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multipass is a C++ Library Operating System for a few embedded architectures. As such, it does not provide multi-threading support or similar conveniences. Its objective is similar to the Arduino environment: provide a simple framework for embedded application/driver development and evaluation with a main() and optional loop() function and a text output channel, and then get out of the way as much as possible. It favors simplicity over performance and abstraction. Re-using components outside of multipass should be fairly simple.

Application, architecture, and drivers are configured using make config (X11, kconfig-qconf) or make nconfig (Terminal, kconfig-nconf). Each application must implement int main(void) and do everything itself from that point on. If the loop or wakeup features are enabled, void loop(void) or void wakeup(void) must be implemented as well.

Supported Architectures

ATMega168P, ATMega328P (Arduino Nano)

  • I²C controller
  • SPI controller
  • UART input/output
  • WS2812B output via Adafruit NeoPixel driver
  • ADC

ATMega2560

  • I²C controller
  • UART input/output on USART0 / USART1 / USART2 / USART3
  • DMX output on USART1 / USATR2 / USART3
  • ADC

LM4F120H5QR (Stellaris Launchpad)

  • UART output

MSP430FR5969 (MSP430 Launchpad)

  • I²C controller on eUSCI_B0
  • SPI controller on eUSCI_B0
  • UART input/output on eUSCI_A0 / eUSCI_A1
  • DMX output on eUSCI_A1
  • ADC

MSP430FR5994 (MSP430 Launchpad)

  • I²C controller on eUSCI_B1
  • SPI controller on eUSCI_B1
  • UART input/output on eUSCI_A0
  • DMX output on eUSCI_A1 / eUSCI_A2 / eUSCI_A3
  • 20bit mode (use up to 256kB FRAM for code and data)
  • ADC (partially)

RM46L8 (Hercules RM46L8 Launchpad)

  • UART output

STM32F446RE (NUCLEO-F446RE)

  • UART output on USART2

STM32F746ZG (NUCLEO-F746ZG)

  • UART output on USART3

POSIX (e.g. running as linux thread on a raspberry pi)

  • I²C controller via /dev/i2c
  • stdin/stdout

Supported Peripherals

Sensors

  • AM2320 Temperature+Humidity (I²C)
  • BME280 Temperature+Humidity+Pressure via Bosch SensorTec driver (I²C)
  • BME280 Temperature+Humidity+Pressure+IAQ via Bosch SensorTec driver (I²C)
  • CCS811 VOC (I²C)
  • HDC1080 Temperature+Humidity (I²C)
  • LM75 Temperature (I²C)
  • MAX44006 R+G+B+Clear+IR irradiance (I²C)
  • MAX44009 illuminance (I²C)
  • MPU9250 accelerometer+gyroscope+magnetometer (I²C)
  • SCD4x CO₂+Temperature+Humidity (I²C)
  • SEN5x PM1.0+PM2.5+PM4.0+PM10+Temperature+Humidity+VOC (I²C)
  • VEML6075 UVA+UVB irradiance (I²C)

"VOC" refers to volatile organic compounds; "PM" refers to particulate matter.

Displays

  • LS013B4DN04 / 430BOOST-SHARP96 96×96 transflective LCD (SPI)
  • Pervasive Aurora Mb V230/V231 4.2" iTC E-Paper Display via EPD Extension Board Gen 2 (SPI)
  • SSD1306 128×64 / 128×32 OLED display controller (I²C)

Others

  • ADS111x ADC (I²C)
  • DS2482 1-Wire Bus Controller (I²C)