Target

Hardware

Cortex M7 (M7F?), 16MB of RAM

rev	links	MHz	FPU precision
A	STM32F746 (Datasheet)	180 MHz (up to 216 MHz)	SP
B	STM32H7B0 (Datasheet)	??? MHz (up to 280 MHz)	DP

Links:

• Playdate Wiki :: Hardware
• rustc target
• Rev Checker

FPU

• RevA has single precision FPU
• RevB has double-precision FPU

So, target feature is VFPv5 (issue, VFP explanation), but downgrade to ≈VFPv2 needed to run on RevA disabling f64.

To disable FPU usage entirelly just enable soft-float target-feature.

Rustc Target

triple: thumbv7em-none-eabihf

features:

• short enums
• hard float (opt)

entry point: eventHandlerShim : extern "C" fn (api: *const PlaydateAPI, e: PDSystemEvent, kc: u32) -> c_int