Arduino core support for STM32L082-based boards

This repository is MCCI's version of Arduino_Core_STM32, adapted for the STM32L082. The BSP here targets the STM32L082 as used in the Murata CMWX1ZZABZ LoRa® module, as further in the MCCI Catena® LoRaWAN® technology boards. Several of these boards are closely compatible with the Adafruit Feather M0 LoRa. See Supported Boards and CPUs for more info.

For general information, please check the stm32duino README.md, especially the Getting Started section.

Contents:

• Getting Started
• Features
• Supported Boards and CPUs
  • Catena 461x Series
    • Sensors on Catena 4612, 4617, and 4618
  • Catena 4630 Features
  • Catena 480x Features
  • Model 4916 Features
  • Model 4917 Features
• Troubleshooting
• Installing a Development Copy of this BSP
• Release History
• Notes and Acknowledgements
• Support Open-Source Software, Hardware, and Community IoT

Getting Started

This repository is available as a package usable with the Arduino Boards Manager. Add this URL to "Additional Boards Manager URLs" under File>Preferences:

https://github.com/mcci-catena/arduino-boards/raw/master/BoardManagerFiles/package_mcci_index.json

For full instructions on using the "Boards Manager", see Installing the MCCI Catena BSP.

Features

The Arduino IDE allows you to select the following items.

• LoRaWAN Region: when using the Arduino LMIC, you can select North America, Europe, Australia, Asia-923, Japan, Korea, or India as your target region.
• Optimization: choose smallest, fast, faster, fastest, or debug.
• Serial interface: Select "USB Serial", "Generic Serial" or "No Serial".
• System clock: Select "32 MHz (most power)", "24 MHz", "16 MHz", "4.194 MHz (no USB)" or "2.097 MHz (no USB, least power)". If "2.097 MHz (no USB, least power)" or "4.194 MHz (no USB)" is selected, then you cannot use "USB Serial" for serial interface.
• Upload method: select Mass Storage, DFU, or STLink. DFU works well, but requires use of the boot jumper to select DFU mode, and a little driver wrangling on Windows.

Supported Boards and CPUs

Board	CPU/SOC/Module	Section	Comment
MCCI Catena 4551	Murata CMWX1ZZABZ module, STM32L082	461x	Obsolete
MCCI Catena 4610	Murata CMWX1ZZABZ module, STM32L082	461x	LiPo battery
MCCI Catena 4611	Murata CMWX1ZZABZ module, STM32L082	461x	Special order only
MCCI Catena 4612	Murata CMWX1ZZABZ module, STM32L082	461x	Primary battery, BME280
MCCI Catena 4617	Murata CMWX1ZZABZ module, STM32L082	461x	Primary battery, HS3001
MCCI Catena 4618	Murata CMWX1ZZABZ module, STM32L082	461x	Primary battery, SHT31-DIS-F
MCCI Catena 4630	Murata CMWX1ZZABZ module, STM32L082	4630	LiPo battery,ZMOD4410, PMS7003
MCCI Catena 4801	Murata CMWX1ZZABZ module, STM32L082	480x	Primary battery, Modbus
MCCI Catena 4802	Murata CMWX1ZZABZ module, STM32L082	480x	Primary battery, Modbus, SHT31-DIS-F, I2C Expander
MCCI Model 4916	Murata CMWX1ZZABZ module, STM32L082	4916	Type-C battery, GPS, BME680, SHT31-DIS-F, IPS7100, Spec sensors, SCD30
MCCI Model 4917	Murata CMWX1ZZABZ module, STM32L082	4917	Primary battery, JST-XH for OneWire sensor

Catena 461x Series

Feature	4551	4610	4611	4612 / 4617 / 4618
TCXO control	Always on (power consumption issue)	Controlled by code	Controlled by code	Controlled by code
Battery type	Primary (non-rechargeable) reference is 2x AAA cells	Secondary (LiPo rechargeable), compatible with Adafruit	Feather batteries	Primary (non-rechargeable) reference is 2x AAA cells
System voltage	3.3V	3.3V	3.3V	2.2V to 3.3V, depending on whether boost regulator is enabled.
Regulator control	EN pin on Feather disables VDD altogether	No boost regulator; EN disables VDD altogether.	EN pin on JP2-3 shuts down boost regulator	EN output from CPU controls boost regulator. 4612/4617/4618 normally run with boost regulator off for lower power.
High-side switch for external sensors	No switch, screw terminal power is from VDD (3.3V)	High-side switch allows software to turn off power to the external sensor screw terminals	High-side switch allows software to turn off power to the external sensor screw terminals	High-side switch allows software to turn off power to the external sensor screw terminals
Feather electrical compatibility	Good, except for different battery system	Very good	Very good	Good physical compatibility but the varying VDD may be an issue
Feather physical compatibility	Yes	Yes	Yes	Yes
USB	Supported	Supported	Supported	Supported
Sensors	BME280, Si1123	BME280, Si1113	BME280, Si1113	See Catena 4612/7/8 Sensors, below
Screw terminals for external sensors	2x4 pin	2x4 pin	2x4 pin	2x4 pin
Boot mode enable	Jumper	Dedicated switch	Jumper	Jumper

Sensors on Catena 4612, 4617, and 4618

All three boards incorporate a Silicon Labs Si1133 ambient light sensor. They differ in the environmental sensor.

Board	Sensor	Temperature	Humidity	Barometric Pressure	Comments
4612	BME280	Yes	Yes	Yes	Not suitable for outdoor applications or high-humidity environments.
4617	HS3001	Yes	Yes	No	Suitable for general-purpose use.
4618	SHT31-DIS-F	Yes	Yes	No	Sensor protected by an IP66 PTFE membrane, best for outdoor deployments.

Catena 4630 Features

The 4630 is a Feather-compatible board designed for field air-quality monitoring.

Feature	4630
TCXO Control	Controlled by code
Battery type	LiPo with on-board charger
System voltage	3.3V, plus programmable 5V regulator for PMS7003 PM2.5 sensor support.
Regulator control	No boost regulator for 3.3V; EN disables VDD altogether. D12 controls 5V boost regulator for PMS7003.
High-side switch for power for external sensors	No
Screw terminals for external sensors	None
Feather electrical compatibility	Yes
Feather physical compatibility	Yes
USB	Yes, DFU download, runtime data, and charging
Sensors	ZMOD4410 VOC sensor; BME280 temperature/pressure/humidity
External interfaces	TTL Serial, dedicated cable for connecting to PMS7003 PM2.5 sensor

Catena 480x Features

The 480x is a dedicated board for remote Modbus applications, using the Murata module.

Feature	4801	4802
TCXO Control	Controlled by code	Controlled by code
Battery type	Primary battery, boost regulator (but can tolerate up to 3.7V battery)	Primary battery, buck regulator (but can tolerate up to 5V battery)
System voltage	2.2V to 3.3V, depending on whether boost regulator is enabled.	3.6V to 5V
Regulator control	EN output from CPU controls boost regulator, and 4801 normally runs with boost regulator off for lower power.	Always enabled if +VIN present.
High-side switch for power for external sensors	Yes	Yes
Screw terminals for external sensors	1x4 pin	2x4 pin
Feather physical compatibility	No	No
USB	Not supported	Not supported
Sensors	none	SHT31
External interfaces	Modbus, TTL serial	Modbus, TTL serial, I2C Expander

Model 4916 Features

The 4916 is a dedicated board designed for monitoring air quality.

Feature	4916
TCXO Control	Controlled by code
Battery type	Primary (non-rechargeable) reference is Type-C battery
System voltage	3.0V to 3.5V, depending on whether boost regulator is enabled.
Regulator control	EN output from CPU controls boost regulator.
High-side switch for power for external sensors	Yes
Screw terminals for external sensors	None
QWIIC for external sensors	Yes
Feather physical compatibility	No
USB	No
Sensors	BME680, SHT31, GPS, IPS7100, SCD30
External interfaces	TTL Serial

Model 4917 Features

The 4917 is a dedicated board designed for temperature monitoring using onewire probe.

Feature	4917
TCXO Control	Controlled by code
Battery type	Primary (non-rechargeable) reference is 2x AAA cells
System voltage	2.2V to 3.3V, depending on whether boost regulator is enabled.
Regulator control	EN output from CPU controls boost regulator.
High-side switch for power for external sensors	No
Screw terminals for external sensors	None
JST-XH for external sensors	Yes
Feather physical compatibility	No
USB	Yes, DFU download, runtime data
Sensors	None
External interfaces	TTL Serial

Troubleshooting

If you have any issue, you may file an issue on GitHub. You may also submit a support request on the MCCI support forum.

Installing a Development Copy of this BSP

If you want to develop and test changes to this package, we suggest the following.

1. Install the current release from the standard location using the Arduino Tools>Boards>Boards Manager... menu. This installs tools and so forth.

2. Select a board supported by this package.

3. Create an empty sketch with Arduino File>New, and check that you can build.

4. Close the Arduino IDE.

5. Clone this repo to a convenient spot on your computer.

6. Open a command window and go to the Arduino board installation directory. It will be one of the following.

   System	Location
   Windows 7 through 10	c:\Users\username\AppData\Local\Arduino15. If you're using git bash, you can also use ~/AppData/Local/Arduino15
   macOS	~/Library/Arduino15
   Linux	~/.arduino15

7. From this location, change directory to packages/mcci/stm32.

8. Look at the directory contents with ls. You'll see a directory named like a version number, for example 1.0.8.

9. Move the directory you just found away from the stm32 directory. It's convenient to have it around, so we suggest that you not delete it.

10. Create a symbolic link to the sandbox you created in step (3) above. On macOS and Linux, this is done using the ln -s command. On Windows 10, this is done with the mklink /d command. (On older versions of Windows, unless you're very experienced, you might want to use a Linux VM in VirtualBox -- we can't advise on the best way to do this.)

11. Open the Arduino IDE.

12. Use the menu File>New to create an empty sketch (or reuse the sketch from step 3).

13. Make sure the board you want to develop for is selected in Tools>Boards.

14. Make changes and build.

Remember to restart the IDE whenever you change platform.txt, boards.txt or programmers.txt.

Release History

• v3.1.0. Feature enhancement. Added support for new board Model 4917 (#196) and Model 4916 (#198). Added Two HW Serial support for Catena 4630 (#199).

• v3.0.5 Patch release. Don't use <algorithm> to implement min() and max() (#184). Prevent hangs if USB is enabled but D+/D- float to high/high (#189, #190) -- thanks to Mohammed Mayyan (@mmayyan) for help in finding this.

• v3.0.4 Patch release. Fix typo in tools/linux/stm32l0-upload that broke DFU on Linux.

• v3.0.3 Patch release. Fix typo in tools/macosx/stm32l0-upload that broke DFU on macOS.

• v3.0.2 Patch release. Update mccibootloader_image tool to v0.4.0 (#171) to fix problem with ELF files with unusual number of program headers.

• v3.0.1 Patch release. Make "download with bootloader" the default choice in the IDE (#158). Windows "download with bootloader was broken for DFU (#164) and STLink (#167).

• v3.0.0 Switch to true semantic versioning #150. Add support for MCCI trusted bootloader #148, #149, #151, #153. Enable interrupts on entry to reset vector for consistency with ST bootloader.

• v2.8.0 Added support for new board: 4802, #143.

• v2.7.0 adds UI support for LoRaWAN network and subband selection, #22. Note, though, that the UI options must be implemented by your target LoRaWAN stack in order to be effective.

• v2.6.1 fixed numerous compile warnings. Also fixed #78, which resulted in occasional reuse of the entire input ring buffer.

• v2.6.0 adds support for KR-920 (Korea 920 MHz) in the region selection menu (#117). Adds official library.properties fields for linking pre-compiled object and adds additional pins definitions for SX1276 radios (#128) (thanks to Kent Williams). Add source-level debugging support (#122). Adjust USB Vbus check values for Catena 461x platform. Define AU915 as well as AU921 for LMIC migration (#131). Fix link "warning: changing start of section .bss by 4 bytes" (#129). Update issue template.

• v2.5.0 enables the crystal controlled LSE clock, and uses it to run the RTC. Code was substantially refactored to move common code to common directories. Bug fixes.

• v2.4.0 Added support for new boards: 4617, 4618 and 4630. Serial interface configuration in boards.template has been updated with new option to use both USB Serial and Hardware Serial at same time.

• v2.3.0 corrects the handling of clocking in the various SLEEP/STOP/SSTANDBY modes. It also ensures that .RamFunc code is properly placed in RAM (initialzed when statics are initialized).

• v2.2.1 fixed the version number in platform.txt, and sets GPIO to reset state when de-initializing SPI, I2C and UARTs.

• v2.2.0 increases the serial buffer size to 256 and adds low-power changes for the Catena 4801.

• v2.1.0 fixed the device ID register offset, and improved sleep mode power.

• v2.0.0 is a major release. It improves wakeup support and power management, and simplifies some of the menus. New boards: 4610 and 4801. The template system was enhanced. USB manufacturer string is no longer "unknown". Changed hardware serial default baud rate to 115,200 from 9600. Moved USB clock control to USB module. Enhanced begin()/end() for USB and I2C to start/stop clocks. (This is a major bump beause the baud rate change may be a breaking change.)

• v1.1.2 added 4611, 4612 support, and templating for generating boards.txt.

Notes and Acknowledgements

MCCI and MCCI Catena are registered trademarks of MCCI Corporation. ChaeHee Won, Sungjoon Park, and Terry Moore of MCCI maintain this BSP.

LoRa is a registered trademark of the LoRa Alliance. LoRaWAN is a registered trademark of the LoRa Alliance.

All other trademarks are the property of their respective owners.

Support Open-Source Software, Hardware, and Community IoT

Everyone at MCCI invests time and resources providing this open-source code and open-source hardware. MCCI is also the principal corporate sponsor of The Things Network New York and Ithaca. Please support our work by purchasing products from MCCI! Visit our on-line store at store.mcci.com.