@HappyUser
Further research
Tried the default M5GFX Bargraph example (attached)
No display on M5Stick and M5COre2
Works perfect on M5StickCPlus and M5CoreS3
This is realy weird.
I hope someone can help
#include <arduino.h>
#include <M5GFX.h>
M5GFX display;
//#include <M5UnitOLED.h>
//M5UnitOLED display; // default setting
//M5UnitOLED display ( 21, 22, 400000 ); // SDA, SCL, FREQ
//#include <M5UnitLCD.h>
//M5UnitLCD display; // default setting
//M5UnitLCD display ( 21, 22, 400000 ); // SDA, SCL, FREQ
//#include <M5UnitGLASS2.h>
//M5UnitGLASS2 display; // default setting
//M5UnitGLASS2 display ( 21, 22, 400000 ); // SDA, SCL, FREQ
// #include <M5AtomDisplay.h>
// M5AtomDisplay display;
static constexpr size_t BAR_COUNT = 64;
static int max_y[BAR_COUNT];
static int prev_y[BAR_COUNT];
static uint32_t colors[BAR_COUNT];
void setup(void)
{
display.init();
display.startWrite();
display.fillScreen(TFT_BLACK);
if (display.isEPD())
{
display.setEpdMode(epd_mode_t::epd_fastest);
}
if (display.width() < display.height())
{
display.setRotation(display.getRotation() ^ 1);
}
for (int x = 0; x < BAR_COUNT; ++x)
{
prev_y[x] = display.height();
max_y[x] = display.height();
int r=0,g=0,b=0;
switch (x >> 4)
{
case 0:
b = 255;
g = x*0x11;
break;
case 1:
b = 255 - (x&15)*0x11;
g = 255;
break;
case 2:
g = 255;
r = (x&15)*0x11;
break;
case 3:
r = 255;
g = 255 - (x&15)*0x11;
break;
}
colors[x] = display.color888(r,g,b);
}
}
void loop(void)
{
int h = display.height();
static int i;
++i;
display.waitDisplay();
for (int x = 0; x < BAR_COUNT; ++x)
{
int y = (h>>1) - (sinf((float)((x-24)*i) / 3210.0f) + sinf((float)((x-40)*i) / 1234.0f)) * (h>>2);
int xpos = x * display.width() / BAR_COUNT;
int w = ((x+1) * display.width() / BAR_COUNT) - xpos - 1;
if (max_y[x]+1 >= y) { max_y[x] = y-1; }
else
{
if ((i & 3) ==0 )
{
display.fillRect(xpos, max_y[x]-3, w, 1, TFT_BLACK);
max_y[x]++;
}
}
display.fillRect(xpos, max_y[x]-3, w, 3, TFT_WHITE);
if (prev_y[x] < y)
{
display.fillRect(xpos, prev_y[x], w, y - prev_y[x], TFT_BLACK);
}
else
{
display.fillRect(xpos, y, w, prev_y[x] - y, colors[x]);
}
prev_y[x] = y;
}
display.display();
}
