ST7735_SDVideoPlayback
Smooth video playback from SD on STM32 and ST7735 1.8" 128x160 using DMA and fast SPI 36Mbps interface
Achieved 34 fps using fast Samsung SD card
YouTube video:
https://youtu.be/o3AqITHf0mo
Connections (header at the top):
| LCD pin |
LCD pin name |
STM32 |
| #01 |
LED |
3.3V |
| #02 |
SCK |
PA5/SCK |
| #03 |
SCA |
PA7/MOSI |
| #04 |
A0/DC |
PA1 or any digital |
| #05 |
RESET |
PA0 or any digital |
| #06 |
CS |
PA2 or any digital |
| #07 |
GND |
GND |
| #08 |
VCC |
3.3V |
| SD pin |
SD pin name |
STM32 |
| #01 |
SD_SCK |
PA5 |
| #02 |
SD_MISO |
PA6 |
| #03 |
SD_MOSI |
PA7 |
| #04 |
SD_CS |
PA4 |
Comments:
- Tested with stm32duino and Arduino IDE 1.6.5
- 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 in the video are taken from my older project and are not optimal (200x120 resolution - only 160x120 part is displayed on LCD)
If you find it useful and you want to buy me a coffee or a beer:
https://www.paypal.me/cbm80amiga