ParaTNC version DF15, April 4th 2021 ----------------------------------------- // Please look into 'doc' directory for more documentation and user manuals // WARNING: This readme could be sligtly outdated due to my lack of time :) // Ongoing changes // --------------- // Currently intense refactoring is done, which will result in new main software version EA00. // EA00 will remove the support for any Hardware Revision before HW-RevC, so it won't work on STM32VLDISCOVERY // anymore. Conditional compilation will be removed, so EA00 and all consecutive version will be build as // one binary with support to everything. The configuration will be kept in Flash memory and could be // altered 'on the fly' by using some external (not yet started) software tool, without a need to recompile // and reflash the controller. 1. INTRODUCTION ParaTNC is a hardware and a software which offers the functionality of multi function APRS controler. The software itself can also run on cheap STM32VLDISCOVERY board with slightly reduced functionality, but with costs about 10..12 euro this gives the cheapest possible standalone APRS controller. ParaAPRS supports key elements of what good APRS device should have: -> Two directional KISS TNC (no init strings required). -> WIDE1-1 digipeater, with an option to limit digipeating only to SSIDs 7, 8 and 9. -> Weather station with support for various meteo sensors. Full list od supported devices in point 5. -> Extensive telemetry with an information about the count of receved, transmitted and digipeated frames plus status of weather sensors. -> Support for VE.Direct serial protocol used in Victron PV charging controllers. The data about currents and voltages in the PV system are transmitted using APRS telemetry. -> Support for UMB Binary porotocol as a mater. ParaAPRS can be used as a standalone weather station controller w/o using the radio transmission. The sw by default sends the measuremenets values 2. ParaAPRS HARDWARE The ParaTNC software can run on STM32VLDISCOVERY board but it really shows it full potential od it's own dedicated hardware. This not only rub out all bodge wires required with prototype board. It gives few features which are hardly not possible without dedicated PCB a) Two different grounds separated one from the another (HW Revision A and B) -> Controller -> DB9 connector used to interface with a radio and Wind & Temperature sensor aa) ONLY IN HW REVISION C: Three different grounds separated one from the another -> Controller -> DB9 connector used to interface with a radio -> Wind and temperature sensor including RS485 bus b) Isolated DC-DC coverter to supply sensors with an option to connect another external power supply itself c) A relay used as a watchdog to reset wind & temperature sensor in case that no communication will be received. d) RS232 serial port avaliable on Cisco style RJ45 connector. e) RS485 serial port interchable with RS232 (with HW Revision A) or working fully independly (HW Revision B) f) PCB designed to fit into Mikrotik RB411/RB711 enclosure. ParaTNC PCB could be manufactured used a set of generber files locates in ./hardware/ directory a long with schematics and layout renders (top and bottom layer). 3. CURRENT OPEN POINTS AND ISSUES RELATED TO HW & SW As usually every design has some flaws, less or more important. In case of ParaTNC they can be divided into two parts, separately for software and hardware. Firstly in case of software an end user should USE ALWAYS THE SOURCE CODE WITH THE NEWEST TAG marked as non-beta (like DE07). ParaTNC repository is used for daily development, so the last commit can even sometimes don't compile at all, or consist some major bugs.  Hardware workarounds in HW Revision A: -> Missing resistor in series with base of transistor T2. External 1k must be added in series with TX line -> Foortprint location of R7 (RX_LVL) and R8 (TX_LVL) helipots are 'not optimal'. If 'normal' pots are to be used the vertical version must be chosen as flat one won't fit due to neighbouring components location. -> J1 power-in jack has reversed polarity (negative center) -> The chineese manufacturer dropped the TX20 anemometer from the production which means that a supoprt to it became a little bit obsoloete for new installations. Support for Davis 6410 anemometer or any another with pulse output for windspeed and potentiometer (resistance output) for direction is ongoing and should be avaliable in HW-Revision B and further SW releases. Hardware workarounds in HW Revision B: -> Few missing traces in micro supply. Few bodge wired needs to be added. Please look at hardware-revision-b-errata.jpg in 'hardware' 4. LICENSING ParaTNC software and hardware are licensed under terms included to the source code in 'LICENSE' file 5. SUPPORTED METEO SENSORS a) Wind sensors: - TX20 (not in manufacturing anymore) - Davis 6410 or any another analogue anemometer with resisntance as a direction output and impulses as a windspeed WARNING: Not avaliable in Hardware Revision A due to lack of circuitry. Fully working only in HW-Rev C - Lufft V200A/Ventus or any other UMB compatible device. - Any Modbus-RTU sensor b) Pressure Sensors: - MS5611 - Bosh BMP280 - Any UMB protocol compatible device - Any Modbus-RTU sensor c) Temperature sensors: - Dallas One wire DS18B20 - Any UMB protocol compatible device - Any Modbus-RTU sensor d) Humidity Sensors: - DHT22 - Bosh BMP280 - Any Modbus-RTU sensor (F&F MB-AHT1 is recommended) 6. SUPPORTED FEATURES OD VE.Direct PROTOCOL Most of Victron devices have a support both for binary and text serial protocol. By default the text procol (VE.Direct) is always enabled and a device will send from its own telegrams each couple of seconds. The communication via VE.Direct is avaliable through dedicated socket on the charging controller which is just 3.3V TTL levels UART, so no external ICs is required to connect the PV controller to an evaluation board. In the MPPT series the comm socket is located on the bottom side of the charging controller below the fuse holder. Exact pinout of the VE.Direct comm socket is as follows, assuming that terminal screws are facing down: -> Ground -> TX, data from host to the PV controller -> RX, data from PV controller to the host The controller sends a lot of different data which cannot be completely transmitted through APRS network due to radioprotocol limitations. Only these parameters are transmitted: -> Battery Current (charging as positive, discharging as negative) in third channel of telemetry. -> Battery Voltage as fourth telemetry channel. -> PV cell Voltage as fifth telemetry channel. -> Charging Controller status (like current charging mode) and minimum/maximum battery current in last 10 minutes. -> Error Codes if any (short circuit, overheat, overvoltage on PV or battery input) 7. TELEMETRY If the VE.Direct protocol suppot is disabled the ParaTNC uses telemetry packets to send internal statistics and general information about communication with sensors. Telemetry works in 10 minutes cycle, which means that packets are sent every 10 minutes and they represents a state for the time between one and another. Analog channels: 1st Channel: Number of packets received in 10 minutes. 2nd Channel: Number of packets transmitted in 10 minutes (digi-ed + generated internally by the controller) 3rd Channel: Number of digipeated packets in 10 minutes. 4th Channel: Number of packet received from Host by KISS protocol 5th Channel: Optional temperature from Dalls One Wire sensor. Digital Channels: DS_QF_FULL - Quality Factor for One Wire temperature sensor is FULL DS_QF_DEGRAD - Quality Factor for One Wire temperature sensor is DEGRADATED DS_QF_NAVBLE - Quality Factor for One Wire temperature sensor is NOT AVALIABLE MS_QF_NAVBLE - Quality Factor for MS5611 pressure sensor ins NOT AVALIABLE DHT_QF_NAVBLE - Quality Factor for DHT22 humidity & temperature is NOT AVALIABLE WIND_QF_DEGR - LaCrosse TX20 anemometer driver dropped at least one measuremenet due to excesive slew rate. WIND_QF_NAVB - Explantion of Quality Factors: Each measuremenets signal is kept along with the Quality Factor which represents the sensor condition and value validity. If the QF is set to FULL it means that no communication problems happened between one telemetry cycle and another DEGRADATED is set if at least once the communication problem happened (CRC calculation fail, timeout etc). NOT AVALIABLE is set if all communication atempts failed and no valid measuremenet value is avaliable. By default each Quality Factor is set to NOT AVALIABLE after the telemetry packets are sent. The TX20 anemometer driver has a Slew Rate Limiter which keeps out all 'spikes' in values mostly due to RF interference. if the difference between two consecutive measuremenets excedes hardcoded limit (9m/s) the software drops the value. 8. CONFIGURATION At this point ParaTNC is delivered in form of source code which needs to be manually compiled by the user. Most options are configured by #define in './include/station_config.h' and then hard-coded by the C preprocessor during compilation. An example file consist a lot of comments which explains what is what, but generally an user can choose there which mode should be enabled: Hardware Revision A: -> KISS TNC -> KISS TNC + DIGI -> KISS TNC + DIGI + METEO -> VICTRON + DIGI + METEO -> VICTRON + DIGI Hardware Revision B & C: -> KISS TNC -> KISS TNC + DIGI -> KISS TNC + DIGI + METEO -> KISS TNC + VICTRON + DIGI + METEO -> KISS TNC + VICTRON + DIGI -> KISS TNC + UMB-MASTER + DIGI + METEO In Hardware Revision A there is no option to use a KISS modem and the VE.Direct protocol in the same time as only one UART in the micro is used and handled by software. In hardware revisions B and C two UARTS are used and handled by the software. The KISS modem is always enabled and avaliable on RJ45 Cisco style jack. The KISS modem runs on default speed of 9600 bps. Telemetry is enabled by default and it will trasmit channels values each 10 minutes and full channel descriptions each 70 minutes. 9. TOOLCHAIN To build the ParaTNC software 'GNU ARM Embedded Toolchain' is required. This set contains gcc-arm-none-eabi compiler, gdb debugger, linker, HEX generator and set of libraries. ParaTNC is developed in Xubuntu 16.04LTS and 20.04LTS using toolchain in version 2018-q2. Please take note that You have to use 64-bit version of the operation system as the 32-bit variant of the toolchain is not avaliable. Exact GCC version is 7.3.1 and it present itself with a string like this below gcc version 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907] (GNU Tools for Arm Embedded Processors 7-2018-q2-update) Self conatined TAR.BZ2 archive with all required tools can be found here: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads in 'What's new in 7-2018-q2-update' section pulled down from the list located in the middle of this site. Alternatively You can use this link: http://pogoda.cc/d/gcc-arm-none-eabi-7-2018-q2-update-linux.tar.bz2 After download the content of this archive has to be uncompressed into: /usr/local/bin/gcc-arm-none-eabi-7-2018-q2-update/ so the structure should looks like this mateusz@mateusz-ThinkCentre-M720q:/usr/local/bin/gcc-arm-none-eabi-7-2018-q2-update$ ls -la total 24 drwxrwxr-x 6 mateusz mateusz 4096 paź 10 08:35 . drwxr-xr-x 7 root root 4096 paź 10 18:06 .. drwxr-xr-x 6 mateusz mateusz 4096 cze 22 2018 arm-none-eabi drwxr-xr-x 2 mateusz mateusz 4096 cze 22 2018 bin drwxr-xr-x 3 mateusz mateusz 4096 cze 22 2018 lib drwxr-xr-x 4 mateusz mateusz 4096 cze 22 2018 share mateusz@mateusz-ThinkCentre-M720q:/usr/local/bin/gcc-arm-none-eabi-7-2018-q2-update$ Both a makefile and an Eclipse project are configured to look for toolchain in this directory. In some cases to perform a debugging in Elipse You will have to install libncurses5 library which is required to start GDB. To check if this is a case try to start the debugger manually by issuing such command in the prompt '/usr/local/bin/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-gdb --version' If such result will be printed in the console, libncurses5 must be installed, prefferably using system package manager like aptitude in Debian/Ubuntu 'libraries: libncurses.so.5: cannot open shared object file: No such file or directory' To start debugging session in Eclipse you must create new 'GDB OpenOCD Debugging' configuration and set paths to OpenOCD and GDB in 'Debugger' tab. OpenOCD usually sits in '/usr/bin/openocd', the path to GDB is shown in the paragraph before. Remember to set 'Config Options:' to tell the OpenOCD what JTAG adapter/debugger is used in Your setup. If You're using ST-Link/V2 paste '-f interface/stlink-v2.cfg -f target/stm32f1x_stlink.cfg' 10. DOWNLOADING THE SOURCE CODE AND COMPILING IT When everything is installed the reporistory can be cloned to local harddrive by using a command 'git clone https://github.com/sp8ebc/ParaTNC' The example config file is named 'station_config_example.h' and should be edited and then renamed to 'station_config.h'. When everything is configured it is a time to go to 'Debug' directory and invoke command 'make' there. The source should be automatically compiled and new hex file 'ParaTNC.hex' should appear in the same directory. Please do not use Release configuration!! It is screwed and produces an application which doesn't works exactly as it should because of optimalization configuration. Finished building target: ParaTNC.elf Invoking: Cross ARM GNU Create Flash Image arm-none-eabi-objcopy -O ihex "ParaTNC.elf" "ParaTNC.hex" Finished building: ParaTNC.hex Invoking: Cross ARM GNU Print Size arm-none-eabi-size --format=berkeley "ParaTNC.elf" text data bss dec hex filename 50542 576 5544 56662 dd56 ParaTNC.elf Finished building: ParaTNC.siz 22:29:38 Build Finished (took 13s.231ms) 11. LOADING THE HEX FILE USING THE SERIAL BOOTLOADER If You don't have a JTAG programmer/debugger or You just not want to or can't use it for any reason, You can choose Internal Serial Bootloader provided by STMicroelectronics. It's code is stored in mask ROM within microcontroler and can be used anytime, and in scope of ParaTNC it practically cannot be disabled or locked. Please remember that this option is avaliable only if You're using ParaTNC PCB as STM32VLDISCOVERY board doesn't have TTL-RS232 converter. To use serial bootloader You need: - RJ45 to DB9 Cisco style RS232 cable - FlashLoader Demonstrator software provided by STMicroelectronics for free The required software can be downloaded from this link: https://www.st.com/en/development-tools/flasher-stm32.html It is advised to read the user manual for this tool before proceding further. To jump to the bootloader You shall disconect power to ParaTNC, then use something to short the jumper located at the left of JTAG connector (top-left corner of PCB) and with jumper shorted reconnect the power supply. If procedure success You shall NOT hear relay clicking and LEDs blinking for a short while. After the power supply is connected and micro stays in bootloader you can disconnect the jumper and start the FlashLoader software to download the HEX file to micro. After process is done you should do a cold reset without jumper shorter. 12. LOADING THE HEX FILE INTO STM32VLDISCOVERY BOARD The STM32VLDISCOVERY board has an ST-Link/V1 programmer-debugger on board which can be used to load a HEX file. This ST-Link appears normally as a mass storage device which makes in unusable to be used by HEX loadin software in Linux (as the device will be 'blocked' by the mass-storage driver). To workaround this problem, a configuration of modprobe daemon should be changed to ignore the ST-Link and not load any driver for it. This is done by invoking a command: 'sudo echo "options usb-storage quirks=483:3744:i" >> /etc/modprobe.d/stlink_v1.conf' What will create a new file called 'stlink_v1.conf' in modprobe directory. After the system reboot changes should be applied and the programmer should be free to go. The kernel log should looks somehow like this below [90639.895886] usb 2-1.1: new full-speed USB device number 13 using ehci-pci [90639.990288] usb 2-1.1: New USB device found, idVendor=0483, idProduct=3744 [90639.990294] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [90639.990296] usb 2-1.1: Product: STM32 STLink [90639.990298] usb 2-1.1: Manufacturer: STMicroelectronics [90639.990300] usb 2-1.1: SerialNumber: Qÿr\xffffff86RV%X\xffffffc2\xffffff87 [90639.990796] usb-storage 2-1.1:1.0: USB Mass Storage device detected [90639.992973] usb-storage 2-1.1:1.0: device ignored The next step is to install texane-stlink which supports the ST-Link/V1 programmer and can be used to read an write the flash memory. Installation is quite straight forward 'git clone git://github.com/texane/stlink.git' 'cd stlink.git' 'make' 'cd build/Relase' 'sudo cp st-* /usr/bin' At the end the HEX file can be loaded into the microcontroler by typing a command 'sudo st-flash --format ihex write /dev/sr0 ParaTNC.hex'