Re: [beagleboard] Re: Is there a way to send an interrupt from userspace to the PRU-ICSS?

Here is another link that should explain it clear enough. http://processors.wiki.ti.com/index.php/HOWTO_Change_the_Linux_Kernel_Start_Address#Modifying_memory.h So I would say that it is not by accident that the base address of 0x800 works. In fact, if you think about it a little bit. . Read

Re: [beagleboard] Re: Is there a way to send an interrupt from userspace to the PRU-ICSS?

OK, according to some dicumentation I was able to find quickly, address 0x800 is the base address for the start of the DDR memory on the TI EVM board. Which is very similar to the beaglebone in memory layout. On Fri, Mar 10, 2017 at 7:38 PM, William Hermans wrote: >

Re: [beagleboard] Re: Is there a way to send an interrupt from userspace to the PRU-ICSS?

Thinking on it for a little longer, I almost want to say that the Address 0x800h is actually the start of Linux's virtual memory map. But I'm not 100% sure. I'm doing my own research for a paying project, so can't really dive into documentation for something else right now . . . On Fri, Mar

Re: [beagleboard] Re: Is there a way to send an interrupt from userspace to the PRU-ICSS?

On Fri, Mar 10, 2017 at 2:53 PM, ags wrote: > I've had a hard time getting any definitive responses to questions on the > subject of memory access & latency. It is true that the PRU cores have > faster access to DRAM that is part of the PRU-ICSS (through the 32-bit >

Re: [beagleboard] Re: on accessing the p8/9 headers

Bye Bye!! Gerald On Fri, Mar 10, 2017 at 4:04 PM, 'woody stanford' via BeagleBoard < beagleboard@googlegroups.com> wrote: > Sweet Fish > Q: What kind of fish goes well with peanut butter? > > A: Jellyfish! > > Categories: Animal Jokes(Fish Jokes), Food Jokes, Riddles(Riddles for Kids) >

[beagleboard] Re: on accessing the p8/9 headers

Sweet Fish Q: What kind of fish goes well with peanut butter? A: Jellyfish! Categories: Animal Jokes(Fish Jokes), Food Jokes, Riddles(Riddles for Kids) Copyright © 2013 - All Rights Reserved - Used with Permission. Share ViaE-MailTwitterFacebookGoogle PlusURL Share 264111 Anonymous Blow Your

[beagleboard] Re: on accessing the p8/9 headers

Sweet Fish *Q: *What kind of fish goes well with peanut butter? *A:* Jellyfish! Categories: Animal Jokes (Fish Jokes ), Food Jokes , Riddles

Re: [beagleboard] Re: Is there a way to send an interrupt from userspace to the PRU-ICSS?

I've had a hard time getting any definitive responses to questions on the subject of memory access & latency. It is true that the PRU cores have faster access to DRAM that is part of the PRU-ICSS (through the 32-bit interconnect SCR) - though not single-cycle - than to system DDR. However, the

[beagleboard] Re: on accessing the p8/9 headers

Since this is my thread, I though I would reach out to my fellows, both professional (ie. Beagleboard) and hobbyist (that that have ACTUALLY solved this issue and can add something to this discussion) if they can shed some light on the following issues. I'm serious though about people that

[beagleboard] Re: Are the am335x_pru_package examples incorrectly (dangerously) accessing DDR memory?

Hi, I believe the example is indeed buggy, and works by accident. You can check "cat /proc/iomem" and see that your mapped region overlaps the kernel code. If you need to properly allocate and map DDR between ARM and PRU, then I would suggest to: 1. Load PRU UIO with "modprobe uio_pruss

Re: [beagleboard] Re: Making a custom SD image of BBB's eMMC

For example here you will notice two different H tags for two of the same type of image: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Jessie_Snapshot_iot Jessie Snapshot iot Flasher: (iot) (All BeagleBone Variants) > > Get prebuilt image: > > wget >

Re: [beagleboard] Re: Making a custom SD image of BBB's eMMC

On Fri, Mar 10, 2017 at 10:24 AM, Justin Pearson wrote: > This sounds like what I'm looking for, thanks. > > Follow-up: Is there an easy way to modify this procedure so the new BBB > simply boots from the SD card instead of wiping out its eMMC with the image > on the SD

Re: [beagleboard] Re: Making a custom SD image of BBB's eMMC

On Fri, Mar 10, 2017 at 6:37 AM, Charlie Rysenga wrote: > >- Boot master BBB with no SD card in >- Insert SD card >- Log in (e.g. with serial terminal, SSH etc.) and run sudo >/opt/scripts/tools/eMMC/beaglebone-black-make-microSD-flasher-from-eMMC.sh >(you

[beagleboard] config-pin does not work for all pins on BBBW

On BBBW, when I do 'config-pin -q P9.28', I get the following error: "Cannot read pinmux file: /sys/devices/platform/ocp/ocp*P9_28_pinmux/state". When I do 'config-pin -q P9.22', it works fine. I have loaded cape-universala previously with the following command "config-pin overlay

[beagleboard] Re: Detecting (probing) MPU-9250 connected to beaglebone board black

If you have a current version of Debian 8, with the cape manager, THEN I2C-2 IS ALREADY ENABLED. IT IS ALREADY BROUGHT OUT ON P9_19 and P9_20 Start with that one, Don't mess with I2C-1. If you touch the EEPROM on I2C-1, you can brick the unit. It is intended for internal use. Get your part

Re: [beagleboard] TI Sitara 57XX - Combining Debian FS Image from BeagleBoard-X-15 with Kernel/Boot from TI SDK

FYI, Thanks again!! It was pretty straight forward to get mono and .net applications up and running (but haven't tried serial ports over USB yet) the other day on 572x EVM with the stock BeagleBoard-X15 image.. Now slogging through manipulating all the DT stuff for when the custom hardware

[beagleboard] Re: Detecting (probing) MPU-9250 connected to beaglebone board black

Hi Graham, I have been using the latest version of Debien, for three days now with the same result. On the other hand i checked with the oscilloscope the SDA and SCL lines are not acting like they are supposed to act (even on the default P9_19 and P9_20). Thought maybe they all need to be

[beagleboard] Re: Making a custom SD image of BBB's eMMC

There is a much easier way if you are running the Debian image from BB.org there is a script that is already on your bone. Steps are as follows: - Boot master BBB with no SD card in - Insert SD card - Log in (e.g. with serial terminal, SSH etc.) and run sudo

[beagleboard] Re: Detecting (probing) MPU-9250 connected to beaglebone board black

Under Debian 8, the external I2C bus is now I2C-2. I2C-1 is internal only, and used for talking to the PMIC and things like that. Don't use it, unless you really understand what you are doing. --- Graham == On Fri, Mar 10, 2017 at 8:08 AM, christ christ wrote: > Hi

[beagleboard] Re: Detecting (probing) MPU-9250 connected to beaglebone board black

Thanks Graham, I did the update already. Will try to see with the oscilloscope. Christ On Thu, Mar 9, 2017 at 4:25 PM, Graham wrote: > Then it is not wired or connected correctly. > Put an oscilloscope on the data and clock lines and see if they are doing > what they