display big numbers

cepics

Hi All,
I'm using this sketch to display sensor value in four big number on M5 lcd...

can someone help me to do not display the first "0"?

es " 222" instead of "0222"
or " 35" instead of "0035"
0r " 9" instead of "0009"

thanks a lot

Rop

Ouch, that is ugly code. But if you absolutely must, replace this bit:

  M5.Lcd.pushRect(80*3,40,80,160,(uint16_t *)(_buf+ c0 * 80 * 160 * 2));
  M5.Lcd.pushRect(80*2,40,80,160,(uint16_t *)(_buf+ c1 * 80 * 160 * 2));
  M5.Lcd.pushRect(80*1,40,80,160,(uint16_t *)(_buf+ c2 * 80 * 160 * 2));
  M5.Lcd.pushRect(80*0,40,80,160,(uint16_t *)(_buf+ c3 * 80 * 160 * 2));

with

  M5.Lcd.pushRect(80*3,40,80,160,(uint16_t *)(_buf+ c0 * 80 * 160 * 2));
  if (count >= 10) M5.Lcd.pushRect(80*2,40,80,160,(uint16_t *)(_buf+ c1 * 80 * 160 * 2));
  if (count >= 100) M5.Lcd.pushRect(80*1,40,80,160,(uint16_t *)(_buf+ c2 * 80 * 160 * 2));
  if (count >= 1000) M5.Lcd.pushRect(80*0,40,80,160,(uint16_t *)(_buf+ c3 * 80 * 160 * 2));

Note that this code will leave 9 digits on the display if the counter wraps around, you might need to put M5.Lcd.clear(WHITE); in there if you want to prevent that, but I didn't do it because it will cause flicker.

Just out of curiosity: what are you trying to do here?

cepics

Hi, tanks a lot but since I'm displaying distance with an HC-SR04 your code doesn't work for me... because the sensor can "jump" from a distance with three digit to a distance with two digit (es from 125 cm to 80cm).... and , like you say, I can't use M5.Lcd.clear(WHITE); for flickering issue...
what I'm looking for is to "clear" only the rectangle where the digit "was"...

mumble mumble

thanks a lot anyway ...

heybin

hello, you can test

M5.Lcd.fillScreen(uint16_t color)

to replace clear

m5-docs

M5.Lcd.fillScreen(BLACK)