5.3.3. PRU-ADC Demo

5.3.3.1. Introduction

This demo shows flexible interface for Simultaneous, Coherent DAQ Using Multiple ADCs via PRU-ICSS. More details can be found at https://www.ti.com/tool/TIDA-01555

5.3.3.2. Hardware Needed

Please refer to the TI Design to set up the hardware needed to run this demo.

• Beaglebone Black
• TIDA-01555 adapter card
• TIDA-01555 ADC board
• Desktop power supply to provide 5.5 volts to the ADC board
• Desktop signal generator to produce a 45-55Hz sine wave as an input

5.3.3.3. Steps to Run the Demo

Below are the steps to run the demo with Processor SDK Linux RT build for AM335x.

First, use /boot/am335x-boneblack-pru-adc.dtb as the default dtb:

cd /boot
cp am335x-boneblack.dtb am335x-boneblack.dtb.orig
cp am335x-boneblack-pru-adc.dtb am335x-boneblack.dtb

Then, link am335x-pru*_fw to the PRU-ADC firmware binaries:

cd /lib/firmware
ln -sf /lib/firmware/pru/PRU_ADS8688_Controller.out am335x-pru0-fw
ln -sf /lib/firmware/pru/PRU_ADS8688_Interface.out am335x-pru1-fw

After that, reboot the EVM, and then execute the ARM binary:

run-pru-adc.sh