From 0f279ff9ec677486244e288e8c6bb55f47b0f373 Mon Sep 17 00:00:00 2001
From: Alexander Heldt <me@alexanderheldt.se>
Date: Wed, 1 Jan 2025 12:22:09 +0100
Subject: [PATCH] Add `PORT` macro

And use it in the `PIN` macro
---
 src/gpio.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/gpio.h b/src/gpio.h
index 3bc669e..bad0e48 100644
--- a/src/gpio.h
+++ b/src/gpio.h
@@ -21,8 +21,10 @@ struct gpio {
 #define GPIO_PORT_OFFSET (0x400U)
 #define GPIO(port) ((struct gpio*)(uintptr_t)(GPIO_BASE_ADDR + (GPIO_PORT_OFFSET * port)))
 
+// Create a 8bit number from a port
+#define PORT(port) (((port) - 'A') << 8)
 // Create a 16bit number from a port and pin
-#define PIN(port, num) ((((port) - 'A') << 8) | num)
+#define PIN(port, num) (PORT(port) | num)
 // get the lower byte from a PIN
 #define PINNUM(pin) (pin & 0b1111)
 // get the upper byte from a PIN