i have similar round LCD screen but still fail to bring it up. The Linux MIPI DSI driver will never work for the ST7701?? I tried modify panel-raydium-rm67191.c and add in these command sequence. No errors but still cannot get good image. Maybe my timing also out. May I know the timing (hfp, hbp, hsync, vfp, vbp, vsync) you are using?
On Monday, 4 May 2020 at 01:09:41 UTC+8 corey...@gmail.com wrote: > All, sorry for my slow response - I've just seen the comments on the > GitHub issue and will mirror my findings there. > > I always get the same effect as described by the OP: every line is looking >> the same. I've got full control over the x-axis, however, and can even run >> animations. >> > > I'm happy to say that I've solved it. Or, rather, that I had a solution > provided to me. What you're describing (and your images) seem extremely > similar to some of the failure modes I was observing, and I likewise found > next to nothing online about this. Plenty for the ST7701, which is > apparently just different enough. > > [image: camphoto_341603450.jpeg] > > [image: camphoto_959030623.jpeg] > > > The short answer is one that should frustrate you, especially if you were > using the same Sitronix data sheet that I was: *NOT ALL OF THE COMMANDS > ARE LISTED IN THE DATASHEET* > > I ended up emailing my contact at Shanghai TDO, and she shared with me the > init sequence that their engineers use: > > #if 1 //zheng shao > SPI_WriteComm(0xFF); > SPI_WriteData(0x77); > SPI_WriteData(0x01); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x10); > > SPI_WriteComm(0xC0); > SPI_WriteData(0x3B); > SPI_WriteData(0x00); > > SPI_WriteComm(0xC1); > SPI_WriteData(0x0B); //VBP > SPI_WriteData(0x02); > > SPI_WriteComm(0xC2); > SPI_WriteData(0x00); > SPI_WriteData(0x02); > > SPI_WriteComm(0xCC); > SPI_WriteData(0x10); > > SPI_WriteComm(0xCD); > SPI_WriteData(0x08); > > > > SPI_WriteComm ( 0xB0); //Positive Voltage Gamma Control > SPI_WriteData ( 0x02); > SPI_WriteData ( 0x13); > SPI_WriteData ( 0x1B); > SPI_WriteData ( 0x0D); > SPI_WriteData ( 0x10); > SPI_WriteData ( 0x05); > SPI_WriteData ( 0x08); > SPI_WriteData ( 0x07); > SPI_WriteData ( 0x07); > SPI_WriteData ( 0x24); > SPI_WriteData ( 0x04); > SPI_WriteData ( 0x11); > SPI_WriteData ( 0x0E); > SPI_WriteData ( 0x2C); > SPI_WriteData ( 0x33); > SPI_WriteData ( 0x1D); > > SPI_WriteComm ( 0xB1); //Negative Voltage Gamma Control > SPI_WriteData ( 0x05); > SPI_WriteData ( 0x13); > SPI_WriteData ( 0x1B); > SPI_WriteData ( 0x0D); > SPI_WriteData ( 0x11); > SPI_WriteData ( 0x05); > SPI_WriteData ( 0x08); > SPI_WriteData ( 0x07); > SPI_WriteData ( 0x07); > SPI_WriteData ( 0x24); > SPI_WriteData ( 0x04); > SPI_WriteData ( 0x11); > SPI_WriteData ( 0x0E); > SPI_WriteData ( 0x2C); > SPI_WriteData ( 0x33); > SPI_WriteData ( 0x1D); > > SPI_WriteComm(0xFF); > SPI_WriteData(0x77); > SPI_WriteData(0x01); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x11); > > SPI_WriteComm(0xB0); > SPI_WriteData(0x5d);//5d > > SPI_WriteComm(0xB1); //VCOM amplitude setting > SPI_WriteData(0x43); //43 > > SPI_WriteComm(0xB2); //VGH Voltage setting > SPI_WriteData(0x81); //12V > > SPI_WriteComm(0xB3); > SPI_WriteData(0x80); > > SPI_WriteComm(0xB5); //VGL Voltage setting > SPI_WriteData(0x43); //-8.3V > > SPI_WriteComm(0xB7); > SPI_WriteData(0x85); > > SPI_WriteComm(0xB8); > SPI_WriteData(0x20); > > SPI_WriteComm(0xC1); > SPI_WriteData(0x78); > > SPI_WriteComm(0xC2); > SPI_WriteData(0x78); > > SPI_WriteComm(0xD0); > SPI_WriteData(0x88); > > SPI_WriteComm(0xE0); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x02); > > SPI_WriteComm(0xE1); > SPI_WriteData(0x03); > SPI_WriteData(0xA0); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x04); > SPI_WriteData(0xA0); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x20); > SPI_WriteData(0x20); > > SPI_WriteComm(0xE2); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > > SPI_WriteComm(0xE3); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x11); > SPI_WriteData(0x00); > > SPI_WriteComm(0xE4); > SPI_WriteData(0x22); > SPI_WriteData(0x00); > > SPI_WriteComm(0xE5); > SPI_WriteData(0x05); > SPI_WriteData(0xEC); > SPI_WriteData(0xA0); > SPI_WriteData(0xA0); > SPI_WriteData(0x07); > SPI_WriteData(0xEE); > SPI_WriteData(0xA0); > SPI_WriteData(0xA0); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > > SPI_WriteComm(0xE6); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x11); > SPI_WriteData(0x00); > > SPI_WriteComm(0xE7); > SPI_WriteData(0x22); > SPI_WriteData(0x00); > > SPI_WriteComm(0xE8); > SPI_WriteData(0x06); > SPI_WriteData(0xED); > SPI_WriteData(0xA0); > SPI_WriteData(0xA0); > SPI_WriteData(0x08); > SPI_WriteData(0xEF); > SPI_WriteData(0xA0); > SPI_WriteData(0xA0); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > > SPI_WriteComm(0xEB); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x40); > SPI_WriteData(0x40); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > > SPI_WriteComm(0xED); > SPI_WriteData(0xFF); > SPI_WriteData(0xFF); > SPI_WriteData(0xFF); > SPI_WriteData(0xBA); > SPI_WriteData(0x0A); > SPI_WriteData(0xBF); > SPI_WriteData(0x45); > SPI_WriteData(0xFF); > SPI_WriteData(0xFF); > SPI_WriteData(0x54); > SPI_WriteData(0xFB); > SPI_WriteData(0xA0); > SPI_WriteData(0xAB); > SPI_WriteData(0xFF); > SPI_WriteData(0xFF); > SPI_WriteData(0xFF); > > SPI_WriteComm(0xEF); > SPI_WriteData(0x10); > SPI_WriteData(0x0D); > SPI_WriteData(0x04); > SPI_WriteData(0x08); > SPI_WriteData(0x3F); > SPI_WriteData(0x1F); > > SPI_WriteComm(0xFF); > SPI_WriteData(0x77); > SPI_WriteData(0x01); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x13); > > SPI_WriteComm(0xEF); > SPI_WriteData(0x08); > > SPI_WriteComm(0xFF); > SPI_WriteData(0x77); > SPI_WriteData(0x01); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > SPI_WriteData(0x00); > > #if 0 > WriteComm (0xFF); > WriteData (0x77); > WriteData (0x01); > WriteData (0x00); > WriteData (0x00); > WriteData (0x12); > WriteComm (0xD1); > WriteData (0x81); > WriteData (0x08); > WriteData (0x03); > WriteData (0x20); > WriteData (0x08); > WriteData (0x01); > WriteData (0xA0); > WriteData (0x01); > WriteData (0xE0); > WriteData (0xA0); > WriteData (0x01); > WriteData (0xE0); > WriteData (0x03); > WriteData (0x20); > WriteComm (0xD2); > WriteData (0x08); > #endif > /////////////////Bring up the internal test > picture/////////////////////////////////// > > > SPI_WriteComm(0x11); > > Delay(120); > > SPI_WriteComm(0x29); > > SPI_WriteComm(0x36); > SPI_WriteData(0x00); > > SPI_WriteComm(0x3A); > SPI_WriteData(0x60);//0x60 18bit 0x50 16bit > #endif > > You can see my version of it here: > https://github.com/ironblock/ST7701S-SPI-Driver/blob/master/src/sequence_tdo.rs > > I translated the commands that I was able to look up, but there's a HUGE > block of them that are nowhere in the docs, so I just sent them blind: > https://github.com/ironblock/ST7701S-SPI-Driver/blob/master/src/sequence_tdo.rs#L75-L139 > > So ultimately, I have no idea what's in those commands that could be so > critical to a ST7701S display working that it wouldn't be in the datasheet > for the chip, but evidently the "unscramble display and make it actually > work" command is somewhere in there. > > Please let me know if you try this, and let me know if it works for you. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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