Raspberry Pi3

Links

AAA

On-board hardware

AAA

Serial console

there is no useful serial console

Benchmarks

[root@armdaq05 ~]# uname -a
Linux armdaq05.triumf.ca 4.4.21-v7+ #911 SMP Thu Sep 15 14:22:38 BST 2016 armv7l armv7l armv7l GNU/Linux
[root@armdaq05 ~]# cat /proc/cpuinfo 
processor	: 0
model name	: ARMv7 Processor rev 4 (v7l)
BogoMIPS	: 38.40
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xd03
CPU revision	: 4

processor	: 1
model name	: ARMv7 Processor rev 4 (v7l)
BogoMIPS	: 38.40
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xd03
CPU revision	: 4

processor	: 2
model name	: ARMv7 Processor rev 4 (v7l)
BogoMIPS	: 38.40
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xd03
CPU revision	: 4

processor	: 3
model name	: ARMv7 Processor rev 4 (v7l)
BogoMIPS	: 38.40
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xd03
CPU revision	: 4

Hardware	: BCM2709
Revision	: a22082
Serial		: 00000000852ec765
[root@armdaq05 ~]#

[root@armdaq05 ~]# ./memcpy_arm 
memcpy       1 KiBytes:    710 MB/sec
memcpy       2 KiBytes:   1037 MB/sec
memcpy       4 KiBytes:   1340 MB/sec
memcpy       8 KiBytes:   1572 MB/sec
memcpy      16 KiBytes:   1703 MB/sec
memcpy      32 KiBytes:   2010 MB/sec
memcpy      64 KiBytes:   1780 MB/sec
memcpy     128 KiBytes:   1808 MB/sec
memcpy     256 KiBytes:   1421 MB/sec
memcpy     512 KiBytes:    971 MB/sec
memcpy    1024 KiBytes:    862 MB/sec
memcpy    2048 KiBytes:    824 MB/sec
memcpy    4096 KiBytes:    862 MB/sec
memcpy    8192 KiBytes:    817 MB/sec
memcpy   16384 KiBytes:    797 MB/sec
memcpy   32768 KiBytes:    767 MB/sec
memcpy   65536 KiBytes:    765 MB/sec
memcpy  131072 KiBytes:    766 MB/sec
[root@armdaq05 ~]#

Original boot files with the CentOS 7.1 userland

NOTE: CentOS-7 userland is now obsolete. use Raspbian userland instead!

[root@armdaq05 ~]# blkid
/dev/mmcblk0p1: SEC_TYPE="msdos" LABEL="boot" UUID="70F7-FA1D" TYPE="vfat" 
/dev/mmcblk0p2: LABEL="el7" UUID="0ca625c5-8db1-4f78-a9fd-e6cce04f399e" TYPE="ext4" 
/dev/mmcblk0: PTTYPE="dos" 
[root@armdaq05 ~]# 
[root@armdaq05 ~]# fdisk -l

Disk /dev/mmcblk0: 31.4 GB, 31439454208 bytes, 61405184 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x5a7089a1

        Device Boot      Start         End      Blocks   Id  System
/dev/mmcblk0p1            8192      137215       64512    c  W95 FAT32 (LBA)
/dev/mmcblk0p2          137216     2713599     1288192   83  Linux
[root@armdaq05 ~]# 
[root@armdaq05 ~]# df -kl
Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/root        1235136 1029272    125072  90% /
devtmpfs          469536       0    469536   0% /dev
tmpfs             473868       0    473868   0% /dev/shm
tmpfs             473868   29964    443904   7% /run
tmpfs             473868       0    473868   0% /sys/fs/cgroup
tmpfs              94776       0     94776   0% /run/user/0
/dev/mmcblk0p1     64456   21192     43264  33% /mnt/tmp
[root@armdaq05 ~]#

Install Boot files

Original boot files are in /daq/daqshare/olchansk/RPI3/bootfs

use 32GB micro-SD flash
connect to USB-to-SD flash adapter, plug into linux computer
login as root
identify the /dev/sdXXX device corresponding to target media: use "fdisk -l", look for a 32GB disk with a single MS-DOS partition
ensure the partitions of /dev/sdXXX are not mounted, use "df -kl" and umount /dev/sdXXX1, etc.
run "fdisk /dev/sdXXX"
create MSDOS partition table: command "o"
create first partition 64Mbytes: command "n", primary "p", first sector "<enter>", last sector: "+64M"
set partition type "C": command "t", partition 1 is selected automatically, hex code "c"
mark bootable: command "a", partition 1 is selected automatically
confirm correct layout: command "p"

Disk /dev/sde: 31.1 GB, 31104958464 bytes, 60751872 sectors
   Device Boot      Start         End      Blocks   Id  System
/dev/sde1   *        2048      133119       65536    c  W95 FAT32 (LBA)

save new partition table: command "w", there should be no messages other than "syncing disks"
mkfs.msdos /dev/sdXXX1
mkdir -p /mnt/tmp
mount /dev/sdXXX1 /mnt/tmp, cd /mnt/tmp
rsync -av /daq/daqshare/olchansk/RPI3/bootfs/ .
sync
select boot method:
- cp cmdline-mmcblk.txt cmdline.txt ### to boot from SD flash
- cp cmdline-nfsroot.txt cmdline.txt ### to boot from network (dhcp and nfsroot)
sync
cd /; umount /mnt/tmp
eject /dev/sdXXX
try to boot from the SD flash - on HDMI video, should see Linux kernel boot all the way to a panic on failure to mount rootfs.

Install CentOS7 rootfs image

NOTE: CentOS-7 userland is now obsolete. Use Rapsbian userland instead!!!

use bootable 32GB micro-SD flash
connect and identify /dev/sdXXX same as above
ensure all partitions are unmounted, same as above
create second partion of maximum size:
fdisk /dev/sdXXX
command "n", "p", enter, enter
command "p" to see the layout:

Disk /dev/sde: 31.1 GB, 31104958464 bytes, 60751872 sectors
   Device Boot      Start         End      Blocks   Id  System
/dev/sde1   *        2048      133119       65536    c  W95 FAT32 (LBA)
/dev/sde2          133120    60751871    30309376   83  Linux

command "w" to save the changes
if it complains about "Device or resource busy":
- eject /dev/sdXXX
- remove it from usb adapter
- connect to usb adapter and identify device again, same as above
ls -l /dev/sdXXX* to see there are two partitions "1" and "2"
mkfs.ext4 /dev/sdXXX2
mkdir -p /mnt/tmp
mount /dev/sdXXX2 /mnt/tmp, cd /mnt/tmp
rsync -av /ladd/data0/backup.os/armdaq06/ .
e2label /dev/sdXXX2 el7
sync
cd /; umount /mnt/tmp
eject /dev/sdXXX
try to boot, should boot all the way to the login prompt.

Setup Python i2c tools

su - root
yum install python-setuptools.noarch
yum install python-cffi
yum install python-devel
cd git
git clone https://github.com/bivab/smbus-cffi.git
cd smbus-cffi
python setup.py install

Enable i2c drivers

(already done) edit boot config.txt, uncomment "dtparam=i2c_arm=on" and "dtparam=i2c1=on", reboot
echo modprobe i2c-dev >> /etc/rc.local
echo modprobe i2c_bcm2708 >> /etc/rc.local
ls -l /dev/i2c*
i2cdetect -l
i2cdetect 1
echo chmod a+wr /dev/i2c* >> /etc/rc.local
reboot, run i2cdetect again.

Script for creating boot files

~olchansk/git/scripts/clone/boot_rpi3.perl

Boot modes

See https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md and https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/bootflow_2711.md

RPi2, RPi3B - SD flash is the default. USB mass storage boot is disabled, but can be enabled.
RPi3B+ - default boot order: SD flash, USB boot
RPi4B - boots from internal SPI EEPROM (see recovery.bin). continues booting from SD flash. network boot (DHCP+TFTP), firmware 2020-xx-yy. (how to enable?). usb mass storage boot (not available as of 2020-apr-21).

Raspbian OS

Recommended RaspberryPi OS is "Raspbian". Current version is:

Raspbian Buster Lite
Version:February 2020
Release date:2020-02-13
Kernel version:4.19
Size:434 MB

Identification and important packages:

root@raspberrypi:~# uname -a
Linux raspberrypi 4.19.97-v7+ #1294 SMP Thu Jan 30 13:15:58 GMT 2020 armv7l GNU/Linux
root@raspberrypi:~# gcc -v
gcc version 8.3.0 (Raspbian 8.3.0-6+rpi1) 
root@raspberrypi:~# python --version
Python 2.7.16
root@raspberrypi:~# python3 --version
Python 3.7.3
root@raspberrypi:~# cmake --version
cmake version 3.13.4

download here https://www.raspberrypi.org/downloads/raspbian/
unzip, dd to a 32GB SDflash card
insert card into RPi3, power up, it will boot into login prompt
default user: pi, password: raspbian, login change default password, install ssh keys for user pi and user root.
change default keyboard layout from UK (with the pound key): vi /etc/default/keyboard, set XKBLAYOUT="us"
change default locale from UK to "C" (en_US.UTF8 does not seem to be available): vi /etc/default/locale, set LANG=C.UTF-8
enable ssh server: apt-get install openssh-server, systemctl enable sshd.service, systemctl start sshd.service
reboot: shutdown -r now
RJ45 ethernet network will autoconfigure by DHCP, ssh pi@... and root@... should work
login as root, install missing packages:
- apt-get update
- apt-get install git emacs xemacs21 cmake

Backport python3-yaml to Debian Buster

Debian Bullseye ships pyYAML 5.3.1, it is relatively easy to build the package for Debian Buster.

1. Downlowd

http://deb.debian.org/debian/pool/main/p/pyyaml/pyyaml_5.3.1.orig.tar.gz

and

http://deb.debian.org/debian/pool/main/p/pyyaml/pyyaml_5.3.1-1.debian.tar.xz

from https://packages.debian.org/bullseye/python3-yaml (under "Download Source Package"). Note the bullseye in the URL.

2. Unpack pyyaml_5.3.1.orig.tar.gz and, inside the PyYAML-5.3.1 directory, pyyaml_5.3.1-1.debian.tar.xz.

3. Install some dependencies needed for the build:

sudo apt install python3-all-dev python3-all-dbg libyaml-dev cython cython-dbg python-all-dev python-all-dbg

sudo apt install dpkg-dev

4. Build the package (on the target architecture)

sudo dpkg-buildpackage -us -uc -nc

Openbox X Session

Have a look in /etc/xdg/openbox

Custom Raspbian Images

The official tool used raspberrypi.org is available here: https://github.com/RPi-Distro/pi-gen

It is working out of the box with Debian bullseye. The tool is built around debootstrap, all packages are pulled from http://archive.raspbian.org/ (not the official debian repos!).

The user has to provide a config file named "config" in the root directory. For instance:

IMG_NAME=MVM_GUI_TRIUMF 
RELEASE=buster
DEPLOY_ZIP=0
USE_QEMU=0
LOCALE_DEFAULT=C.UTF-8
TARGET_HOSTNAME=mvm_gui
KEYBOARD_KEYMAP=us
KEYBOARD_LAYOUT="English (US)"
TIMEZONE_DEFAULT="America/Vancouver"
FIRST_USER_NAME="mvm" 
FIRST_USER_PASS="gui"
ENABLE_SSH=0
STAGE_LIST="stage0 stage1 stage2 stage3 stage4"

To build the image, simply run ./build.sh and wait.

MVM example

Let's build an image tailored to the MVM GUI. The assumes the user is running Debian bullseye.

Optional Step: Setup a Local APT Cache

A local cache speeds-up things if you have to (re)build multiple images. The procedure supposes that you have docker and docker-compose installed on the build machine.

In the root directory, run

apt install docker-compose ### Ubuntu LTS 18.04
docker-compose up -d

Add the line

APT_PROXY=http://172.17.0.1:3142

to the config file

Main Procedure

Install dependencies (Debian):

sudo apt install coreutils quilt parted qemu-user-static debootstrap zerofree zip \
dosfstools bsdtar libcap2-bin grep rsync xz-utils file git curl bc

Install dependancies (Ubuntu LTS 18.04)

ssh root@...
apt-get install quilt qemu-user-static debootstrap zerofree bsdtar curl

Clone the TRIUMF repo:

https://gitlab.triumf.ca/mvmdev/GUIAutoBuild --single-branch slim-raspbian-buster

Run:

LANG=C.UTF-8 ./build.sh

Wait ... the images will be saved in the deploy directory.

GPIO

apt-get install wiringpi
gpio readall
gpio mode 24 output
gpio write 24 1
gpio write 24 0

SPI

if there is no /dev/spidev0.0 and /dev/spidev0.1, edit /boot/config.txt, uncomment dtparam=spi=on, reboot
CS pins are:
- CE0 is J8 pin 24 (GPIO8) is /dev/spidev0,0
- CE1 is J8 pin 26 (GPIO7) is /dev/spidev0,1

I2C

if there is no /dev/i2c*, edit /boot/config.txt, uncomment "dtparam=i2c_arm=on", reboot
apt-get install python-smbus i2c-tools
i2cdetect -y 1 ### found device at address 0x70:

     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: 70 -- -- -- -- -- -- --

WiFi and Bluetooth

The WiFi and Bluetooth interfaces can be disabled in the boot/config.txt. As a side effect, the PL011 UART is re-routed to the GPIOs 14 and 15. By default, the UART is used by the BT modem.

One has to disable the BT modem initialization service to avoid conflicts.

systemctl disable hciuart

Note: there is a second "MiniUART" aviabale on the Rpi, but its fonctionally are very limited. See https://www.raspberrypi.org/documentation/configuration/uart.md

# Disables the Bluetooth device (also restores UART0/ttyAMA0 to GPIOs 14 and 15).
dtoverlay=disable-bt
dtoverlay=disable-wifi

RS232

The Rpi3 has two serial interfaces (https://www.raspberrypi.org/documentation/configuration/uart.md). Levels are *3.3V*.

Rpi3 RS233 3.3V wiring with a standard TTL-232R to USB serial cable (FTDI chip)

RPI3

Contents

Raspberry Pi3

Links

On-board hardware

Serial console

Benchmarks

Original boot files with the CentOS 7.1 userland

Install Boot files

Install CentOS7 rootfs image

Setup Python i2c tools

Enable i2c drivers

Script for creating boot files

Boot modes

Raspbian OS

Backport python3-yaml to Debian Buster

Openbox X Session

Custom Raspbian Images

MVM example

Optional Step: Setup a Local APT Cache

Main Procedure

GPIO

SPI

I2C

WiFi and Bluetooth

RS232

End

Navigation menu

RPI3

Raspberry Pi3

Links

On-board hardware

Serial console

Benchmarks

Original boot files with the CentOS 7.1 userland

Install Boot files

Install CentOS7 rootfs image

Setup Python i2c tools

Enable i2c drivers

Script for creating boot files

Boot modes

Raspbian OS

Backport python3-yaml to Debian Buster

Openbox X Session

Custom Raspbian Images

MVM example

Optional Step: Setup a Local APT Cache

Main Procedure

GPIO

SPI

I2C

WiFi and Bluetooth

RS232

End

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