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OS for a dumbphone
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README.md

Rustphone

(temporary name) (early development)

OS for a dumbphone based on Maduino Zero 4G LTE board.

Install tools

sudo pacman -S arm-none-eabi-gcc
rustup target add thumbv6m-none-eabi

Run simulator

cargo run

Build

cargo build --release --target thumbv6m-none-eabi

Pins

  • D2
  • D3
  • D4
  • D5 (internally assigned): modem power
  • D6 (internally assigned): modem reset
  • D7 (internally assigned): flightmode
  • D8
  • D9
  • D10
  • D11
  • D12
  • D13
  • A0
  • A1 (internally assigned): vbat
  • A2 (internally assigned): vsys
  • A3
  • A4
  • A5
  • SDA: I2C
  • SCL: I2C

Used pins:

  • display SPI: 3 pins
  • keypad: 6 pins (74HC565+75HC165), maybe 5 if the same clock is used
  • display LED: 1 pin
  • torch LED: 1 pin
  • ESP UART: 2 pins (I2C still possible if not enough pins)

Note: at most 5 outputs of the 74HC565 may be used as GPO.

components

https://www.makerfabs.com/maduino-zero-4g-lte-sim7600.html https://www.waveshare.com/1.54inch-e-Paper-Module.htm1 https://bulkmemorycards.com/shop/microsd-cards/microsd-32gb/sd-32gb-class-10/32gb-microsd-ultra-sandisk-memory-card-2/ Maybe an ESP for WIFI and Bluetooth.

crates

bitmap-font ? https://lib.rs/crates/at-commands OR https://lib.rs/crates/atat

Apps

  • Calculator
  • Config
  • Contacts
  • Journal
  • Play audio
  • Send call
  • Send message
  • Show bitmap

Keypad

Optimized to reduce the number of consecutive presses on the same key in French.

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