Initial split-up of G-code handlers by category

Marlin/src/gcode/feature/camera/M240.h

@@ -0,0 +1,53 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * M240: Trigger a camera by emulating a Canon RC-1
+ *       See http://www.doc-diy.net/photo/rc-1_hacked/
+ */
+void gcode_M240() {
+  #ifdef CHDK
+
+    OUT_WRITE(CHDK, HIGH);
+    chdkHigh = millis();
+    chdkActive = true;
+
+  #elif HAS_PHOTOGRAPH
+
+    const uint8_t NUM_PULSES = 16;
+    const float PULSE_LENGTH = 0.01524;
+    for (int i = 0; i < NUM_PULSES; i++) {
+      WRITE(PHOTOGRAPH_PIN, HIGH);
+      _delay_ms(PULSE_LENGTH);
+      WRITE(PHOTOGRAPH_PIN, LOW);
+      _delay_ms(PULSE_LENGTH);
+    }
+    delay(7.33);
+    for (int i = 0; i < NUM_PULSES; i++) {
+      WRITE(PHOTOGRAPH_PIN, HIGH);
+      _delay_ms(PULSE_LENGTH);
+      WRITE(PHOTOGRAPH_PIN, LOW);
+      _delay_ms(PULSE_LENGTH);
+    }
+
+  #endif
+}