Question about `fillLCD`

Pokitto Programming
1

For some reason I can’t get fillLCD to work.

What is fillLCD's argument supposed to be?
Is it a palette index?
Is it an RGB565 colour?

2

Don’t quote me but I’m pretty sure it’s bool for direct fill or screen buffer fill.

It fills with current color

3

The argument is supposed to be of type uint16_t, so if it’s being used as a sort of “0 for buffer, 1 for screen”, and there are no other options planned, then that’s really counter-intuitive.

4

That is a 16-bit color value.

Here it is written to LCD:

void Pokitto::lcdFillSurface(uint16_t c) {
    uint32_t i;
    write_command(0x20);  // Horizontal DRAM Address
    write_data(0x0000);  // 0
    write_command(0x21);  // Vertical DRAM Address
    write_data(0);
    write_command(0x22); // write data to DRAM
    setup_data_16(c);
    CLR_CS_SET_CD_RD_WR;
    for(i=0;i<220*176;i++)
    {
    CLR_WR;
    SET_WR;
    }
}
2 Likes
5

I also now realise there’s a fillScreen function, which is the version that writes to the buffer, while the fillLCD function is the one that writes directly to the screen.

I got a bit confused because they don’t follow the naming scheme of the other ‘direct’ functions (and I didn’t read the comments properly).