How to place a jumper on R1 for NHD-0420D3Z-NSW-BBW-V3
I have a BeagleBone Black running Debian Jessie. I have a modified LCD4 cape that runs great. My LCD cape uses EHRPWM1A. I would like to use the PWM output of EHRPWM1B. It is going to attach to a piezo buzzer
I know that I can use the PWM output when my LCD cape is not enabled. I have modified the BB-BONE-BACONE cape to create 2 PWM outputs. I know that it is possible to control both the backlight for the LCD as well as the PWM for the buzzer simultaneously.
With my LCD cape enabled, I can export the PWM channel for my buzzer, set my period and duty cycle, but I get no output. Anybody have any thoughts about why this is?
My guess is that I don't understand something about how the /sys/class/backlight interacts with the PWM, but I don't know for certain.
I know that I can use the PWM output when my LCD cape is not enabled. I have modified the BB-BONE-BACONE cape to create 2 PWM outputs. I know that it is possible to control both the backlight for the LCD as well as the PWM for the buzzer simultaneously.
With my LCD cape enabled, I can export the PWM channel for my buzzer, set my period and duty cycle, but I get no output. Anybody have any thoughts about why this is?
My guess is that I don't understand something about how the /sys/class/backlight interacts with the PWM, but I don't know for certain.
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Hi Richard,
This link from Ti's Processor Forum may guide you down the right path. https://e2e.ti.com/support/processors/f/791/t/468790
Best Regards,0
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