RPi Pico play with slackwareARM

enine · 03-12-2021, 08:20 PM

I started with their pico_setup.sh file from page 4 on the datasheet https://datasheets.raspberrypi.org/p...-with-pico.pdf

I figured if I follow it and setup everything like it does I should be good.

Code:

GIT_DEPS="git"
git-2.9.0-x86_64-1.txz

SDK_DEPS="cmake gcc-arm-none-eabi gcc g++"
cmake-3.5.2-x86_64-1.txz
https://slackbuilds.org/repository/1...pment/arm-gcc/ https://slackbuilds.org/repository/1.../arm-binutils/
gcc-5.3.0-x86_64-3.txz
gcc-g++-5.3.0-x86_64-3.txz

OPENOCD_DEPS="gdb-multiarch automake autoconf build-essential texinfo libtool libftdi-dev libusb-1.0-0-dev"
https://slackbuilds.org/repository/1...pment/arm-gdb/
automake-1.15-noarch-1.txz
autoconf-2.69-noarch-1.txz
build-essential
texinfo-6.1-x86_64-1.txz
libtool-2.4.6-x86_64-4.txz
libftdi-dev 
libusb-1.0.20-x86_64-1.txz
# Wget to download the deb

VSCODE_DEPS="wget"

UART_DEPS="minicom"
minicom-2.6.2-x86_64-1.txz

but yeah, good point on 14.2, I better try on a -current install. I have a Pi 400 that I haven't switched to Slackware yet so its running their OS so I can compare side by side if needed.

louigi600 · 05-03-2021, 02:47 AM

I condensed all the info one needs to get started on a generic linux system in a gist.
I plan to make it into an article or a blog here on LQ because its not slackware specific and may be helpful to a wider audience (I hope).
On my x86_64 box it works fine ... I don't have a aarch64 installation to check if the developer.arm gcc-arm-none-eabi-10-2020-q4-major-aarch64-linux.tar.bz2 cross toolchain will work too ... anyone care to check and/or have any suggestions before I make it into blog/article ?

enine · 05-03-2021, 10:34 AM

I don't have AArch64 yet, just 32bit armn so far.

Your gist seems to redirect to something else:

Code:

uBlock Origin has prevented the following page from loading:

http://mybetterdl.com/aS/feedclick?

Because of the following filter:

||mybetterdl.com

Found in: Peter Lowe’s Ad and tracking server list 
• EasyList

louigi600 · 05-03-2021, 10:53 AM

Maybe I pasted something wrong ... I fixed it now ... and for me it opens up my gist ... how it works for you too.
I'm now working on driving a HD44780 compatible LCD display trough PIO ... I might include that on the gist once I get it to work right.

enine · 05-03-2021, 11:27 AM

ok, thats better.

I'm confused though on the flavors or arm. If I'm running on an arm system and the pico is arm then why do I need a cross compiler, makes sense if I'm on x86/x86_64 but I thought the different versions of arm are mostly just compiler flags.

louigi600 · 05-03-2021, 12:44 PM

Because of the mismatching arm versions: current native arm compiler targets armv7 while if I remember right 14.2 targets armv5.
It is possible that 14.2 could produce code that might actually be executable by the cortex M0+ core of the rp2040 ... but the thing is that over there you aint got any libs, just the bare metal so you still need a bare metal toolchain.

enine · 05-03-2021, 02:07 PM

The v5 or v7 are specific to age of hardware.
I found it now, its the cortex A,R or M

Cortex A Application processors
Cortex R Real time processors
Cortex M Microcontrollers

so you could have a armv7-A running Linux or an armv7-M that can't, just annoying how they names it all the same

enine · 05-05-2021, 01:58 PM

I had to laugh at the configure error in the arm cross compiler tools

Code:

Compiler error reporting is too harsh for ./configure (perhaps remove -Werror).
** ./configure aborting.

poor wittle configure, we were just too harsh for him

louigi600 · 05-05-2021, 02:54 PM

I saw worse ... I've forgotten what tool was producing the message but the parent process was reporting something about raping one of the child processes.
I suspect the author could be deeply disturbed person.

louigi600 · 05-08-2021, 03:23 AM

I have not got around to writing the pio based 1602A LCD code but I have added in the gist an example that is somewhat more interesting then the pio flashing led from the pico-examples ... don't get too excited it is still a flashing led (but with dynamic on and off time) and I tried to explain every little detail to make it possible to learn from it. A good reading of chapter 3 of the rp2040 datasheet is probably still required if you are new to Programable IO.