Generated by Doxygen from 01 - FLOW_FW/Core. The bridge reads the PMW3901 over SPI and serves the accumulated motion as an I²C target at 0x3B.

File	Content
`flow_regs.h`	the I²C register map, shared with the FC driver `flow_bridge.h`
`bridge.c`	register file and I²C target protocol (portable, host-tested)
`pmw3901.c`	PMW3901 driver: power-up, register sequence, motion burst
`main.c`	clocks, pins, SPI1, I2C1 interrupt, main loop, IWDG, LED