Microcontroller Propeller 2

4-bit SD driver

4-bit SD mode SD card driver plug-in for Eric Smith's FlexProp/Flexspin

DEBUG Plot Layer and Crop

Introduction PNut_v49p1 adds new DEBUG PLOT commands allowing up to 8 bitmap layers that you can selectively copy into the PLOT window. This is useful for doing photo-realistic displays, where pre-drawn images are copied into the plot window to show,…

Floating point

Introduction SPIN2 introduces native 32-bit floating point support for the Propeller 2. The implementation follows IEEE-754 encoding rules, with a bit sequence comprising a sign bit, followed by exponent and then mantissa (significand) bits. An interesting tool to experiment with…

Getting Started Video Tutorials

Introduction Parallax’s renowned expert Propeller programmer shares a series of introductory coaching sessions on programming in Spin2. These cover all the fundamental steps from selecting and connecting hardware, to programming the basic functions – and beyond! Jon also shares his…

Using the counter for timeouts

Introduction Each cog has independent counters that can run in the background and support your code without overhead. The counters can perform many operations, and here we mention using them for operation timers. Code Snippet These code snippets show an…

asmclk and the automatic clock setter

Introduction For customers writing PASM2 only programs, the compiler automatically prepends a clock-setter function to the code so that the system clock settings are automatically calculated and configured without the need for user configuration. It just works! If you don’t…

Sharing variables between SPIN2 and PASM2

Introduction Code for the Propeller 2 (whether written in the native SPIN2, C or other high level language), can usually benefit from a bit of PASM2 (assembly code) to help create super-fast drivers for real world interfacing! That PASM2 code…