#78 gdew0102I4FC partials

martinberlin · Jan 11, 2023 · b0a728c · b0a728c
1 parent f4361d7
commit b0a728c
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Showing 3 changed files with 117 additions and 3 deletions.
diff --git a/components/CalEPD/include/small/gdew0102I4FC.h b/components/CalEPD/include/small/gdew0102I4FC.h
@@ -36,6 +36,7 @@ class Gdew0102I4FC : public Epd
 
     void fillScreen(uint16_t color);
     void update();
+    void updateWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, bool using_rotation = true);
 
   private:
     EpdSpi& IO;
@@ -45,7 +46,28 @@ class Gdew0102I4FC : public Epd
     bool _initial = true;
 
     void _wakeUp();
+    void _wakeUpPart();
     void _sleep();
     void _waitBusy(const char* message);
     void _rotate(uint16_t& x, uint16_t& y, uint16_t& w, uint16_t& h);
+    void _setPartialRamArea(uint16_t x, uint16_t y, uint16_t xe, uint16_t ye);
+
+    uint8_t lut_w_partial[42] =   {
+      0x60, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x80, 0x0f, 0x00, 0x00, 0x00, 0x01,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    };
+    uint8_t lut_b_partial[42] =   {
+      0x90, 0x01, 0x01, 0x00, 0x00, 0x01,
+      0x40, 0x0f, 0x00, 0x00, 0x00, 0x01,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    };
 };
diff --git a/components/CalEPD/models/small/gdew0102I4FC.cpp b/components/CalEPD/models/small/gdew0102I4FC.cpp
@@ -49,6 +49,29 @@ void Gdew0102I4FC::_wakeUp(){
   IO.data(0x97);  
 }
 
+void Gdew0102I4FC::_wakeUpPart(){
+  _using_partial_mode = true;
+  IO.reset(10);
+
+  IO.cmd(0x00);  // Panel setting
+  IO.data(0x6F); // LUT from Registers
+
+  IO.cmd(0x30);  // PLL
+  IO.data(0x05); // 15Hz
+  IO.cmd(0x50);  // VCOM and Data interval setting
+  IO.data(0xF2); // DDX 11 : differential, VBD 11 : vcom, CDI 2 : 5 hsync
+  IO.cmd(0x82);  // Vcom DC Setting
+  IO.data(0x00);    // -0.1 V
+
+  IO.cmd(0x23);
+  IO.data(lut_w_partial, sizeof(lut_w_partial));
+  IO.cmd(0x24);
+  IO.data(lut_b_partial, sizeof(lut_b_partial));
+
+  IO.cmd(0x04);  //Power on
+  _waitBusy("epd_wakeup");; //waiting for the electronic paper IC to release the idle signal
+}
+
 void Gdew0102I4FC::_waitBusy(const char* message){
   if (debug_enabled) {
     ESP_LOGI(TAG, "_waitBusy for %s", message);
@@ -186,3 +209,67 @@ void Gdew0102I4FC::fillScreen(uint16_t color)
 
   if (debug_enabled) printf("fillScreen(%x) black len:%d\n", fill, sizeof(_black_buffer));
 }
+
+void Gdew0102I4FC::_setPartialRamArea(uint16_t x, uint16_t y, uint16_t xe, uint16_t ye)
+{
+  uint16_t w = (x + xe - 1) | 0x0007; // byte boundary inclusive (last byte)
+  uint16_t h = y + ye - 1;
+  x &= 0xFFF8;
+  IO.cmd(0x90); // partial window
+  IO.data(x);
+  IO.data(w);
+  IO.data(y);
+  IO.data(h);
+  IO.data(0x00);
+}
+
+void Gdew0102I4FC::updateWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, bool using_rotation) {
+  //printf("updateWindow is still not implemented\n");
+  if (!_using_partial_mode) {
+    _wakeUpPart();
+  }
+  int16_t w1 = x < 0 ? w + x : w;
+  int16_t h1 = y < 0 ? h + y : h;
+  int16_t x1 = x < 0 ? 0 : x;
+  int16_t y1 = y < 0 ? 0 : y;
+  w1 = x1 + w1 < int16_t(GDEW0102I4FC_WIDTH) ? w1 : int16_t(GDEW0102I4FC_WIDTH) - x1;
+  h1 = y1 + h1 < int16_t(GDEW0102I4FC_HEIGHT) ? h1 : int16_t(GDEW0102I4FC_HEIGHT) - y1;
+  if (using_rotation) _rotate(x, y, w, h);
+  if (x >= GDEW0102I4FC_WIDTH) {
+    ESP_LOGE(TAG, "Given width exceeds display");
+    return;
+  }
+  if (y >= GDEW0102I4FC_HEIGHT) {
+    ESP_LOGE(TAG, "Given height exceeds display");
+    return;
+  }
+  uint16_t xe = gx_uint16_min(GDEW0102I4FC_WIDTH, x + w) - 1;
+  uint16_t ye = gx_uint16_min(GDEW0102I4FC_HEIGHT, y + h) - 1;
+  uint16_t xs_bx = x / 8;
+  uint16_t xe_bx = (xe + 7) / 8;
+
+  w1 += x1 % 8;
+  if (w1 % 8 > 0) w1 += 8 - w1 % 8;
+  x1 -= x1 % 8;
+
+  // This command makes the display enter partial mode
+  IO.cmd(0x91); // partial in
+  // Here it sets where in RAM is going to write it
+  _setPartialRamArea(x1, y1, w1, h1);
+
+  // New data
+  IO.cmd(0x13);
+  for (int16_t y1 = y; y1 <= ye+1; y1++)
+  {
+    for (int16_t x1 = xs_bx; x1 < xe_bx; x1++)
+    {
+      uint16_t idx = y1 * (GDEW0102I4FC_WIDTH/ 8) + x1;
+      uint8_t data = (idx < sizeof(_black_buffer)) ? _black_buffer[idx] : 0x00; // white is 0x00 in buffer
+      IO.data(data); // white is 0xFF on device
+    }
+  }
+
+  IO.cmd(0x12); // Refresh
+  _waitBusy("partial");
+  IO.cmd(0x92); // Partial out
+}
diff --git a/main/demos/small/small-display.cpp b/main/demos/small/small-display.cpp
@@ -71,11 +71,16 @@ void app_main(void)
    // Test Epd class
    display.init(false);
    display.setFont(&Ubuntu_M12pt8b);
-   display.fillCircle(30,display.height()/2,30,EPD_BLACK);
+   /* display.fillCircle(display.width()/2,display.height()/2,30,EPD_BLACK);
    display.update();
-   delay(1000);
+   delay(1000); */
    display.fillScreen(EPD_WHITE);
-   //return; // Just clean display and draw a circle
+   uint8_t radius = 20;
+   display.fillCircle(display.width()/2,display.height()/2,radius,EPD_BLACK);
+   display.updateWindow(display.width()/2-radius,display.height()/2-radius,radius*2,radius*2);
+   printf("Partial update test\n");
+   delay(2000);
+   return; // Just clean display and draw a circle
 
    display.setRotation(0);
    draw_content(display.getRotation());