Modifications for using with Zephyr #34

mjs513 · 2025-08-04T11:36:30Z

Modifications made so can be used with the GigaDisplay whether using Zephyr or mbed.

The changes made for zephyr imply that Arduino_h7_portenta is no longer needed to run the display and gfx as well as the camera - does not support UVC.

In addition as mentioned here

certain sketches will not work in the GigaDisplay library since they have not been implemented in the core:

lvgl - not implemented

display camera - although I can modify that one to just use the GC2145. Multiple cameras are no longer supported > like they were in mbed

microphone - not implemented yet

Not sure if everyone prefers if they are deleted or just left as place holders?

@KurtE and I have been using the library since we created it.

Readme will probably have to be updated at some point. Would consider this first release

CLAassistant · 2025-08-04T11:36:38Z

All committers have signed the CLA.

github-actions · 2025-08-04T11:50:59Z

Memory usage change @ af959eb

Board	flash	%	RAM for global variables	%
`arduino:mbed_giga:giga`	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
`arduino:mbed_portenta:envie_m7`	N/A	N/A	N/A	N/A

Click for full report table

Board	`examples/backlight/SimpleBacklight` flash	%	`examples/backlight/SimpleBacklight` RAM for global variables	%	`examples/basic/ArduinoLogoDrawing` flash	%	`examples/basic/ArduinoLogoDrawing` RAM for global variables	%	`examples/basic/SimpleText` flash	%	`examples/basic/SimpleText` RAM for global variables	%	`examples/camera/display_camera` flash	%	`examples/camera/display_camera` RAM for global variables	%	`examples/gfx/geometrical-shapes` flash	%	`examples/gfx/geometrical-shapes` RAM for global variables	%	`examples/gfx/hello-world` flash	%	`examples/gfx/hello-world` RAM for global variables	%	`examples/gfx/touch-switch` flash	%	`examples/gfx/touch-switch` RAM for global variables	%	`examples/imu/accelerometer` flash	%	`examples/imu/accelerometer` RAM for global variables	%	`examples/imu/gyroscope` flash	%	`examples/imu/gyroscope` RAM for global variables	%	`examples/lvgl/bar_lvgl` flash	%	`examples/lvgl/bar_lvgl` RAM for global variables	%	`examples/lvgl/button_lvgl` flash	%	`examples/lvgl/button_lvgl` RAM for global variables	%	`examples/lvgl/check_radio_lvgl` flash	%	`examples/lvgl/check_radio_lvgl` RAM for global variables	%	`examples/lvgl/image_lvgl` flash	%	`examples/lvgl/image_lvgl` RAM for global variables	%	`examples/lvgl/imu_orientation` flash	%	`examples/lvgl/imu_orientation` RAM for global variables	%	`examples/lvgl/slider_lvgl` flash	%	`examples/lvgl/slider_lvgl` RAM for global variables	%	`examples/microphone/PDMSerialPlotter` flash	%	`examples/microphone/PDMSerialPlotter` RAM for global variables	%	`examples/rgb/SimpleRGB` flash	%	`examples/rgb/SimpleRGB` RAM for global variables	%	`examples/rgb/blink` flash	%	`examples/rgb/blink` RAM for global variables	%
`arduino:mbed_giga:giga`	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
`arduino:mbed_portenta:envie_m7`	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Click for full report CSV

Board,examples/backlight/SimpleBacklight<br>flash,%,examples/backlight/SimpleBacklight<br>RAM for global variables,%,examples/basic/ArduinoLogoDrawing<br>flash,%,examples/basic/ArduinoLogoDrawing<br>RAM for global variables,%,examples/basic/SimpleText<br>flash,%,examples/basic/SimpleText<br>RAM for global variables,%,examples/camera/display_camera<br>flash,%,examples/camera/display_camera<br>RAM for global variables,%,examples/gfx/geometrical-shapes<br>flash,%,examples/gfx/geometrical-shapes<br>RAM for global variables,%,examples/gfx/hello-world<br>flash,%,examples/gfx/hello-world<br>RAM for global variables,%,examples/gfx/touch-switch<br>flash,%,examples/gfx/touch-switch<br>RAM for global variables,%,examples/imu/accelerometer<br>flash,%,examples/imu/accelerometer<br>RAM for global variables,%,examples/imu/gyroscope<br>flash,%,examples/imu/gyroscope<br>RAM for global variables,%,examples/lvgl/bar_lvgl<br>flash,%,examples/lvgl/bar_lvgl<br>RAM for global variables,%,examples/lvgl/button_lvgl<br>flash,%,examples/lvgl/button_lvgl<br>RAM for global variables,%,examples/lvgl/check_radio_lvgl<br>flash,%,examples/lvgl/check_radio_lvgl<br>RAM for global variables,%,examples/lvgl/image_lvgl<br>flash,%,examples/lvgl/image_lvgl<br>RAM for global variables,%,examples/lvgl/imu_orientation<br>flash,%,examples/lvgl/imu_orientation<br>RAM for global variables,%,examples/lvgl/slider_lvgl<br>flash,%,examples/lvgl/slider_lvgl<br>RAM for global variables,%,examples/microphone/PDMSerialPlotter<br>flash,%,examples/microphone/PDMSerialPlotter<br>RAM for global variables,%,examples/rgb/SimpleRGB<br>flash,%,examples/rgb/SimpleRGB<br>RAM for global variables,%,examples/rgb/blink<br>flash,%,examples/rgb/blink<br>RAM for global variables,%
arduino:mbed_giga:giga,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A

github-actions · 2025-08-04T13:20:13Z

Memory usage change @ e05eb4e

Board	flash	%	RAM for global variables	%
`arduino:mbed_giga:giga`	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
`arduino:mbed_portenta:envie_m7`	N/A	N/A	N/A	N/A

Click for full report table

Board	`examples/backlight/SimpleBacklight` flash	%	`examples/backlight/SimpleBacklight` RAM for global variables	%	`examples/basic/ArduinoLogoDrawing` flash	%	`examples/basic/ArduinoLogoDrawing` RAM for global variables	%	`examples/basic/SimpleText` flash	%	`examples/basic/SimpleText` RAM for global variables	%	`examples/camera/display_camera` flash	%	`examples/camera/display_camera` RAM for global variables	%	`examples/gfx/geometrical-shapes` flash	%	`examples/gfx/geometrical-shapes` RAM for global variables	%	`examples/gfx/hello-world` flash	%	`examples/gfx/hello-world` RAM for global variables	%	`examples/gfx/touch-switch` flash	%	`examples/gfx/touch-switch` RAM for global variables	%	`examples/imu/accelerometer` flash	%	`examples/imu/accelerometer` RAM for global variables	%	`examples/imu/gyroscope` flash	%	`examples/imu/gyroscope` RAM for global variables	%	`examples/lvgl/bar_lvgl` flash	%	`examples/lvgl/bar_lvgl` RAM for global variables	%	`examples/lvgl/button_lvgl` flash	%	`examples/lvgl/button_lvgl` RAM for global variables	%	`examples/lvgl/check_radio_lvgl` flash	%	`examples/lvgl/check_radio_lvgl` RAM for global variables	%	`examples/lvgl/image_lvgl` flash	%	`examples/lvgl/image_lvgl` RAM for global variables	%	`examples/lvgl/imu_orientation` flash	%	`examples/lvgl/imu_orientation` RAM for global variables	%	`examples/lvgl/slider_lvgl` flash	%	`examples/lvgl/slider_lvgl` RAM for global variables	%	`examples/microphone/PDMSerialPlotter` flash	%	`examples/microphone/PDMSerialPlotter` RAM for global variables	%	`examples/rgb/SimpleRGB` flash	%	`examples/rgb/SimpleRGB` RAM for global variables	%	`examples/rgb/blink` flash	%	`examples/rgb/blink` RAM for global variables	%
`arduino:mbed_giga:giga`	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
`arduino:mbed_portenta:envie_m7`	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Click for full report CSV

Board,examples/backlight/SimpleBacklight<br>flash,%,examples/backlight/SimpleBacklight<br>RAM for global variables,%,examples/basic/ArduinoLogoDrawing<br>flash,%,examples/basic/ArduinoLogoDrawing<br>RAM for global variables,%,examples/basic/SimpleText<br>flash,%,examples/basic/SimpleText<br>RAM for global variables,%,examples/camera/display_camera<br>flash,%,examples/camera/display_camera<br>RAM for global variables,%,examples/gfx/geometrical-shapes<br>flash,%,examples/gfx/geometrical-shapes<br>RAM for global variables,%,examples/gfx/hello-world<br>flash,%,examples/gfx/hello-world<br>RAM for global variables,%,examples/gfx/touch-switch<br>flash,%,examples/gfx/touch-switch<br>RAM for global variables,%,examples/imu/accelerometer<br>flash,%,examples/imu/accelerometer<br>RAM for global variables,%,examples/imu/gyroscope<br>flash,%,examples/imu/gyroscope<br>RAM for global variables,%,examples/lvgl/bar_lvgl<br>flash,%,examples/lvgl/bar_lvgl<br>RAM for global variables,%,examples/lvgl/button_lvgl<br>flash,%,examples/lvgl/button_lvgl<br>RAM for global variables,%,examples/lvgl/check_radio_lvgl<br>flash,%,examples/lvgl/check_radio_lvgl<br>RAM for global variables,%,examples/lvgl/image_lvgl<br>flash,%,examples/lvgl/image_lvgl<br>RAM for global variables,%,examples/lvgl/imu_orientation<br>flash,%,examples/lvgl/imu_orientation<br>RAM for global variables,%,examples/lvgl/slider_lvgl<br>flash,%,examples/lvgl/slider_lvgl<br>RAM for global variables,%,examples/microphone/PDMSerialPlotter<br>flash,%,examples/microphone/PDMSerialPlotter<br>RAM for global variables,%,examples/rgb/SimpleRGB<br>flash,%,examples/rgb/SimpleRGB<br>RAM for global variables,%,examples/rgb/blink<br>flash,%,examples/rgb/blink<br>RAM for global variables,%
arduino:mbed_giga:giga,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A

pennam · 2025-08-05T12:08:28Z

@mjs513 I was testing this PR with the 0.3.2 core pre-release and found out that display_set_pixel_format is failing. Seems to me that in not an API of the display driver

mjs513 · 2025-08-05T12:25:02Z

@pennam

Yeah - unfortunately they are not using the st7701 display driver. They are using this driver.

When I first started this had the same concern then found that it was different. What sketch are you trying to run?

Mike

Update:
You might want to read through the whole thread : arduino/ArduinoCore-zephyr#92 since it kind of mentions this issue at the begining of the issue and where I found its not using the expected driver.

PS as a reminder arduino_H7_video does not work currently with zephyr

mjs513 · 2025-08-05T12:27:20Z

Here is a good example that should work:

#include "Arduino_GigaDisplay_GFX.h"

GigaDisplay_GFX tft;

unsigned long testFillScreen();
unsigned long testText();
unsigned long testLines(uint16_t color);
unsigned long testFastLines(uint16_t color1, uint16_t color2);
unsigned long testRects(uint16_t color);
unsigned long testFilledRects(uint16_t color1, uint16_t color2);
unsigned long testFilledCircles(uint8_t radius, uint16_t color);
unsigned long testCircles(uint8_t radius, uint16_t color);
unsigned long testTriangles();
unsigned long testFilledTriangles();
unsigned long testRoundRects();
unsigned long testFilledRoundRects();


void setup() {
  while(!Serial && millis()< 5000){}
  Serial.begin(9600);
  Serial.println("Zephyr Giga Display Test!");

  tft.begin();

  Serial.println(F("Benchmark                Time (microseconds)"));
  delay(10);
  Serial.print(F("Screen fill              "));
  Serial.println(testFillScreen());
  delay(500);

  Serial.print(F("Text                     "));
  Serial.println(testText());
  delay(3000);

  Serial.print(F("Lines                    "));
  Serial.println(testLines(RGB565_CYAN));
  delay(500);

  Serial.print(F("Horiz/Vert Lines         "));
  Serial.println(testFastLines(RGB565_RED, RGB565_BLUE));
  delay(500);

  Serial.print(F("Rectangles (outline)     "));
  Serial.println(testRects(RGB565_GREEN));
  delay(500);

  Serial.print(F("Rectangles (filled)      "));
  Serial.println(testFilledRects(RGB565_YELLOW, RGB565_MAGENTA));
  delay(500);

  Serial.print(F("Circles (filled)         "));
  Serial.println(testFilledCircles(10, RGB565_MAGENTA));

  Serial.print(F("Circles (outline)        "));
  Serial.println(testCircles(10, RGB565_WHITE));
  delay(500);

  Serial.print(F("Triangles (outline)      "));
  Serial.println(testTriangles());
  delay(500);

  Serial.print(F("Triangles (filled)       "));
  Serial.println(testFilledTriangles());
  delay(500);

  Serial.print(F("Rounded rects (outline)  "));
  Serial.println(testRoundRects());
  delay(500);

  Serial.print(F("Rounded rects (filled)   "));
  Serial.println(testFilledRoundRects());
  delay(500);

  Serial.println(F("Done!"));
}

void loop(void) {
  for (uint8_t rotation = 0; rotation < 4; rotation++) {
    tft.setRotation(rotation);
    testText();
    delay(1000);
  }
}

unsigned long testFillScreen() {
  unsigned long start = micros();
  tft.fillScreen(RGB565_BLACK);
  yield();
  tft.fillScreen(RGB565_RED);
  yield();
  tft.fillScreen(RGB565_GREEN);
  yield();
  tft.fillScreen(RGB565_BLUE);
  yield();
  tft.fillScreen(RGB565_BLACK);
  yield();
  return micros() - start;
}

unsigned long testText() {
  tft.fillScreen(RGB565_BLACK);
  unsigned long start = micros();
  tft.setCursor(0, 0);
  tft.startBuffering();
  tft.setTextColor(RGB565_WHITE);  tft.setTextSize(1);
  tft.println("Hello World!");
  tft.setTextColor(RGB565_YELLOW); tft.setTextSize(2);
  tft.println(1234.56);
  tft.setTextColor(RGB565_RED);    tft.setTextSize(3);
  tft.println(0xDEADBEEF, HEX);
  tft.println();
  tft.setTextColor(RGB565_GREEN);
  tft.setTextSize(5);
  tft.println("Groop");
  tft.setTextSize(2);
  tft.println("I implore thee,");
  tft.setTextSize(1);
  tft.println("my foonting turlingdromes.");
  tft.println("And hooptiously drangle me");
  tft.println("with crinkly bindlewurdles,");
  tft.println("Or I will rend thee");
  tft.println("in the gobberwarts");
  tft.println("with my blurglecruncheon,");
  tft.println("see if I don't!");
  tft.endBuffering();
  return micros() - start;
}

unsigned long testLines(uint16_t color) {
  unsigned long start, t;
  int           x1, y1, x2, y2,
                w = tft.width(),
                h = tft.height();

  tft.fillScreen(RGB565_BLACK);
  yield();

  x1 = y1 = 0;
  y2    = h - 1;
  start = micros();
  tft.startBuffering();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.endBuffering();

  x2    = w - 1;
  tft.startBuffering();
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.endBuffering();
  t     = micros() - start; // fillScreen doesn't count against timing
  yield();
  tft.fillScreen(RGB565_BLACK);


  yield();

  x1    = w - 1;
  y1    = 0;
  y2    = h - 1;
  start = micros();
  tft.startBuffering();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.endBuffering();
  x2    = 0;
  tft.startBuffering();
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  t    += micros() - start;
  tft.endBuffering();

  yield();
  tft.fillScreen(RGB565_BLACK);
  yield();

  x1    = 0;
  y1    = h - 1;
  y2    = 0;
  start = micros();
  tft.startBuffering();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.endBuffering();
  x2    = w - 1;
  tft.startBuffering();
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.endBuffering();
  t    += micros() - start;

  yield();
  tft.fillScreen(RGB565_BLACK);
  yield();

  x1    = w - 1;
  y1    = h - 1;
  y2    = 0;
  start = micros();
  tft.startBuffering();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.startBuffering();
  x2    = 0;
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  tft.endBuffering();
  yield();
  return micros() - start;
}

unsigned long testFastLines(uint16_t color1, uint16_t color2) {
  unsigned long start;
  int           x, y, w = tft.width(), h = tft.height();

  tft.fillScreen(RGB565_BLACK);
  start = micros();
  tft.startBuffering();
  for (y = 0; y < h; y += 5) tft.drawFastHLine(0, y, w, color1);
  for (x = 0; x < w; x += 5) tft.drawFastVLine(x, 0, h, color2);
  tft.endBuffering();
  return micros() - start;
}

unsigned long testRects(uint16_t color) {
  unsigned long start;
  int           n, i, i2,
                cx = tft.width()  / 2,
                cy = tft.height() / 2;

  tft.fillScreen(RGB565_BLACK);
  n     = min(tft.width(), tft.height());
  start = micros();
  tft.startBuffering();
  for (i = 2; i < n; i += 6) {
    i2 = i / 2;
    tft.drawRect(cx - i2, cy - i2, i, i, color);
  }
  tft.endBuffering();

  return micros() - start;
}

unsigned long testFilledRects(uint16_t color1, uint16_t color2) {
  unsigned long start, t = 0;
  int           n, i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(RGB565_BLACK);
  n = min(tft.width(), tft.height());
  tft.startBuffering();
  for (i = n; i > 0; i -= 6) {
    i2    = i / 2;
    start = micros();
    tft.fillRect(cx - i2, cy - i2, i, i, color1);
    t    += micros() - start;
    // Outlines are not included in timing results
    tft.drawRect(cx - i2, cy - i2, i, i, color2);
    yield();
  }
  tft.endBuffering();

  return t;
}

unsigned long testFilledCircles(uint8_t radius, uint16_t color) {
  unsigned long start;
  int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2;

  tft.fillScreen(RGB565_BLACK);
  start = micros();
  tft.startBuffering();
  for (x = radius; x < w; x += r2) {
    for (y = radius; y < h; y += r2) {
      tft.fillCircle(x, y, radius, color);
    }
  }
  tft.endBuffering();

  return micros() - start;
}

unsigned long testCircles(uint8_t radius, uint16_t color) {
  unsigned long start;
  int           x, y, r2 = radius * 2,
                      w = tft.width()  + radius,
                      h = tft.height() + radius;

  // Screen is not cleared for this one -- this is
  // intentional and does not affect the reported time.
  start = micros();
  tft.startBuffering();
  for (x = 0; x < w; x += r2) {
    for (y = 0; y < h; y += r2) {
      tft.drawCircle(x, y, radius, color);
    }
  }
  tft.endBuffering();
  return micros() - start;
}

unsigned long testTriangles() {
  unsigned long start;
  int           n, i, cx = tft.width()  / 2 - 1,
                      cy = tft.height() / 2 - 1;

  tft.fillScreen(RGB565_BLACK);
  n     = min(cx, cy);
  start = micros();
  tft.startBuffering();
  for (i = 0; i < n; i += 5) {
    tft.drawTriangle(
      cx    , cy - i, // peak
      cx - i, cy + i, // bottom left
      cx + i, cy + i, // bottom right
      tft.color565(i, i, i));
  }
  tft.endBuffering();

  return micros() - start;
}

unsigned long testFilledTriangles() {
  unsigned long start, t = 0;
  int           i, cx = tft.width()  / 2 - 1,
                   cy = tft.height() / 2 - 1;

  tft.fillScreen(RGB565_BLACK);
  start = micros();
  tft.startBuffering();
  for (i = min(cx, cy); i > 10; i -= 5) {
    start = micros();
    tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
                     tft.color565(0, i * 10, i * 10));
    t += micros() - start;
    tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
                     tft.color565(i * 10, i * 10, 0));
    yield();
  }
  tft.endBuffering();
  return t;
}

unsigned long testRoundRects() {
  unsigned long start;
  int           w, i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(RGB565_BLACK);
  w     = min(tft.width(), tft.height());
  start = micros();
  tft.startBuffering();
  for (i = 0; i < w; i += 6) {
    i2 = i / 2;
    tft.drawRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(i, 0, 0));
  }
  tft.endBuffering();
  return micros() - start;
}

unsigned long testFilledRoundRects() {
  unsigned long start;
  int           i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(RGB565_BLACK);
  start = micros();
  tft.startBuffering();
  for (i = min(tft.width(), tft.height()); i > 20; i -= 6) {
    i2 = i / 2;
    tft.fillRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(0, i, 0));
    yield();
  }
  tft.endBuffering();

  return micros() - start;
}

Sorry in the middle of something else .. havent synched up with the pre-release version yet. Probably later today.

pennam · 2025-08-05T13:22:21Z

Thanks for the info, i may have fount the issue, now (zephyr release 4.2) the driver is using PIXEL_FORMAT_BGR_565 to set LTDC_PIXEL_FORMAT_RGB565

zephyrproject-rtos/zephyr#92483

https://github.com/zephyrproject-rtos/zephyr/blob/772fbfe9ccec546644993019d713e82d2969ddf4/drivers/display/display_stm32_ltdc.c#L113

mjs513 · 2025-08-05T13:33:13Z

Thanks for the info, i may have fount the issue, now the driver is using PIXEL_FORMAT_BGR_565 to set LTDC_PIXEL_FORMAT_RGB565

Ok thats a change - thanks for the update. Right now in the gigsdisplay.h file I have:

bool begin(DisplayPixelFormat pixformat = DISPLAY_RGB565);

and this so it may still work:

enum DisplayPixelFormat {
    DISPLAY_RGB565,    /**< RGB565 format (16-bit). */
    DISPLAY_RGB888    /**< RGB888 format (16-bit). */
};

Fixes issue with struct display_buffer_descriptor *buf_desc; never being allocated - see arduino/ArduinoCore-zephyr#274 (comment)

github-actions · 2025-11-20T16:34:19Z

Memory usage change @ 23a01e1

Board	flash	%	RAM for global variables	%
`arduino:mbed_giga:giga`	0 - 0	0.0 - 0.0	0 - 0	0.0 - 0.0
`arduino:mbed_portenta:envie_m7`	N/A	N/A	N/A	N/A

Click for full report table

Board	`examples/backlight/SimpleBacklight` flash	%	`examples/backlight/SimpleBacklight` RAM for global variables	%	`examples/basic/ArduinoLogoDrawing` flash	%	`examples/basic/ArduinoLogoDrawing` RAM for global variables	%	`examples/basic/SimpleText` flash	%	`examples/basic/SimpleText` RAM for global variables	%	`examples/camera/display_camera` flash	%	`examples/camera/display_camera` RAM for global variables	%	`examples/gfx/geometrical-shapes` flash	%	`examples/gfx/geometrical-shapes` RAM for global variables	%	`examples/gfx/hello-world` flash	%	`examples/gfx/hello-world` RAM for global variables	%	`examples/gfx/touch-switch` flash	%	`examples/gfx/touch-switch` RAM for global variables	%	`examples/imu/accelerometer` flash	%	`examples/imu/accelerometer` RAM for global variables	%	`examples/imu/gyroscope` flash	%	`examples/imu/gyroscope` RAM for global variables	%	`examples/lvgl/bar_lvgl` flash	%	`examples/lvgl/bar_lvgl` RAM for global variables	%	`examples/lvgl/button_lvgl` flash	%	`examples/lvgl/button_lvgl` RAM for global variables	%	`examples/lvgl/check_radio_lvgl` flash	%	`examples/lvgl/check_radio_lvgl` RAM for global variables	%	`examples/lvgl/image_lvgl` flash	%	`examples/lvgl/image_lvgl` RAM for global variables	%	`examples/lvgl/imu_orientation` flash	%	`examples/lvgl/imu_orientation` RAM for global variables	%	`examples/lvgl/slider_lvgl` flash	%	`examples/lvgl/slider_lvgl` RAM for global variables	%	`examples/microphone/PDMSerialPlotter` flash	%	`examples/microphone/PDMSerialPlotter` RAM for global variables	%	`examples/rgb/SimpleRGB` flash	%	`examples/rgb/SimpleRGB` RAM for global variables	%	`examples/rgb/blink` flash	%	`examples/rgb/blink` RAM for global variables	%
`arduino:mbed_giga:giga`	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
`arduino:mbed_portenta:envie_m7`	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A

Click for full report CSV

Board,examples/backlight/SimpleBacklight<br>flash,%,examples/backlight/SimpleBacklight<br>RAM for global variables,%,examples/basic/ArduinoLogoDrawing<br>flash,%,examples/basic/ArduinoLogoDrawing<br>RAM for global variables,%,examples/basic/SimpleText<br>flash,%,examples/basic/SimpleText<br>RAM for global variables,%,examples/camera/display_camera<br>flash,%,examples/camera/display_camera<br>RAM for global variables,%,examples/gfx/geometrical-shapes<br>flash,%,examples/gfx/geometrical-shapes<br>RAM for global variables,%,examples/gfx/hello-world<br>flash,%,examples/gfx/hello-world<br>RAM for global variables,%,examples/gfx/touch-switch<br>flash,%,examples/gfx/touch-switch<br>RAM for global variables,%,examples/imu/accelerometer<br>flash,%,examples/imu/accelerometer<br>RAM for global variables,%,examples/imu/gyroscope<br>flash,%,examples/imu/gyroscope<br>RAM for global variables,%,examples/lvgl/bar_lvgl<br>flash,%,examples/lvgl/bar_lvgl<br>RAM for global variables,%,examples/lvgl/button_lvgl<br>flash,%,examples/lvgl/button_lvgl<br>RAM for global variables,%,examples/lvgl/check_radio_lvgl<br>flash,%,examples/lvgl/check_radio_lvgl<br>RAM for global variables,%,examples/lvgl/image_lvgl<br>flash,%,examples/lvgl/image_lvgl<br>RAM for global variables,%,examples/lvgl/imu_orientation<br>flash,%,examples/lvgl/imu_orientation<br>RAM for global variables,%,examples/lvgl/slider_lvgl<br>flash,%,examples/lvgl/slider_lvgl<br>RAM for global variables,%,examples/microphone/PDMSerialPlotter<br>flash,%,examples/microphone/PDMSerialPlotter<br>RAM for global variables,%,examples/rgb/SimpleRGB<br>flash,%,examples/rgb/SimpleRGB<br>RAM for global variables,%,examples/rgb/blink<br>flash,%,examples/rgb/blink<br>RAM for global variables,%
arduino:mbed_giga:giga,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A

mjs513 added 7 commits June 4, 2025 10:01

Ifdef on Mbed for intensity

a6aa1d1

fix - endif mbed wrong place

3ad5f7e

zephyr display driver

61a6ef0

Getting ArduinoGraphics support

e2183be

testing lvgl

ab54e0f

update

ae9ef1e

update so gfx works

af959eb

Spell check fixes

e05eb4e

per1234 added type: enhancement Proposed improvement topic: code Related to content of the project itself labels Aug 29, 2025

mjs513 mentioned this pull request Nov 19, 2025

GIGIA: Giga display graphics no longer work with the release of 0.52.0 arduino/ArduinoCore-zephyr#274

Open

Fixed Struct never being allocated

23a01e1

Fixes issue with struct display_buffer_descriptor *buf_desc; never being allocated - see arduino/ArduinoCore-zephyr#274 (comment)

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