The purpose of this project is to build a general purpose, interactive computer out of an rp2040, while learning practical programming using the Forth language.

file: gpio.fs

Given a pin number, return the pin's address on the IO bank.

13 pin

Given a pin address, leave the number of the currently selected pin function on the stack.

13 pin funcsel@

Given a pin address and a function number (see GPIO pin constants), set the selected pin's function.

13 pin SIO funcsel!

Display a list of all GPIO pins and their currently selected function.

pins

Given a pin number, enable or disable that pin for output.

13 output-enable
13 output-disable

Given a pin number, leave a flag on the stack indicating whether or not output is enabled.

13 output-enabled?

Display a table of pins and their output status.

output-enabled.

file: terminal.fs

• Timers
• Blocks
• SPI
• U2F image