the code from px4 PX4Flow is an optical flow camera. Provides optical flow at 250 Hz. Unlike mouse sensors it works indoors without illumination LED. Details. ■168 MHz Cortex M4F CPU (196 KB RAM) ■752×480 MT9V034 imager, 3D Gyro ■16 mm M12 lens, microSD slot ■Buy from 3D Robotics Store

Flow-master
...........\.gitignore
...........\Flow.sublime-project
...........\Makefile
...........\README.md
...........\Tools
...........\.....\fix_code_style.sh
...........\.....\px_mkfw.py
...........\.....\px_uploader.py
...........\inc
...........\...\communication.h
...........\...\dcmi.h
...........\...\debug.h
...........\...\flow.h
...........\...\gyro.h
...........\...\i2c.h
...........\...\i2c_frame.h
...........\...\led.h
...........\...\main.h
...........\...\mavlink_bridge_header.h
...........\...\mt9v034.h
...........\...\settings.h
...........\...\sonar.h
...........\...\stm32f4xx_conf.h
...........\...\stm32f4xx_it.h
...........\...\usart.h
...........\...\usb_conf.h
...........\...\usbd_cdc_vcp.h
...........\...\usbd_conf.h
...........\...\usbd_desc.h
...........\...\utils.h
...........\lib
...........\...\README
...........\...\STM32F4xx_StdPeriph_Driver
...........\...\..........................\Release_Notes.html
...........\...\..........................\inc
...........\...\..........................\...\misc.h
...........\...\..........................\...\stm32f4xx_adc.h
...........\...\..........................\...\stm32f4xx_can.h
...........\...\..........................\...\stm32f4xx_crc.h
...........\...\..........................\...\stm32f4xx_cryp.h
...........\...\..........................\...\stm32f4xx_dac.h
...........\...\..........................\...\stm32f4xx_dbgmcu.h
...........\...\..........................\...\stm32f4xx_dcmi.h
...........\...\..........................\...\stm32f4xx_dma.h
...........\...\..........................\...\stm32f4xx_exti.h
...........\...\..........................\...\stm32f4xx_flash.h
...........\...\..........................\...\stm32f4xx_fsmc.h
...........\...\..........................\...\stm32f4xx_gpio.h
...........\...\..........................\...\stm32f4xx_hash.h
...........\...\..........................\...\stm32f4xx_i2c.h
...........\...\..........................\...\stm32f4xx_iwdg.h
...........\...\..........................\...\stm32f4xx_pwr.h
...........\...\..........................\...\stm32f4xx_rcc.h
...........\...\..........................\...\stm32f4xx_rng.h
...........\...\..........................\...\stm32f4xx_rtc.h
...........\...\..........................\...\stm32f4xx_sdio.h
...........\...\..........................\...\stm32f4xx_spi.h
...........\...\..........................\...\stm32f4xx_syscfg.h
...........\...\..........................\...\stm32f4xx_tim.h
...........\...\..........................\...\stm32f4xx_usart.h
...........\...\..........................\...\stm32f4xx_wwdg.h
...........\...\..........................\src
...........\...\..........................\...\misc.c
...........\...\..........................\...\stm32f4xx_adc.c
...........\...\..........................\...\stm32f4xx_can.c
...........\...\..........................\...\stm32f4xx_crc.c
...........\...\..........................\...\stm32f4xx_cryp.c
...........\...\..........................\...\stm32f4xx_cryp_aes.c
...........\...\..........................\...\stm32f4xx_cryp_des.c
...........\...\..........................\...\stm32f4xx_cryp_tdes.c
...........\...\..........................\...\stm32f4xx_dac.c
...........\...\..........................\...\stm32f4xx_dbgmcu.c
...........\...\..........................\...\stm32f4xx_dcmi.c
...........\...\..........................\...\stm32f4xx_dma.c
...........\...\..........................\...\stm32f4xx_exti.c
...........\...\..........................\...\stm32f4xx_flash.c
...........\...\..........................\...\stm32f4xx_fsmc.c
...........\...\..........................\...\stm32f4xx_gpio.c
...........\...\..........................\...\stm32f4xx_hash.c
...........\...\..........................\...\stm32f4xx_hash_md5.c
...........\...\..........................\...\stm32f4xx_hash_sha1.c
...........\...\..........................\...\stm32f4xx_i2c.c
...........\...\..........................\...\stm32f4xx_iwdg.c
...........\...\..........................\...\

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