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1. Compile Firmware
git clone https://github.com/russhughes/st7789_mpy.gitPlace the entire st7789 folder from the st7789_mpy file into the usercmodules directory:
~/esp/micropython/examples/usercmodules/
“Compiling MicroPython Firmware for OV2640 and Other Cameras” compiled the camera driver. This time we need to compile both the camera driver and the ST7789 driver together, which requires editing the uesrmodules folder’s micropython.cmake file to make both drivers effective:
Then, compile the firmware:
make clean make USER_C_MODULES=~/esp/micropython/examples/usercmodule/micropython.cmake
import cameraimport st7789import micropythonimport espmicropython.mem_info()esp.flash_size()/1024/10242. Required Hardware
We purchased a 1.69-inch LCD display based on ST7789 with a resolution of 240X280. The pins are the same as those of the 0.96-inch LCD from Hezhao, and we directly inserted the 1.69-inch LCD into our designed ESP32-S3 expansion board.
3. Test Code
Place the images to be displayed in the root directory of the SD card, allowing the ESP32S3 to drive the ST7789 based LCD and cycle through the images on the LCD. The code is as follows:
from machine import Pin,SPI,PWM,SoftSPIimport st7789,sdcard,timesd = sdcard.SDCard(SoftSPI(1, sck=Pin(1), mosi=Pin(2), miso=Pin(3)), Pin(8))
os.mount(sd, '/sd')
os.listdir('/sd')
blk = PWM(Pin(13), duty=500, freq=1000)spi=SPI(1,baudrate=30000000, sck=Pin(18), mosi=Pin(17),miso=Pin(16))#Using SPI1, speed cannot be too high, too high will cause CPU to restart. It was tested that above 30000000 will cause restart st7789.ST7789(spi, 240, 320, reset=Pin(16, Pin.OUT), dc=Pin(15, Pin.OUT), cs=Pin(14, Pin.OUT))tft=st7789.ST7789(spi, 240, 320, reset=Pin(16, Pin.OUT), dc=Pin(15, Pin.OUT), cs=Pin(14, Pin.OUT),backlight=Pin(13),inversion=True)
#If the image is inverted, be sure to modify this parameter: inversion=Falsetft.init()tft.rotation(0)#tft.fill(0)while True : tft.jpg('/sd/1.jpg',0,0) time.sleep(1) tft.png('/sd/1.PNG',0,0) time.sleep(1) tft.png('/sd/2.PNG',0,0) time.sleep(1) tft.png('/sd/3.PNG',0,0) time.sleep(1) tft.jpg('/sd/cat.jpg',0,0) time.sleep(1) tft.png('/sd/oran.png',0,0) time.sleep(1)5. Display Image Effects
The display effect of images:
The display effect of videos:
It was tested that the refresh rate of displaying JPG images is faster, while the refresh rate of displaying PNG is slower.
Finally, it is recommended not to buy a 240X280 display, generally only supporting 240X240 or 240X320. It is recommended to buy these two types of LCD.
01
Compiling MicroPython Firmware for OV2640 and Other Cameras
02
Compiling MicroPython Firmware for 16M Flash
03
Flashing MicroPython Firmware on ESP32-S3 and Lighting Up the LED