Charles Childers
Retro is an concatenative, stack based language with roots in Forth. This implementation of the VM, when coupled with a 16-bit image, allows for a complete, interactive programming environment running on the mbed microcontroller. This requires an image file (grab the latest at [[http://rx-core.org/retroImg]]) to operate. The image file contains the actual Retro language and environment, and also includes support for interactive control of the digital I/O pins on the mbed. == Quickstart == Throw the rx_mbed .bin on your mbed, along with the retroImg file. Reset, and connect in your terminal emulator. Then do: <<code>> with mbed' 1 LED1 p! <</code>> And the first onboard LED should light up. Then: <<code>> 0 LED1 p! <</code>> And it should turn back off. == Notes == Pins 5 - 30 are exposed via constants //P5// - //P30// in the //mbed'// vocabulary. These are mapped as DigitalInOut, and can be read using //p@// and written to using //p!//. The four onboard LED's are exposed via constants //LED1// - //LED4// and are mapped as DigitalOut devices. With the standard image loaded, you get around 3800 cells of memory to play with. (Cells are 16-bit values; the VM does not allow for addressing smaller or larger data sizes directly). This is not a lot, but should be enough to allow a fair amount of experimenting. == Tested I/O Devices == I have only a limited amount of hardware at this point. All I've tested are: * LEDs * Piezo Buzzer I'm hoping to be able to test other components in the near future, but first need to locate, purchase, and assemble them.