From 97400e54b90a4fe40b60ea2f76e90cb14b0bf6ea Mon Sep 17 00:00:00 2001
From: ladismrkolj <ladismrkolj@gmail.com>
Date: Sun, 5 Dec 2021 22:41:39 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=94=A7=20Chamber=20Fan=20index=20option?=
=?UTF-8?q?=20(#23262)?=
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---
Marlin/Configuration_adv.h | 3 ++-
Marlin/src/inc/SanityCheck.h | 4 ++--
Marlin/src/inc/Warnings.cpp | 4 ++++
Marlin/src/module/temperature.cpp | 4 +++-
4 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index d4fcd510037..5f02d25cc48 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -186,7 +186,8 @@
//#define CHAMBER_FAN // Enable a fan on the chamber
#if ENABLED(CHAMBER_FAN)
- #define CHAMBER_FAN_MODE 2 // Fan control mode: 0=Static; 1=Linear increase when temp is higher than target; 2=V-shaped curve; 3=similar to 1 but fan is always on.
+ //#define CHAMBER_FAN_INDEX 2 // Index of a fan to repurpose as the chamber fan. (Default: first unused fan)
+ #define CHAMBER_FAN_MODE 2 // Fan control mode: 0=Static; 1=Linear increase when temp is higher than target; 2=V-shaped curve; 3=similar to 1 but fan is always on.
#if CHAMBER_FAN_MODE == 0
#define CHAMBER_FAN_BASE 255 // Chamber fan PWM (0-255)
#elif CHAMBER_FAN_MODE == 1
diff --git a/Marlin/src/inc/SanityCheck.h b/Marlin/src/inc/SanityCheck.h
index 39a154cb532..1442b9219fb 100644
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@@ -2270,8 +2270,8 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
#error "LASER_COOLANT_FLOW_METER requires FLOWMETER_PIN and LASER_FEATURE."
#endif
-#if ENABLED(CHAMBER_FAN) && !(defined(CHAMBER_FAN_MODE) && WITHIN(CHAMBER_FAN_MODE, 0, 2))
- #error "CHAMBER_FAN_MODE must be between 0 and 2."
+#if ENABLED(CHAMBER_FAN) && !(defined(CHAMBER_FAN_MODE) && WITHIN(CHAMBER_FAN_MODE, 0, 3))
+ #error "CHAMBER_FAN_MODE must be between 0 and 3."
#endif
#if ENABLED(CHAMBER_VENT)
diff --git a/Marlin/src/inc/Warnings.cpp b/Marlin/src/inc/Warnings.cpp
index 1976c095816..b7eef9c49f5 100644
--- a/Marlin/src/inc/Warnings.cpp
+++ b/Marlin/src/inc/Warnings.cpp
@@ -524,6 +524,10 @@
#endif
#endif
+#if ENABLED(CHAMBER_FAN) && !defined(CHAMBER_FAN_INDEX)
+ #warning "Auto-assigned CHAMBER_FAN_INDEX to the first free FAN pin."
+#endif
+
#if IS_LEGACY_TFT
#warning "Don't forget to update your TFT settings in Configuration.h."
#endif
diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index 9d6c8ae061b..9d6c566ba08 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -865,7 +865,9 @@ int16_t Temperature::getHeaterPower(const heater_id_t heater_id) {
#define INIT_CHAMBER_AUTO_FAN_PIN(P) SET_OUTPUT(P)
#endif
- #define CHAMBER_FAN_INDEX HOTENDS
+ #ifndef CHAMBER_FAN_INDEX
+ #define CHAMBER_FAN_INDEX HOTENDS
+ #endif
void Temperature::update_autofans() {
#define _EFAN(B,A) _EFANOVERLAP(A,B) ? B :