README

This project works as a RPN calculator running on the RP2040 microcontroller. Work in progress.

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Hardware:

• Raspberry Pi Pico (recommended in H variant)
  • Possible to use another RP2040-based board
• Raspberry Pi Debug Probe
  • You can use a second Pico in its place, see here
• SSD1306-based OLED display
  • Monochrome
  • 128x64 px
  • Capable of I²C interfacing
• Some jumper wires
• Breadboard (recommended)

Connect display as follows (recommended pin in bold):

• VCC --> pin 36 (3V3 Out)
• GND --> pin 3, 8, 13, 18, 23, 28 or 38 (GND)
• SDA --> pin 11 (GP8 - SDA)
• SCL --> pin 12 (GP9 - SCL)

Connect Debug Probe's SWD interface to the debug header, and its UART interface as follows:

• RX --> pin 1 (GP0 - TX)
• TX --> pin 2 (GP1 - RX)
• GND --> pin 3, 8, 13, 18, 23, 28 or 38 (GND)

Compilation

1. Install the Rust compiler on your platform: https://rust-lang.org/tools/install/
2. Install the toolchain:

   rustup target install thumbv6m-none-eabi
   

3. Clone this repository and switch to appropriate branch
4. Install the linker:

   cargo install flip-link
   

5. Install the flasher:

   cargo install --locked probe-rs-tools
   

6. Power on your Pico and connect your Debug Probe
7. Compile and flash the project:

   cargo run