initial snake commit, implemented led matrix and snake movements

snake/Makefile

@@ -0,0 +1,12 @@
+compile:
+	arduino-cli compile -b arduino:renesas_uno:unor4wifi snake.ino
+
+upload:
+	arduino-cli upload -b arduino:renesas_uno:unor4wifi -p /dev/ttyACM0
+
+upload_verbose:
+	arduino-cli upload -b arduino:renesas_uno:unor4wifi -p /dev/ttyACM0 -v
+
+run:
+	make compile
+	make upload

snake/snake.ino

@@ -0,0 +1,91 @@
+#include "Arduino_LED_Matrix.h"
+
+// create LED matrix object
+ArduinoLEDMatrix matrix;
+
+// initial snake frame
+byte frame[8][12] = {
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+  { 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
+  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
+};
+
+const uint32_t game_over[] = {
+  0x20410809,
+  0x600600,
+  0x90108204,
+};
+
+// snake initial coordinates
+int snake_x[4]= {4, 3, 2, 1};
+int snake_y[4]= {3, 3, 3, 3};
+int snake_len= 4;
+// direction 1 right, 2 bottom, 3 left, 4 top
+int direction= 1;
+
+// apple initial position
+//int apple_x= 9;
+//int apple_y= 4;
+
+void setup() {
+  Serial.begin(115200);
+  // stard LED matrix
+  matrix.begin();
+}
+
+void move_snake() {
+  /*
+    starting from head, save curr position w and h
+    then for all the snake length the previuos
+    body block needs to take the previous block place
+    the current tail pos will be set to 0
+  */
+
+  int i=0;
+  frame[snake_y[snake_len-1]][snake_x[snake_len-1]]= 0;
+  // move and render the snake tail
+  for (i= snake_len-1; i > 0; i--) {
+    frame[snake_y[i-1]][snake_x[i-1]]= 1;
+    snake_x[i]= snake_x[i-1];
+    snake_y[i]= snake_y[i-1];
+  }
+
+  //move the snake head
+
+  //snake_y[0]= snake_y[0];
+  // go right
+  if (direction == 1) {
+    snake_x[0]+= 1;
+    if (snake_x[0] > 11) snake_x[0]= 0;
+  }
+  // go down
+  else if (direction == 2) {
+    snake_y[0]+= 1;
+    if (snake_y[0] > 7) snake_y[0]= 0;
+  }
+  // go left
+  else if (direction == 3) {
+    snake_x[0]-= 1;
+    if (snake_x[0] < 0) snake_x[0]= 11;
+  }
+  // go up
+  else if (direction == 4) {
+    snake_y[0]-= 1;
+    if (snake_y[0] < 0) snake_y[0]= 7;
+  }
+
+  // render the snake head
+  frame[snake_y[0]][snake_x[0]]= 1;
+}
+
+void loop() {
+  matrix.renderBitmap(frame, 8, 12);
+  delay(300);
+  move_snake();
+  direction= 2;
+}