Archive for February 3rd, 2015
The alert reader will have noted that the Kenmore 158 UI twisted around to a new orientation atop its fancy holder, with the USB port now poking out from the right side:
That lets me position the whole affair to the right of the sewing machine, in what seems to be its natural position, without having the cable form a loop that would push it off the platform. It’s not entirely clear how we’ll keep a straight cable from pulling it off, but that’s in the nature of fine tuning.
Anyhow, rotating the LCD isn’t a big deal, because the Adafruit library does all the heavy lifting:
// LCD orientation: always landscape, 1=USB upper left / 3=USB lower right #define LCDROTATION 3 ... snippage ... tft.begin(); tft.setRotation(LCDROTATION); // landscape, 1=USB upper left / 3=USB lower right
Flipping the touch screen coordinates required just interchanging the “to” bounds of the
map() functions, with a conditional serving as institutional memory in the not-so-unlikely event I must undo this:
#if LCDROTATION == 1 p->x = map(t.y, TS_Min.y, TS_Max.y, 0, tft.width()); // rotate & scale to TFT boundaries p->y = map(t.x, TS_Min.x, TS_Max.x, tft.height(), 0); // ... USB port at upper left #elif LCDROTATION == 3 p->x = map(t.y, TS_Min.y, TS_Max.y, tft.width(), 0); // rotate & scale to TFT boundaries p->y = map(t.x, TS_Min.x, TS_Max.x, 0, tft.height()); // ... USB port at lower right #endif
And then It Just Worked.