[{"_1":2,"_64":-5,"_65":-5},"loaderData",{"_3":4,"_33":34,"_62":-5,"_63":-5},"root",{"_5":-5,"_6":-5,"_7":8,"_20":-5,"_21":22,"_23":24,"_27":28},"user","shoppingCartId","shoppingCart",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":12},"count",0,"free",true,"updatedAt","2025-12-23T16:06:36.002Z","paymentGateway","STRIPE","cartItems",[],"loading","toast","locale","en","constants",{"_25":26},"paypalClientId","AX53Cwz8jR6rVVzzZiZNWWXl0dGagi-GZrjG-S3Ua14E5nrKMn7DxDQ730O4R8LusLPp49ALn6aRVaEy","publishers",{"_29":30,"_31":32},"companies",[],"universities",[],"routes/_store+/_readers+/email_author.$slug/route",{"_35":36,"_61":-5},"book",{"_37":38,"_39":40,"_41":42,"_43":44,"_45":46,"_47":48},"id","Z2lkOi8vbGVhbnB1Yi9TdG9yZTo6Qm9va1Byb2R1Y3QvMjYwOTc","title","Propeller Programming","state","retired","contactAuthorMethod","email","aboutText","

The Propeller microcontroller is a powerful multi-processor chip that can be programmed in either a high-level language (C or Spin) or a much faster Assembly language (PASM). The prop is used in many educational projects and in hobby/maker applications as well is in a number of commercial products.

In this book, I use a data compression/decompression application to introduce PASM to the reader. First I go through the full algorithm is Spin and in C and then translate it to PASM. That way, if you know a high-level language, you can map the PASM steps to something familiar.

Integrating C and PASM code has particular challenges that I go through in detail.

I use Test Driven Development throughout, which is a powerful technique for validating your code.

I include a chapter on hardware interactions (setting and reading pins).

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