From f1bf884e9445c7c276b88cb58d2ce6a66a9d6186 Mon Sep 17 00:00:00 2001
From: WereCatf <werecatf@gmail.com>
Date: Tue, 24 Nov 2020 04:54:43 +0200
Subject: [PATCH] Fix for Heltec CubeCell

Heltec's CubeCell Arduino-core is (currently) missing the functions used for direct register-manipulation, so do not defined HAVE_PORTREG for now. This fix can always be removed, if Heltec ever comes around to implementing said functions.
---
 Adafruit_SSD1306.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Adafruit_SSD1306.h b/Adafruit_SSD1306.h
index eaa6f923..dece29b1 100644
--- a/Adafruit_SSD1306.h
+++ b/Adafruit_SSD1306.h
@@ -49,7 +49,7 @@ typedef volatile RwReg PortReg;
 typedef uint32_t PortMask;
 #define HAVE_PORTREG
 #elif (defined(__arm__) || defined(ARDUINO_FEATHER52)) &&                      \
-    !defined(ARDUINO_ARCH_MBED)
+    !defined(ARDUINO_ARCH_MBED) && !defined(__ASR6501__)
 typedef volatile uint32_t PortReg;
 typedef uint32_t PortMask;
 #define HAVE_PORTREG