Electronics4you
Member
Hi there,
Has anyone tried to interface a 4-wire SPI interface graphical LCD? The display is of the +2.5-3.3 V type, so I use a voltage divider from my +5 V PIC18F4620 to lower the voltage on SCK and SDO. I initialize the display as shown in the datasheet https://www.electro-tech-online.com/custompdfs/2011/06/dogs102-6e.pdf on page 6, but the display doesn't react - no pixels light up. Chip select is always LOW and reset is HIGH.
Is there a fast test I can do to see, if the display is interfaced correctly with the PIC? I have used a scope to see the SDO/SCK signals, and they are find (charging/discharging curves of around 2.6-3.0 V when using a 3.0 V power supply).
Has anyone tried to interface a 4-wire SPI interface graphical LCD? The display is of the +2.5-3.3 V type, so I use a voltage divider from my +5 V PIC18F4620 to lower the voltage on SCK and SDO. I initialize the display as shown in the datasheet https://www.electro-tech-online.com/custompdfs/2011/06/dogs102-6e.pdf on page 6, but the display doesn't react - no pixels light up. Chip select is always LOW and reset is HIGH.
Is there a fast test I can do to see, if the display is interfaced correctly with the PIC? I have used a scope to see the SDO/SCK signals, and they are find (charging/discharging curves of around 2.6-3.0 V when using a 3.0 V power supply).