From 5cb8e279e946aaf086dbb7db79b8c8823d61f6f4 Mon Sep 17 00:00:00 2001
From: Andrew Young <yngndrw@gmail.com>
Date: Thu, 6 Jul 2017 22:08:31 +0100
Subject: [PATCH] Set I2C clock to 1MHz for Adafruit Feather M0 (And presumably
 Arduino Zero)

---
 Adafruit_SSD1306.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Adafruit_SSD1306.cpp b/Adafruit_SSD1306.cpp
index 570a3358..56e501e9 100644
--- a/Adafruit_SSD1306.cpp
+++ b/Adafruit_SSD1306.cpp
@@ -204,6 +204,9 @@ void Adafruit_SSD1306::begin(uint8_t vccstate, uint8_t i2caddr, bool reset) {
   {
     // I2C Init
     Wire.begin();
+#ifdef ARDUINO_SAMD_ZERO
+    Wire.setClock(1000000u); // Fast mode plus: 1MHz
+#endif
 #ifdef __SAM3X8E__
     // Force 400 KHz I2C, rawr! (Uses pins 20, 21 for SDA, SCL)
     TWI1->TWI_CWGR = 0;