From 968f04defbb137db94c5a8424e0af26723b1ba72 Mon Sep 17 00:00:00 2001
From: ellensp <530024+ellensp@users.noreply.github.com>
Date: Mon, 14 Nov 2022 21:35:24 +1300
Subject: [PATCH] =?UTF-8?q?=F0=9F=A9=B9=20Fix=202=20thermocouples=20(#2498?=
 =?UTF-8?q?2)?=
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Followup to #24898
---
 Marlin/src/module/temperature.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Marlin/src/module/temperature.cpp b/Marlin/src/module/temperature.cpp
index 37996a80ea..8742cf36df 100644
--- a/Marlin/src/module/temperature.cpp
+++ b/Marlin/src/module/temperature.cpp
@@ -3076,8 +3076,13 @@ void Temperature::disable_all_heaters() {
       // Needed to return the correct temp when this is called between readings
       static raw_adc_t max_tc_temp_previous[MAX_TC_COUNT] = { 0 };
       #define THERMO_TEMP(I) max_tc_temp_previous[I]
-      #define THERMO_SEL(A,B,C) (hindex > 1 ? (C) : hindex == 1 ? (B) : (A))
-      #define MAXTC_CS_WRITE(V) do{ switch (hindex) { case 1: WRITE(TEMP_1_CS_PIN, V); break; case 2: WRITE(TEMP_2_CS_PIN, V); break; default: WRITE(TEMP_0_CS_PIN, V); } }while(0)
+      #if MAX_TC_COUNT > 2
+        #define THERMO_SEL(A,B,C) (hindex > 1 ? (C) : hindex == 1 ? (B) : (A))
+        #define MAXTC_CS_WRITE(V) do{ switch (hindex) { case 1: WRITE(TEMP_1_CS_PIN, V); break; case 2: WRITE(TEMP_2_CS_PIN, V); break; default: WRITE(TEMP_0_CS_PIN, V); } }while(0)
+      #elif MAX_TC_COUNT > 1
+        #define THERMO_SEL(A,B,C) ( hindex == 1 ? (B) : (A))
+        #define MAXTC_CS_WRITE(V) do{ switch (hindex) { case 1: WRITE(TEMP_1_CS_PIN, V); break; default: WRITE(TEMP_0_CS_PIN, V); } }while(0)
+      #endif
     #else
       // When we have only 1 max tc, THERMO_SEL will pick the appropriate sensor
       // variable, and MAXTC_*() macros will be hardcoded to the correct CS pin.