grove-trackball-spin

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This is a P8X32A/Propeller, P2X8C4M64P/Propeller 2 driver object for the Grove mini-trackball.

IMPORTANT: This software is meant to be used with the spin-standard-library (P8X32A) or p2-spin-standard-library (P2X8C4M64P). Please install the applicable library first before attempting to use this code, otherwise you will be missing several files required to build the project.

Salient Features

• I2C connection at up to 400kHz (unenforced)
• Relative/delta and absolute position reporting
• Manually set absolute position
• Set absolute position constraints
• Set pointer sensitivity (delta step)

Requirements

P1/SPIN1:

• spin-standard-library
• input.pointer.common.spinh (provided by the spin-standard-library)

P2/SPIN2:

• p2-spin-standard-library
• input.pointer.common.spin2h (provided by the p2-spin-standard-library)

Compiler Compatibility

Processor	Language	Compiler	Backend	Status
P1	SPIN1	FlexSpin (6.9.4)	Bytecode	OK
P1	SPIN1	FlexSpin (6.9.4)	Native/PASM	OK
P2	SPIN2	FlexSpin (6.9.4)	NuCode	OK
P2	SPIN2	FlexSpin (6.9.4)	Native/PASM2	OK

(other versions or toolchains not listed are not supported, and may or may not work)

Hardware compatibility

• Tested with Seeed studio SKU# 101020091, hardware ver 1.0

Limitations

• Very early in development - may malfunction, or outright fail to build
• No 'CONFIRM' reg (click) support (planned)
• No LED configuration support (planned)