Propeller Programming: Using Assembler, Spin, and C

© Sridhar Anandakrishnan 2018

Sridhar AnandakrishnanPropeller Programminghttps://doi.org/10.1007/978-1-4842-3354-2_8

8. Implementing the Compression Code in PASM

Sridhar Anandakrishnan¹ 

(1)

Department of Geosciences, University Park, Pennsylvania, USA

 

In this chapter and the next one, we will start to write some real PASM code to implement the compression. In this chapter, I will talk mainly about passing parameters to the PASM cog. In the next chapter, I will complete the compression and decompression code.

8.1 Passing Parameters to PASM

To reproduce the Spin code from steim_spin in PASM , we need to have a way to pass the addresses of sampsBuf and other arrays to the PASM cog. In Spin that was simple. @sampsBuf was the address, and it could be passed ...