HELP ME TO UNDERSTAND BETTER PLEASE .

[kebab03]

HELLO.
I THOUGHT IN ORDER TO SEND SOME DATA TO THE SHELD I NEED TO USE THE FUNCTION "WRITEDATA OR WRITECOMMAND"".BUT WHEN YOU CALL ANY FUNCTION LIKE "

void TFT_eSprite::drawPixel(int32_t x, int32_t y, uint32_t color)
{
// Range checking
if ((x < 0) || (y < 0) || !_created) return;

if (_bpp == 16)
{
if ((x >= _iwidth) || (y >= _iheight)) return;
color = (color >> 8) | (color << 8);
_img[x+y*_iwidth] = (uint16_t) color;
}
else if (_bpp == 8)
{
if ((x >= _iwidth) || (y >= _iheight)) return;
_img8[x+y*_iwidth] = (uint8_t)((color & 0xE000)>>8 | (color & 0x0700)>>6 | (color & 0x0018)>>3);
}
else // 1 bpp
{
if ((x >= _dwidth) || (y >= _dheight)) return;
if (_rotation == 1)
{
uint16_t tx = x;
x = _dwidth - y - 1;
y = tx;
}
else if (_rotation == 2)
{
x = _dwidth - x - 1;
y = _dheight - y - 1;
}
else if (_rotation == 3)
{
uint16_t tx = x;
x = y;
y = _dheight - tx - 1;
}

if (color) _img8[(x + y * _bitwidth)>>3] |=  (0x80 >> (x & 0x7));
else       _img8[(x + y * _bitwidth)>>3] &= ~(0x80 >> (x & 0x7));

}
}

YOU ARE NOT USING WRITEDATA !! THEN HOW IT IS POSSIBLE TO SEND THE MESSAGE ( "drawPixel") TO THE LCD ? PLEASE KINDLY EXPLAIN. THANK YOU IN ADVANCE.

[Bodmer]

That is a Sprite drawPixel function so it draws the pixel in the RAM buffer. Read more here.

[kebab03]

Sorry sir , I don't understand how you write data in the display if you don't use any pin to write the data in ram?

[kebab03]

I mean how do you transfer data from THE RAM of MCU into the display?

[Bodmer]

Use pushSprite(), see examples.

[Bodmer]

This example is a good place to start.

[kebab03]

Thank you for your time.