Hi everyone, I have been trying to use PRU to read multiple ADC inputs. Unfornately, I am stuck at accessing to the ADC registers (chapter 12 on AM335x technical reference manual). I set the OCP registers, checked the PMAO registers on PRU to ensure access to external host. For example, I read the ADC REVISION as below: (tried to write to STEPCONFIG and STEPENABLE, etc.)
MOV r13, 0x44E0D000 //ADC REVISION LBBO r5, r13, 0, 4 SBCO r5, C28, 4, 4 //store REVISION to shared memory to show with C program .. but everything returns 0. I install Ubuntu 13.04 on Beaglebone Black, tried kernels 3.8, 3.12. PRU worked with shared memory accessing, and GPIO1 registers (I am not sure what to try next) . I haven't tried it on the official Angstrom image, because I still couldn't get PRU to work right away on it. On this link: http://beaglebone.cameon.net/home/reading-the-analog-inputs-adc . There are some comments saying that it works. Please let me know if you need anymore details. Or if someone has it working, please let me know, if I can reproduce a working scenario, it would be very nice. Thank you. Sincerely, Nhan Nguyen -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
