Hi
i have got the CFAF320240F lcd with SSD2119 driver. It is working on SPI 4 wire now but i have some questions:
1. In data sheet http://www.crystalfontz.com/controllers/SSD2119.pdf on page 81 we have got "15.5 Mapping for Writing Pixel Data in SPI mode" And it is 18 bit color (3 SPI frames x 6 bit's in frame)
But if i transfer data like - (R R R R R R x x), (G G G G G G x x), (B B B B B B x x) i get different color ! I see in example code that in spi we have got only 16 bit color ? what is the mapping (RRRRRGGG),(GGGBBBBB)? can i swith on the 18 bit mode?
2. Is it possibile to send a picture on the lcd and "freze" (for 500 ms) the LCD display until i send the new picture to GRAM? And when new data will be sent i only update the display.
3. Did someone tested the lcd with SPI CLK > 15 MHz. STM32 spi works up to 18 Mhz
4. I don't know how to say that but i think the pixels on LCD are small and there is a black space between them. The quality of display is poor Can i adjust it in config registers?
5. Is it posible to read the GRAM in SPI mode? how ?
thank you very much
i have got the CFAF320240F lcd with SSD2119 driver. It is working on SPI 4 wire now but i have some questions:
1. In data sheet http://www.crystalfontz.com/controllers/SSD2119.pdf on page 81 we have got "15.5 Mapping for Writing Pixel Data in SPI mode" And it is 18 bit color (3 SPI frames x 6 bit's in frame)
But if i transfer data like - (R R R R R R x x), (G G G G G G x x), (B B B B B B x x) i get different color ! I see in example code that in spi we have got only 16 bit color ? what is the mapping (RRRRRGGG),(GGGBBBBB)? can i swith on the 18 bit mode?
2. Is it possibile to send a picture on the lcd and "freze" (for 500 ms) the LCD display until i send the new picture to GRAM? And when new data will be sent i only update the display.
3. Did someone tested the lcd with SPI CLK > 15 MHz. STM32 spi works up to 18 Mhz
4. I don't know how to say that but i think the pixels on LCD are small and there is a black space between them. The quality of display is poor Can i adjust it in config registers?
5. Is it posible to read the GRAM in SPI mode? how ?
thank you very much
Looking for additional LCD resources? Check out our LCD blog for the latest developments in LCD technology.