle = usb2anydll.u2aOpen(0)
>
>usb2anydll.u2aPWM_Control(u2ahandle,2,0,3,5000,4,1000,0)
-24
>usb2anydll.u2aPWM_Control(u2ahandle,2,0,3,500000,4,100000,0)
-24

I had a logic analyzer hooked up to the usb2any's PWM pins and did not see any output at all.

Ok, thanks. Just to confirm though, is it not possible to generate PWM output on the DS90UB947-Q1EVM via the scripting interface?

Ok, will use an external generator.