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Welcome to Catch22.eu Beaglebone Blog.
Beaglebone PRU Programming in C
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Here is an explanation of coding the Beaglebone PRU in C, comparing assembly instructions with C code.
Enable the PRU UIO Driver
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Thuis guide shows how to enable the PRUI UIO driver with recent kernel images.
Beaglebone PRU Shared Memory in C
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This is the first example as far as I know to use PRU C code to read and write to shared memory on the Beaglebone.