PRUCookbook Comments

[Neil Hancock]

Mark A. Yoder <mark.a...@gmail.com>	Fri, Aug 17, 7:58 AM
to BeagleBoard

The PRU cookbook is nearing completion (more accurately, I'm running out of summer).

Here's a link https://markayoder.github.io/PRUCookbook/

I'm happy for any feedback you can give me.

--Mark

Great format, I really like it online.

To test it I choose a BeagleBone Black Wireless (as it turns out it was spare) and it already had a version 4.9 onit and upgraded it to 

Linux beaglebone 4.14.69-ti-r75 #1 SMP PREEMPT Thu Sep 13 23:34:50 UTC 2018 armv7l GNU/Linux

Initially I followed instruction using USB, but then changed to wireless. Following is suggestions/observations

https://markayoder.github.io/PRUCookbook/02start/start.html

1.3. Flashing a Micro SD Card

Solution

Once the SD is flashed, insert it in the Beagle and power it up.

<Add> To permanently copy the image to the Beagle, copy it to Beagle flash.

[Reference to flashing beaglebone but post 4.4]

sudo nano \boot\uEnv.txt  - remove from #cmdline

##enable BBB: eMMC Flasher:

cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

 

toexit: save

sudo powerdown

Then press power button.

The device upgrades, and then powers down.

Remove uSD before pressing power switch.

 

<end>

1.4 Cloud9 IDE

 

<Comment > for windows http://192.168.7.2:3000, for other computers see… <end>

 

1.5 Getting Example Code

<add > Setup for internet.

Ethernet - connected automatically

USB - <setup>

<wireless > needs to be connected to the wireless

<end>

 

<comment 4.14.69-ti-r75 using USB>

The following is repeated a number of times in different place:

git clone https://github.com/MarkAYoder/PRUCookbook.git

Cloning into 'PRUCookbook'...

fatal: unable to access 'https://github.com/MarkAYoder/PRUCookbook.git/': Could not resolve host: github.com

when setup for WiFi - it worked.

<end>

 

1.6. Blinking an LED

Running Code worked for me

 

https://markayoder.github.io/PRUCookbook/03details/details.html

1.2 Compiling and Running

<comment >

debian@beaglebone:/var/lib/cloud9/git/PRUCookbook/docs/06io/code$ source gpio_setup.sh

PRUN=0

TARGET=gpio1

Wireless Not Found

$ cat /proc/device-tree/model

TI AM335x BeagleBone Black Wireless

 

workaround - make all defaults of pins P9_11

<end>

1.8 & 1.9 not checked.

[rogeri...@gmail.com]

Dude, you're a genius. You help me a lot !!

Thank you very much!!!!!!!

[Mark A. Yoder]

I'm glad you like it.  Let me know if you have any questions for suggestions for improvement.

--Mark

[rogeri...@gmail.com]

Yes, I made some adjustments in the Makefile to simplify the addressing of PRUs, see if it is useful:

# Lookup PRU by address

ifeq ($(PRUN),0)

PRU_ADDR=4a334000

endif

ifeq ($(PRUN),1)

PRU_ADDR=4a338000

endif

PRU_DIR=/sys/class/remoteproc/remoteproc$(PRUN)

all: stop install start

stop:

    @echo "-    Stopping PRU $(PRUN)"

    @echo stop | sudo tee $(PRU_DIR)/state || echo Cannot stop $(PRUN)

start:

    @echo "-    Starting PRU $(PRUN)"

    @echo start | sudo tee $(PRU_DIR)/state

[Vivek Patel]

Yes I need help,

I am using BBW and since last two days it is not getting detected in desktop computer what will be the possible cause of the problem,

It is booting properly that I can confirm by seeing led blinking,

Please help me.

--
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[Rogério Lucas]

You could download a default image and write to an sd card so you can confirm if it is a software or hardware problem so you know if your board is damaged.

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[Vivek Patel]

I have write new image to BBW but there isn't any change.

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