From a4c9ac9ae8afe30d8a483dc93369d7a8e5a0d743 Mon Sep 17 00:00:00 2001
From: Pablo Martikian <pablomartikian@hotmail.com>
Date: Thu, 5 Jan 2023 12:08:05 -0300
Subject: [PATCH] fix for warning - GPIO output gpio_num error - robustness
 other hardware

---
 TFT_eSPI.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/TFT_eSPI.cpp b/TFT_eSPI.cpp
index 282ed1b..256cde5 100644
--- a/TFT_eSPI.cpp
+++ b/TFT_eSPI.cpp
@@ -541,8 +541,10 @@ void TFT_eSPI::initBus(void) {
 
 // Configure chip select for touchscreen controller if present
 #ifdef TOUCH_CS
-  pinMode(TOUCH_CS, OUTPUT);
-  digitalWrite(TOUCH_CS, HIGH); // Chip select high (inactive)
+  if (TOUCH_CS >= 0) {
+    pinMode(TOUCH_CS, OUTPUT);
+    digitalWrite(TOUCH_CS, HIGH); // Chip select high (inactive)
+  }
 #endif
 
 // In parallel mode and with the RP2040 processor, the TFT_WR line is handled in the  PIO