😎 different speeds for each line, use double buffer to avoid flickering

nametag/src/main.cpp

@@ -36,21 +36,10 @@
 
 MatrixPanel_I2S_DMA *matrix = nullptr;
 
-uint16_t colorWheel(uint8_t pos) {
-  if(pos < 85) {
-    return matrix->color565(pos * 3, 255 - pos * 3, 0);
-  } else if(pos < 170) {
-    pos -= 85;
-    return matrix->color565(255 - pos * 3, 0, pos * 3);
-  } else {
-    pos -= 170;
-    return matrix->color565(0, pos * 3, 255 - pos * 3);
-  }
-}
-
 int line_pos[PANEL_WIDTH]; // where a rain marker is (y coordinate) 
 int line_length[PANEL_WIDTH]; // how long a line is for a given x coord
 int line_speed[PANEL_WIDTH]; // how fast each line moves
+unsigned long line_last_moved[PANEL_WIDTH];
 
 void setup(){
   Serial.begin(BAUD_RATE);
@@ -58,8 +47,9 @@ void setup(){
 
   for (int i = 0; i<PANEL_WIDTH; i++) {
     line_pos[i] = 0 - random(24);
-    line_length[i] = random(12, 24);
-    line_speed[i] = random(10, 100);
+    line_length[i] = random(20, 28);
+    line_speed[i] = random(25, 100);
+    line_last_moved[i] = millis();
   }
   // redefine pins if required
   HUB75_I2S_CFG::i2s_pins _pins={R1, G1, BL1, R2, G2, BL2, CH_A, CH_B, CH_C, CH_D, CH_E, LAT, OE, CLK};
@@ -72,6 +62,8 @@ void setup(){
   mxconfig.i2sspeed = HUB75_I2S_CFG::HZ_10M;
   mxconfig.clkphase = false;
 
+  mxconfig.double_buff = true;
+
   matrix = new MatrixPanel_I2S_DMA(mxconfig);
   matrix->begin();
   matrix->setBrightness8(64);
@@ -79,15 +71,19 @@ void setup(){
   matrix->setFont(&CaveatBrush_Regular9pt7b);
 }
 
-uint8_t color = 0;
-const char *str = "Panki";
 void loop() {
 
-  matrix->fillScreenRGB888(0, 0, 0);
+  matrix ->flipDMABuffer();
+  matrix->clearScreen();
+  delay(25);
   //matrix ->drawBitmap(0, 0, overlay, 64, 32, matrix->color565(64, 0, 0));
+  unsigned long timestamp = millis();
   for (int x = 0; x < PANEL_WIDTH; x++) {
+    if ((timestamp - line_last_moved[x]) > line_speed[x]) {
       // step down a pixel
       line_pos[x]++;
+      line_last_moved[x] = timestamp;
+    }
     if (line_pos[x] > PANEL_HEIGHT) {
       line_pos[x] = 0;
     }
@@ -101,7 +97,6 @@ void loop() {
         //}
         int trail_y = line_pos[x] - trail_offset;
         if (trail_y >= 0) {
-          //if (overlay[ (trail_y * PANEL_WIDTH) + x ]) {
           int pixel_num = (trail_y * PANEL_WIDTH) + x;
           if (overlay[ pixel_num / 8 ] & (1 << (7 - (pixel_num % 8)) )) {
             matrix->drawPixel(x, trail_y, matrix->color565(128, 255, 128));
@@ -123,20 +118,6 @@ void loop() {
       }
     }
   }
-  delay(100);
-  //for (color=0; color<256; color++) {
-  //  // create a border
-  //  matrix->drawRect(0, 0, matrix->width(), matrix->height(), colorWheel(color));
-  //  matrix->drawRect(1, 1, matrix->width()-2, matrix->height()-2, colorWheel(color));
-
-  //  matrix->setTextSize(1);
-  //  matrix->setTextWrap(false);
-  //  matrix->setCursor(8, 22);
-
-  //  //const char *str = "Panki";
-  //  matrix->setTextColor(colorWheel(color+128));
-  //  matrix->print(str);
-  //  delay(100);
-  //}
+  //delay(25);
 }