Access Registers from C Code on Am335x PRU

bwilcutt

I'd like to set up and program the Am335x SPI from within the PRU using C code.

How do I gain access to MCPSPI_CHxCONF and MCSPI_CHxCTRL registers so that I can a) reset and b) program the divider? These registers don't seem to be extended from within any header file. Should I point them to the necessary address myself?

I am using Code Composer Studio 6.1.1.00022.

Thanks,

Bryan

over 10 years ago

0 melissaw over 10 years ago

TI__Genius 15990 points

Hi Bryan,

The PRU_access_const_table example in the PRU Software Support package should be a helpful reference. Within the package, it is located in the examples/am335x/PRU_access_const_table directory.

This example shows how to read and write to different memory spaces (including the AM335x SPI registers) using the PRU constant table.

Regards,

Melissa

0 bwilcutt over 10 years ago in reply to melissaw

Intellectual 310 points

Awesome, thank you Melissa this is exactly what I was looking for!

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Access Registers from C Code on Am335x PRU