The LCD screen lights up the display screen as follows: 1. 1. View log ,(
MTK platform keyword is 'LCMAutoDetect ')Ensure that the LCD driver is loaded successfully. 1. 2, use the oscilloscope to view DVDD ,(
AVDD, VGH, VGL, VCOM)(Some interface screens have these voltages built in)
Whether the voltage value and power-on timing of each group meet the requirements of the specification.
If the voltage value is incorrect, check the hardware schematic diagram to analyze the voltage source. You can find hardware to assist in analysis. 1.
3. Use an oscilloscope to check whether the pull-up timing of the reset foot meets the requirements of the specification.
If it is not pulled up, you can check the hardware schematic diagram and make sure the GPIO configuration is correct.
If the pull-up timing is not correct, you can do the corresponding delay and repeated pull-up operations in the driver. 1.
4. Check the hardware schematic diagram to ensure that the GPIO configuration of the backlight enabling foot is correct. 1.
5. Use an oscilloscope to check whether there is a differential signal of the image, so far the LCD should be able to light up normally.