adzialocha / it8951-video Goto Github PK

Hi! I've been playing with the usb based controlling using https://sr.ht/~martijnbraam/it8951/ C code as the basis. I wasn't able to get the current vcom value using this code. Have you successfully queried the vcom value? The USB programming pdf sheet had an example command:

unsigned char get_vcom_cmd[16] = {
  0xfe, // Customer command.
  0x00,
  0x00,
  0x00,
  0x00,
  0x00,
  0xa3,  // PMIC (Power Management Integrated Circuits) command.
  0x00,
  0x00,
  0x00,   // Do Set VCom? (0 – no, 1 – yes)
  0x00,
  0x00,
  0x00,
  0x00,
  0x00,
  0x00,
};

but it didn't describe the return shape or length in bytes.

As a reference, Waveshare has a GPIO based C code example.