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Added option to use SBWIRE to avoid well-known I2C hangup problems with Wire lib #160

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Added option to use SBWIRE to avoid well-known I2C hangup problems with Wire lib #160

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8a86040
Added option to use SBWIRE to avoid well-known I2C hangup problems wi…
paynterf Apr 26, 2020
93dbf2a
Commented #define SBWIRE line out in RTCLib.h
paynterf Apr 26, 2020
9c9d857
Modified to satisfy clang formatting rules
paynterf Apr 26, 2020
ea14ca5
Another clang nitfix
paynterf Apr 26, 2020
b22aba1
two more clang nitfixes
paynterf Apr 26, 2020
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4 changes: 3 additions & 1 deletion RTClib.cpp
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Expand Up @@ -41,15 +41,17 @@
This version: MIT (see LICENSE)
*/
/**************************************************************************/
#include "RTClib.h"

#ifdef __AVR_ATtiny85__
#include <TinyWireM.h>
#define Wire TinyWireM
#elif defined USE_SBWIRE // Uncomment #define in RTClib.h to fix I2C lockups
#include <SBWire.h>
#else
#include <Wire.h>
#endif

#include "RTClib.h"
#ifdef __AVR__
#include <avr/pgmspace.h>
#elif defined(ESP8266)
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3 changes: 3 additions & 0 deletions RTClib.h
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Expand Up @@ -25,6 +25,9 @@
#include <Arduino.h>
class TimeSpan;

// uncomment next line to use SBWire, which fixes Wire library lockup problems
//#define USE_SBWIRE

/** Registers */
#define PCF8523_ADDRESS 0x68 ///< I2C address for PCF8523
#define PCF8523_CLKOUTCONTROL 0x0F ///< Timer and CLKOUT control register
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