Using STM32's Hardware SPI(with simple DMA support) to drive a ST7789 based IPS display.
- 135*240
- 240*240
- 170*320 (new)
If you like, you could customize it's resolution to drive different displays you prefer.
For example, a 240x320 display is perfectly suited for st7789.
Just set all X_SHIFT and Y_SHIFT to 0, and set resolution to 240|320.
For more details, please refer to ST7789's datasheet.
Include st7789.h in main.c
for a simple test, you could refer ST7789_Test() function in while(1).
Don't forget to refer ST7789_Init(); before you use any functions...
This code has been tested on 240x240 & 170x320 LCD screens. You can look into demo directory for details.
DMA is only useful under huge dataflow conditions, e.g: Clear full screen or draw a bitmap.
Most MCUs doesn't have a large RAM, so a framebuffer is "cut" into pieces, e.g: a 240x5 pixel buffer for a 240x240 screen.
Some display won't work, you should consider adding a pull-up resistor on SCLK(SCK) and SDA(MOSI) pin.
The simplest way is to configure these 2 GPIO to Pull-up Mode manually in CubeMX(if supported) or in SPI initialization code.