M42 for hotend and heat bed pins

Hi, I'm using Marlin 2.0.5.4 for controlling a PNP machine (Mega2560+ RAMPS 1.4). I could really use the MOSFET outputs (usually assigned for hotend and heat bed) to control solenoids and vacuum pumps. I know that D8, D9 and D10 are protected pins. Can anyone please let me know how to remove these from the protected pins? Till now, I've tried deleting them from the #define SENSITIVE_PINS block in sensitive_pins.h file but that did not work. I also tried defining the heater and heat bed pins as -1 but then the firmware would not compile. I've also tried M42 P8 I1 S255 and that momentarily switches on the MOSFET and then switches it off again.

In a any recent version of marlin simply define

#define RAMPS_D8_PIN -1
#define RAMPS_D9_PIN -1
#define RAMPS_D10_PIN -1

In your Configuration.h

then marlin will not use those pins and they are unprotected

Once they are unprotected you can use M42 P8 S255

Quote
Dust
In a any recent version of marlin simply define

#define RAMPS_D8_PIN -1
#define RAMPS_D9_PIN -1
#define RAMPS_D10_PIN -1

In your Configuration.h

then marlin will not use those pins and they are unprotected

Once they are unprotected you can use M42 P8 S255

Didn't work! Got this error message:

In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:40:0,
                 from Marlin\src\HAL\AVR\HAL_SPI.cpp:34:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1553:4: error: #error "HEATER_0_PIN not defined for this board."
   #error "HEATER_0_PIN not defined for this board."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:40:0,
                 from Marlin\src\HAL\AVR\HAL.cpp:25:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1553:4: error: #error "HEATER_0_PIN not defined for this board."
   #error "HEATER_0_PIN not defined for this board."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:40:0,
                 from Marlin\src\HAL\AVR\MarlinSerial.cpp:39:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1553:4: error: #error "HEATER_0_PIN not defined for this board."
   #error "HEATER_0_PIN not defined for this board."
    ^
In file included from Marlin\src\HAL\AVR\../../inc/MarlinConfig.h:40:0,
                 from Marlin\src\HAL\AVR\Servo.cpp:56:
Marlin\src\HAL\AVR\../../inc/SanityCheck.h:1553:4: error: #error "HEATER_0_PIN not defined for this board."
   #error "HEATER_0_PIN not defined for this board."
    ^
*** [.pio\build\mega2560\src\src\HAL\AVR\HAL_SPI.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\AVR\HAL.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\AVR\MarlinSerial.cpp.o] Error 1
*** [.pio\build\mega2560\src\src\HAL\AVR\Servo.cpp.o] Error 1
================================================================================================== [FAILED] Took 13.61 seconds ==================================================================================================

that is because its a 3d printer firmware it expects there to be heater pins... (going to submit a PR so that this test is skipped if EXTRUDERS < 1)

Just disable that SanityCheck

find #error "HEATER_0_PIN not defined for this board." in SanityCheck.h and disable it by prefixing it with //

should be line 1553 for you

Thanks. It indeed was 1553 but it still does not compile. This is the error I see now,

In file included from Marlin/src/module/thermistor/../../inc/../HAL/./AVR/HAL.h:23:0,
                 from Marlin/src/module/thermistor/../../inc/../HAL/HAL.h:26,
                 from Marlin/src/module/thermistor/../../inc/MarlinConfig.h:30,
                 from Marlin/src/module/thermistor/thermistors.h:24,
                 from Marlin/src/module/temperature.h:28,
                 from Marlin/src/module/temperature.cpp:27:
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:76:41: error: pasting "DIO" and "-" does not give a valid preprocessing token
 #define _WRITE(IO,V)          do{ if (&(DIO ## IO ## _RPORT) < (uint8_t*)0x100) _WRITE_NC(IO,V); else _WRITE_C(IO,V); }while(0)
                                         ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:96:31: note: in expansion of macro '_WRITE'
 #define WRITE(IO,V)           _WRITE(IO,V)
                               ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1666:28: note: in expansion of macro 'WRITE'
 #define WRITE_HEATER_0P(v) WRITE(HEATER_0_PIN, (v) ^ HEATER_0_INVERTING)
                            ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1691:29: note: in expansion of macro 'WRITE_HEATER_0P'
   #define WRITE_HEATER_0(v) WRITE_HEATER_0P(v)
                             ^
Marlin/src/module/temperature.cpp:2101:5: note: in expansion of macro 'WRITE_HEATER_0'
     WRITE_HEATER_##N(LOW);              \
     ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:459:3: note: in expansion of macro 'DISABLE_HEATER'
   _RPT_OP(_RPT_I)                                             \
   ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:474:38: note: in expansion of macro '_REPEAT'
 #define REPEAT_S(S,N,OP)        EVAL(_REPEAT(S,SUB##S(N),OP))
                                      ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:475:33: note: in expansion of macro 'REPEAT_S'
 #define REPEAT(N,OP)            REPEAT_S(0,N,OP)
                                 ^
Marlin/src/module/temperature.cpp:2105:5: note: in expansion of macro 'REPEAT'
     REPEAT(HOTENDS, DISABLE_HEATER);
     ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:66:14: error: pasting "DIO" and "-" does not give a valid preprocessing token
   if (V) SBI(DIO ## IO ## _WPORT, DIO ## IO ## _PIN); \
              ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:76:81: note: in expansion of macro '_WRITE_NC'
 #define _WRITE(IO,V)          do{ if (&(DIO ## IO ## _RPORT) < (uint8_t*)0x100) _WRITE_NC(IO,V); else _WRITE_C(IO,V); }while(0)
                                                                                 ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:96:31: note: in expansion of macro '_WRITE'
 #define WRITE(IO,V)           _WRITE(IO,V)
                               ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1666:28: note: in expansion of macro 'WRITE'
 #define WRITE_HEATER_0P(v) WRITE(HEATER_0_PIN, (v) ^ HEATER_0_INVERTING)
                            ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1691:29: note: in expansion of macro 'WRITE_HEATER_0P'
   #define WRITE_HEATER_0(v) WRITE_HEATER_0P(v)
                             ^
Marlin/src/module/temperature.cpp:2101:5: note: in expansion of macro 'WRITE_HEATER_0'
     WRITE_HEATER_##N(LOW);              \
     ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:459:3: note: in expansion of macro 'DISABLE_HEATER'
   _RPT_OP(_RPT_I)                                             \
   ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:474:38: note: in expansion of macro '_REPEAT'
 #define REPEAT_S(S,N,OP)        EVAL(_REPEAT(S,SUB##S(N),OP))
                                      ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:475:33: note: in expansion of macro 'REPEAT_S'
 #define REPEAT(N,OP)            REPEAT_S(0,N,OP)
                                 ^
Marlin/src/module/temperature.cpp:2105:5: note: in expansion of macro 'REPEAT'
     REPEAT(HOTENDS, DISABLE_HEATER);
     ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:66:35: error: pasting "DIO" and "-" does not give a valid preprocessing token
   if (V) SBI(DIO ## IO ## _WPORT, DIO ## IO ## _PIN); \
                                   ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:76:81: note: in expansion of macro '_WRITE_NC'
 #define _WRITE(IO,V)          do{ if (&(DIO ## IO ## _RPORT) < (uint8_t*)0x100) _WRITE_NC(IO,V); else _WRITE_C(IO,V); }while(0)
                                                                                 ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:96:31: note: in expansion of macro '_WRITE'
 #define WRITE(IO,V)           _WRITE(IO,V)
                               ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1666:28: note: in expansion of macro 'WRITE'
 #define WRITE_HEATER_0P(v) WRITE(HEATER_0_PIN, (v) ^ HEATER_0_INVERTING)
                            ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1691:29: note: in expansion of macro 'WRITE_HEATER_0P'
   #define WRITE_HEATER_0(v) WRITE_HEATER_0P(v)
                             ^
Marlin/src/module/temperature.cpp:2101:5: note: in expansion of macro 'WRITE_HEATER_0'
     WRITE_HEATER_##N(LOW);              \
     ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:459:3: note: in expansion of macro 'DISABLE_HEATER'
   _RPT_OP(_RPT_I)                                             \
   ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:474:38: note: in expansion of macro '_REPEAT'
 #define REPEAT_S(S,N,OP)        EVAL(_REPEAT(S,SUB##S(N),OP))
                                      ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:475:33: note: in expansion of macro 'REPEAT_S'
 #define REPEAT(N,OP)            REPEAT_S(0,N,OP)
                                 ^
Marlin/src/module/temperature.cpp:2105:5: note: in expansion of macro 'REPEAT'
     REPEAT(HOTENDS, DISABLE_HEATER);
     ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:67:14: error: pasting "DIO" and "-" does not give a valid preprocessing token
   else   CBI(DIO ## IO ## _WPORT, DIO ## IO ## _PIN); \
              ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:76:81: note: in expansion of macro '_WRITE_NC'
 #define _WRITE(IO,V)          do{ if (&(DIO ## IO ## _RPORT) < (uint8_t*)0x100) _WRITE_NC(IO,V); else _WRITE_C(IO,V); }while(0)
                                                                                 ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:96:31: note: in expansion of macro '_WRITE'
 #define WRITE(IO,V)           _WRITE(IO,V)
                               ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1666:28: note: in expansion of macro 'WRITE'
 #define WRITE_HEATER_0P(v) WRITE(HEATER_0_PIN, (v) ^ HEATER_0_INVERTING)
                            ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1691:29: note: in expansion of macro 'WRITE_HEATER_0P'
   #define WRITE_HEATER_0(v) WRITE_HEATER_0P(v)
                             ^
Marlin/src/module/temperature.cpp:2101:5: note: in expansion of macro 'WRITE_HEATER_0'
     WRITE_HEATER_##N(LOW);              \
     ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:459:3: note: in expansion of macro 'DISABLE_HEATER'
   _RPT_OP(_RPT_I)                                             \
   ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:474:38: note: in expansion of macro '_REPEAT'
 #define REPEAT_S(S,N,OP)        EVAL(_REPEAT(S,SUB##S(N),OP))
                                      ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:475:33: note: in expansion of macro 'REPEAT_S'
 #define REPEAT(N,OP)            REPEAT_S(0,N,OP)
                                 ^
Marlin/src/module/temperature.cpp:2105:5: note: in expansion of macro 'REPEAT'
     REPEAT(HOTENDS, DISABLE_HEATER);
     ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:67:35: error: pasting "DIO" and "-" does not give a valid preprocessing token
   else   CBI(DIO ## IO ## _WPORT, DIO ## IO ## _PIN); \
                                   ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:76:81: note: in expansion of macro '_WRITE_NC'
 #define _WRITE(IO,V)          do{ if (&(DIO ## IO ## _RPORT) < (uint8_t*)0x100) _WRITE_NC(IO,V); else _WRITE_C(IO,V); }while(0)
                                                                                 ^
Marlin/src/module/thermistor/../../inc/../HAL/./AVR/fastio.h:96:31: note: in expansion of macro '_WRITE'
 #define WRITE(IO,V)           _WRITE(IO,V)
                               ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1666:28: note: in expansion of macro 'WRITE'
 #define WRITE_HEATER_0P(v) WRITE(HEATER_0_PIN, (v) ^ HEATER_0_INVERTING)
                            ^
Marlin/src/module/thermistor/../../inc/Conditionals_post.h:1691:29: note: in expansion of macro 'WRITE_HEATER_0P'
   #define WRITE_HEATER_0(v) WRITE_HEATER_0P(v)
                             ^
Marlin/src/module/temperature.cpp:2101:5: note: in expansion of macro 'WRITE_HEATER_0'
     WRITE_HEATER_##N(LOW);              \
     ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:459:3: note: in expansion of macro 'DISABLE_HEATER'
   _RPT_OP(_RPT_I)                                             \
   ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:474:38: note: in expansion of macro '_REPEAT'
 #define REPEAT_S(S,N,OP)        EVAL(_REPEAT(S,SUB##S(N),OP))
                                      ^
Marlin/src/module/thermistor/../../inc/../core/macros.h:475:33: note: in expansion of macro 'REPEAT_S'
 #define REPEAT(N,OP)            REPEAT_S(0,N,OP)
                                 ^
Marlin/src/module/temperature.cpp:2105:5: note: in expansion of macro 'REPEAT'
     REPEAT(HOTENDS, DISABLE_HEATER);
     ^
compilation terminated due to -fmax-errors=5.
*** [.pio/build/mega2560/src/src/module/temperature.cpp.o] Error 1
=============================================================== [FAILED] Took 91.96 seconds ===============================================================

your reassigning the pins away from the hotend etc, you have to tell it you don't have any extruders

#define EXTRUDERS 0 in your configuration.h (is normally set to 1)

This worked! Thank you for all your support!

Another strange thing I noticed is that while D8, D9 and D10 were protected, I could still switch them ON using M42 P8 I1 S254 (not 255). If the S value was 255, the MOSFET would switch on momentarily and then switch off again within a fraction of second.

Edited 1 time(s). Last edit at 07/29/2020 06:07PM by electrophile.

Thats because the firmware was still controlling things, you set one thing the firmware immediately set something else.

Hallo RepRap-Freunde,
dank Eurer Hilfe konnte ich seit 2015 bis dato schöne Drucke mit meinem selbstgebauten Prusa i3 machen. Vielen Dank. Das muß auch mal sein.

Nun brauche ich aber wieder Eure Hilfe. Das Problem ist Folgendes:
In Repetier (Version 2.2.2, vorher 2.1.6) wird keine Temperatur mehr angezeigt für Heizbett + Extruder. Nur 0. Das Heizbett wird aber aufgeheizt. Ich kann nur die Temperatur nicht kontrollieren. Der Extruder heizt auch eine Weile, dann die Fehlermeldung: Sensor + Heizelement entkoppelt. Im Log steht noch: 12:46:25.902 : fatal:Heater/sensor error - Printer stopped and heaters disabled due to this error. Fix error and restart with M999.

Danach werden die Heizungen ausgeschaltet. Ich kann in der Config.h keine Änderungen feststellen. Ich hoffe, daß mir jemand weiterhelfen kann.

---

Hans

PRUSA i3, Diamond-Hotend + 3 Extruder, Arduino Mega 2560, Ramps 1.4, ATX PowerSupply 550W, Arduino 1.0, Repetier Host V2.2.2, Repetier Firmware, PCWindows10.