Initial commit

README.md

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+# Rustphone
+
+(temporary name) (early development)
+
+OS for a dumbphone based on Maduino Zero 4G LTE board.
+
+## Install tools
+
+```bash
+sudo pacman -S arm-none-eabi-gcc
+rustup target add thumbv6m-none-eabi
+```
+
+## Run simulator
+
+```bash
+cargo run
+```
+
+## Build
+
+```bash
+cargo build --release --target thumbv6m-none-eabi --no-default-features
+```
+
+## 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
+
+3 pins for the display SPI, 3 pins for the 74HC565 (keypad), 3 pins for the 74HC165 (keypad)
+
+## 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/
+
+## 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.
+
+ncb1	upz2	tdk3
+eow4	lqh5	age6
+sfx7	rmj8	ivy9