From 4b194472beea4fe799b98b83ca6a7bc49e12b406 Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Fri, 28 Sep 2018 20:20:33 -0400
Subject: [PATCH] add atmega16 chips, link to references

---
 quantum/config_common.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/quantum/config_common.h b/quantum/config_common.h
index fb0cffe8b8..822ac35611 100644
--- a/quantum/config_common.h
+++ b/quantum/config_common.h
@@ -26,6 +26,9 @@
 
     #define PORT_SHIFTER 4 // this may be 4 for all AVR chips
 
+    // If you want to add more to this list, reference the PINx definitions in these header
+    // files: https://github.com/vancegroup-mirrors/avr-libc/tree/master/avr-libc/include/avr
+
     #if defined(__AVR_ATmega32U4__)
         #define ADDRESS_BASE 0x00
         #define PINB_ADDRESS 0x3
@@ -52,6 +55,18 @@
         #define PINC_ADDRESS 0x3
         #define PINB_ADDRESS 0x6
         #define PINA_ADDRESS 0x9
+    #elif defined(__AVR_ATmega16U2__)
+        #define ADDRESS_BASE 0x00
+        #define PINB_ADDRESS 0x3
+        #define PINC_ADDRESS 0x6
+        #define PIND_ADDRESS 0x9
+    #elif defined(__AVR_ATmega16U4__)
+        #define ADDRESS_BASE 0x00
+        #define PINB_ADDRESS 0x3
+        #define PINC_ADDRESS 0x6
+        #define PIND_ADDRESS 0x9
+        #define PINE_ADDRESS 0xC
+        #define PINF_ADDRESS 0xF
     #else
         #error "Pins are not defined"
     #endif