I have an LG132643-DW-P1 graphic display from China (Yuxian, Laurellcd Store) that came with a 12-conductor FFC connector for SPI only. The controller is the Siltronics ST7567. The ST7565 is similar.
The specific chip I am using is the 16F1829 with Assembly. The SPI for that device does not allow a read, so it is send only. My problem is that regardless of the mode I use (0,1,2,3) a trial print to screen does nothing.
My question is whether anyone here has experience with either of those controllers in SPI mode? As you know, contrast is handled by code from the MCU and I have tried a range of contrasts from lowest to highest (i.e., 0..63 decimal). I can't rule out a defective screen. Two replacements are on order from mid-January via AliExpress. They presumably shipped January 20th by expedited e-packet, so the new year celebrations should not affect them, but they have not been received yet.
The specific chip I am using is the 16F1829 with Assembly. The SPI for that device does not allow a read, so it is send only. My problem is that regardless of the mode I use (0,1,2,3) a trial print to screen does nothing.
My question is whether anyone here has experience with either of those controllers in SPI mode? As you know, contrast is handled by code from the MCU and I have tried a range of contrasts from lowest to highest (i.e., 0..63 decimal). I can't rule out a defective screen. Two replacements are on order from mid-January via AliExpress. They presumably shipped January 20th by expedited e-packet, so the new year celebrations should not affect them, but they have not been received yet.