STM32-DVM-MTR2K

Contents:

NanoPi-NEO-512M
Firmware Upgrade
pistar-shutdown.sh
armbian OS
Armbian Setup

Repeater Builder's MTR-2000 Page:
https://www.repeater-builder.com/motorola/mtr2k/mtr-index.html

Introducing the STM32-DVM-MTR2K:
http://ks-dmr.net/2019/04/11/introducing-the-stm32-dvm-mtr2k/

Programming an MTR2000 for the STM32-DVM-MTR2K:
http://ks-dmr.net/2019/04/30/programming-an-mtr2000-for-the-stm32-dvm-mtr2k/

Software and Firmwared downloads are available here:
http://wiki.w9cr.net/index.php/MTR_Repeater

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NanoPi-NEO-512M

https://wiki.friendlyelec.com/wiki/index.php/NanoPi_NEO

NanoPi-NEO (V1.31) 512M RAM - Quad Core Action with Armbian Support.
Works with PowerDock, UnoDock, and BakeBit Accessories for expansion:

https://andahammer.com/index.php?route=product/product&product_id=175

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Firmware Upgrade

rpi-rw
mv /etc/mmdvmhost /etc/mmdvmhost.save  # disable mmdvmhost
cd ~
wget -N http://dvswitch.org/files/HAM/MMDVM/stm32flash                                   # get flash utility
pi-star(rw): wget -N http://dvswitch.org/files/HAM/MMDVM/Version_3_Firmware/mmdvm_f4.hex # get Firmware
chmod +x stm32flash                                                                      #make flash utility executable
./stm32flash -v -w mmdvm_f4.hex -i 20,-21,21,-20 -R /dev/ttyAMA0          # Display firmware version
stm32flash 0.5                                                            # apply update
#   http://stm32flash.sourceforge.net/
#   Interface serial_posix: 57600 8E1
#   Version : 0x31
#   Option 1 : 0x00
#   Option 2 : 0x00
#   Device ID : 0x0421 (STM32F446xx)
#   - RAM : 128KiB (12288b reserved by bootloader)
#   - Flash : 512KiB (size first sector: 1x16384)
#   - Option RAM : 16b
#   - System RAM : 30KiB
#   Write to memory
#   Erasing memory
#   Wrote and verified address 0x0800fec8 (100.00%) Done.
mv /etc/mmdvmhost.save /etc/mmdvmhost *”re-enable” mmdvmhost
root@pi-star(rw): sync;sync;reboot

http://ks-dmr.net/2019/05/28/stm32-dvm-mtr2k-deep-dive-updating-firmware/

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pistar-shutdown.sh

#!/bin/bash
#
# gnl20220325 Pistar shutdown
#
if [ "$(id -u)" != "0" ]; then
  echo -e "You need to be root to run this command...\n"
  exit 1
fi

# Get the modem port from /etc/mmdvmhost
if [ -f /etc/mmdvmhost ]; then
	mmdvmModem=$(grep -m 1 'Port=' /etc/mmdvmhost | awk -F "=" '/Port/ {print $2}')
	echo "Modem port is:" $mmdvmModem
fi

# Output some feedback to the terminal
echo "Stopping Pi-Star Services..."

# Make the disk RW
mount -o remount,rw /

# Stop the services
systemctl stop pistar-watchdog.timer
systemctl stop pistar-watchdog.service
systemctl stop mmdvmhost.timer
systemctl stop mmdvmhost.service
sleep 3

# Force Kill any remaining MMDVMHost processes
echo "Killing any remaining MMDVMHost processes..."
killall MMDVMHost
killall MMDVMHost_NoOLED
killall MMDVMHost_Adafruit

# Output some feedback to the terminal
echo "Shutdown Complete"

# rename mmdvmhost so there is not chance of it staring

if [ -f /etc/mmdvmhost ]; then
	mv /etc/mmdvmhost /etc/mmdvmhost.save
fi
echo "NOTE: \"/etc/mmdvmhost\" has been renamed \"/etc/mmdvmhost.save\""
echo "Make sure you name it back if you want DMR to work again!"
echo "Finished"

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armbian OS

Amdbian Home Page:
https://docs.armbian.com/

Documentation:
https://raw.githubusercontent.com/armbian/documentation/master/document.pdf

Minimal Debian based Linux for single board computers:
https://github.com/armbian

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Armbian Setup

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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20220326 - pre published v0.9