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). */
};

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

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Modifications for using with Zephyr #34

Modifications for using with Zephyr #34

Uh oh!

mjs513 commented Aug 4, 2025

Uh oh!

CLAassistant commented Aug 4, 2025 •

edited

Loading

Uh oh!

github-actions bot commented Aug 4, 2025

Uh oh!

github-actions bot commented Aug 4, 2025

Uh oh!

pennam commented Aug 5, 2025

Uh oh!

mjs513 commented Aug 5, 2025 •

edited

Loading

Uh oh!

mjs513 commented Aug 5, 2025 •

edited

Loading

Uh oh!

pennam commented Aug 5, 2025 •

edited

Loading

Uh oh!

mjs513 commented Aug 5, 2025 •

edited

Loading

Uh oh!

Uh oh!

Modifications for using with Zephyr #34

Are you sure you want to change the base?

Modifications for using with Zephyr #34

Uh oh!

Conversation

mjs513 commented Aug 4, 2025

Uh oh!

CLAassistant commented Aug 4, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

github-actions bot commented Aug 4, 2025

Uh oh!

github-actions bot commented Aug 4, 2025

Uh oh!

pennam commented Aug 5, 2025

Uh oh!

mjs513 commented Aug 5, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

mjs513 commented Aug 5, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

pennam commented Aug 5, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

mjs513 commented Aug 5, 2025 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Uh oh!

CLAassistant commented Aug 4, 2025 •

edited

Loading

mjs513 commented Aug 5, 2025 •

edited

Loading

mjs513 commented Aug 5, 2025 •

edited

Loading

pennam commented Aug 5, 2025 •

edited

Loading

mjs513 commented Aug 5, 2025 •

edited

Loading