Update and fix CHDK

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

@@ -22,20 +22,24 @@
 
 #include "../../../inc/MarlinConfig.h"
 
-#if defined(CHDK) || HAS_PHOTOGRAPH
+#if PIN_EXISTS(CHDK) || HAS_PHOTOGRAPH
 
 #include "../../gcode.h"
 
+bool chdk_active; // = false
+millis_t chdk_timeout;
+
 /**
  * M240: Trigger a camera by emulating a Canon RC-1
  *       See http://www.doc-diy.net/photo/rc-1_hacked/
  */
 void GcodeSuite::M240() {
-  #ifdef CHDK
 
-    OUT_WRITE(CHDK, HIGH);
-    chdkHigh = millis();
-    chdkActive = true;
+  #if PIN_EXISTS(CHDK)
+
+    OUT_WRITE(CHDK_PIN, HIGH);
+    chdk_timeout = millis() + CHDK_DELAY;
+    chdk_active = true;
 
   #elif HAS_PHOTOGRAPH
 
@@ -58,4 +62,4 @@ void GcodeSuite::M240() {
   #endif
 }
 
-#endif // CHDK || HAS_PHOTOGRAPH
+#endif // CHDK_PIN || HAS_PHOTOGRAPH

Marlin/src/gcode/gcode.cpp

@@ -522,7 +522,7 @@ void GcodeSuite::process_parsed_command(
         case 304: M304(); break;                                  // M304: Set bed PID parameters
       #endif
 
-      #if defined(CHDK) || HAS_PHOTOGRAPH
+      #if PIN_EXISTS(CHDK) || HAS_PHOTOGRAPH
         case 240: M240(); break;                                  // M240: Trigger a camera by emulating a Canon RC-1 : http://www.doc-diy.net/photo/rc-1_hacked/
       #endif
 

Marlin/src/gcode/gcode.h

@@ -171,7 +171,7 @@
  * M220 - Set Feedrate Percentage: "M220 S<percent>" (i.e., "FR" on the LCD)
  * M221 - Set Flow Percentage: "M221 S<percent>"
  * M226 - Wait until a pin is in a given state: "M226 P<pin> S<state>"
- * M240 - Trigger a camera to take a photograph. (Requires CHDK or PHOTOGRAPH_PIN)
+ * M240 - Trigger a camera to take a photograph. (Requires CHDK_PIN or PHOTOGRAPH_PIN)
  * M250 - Set LCD contrast: "M250 C<contrast>" (0-63). (Requires LCD support)
  * M260 - i2c Send Data (Requires EXPERIMENTAL_I2CBUS)
  * M261 - i2c Request Data (Requires EXPERIMENTAL_I2CBUS)
@@ -631,7 +631,7 @@ private:
   static void M221();
   static void M226();
 
-  #if defined(CHDK) || HAS_PHOTOGRAPH
+  #if PIN_EXISTS(CHDK) || HAS_PHOTOGRAPH
     static void M240();
   #endif