Waveshare 7.3in 7color E-Paper: 7.3inch_e-Paper
ESP32 Waveshare Driver Board: Waveshare Driver Board
Hello, currently attempting to display images from a bitmap .h file to a Waveshare 7.3in 7color E-Paper and running into a bit of distortion. For clarity, I decided to create a simple image that contains the word "Hello World" to understand the distortion, here are the images of what I am seeing:
Here is the original image uploaded for reference:
It looks like from the pictures above, vertical slivers from the screen are inverted across the y axis (looking at the W in "World" above)
Here is the piece of code that draws the image onto the display :
void drawBitmaps()
{
display.setRotation(0);
display.setFullWindow();
#if defined(_OldSargeBmp_H_)
drawOldSargeBmp();
#endif
}
#if defined(_OldSargeBmp_H_)
void drawOldSargeBmp()
{
if ((display.epd2.panel == GxEPD2::GDEY073D46) || (display.epd2.panel == GxEPD2::ACeP730))
{
display.epd2.drawImage(OldSarge, 0, 0, 800, 480, false, false, false);
delay(5000);
}
}
#endif
I have a bitmap file that I am importing with the "OldSarge" bitmap defined referenced from the display.epd2.drawImage function call that I cannot show here because it is too many characters for this post. If possible, I would like to receive a bitmap to test as a sanity check (the display size is 800X480) This would be greatly appreciated. (Wish I could attach a file but I am new)
My question is if I am using this function correctly, I am using this driver for this display:
#define GxEPD2_DRIVER_CLASS GxEPD2_730c_ACeP_730 // Waveshare 7.3" 7-color
Within the driver code, this is the function that I am calling ("drawImage"):
void GxEPD2_730c_ACeP_730::drawImage(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
writeImage(bitmap, x, y, w, h, invert, mirror_y, pgm);
refresh(x, y, w, h);
}
void GxEPD2_730c_ACeP_730::writeImage(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
//Serial.print("writeImage("); Serial.print(x); Serial.print(", "); Serial.print(y); Serial.print(", ");
//Serial.print(w); Serial.print(", "); Serial.print(h); Serial.println(")");
delay(1); // yield() to avoid WDT on ESP8266 and ESP32
if (!_init_display_done) _InitDisplay();
if (_paged && (x == 0) && (w == int16_t(WIDTH)) && (h < int16_t(HEIGHT)))
{
//Serial.println("paged");
_startTransfer();
for (uint32_t i = 0; i < uint32_t(WIDTH) * uint32_t(h) / 8; i++)
{
uint8_t data = bitmap[i];
for (int16_t k = 0; k < 4; k++)
{
uint8_t data2 = (data & 0x80 ? 0x10 : 0x00) | (data & 0x40 ? 0x01 : 0x00);
data <<= 2;
_transfer(data2);
}
}
_endTransfer();
if (y + h == HEIGHT) // last page
{
//Serial.println("paged ended");
_paged = false;
}
}
else
{
_paged = false;
int16_t wb = (w + 7) / 8; // width bytes, bitmaps are padded
x -= x % 8; // byte boundary
w = wb * 8; // byte boundary
if ((w <= 0) || (h <= 0)) return;
_writeCommand(0x10);
_startTransfer();
for (int16_t i = 0; i < int16_t(HEIGHT); i++)
{
for (int16_t j = 0; j < int16_t(WIDTH); j += 8)
{
uint8_t data = 0xFF;
if ((j >= x) && (j <= x + w) && (i >= y) && (i < y + h))
{
uint32_t idx = mirror_y ? (j - x) / 8 + uint32_t((h - 1 - (i - y))) * wb : (j - x) / 8 + uint32_t(i - y) * wb;
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
data = pgm_read_byte(&bitmap[idx]);
#else
data = bitmap[idx];
#endif
}
else
{
data = bitmap[idx];
}
if (invert) data = ~data;
}
for (int16_t k = 0; k < 4; k++)
{
uint8_t data2 = (data & 0x80 ? 0x10 : 0x00) | (data & 0x40 ? 0x01 : 0x00);
data <<= 2;
_transfer(data2);
}
}
}
_endTransfer();
}
delay(1); // yield() to avoid WDT on ESP8266 and ESP32
}
