Hello,
I’m a beginner learning about PRU with a couple of questions. I’ve been using as reference: - PRU Cookbook (thank you Mark) - Exploring BeagleBone by Derek Molloy - TI Examples & Labs https://processors.wiki.ti.com/index.php/PRU_Training:_Hands-on_Labs *Questions:* 1. 1. Default firmware for PRU0/1: root@beaglebone:~# cat /sys/class/remoteproc/remoteproc*/firmware am335x-pm-firmware.elf am335x-pru0-fw am335x-pru1-fw root@beaglebone:~# find / -name am335x-pru?-fw /lib/firmware/am335x-pru0-fw /lib/firmware/am335x-pru1-fw What do these programs do? I haven’t found any source code to explain what is inside. I think the files come from TI (compiled form), but what happens if I echo start > state for the default firmware? Seems strange to have this as the default with no clues about what is inside. 2. What is the source for the __R30 pin configurations (default?. Fresh boot => root@beaglebone:~# cat /sys/kernel/debug/remoteproc/remoteproc1/regs | grep "GPREG30 " GPREG30 := 0xd233c9c3 CT_REG30 := 0x40000000 I’ve looked in: U-Boot, am335x-boneblack-uboot, cape_universal, AM335X-PRU-RPROC-4-14-TI-00A0 and googled around but can’t find anything that looks like it sets __R30 at boot. With a LED connected to P9-27, P9-28, P9-29: config-pin P9-27 pruout => LED is low config-pin P9-28 pruout => LED is high config-pin P9-28 pruout => LED is high For me, it seems strange that some pins would be high by "default". What is setting these values as high??? Many thanks in advance for any clues. -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/3f51b584-e0bc-4474-9710-5a96f53d5177%40googlegroups.com.
