From 5bfad13b2e955e805f97a57eec405a77014d3d76 Mon Sep 17 00:00:00 2001
From: Pavel Horniak <35545900+Gouster4@users.noreply.github.com>
Date: Tue, 14 Oct 2025 20:51:11 +0200
Subject: [PATCH] Allow external pin definitions

Skip builtin pin definitions if they are already defined before including library.

Usefull for defining pins in sketch instead of modifiyng library.
Also usefull when linking library in submodule, and still needing define pins in project.
---
 Arduino-STM32-8bitTFT.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Arduino-STM32-8bitTFT.h b/Arduino-STM32-8bitTFT.h
index 394bcd4..97bf78f 100644
--- a/Arduino-STM32-8bitTFT.h
+++ b/Arduino-STM32-8bitTFT.h
@@ -66,6 +66,11 @@ Define pins and Output Data Registers
 #define PORT_LOW       0
 #define PORT_HIGH      1
 
+#if !defined(TFT_DATA) || !defined(TFT_D0) || !defined(TFT_D1) || \
+    !defined(TFT_D2) || !defined(TFT_D3) || !defined(TFT_D4) || \
+    !defined(TFT_D5) || !defined(TFT_D6) || !defined(TFT_D7) || \
+    !defined(TFT_PORT)
+
 #if 1
 #define TFT_DATA       GPIOA
 #define TFT_PORT       PORT_LOW
@@ -172,6 +177,8 @@ Define pins and Output Data Registers
 //Pin stm32 |PD7|PD6|PD5|PD4|PD3|PD2|PD1|PD0|
 #endif
 
+#endif
+
 #if 0
 #define TFT_DATA       GPIOD
 #define TFT_PORT       PORT_HIGH
@@ -188,7 +195,9 @@ Define pins and Output Data Registers
 #endif
 
 
+#ifndef TFT_CNTRL
 #define TFT_CNTRL GPIOB
+#endif
 #define LL_LOW(LL_GPIO_PIN)  LL_GPIO_WriteOutputPort(TFT_CNTRL, (LL_GPIO_ReadOutputPort(TFT_CNTRL) & ~(LL_GPIO_PIN)))
 #define LL_HIGH(LL_GPIO_PIN) LL_GPIO_WriteOutputPort(TFT_CNTRL, (LL_GPIO_ReadOutputPort(TFT_CNTRL) | LL_GPIO_PIN))
 
@@ -196,11 +205,21 @@ Define pins and Output Data Registers
 // Note:
 // PA15 PB3 PB4 is assigned to JTAG debug port by default on some boards.
 // Therefore, it may not be available by default.
+#ifndef TFT_RD
 #define TFT_RD         LL_GPIO_PIN_0 // PB0
+#endif
+#ifndef TFT_WR
 #define TFT_WR         LL_GPIO_PIN_1 // PB1
+#endif
+#ifndef TFT_RS
 #define TFT_RS         LL_GPIO_PIN_5 // PB5
+#endif
+#ifndef TFT_CS
 #define TFT_CS         LL_GPIO_PIN_6 // PB6
+#endif
+#ifndef TFT_RST
 #define TFT_RST        LL_GPIO_PIN_7 // PB7
+#endif
 
 //#define DELAY          delayMicroseconds(10);
 #define DELAY          (void)0  // NOP