From 831b73d342d415ff57bd4a85f6cd53b134c0123e Mon Sep 17 00:00:00 2001
From: totalretribution <totalretribution@users.noreply.github.com>
Date: Fri, 7 Mar 2025 16:39:35 +0000
Subject: [PATCH 1/4] Added MCP23018 class with support for OUTPUT_PULLUP in
 pinMode.

---
 src/Adafruit_MCP23X18.cpp | 32 ++++++++++++++++++++++++++++++++
 src/Adafruit_MCP23X18.h   | 25 +++++++++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 src/Adafruit_MCP23X18.cpp
 create mode 100644 src/Adafruit_MCP23X18.h

diff --git a/src/Adafruit_MCP23X18.cpp b/src/Adafruit_MCP23X18.cpp
new file mode 100644
index 0000000..e2aa611
--- /dev/null
+++ b/src/Adafruit_MCP23X18.cpp
@@ -0,0 +1,32 @@
+/*!
+ * @file Adafruit_MCP23X18.cpp
+ */
+
+#include "Adafruit_MCP23X18.h"
+
+/**************************************************************************/
+/*!
+  @brief default ctor.
+*/
+/**************************************************************************/
+Adafruit_MCP23X18::Adafruit_MCP23X18() { pinCount = 16; }
+
+/**************************************************************************/
+/*!
+  @brief Configures the specified pin to behave either as an input or an
+  output.
+  @param pin the Arduino pin number to set the mode of
+  @param mode INPUT, OUTPUT, or INPUT_PULLUP
+*/
+/**************************************************************************/
+void Adafruit_MCP23X18::pinMode(uint8_t pin, uint8_t mode) {
+  Adafruit_BusIO_Register IODIR(i2c_dev, spi_dev, MCP23XXX_SPIREG,
+                                getRegister(MCP23XXX_IODIR, MCP_PORT(pin)));
+  Adafruit_BusIO_Register GPPU(i2c_dev, spi_dev, MCP23XXX_SPIREG,
+                               getRegister(MCP23XXX_GPPU, MCP_PORT(pin)));
+  Adafruit_BusIO_RegisterBits dir_bit(&IODIR, 1, pin % 8);
+  Adafruit_BusIO_RegisterBits pullup_bit(&GPPU, 1, pin % 8);
+
+  dir_bit.write((mode == OUTPUT) ? 0 : 1); 
+  pullup_bit.write((mode == INPUT_PULLUP || mode == OUTPUT_PULLUP) ? 1 : 0);
+}
\ No newline at end of file
diff --git a/src/Adafruit_MCP23X18.h b/src/Adafruit_MCP23X18.h
new file mode 100644
index 0000000..e5a660b
--- /dev/null
+++ b/src/Adafruit_MCP23X18.h
@@ -0,0 +1,25 @@
+/*!
+ * @file Adafruit_MCP23X18.h
+ */
+
+#ifndef __ADAFRUIT_MCP23X18_H__
+#define __ADAFRUIT_MCP23X18_H__
+
+#include "Adafruit_MCP23X17.h"
+
+#define OUTPUT_PULLUP 4
+
+/**************************************************************************/
+/*!
+    @brief  Class for MCP23018 I2C and MCP23S18 SPI variants.
+*/
+/**************************************************************************/
+class Adafruit_MCP23X18 : public Adafruit_MCP23X17 {
+public:
+  Adafruit_MCP23X18();
+  
+  void pinMode(uint8_t pin, uint8_t mode);
+
+};
+
+#endif
\ No newline at end of file

From cbc9261d2d2de6f69e2a62fc12478237524056b3 Mon Sep 17 00:00:00 2001
From: Neil <totalretribution@users.noreply.github.com>
Date: Mon, 10 Mar 2025 17:24:00 +0000
Subject: [PATCH 2/4] Added comment for OUTPUT_PULLUP

---
 src/Adafruit_MCP23X18.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Adafruit_MCP23X18.h b/src/Adafruit_MCP23X18.h
index e5a660b..6a0d0eb 100644
--- a/src/Adafruit_MCP23X18.h
+++ b/src/Adafruit_MCP23X18.h
@@ -7,7 +7,7 @@
 
 #include "Adafruit_MCP23X17.h"
 
-#define OUTPUT_PULLUP 4
+#define OUTPUT_PULLUP 4 //!< Additional define for Output with Pullup
 
 /**************************************************************************/
 /*!
@@ -22,4 +22,4 @@ class Adafruit_MCP23X18 : public Adafruit_MCP23X17 {
 
 };
 
-#endif
\ No newline at end of file
+#endif

From ffb972c8e4e4cb5a089edf4f87d4e4e404265aa0 Mon Sep 17 00:00:00 2001
From: Neil <totalretribution@users.noreply.github.com>
Date: Mon, 10 Mar 2025 17:27:28 +0000
Subject: [PATCH 3/4] Removed new line.

---
 src/Adafruit_MCP23X18.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/Adafruit_MCP23X18.h b/src/Adafruit_MCP23X18.h
index 6a0d0eb..fc05da3 100644
--- a/src/Adafruit_MCP23X18.h
+++ b/src/Adafruit_MCP23X18.h
@@ -19,7 +19,6 @@ class Adafruit_MCP23X18 : public Adafruit_MCP23X17 {
   Adafruit_MCP23X18();
   
   void pinMode(uint8_t pin, uint8_t mode);
-
 };
 
 #endif

From 85e2b7c44d6648eaa17fd690fba0f58f02f2b4d7 Mon Sep 17 00:00:00 2001
From: totalretribution <totalretribution@users.noreply.github.com>
Date: Tue, 11 Mar 2025 20:32:08 +0000
Subject: [PATCH 4/4] Removed whitespace.

---
 src/Adafruit_MCP23X18.cpp | 2 +-
 src/Adafruit_MCP23X18.h   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Adafruit_MCP23X18.cpp b/src/Adafruit_MCP23X18.cpp
index e2aa611..d8accf4 100644
--- a/src/Adafruit_MCP23X18.cpp
+++ b/src/Adafruit_MCP23X18.cpp
@@ -27,6 +27,6 @@ void Adafruit_MCP23X18::pinMode(uint8_t pin, uint8_t mode) {
   Adafruit_BusIO_RegisterBits dir_bit(&IODIR, 1, pin % 8);
   Adafruit_BusIO_RegisterBits pullup_bit(&GPPU, 1, pin % 8);
 
-  dir_bit.write((mode == OUTPUT) ? 0 : 1); 
+  dir_bit.write((mode == OUTPUT) ? 0 : 1);
   pullup_bit.write((mode == INPUT_PULLUP || mode == OUTPUT_PULLUP) ? 1 : 0);
 }
\ No newline at end of file
diff --git a/src/Adafruit_MCP23X18.h b/src/Adafruit_MCP23X18.h
index fc05da3..8cd97b1 100644
--- a/src/Adafruit_MCP23X18.h
+++ b/src/Adafruit_MCP23X18.h
@@ -17,7 +17,7 @@
 class Adafruit_MCP23X18 : public Adafruit_MCP23X17 {
 public:
   Adafruit_MCP23X18();
-  
+
   void pinMode(uint8_t pin, uint8_t mode);
 };