Smooth video playback on STM32 and ST7735

Parts: - cheap "bluepill" STM32 ($1.50) - 160x128 ST7735 LCD ($2.60) - SD card Comments: - SD uses faster STM32 SPI1 interface which supports 36 Mbps - Not all SD cards work at 36MBps - Slow card at 18Mbps gives 22-23fps - Fast card at 18Mbps gives 25-26fps - Fast card at 36Mbps gives 33-34fps - SdFat library uses DMA mode for SPI transfer - Big buffer in RAM is used to speed up SPI/DMA transfer from SD - SPI1 is shared between LCD and SD card - Demo videos used here are taken from my older video and are not optimal (200x120 resolution - only 160x120 part is displayed on LCD) - Raw/uncompressed video data can be prepared using FFMPEG Follow-up video: https://youtu.be/6Uh5Iu-erO0 Older video playback examples: https://www.youtube.com/watch?v=9n9LHX6vwKc https://www.youtube.com/watch?v=7-NHFz5MuoQ Demo code - at my GitHub: https://github.com/cbm80amiga/ST7735_SDVideoPlayback If you find it useful and you want to buy me a coffee or a beer: https://www.paypal.me/cbm80amiga