Add matrix scan code for reactive ligthing modes

keyboards/anne_pro/anne_pro.c

@@ -91,3 +91,45 @@ void keyboard_post_init_kb(void) {
 
     matrix_init_user();
 }
+
+/* Current state of the matrix */
+static matrix_row_t matrix_status[MATRIX_ROWS];
+/* Buffer for the keystate packet */
+static uint8_t keystate[12] = {9, 10, 7, 0};
+
+/* Update the reactive lighting on every keymatrix scan when lighting is enabled */
+void matrix_scan_kb(void) {
+    matrix_row_t matrix_row = 0;
+    matrix_row_t matrix_change = 0;
+
+    /* Determine if the matrix state has changed, and update the state */
+    for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
+        matrix_row = matrix_get_row(r);
+        matrix_change |= matrix_row ^ matrix_status[r];
+        matrix_status[r] = matrix_row;
+    }
+
+    /* If the leds are enabled and the state changed */
+    if (leds_enabled && matrix_change) {
+        /* Go through every scan position */
+        for (uint8_t r = 0; r < MATRIX_ROWS; r++) {
+            for (uint8_t c = 0; c < MATRIX_COLS; c++) {
+                int position = r * MATRIX_COLS + c;
+                int index = position / 8;
+                int bit = position % 8;
+
+                /* Update the keystate based on the state of the matrix */
+                if (matrix_status[r] & (1 << c)) {
+                    keystate[3 + index] |= (1 << bit);
+                } else {
+                    keystate[3 + index] &= ~(1 << bit);
+                }
+            }
+        }
+        /* Send the keystate to the LED controller */
+        uartStartSend(&UARTD3, 12, keystate);
+    }
+
+    /* Run matrix_scan_user code */
+    matrix_scan_user();
+}