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Added support for STM32duino #56

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Added support for STM32duino #56

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17 changes: 14 additions & 3 deletions src/DS3232RTC.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,11 @@
#elif ARDUINO >= 100
#include <Wire.h>
#define i2cBegin Wire.begin
#define i2cBeginTransmission Wire.beginTransmission
#ifdef __STM32F1__
#define i2cBeginTransmission if (_do_init) { _do_init = false; Wire.begin(); } Wire.beginTransmission
#else
#define i2cBeginTransmission Wire.beginTransmission
#endif
#define i2cEndTransmission Wire.endTransmission
#define i2cRequestFrom Wire.requestFrom
#define i2cRead Wire.read
Expand Down Expand Up @@ -116,7 +120,10 @@ byte DS3232RTC::errCode; // for debug
// the begin() function in the setup code.
DS3232RTC::DS3232RTC(bool initI2C)
{
if (initI2C) i2cBegin();
// At the moment, Arduino for STM32 (STM32duino) doesn't support GPIO or SPI etc operations inside constructors.
#ifndef __STM32F1__
if (initI2C) i2cBegin();
#endif
}

// Initialize the I2C bus.
Expand Down Expand Up @@ -370,6 +377,10 @@ uint8_t __attribute__ ((noinline)) DS3232RTC::bcd2dec(uint8_t n)
return n - 6 * (n >> 4);
}

#ifdef ARDUINO_ARCH_AVR
#if defined(ARDUINO_ARCH_AVR) || defined(__STM32F1__)
DS3232RTC RTC; // instantiate an RTC object
#endif

#ifdef __STM32F1__
bool DS3232RTC::_do_init = true;
#endif
5 changes: 4 additions & 1 deletion src/DS3232RTC.h
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Original file line number Diff line number Diff line change
Expand Up @@ -76,9 +76,12 @@ class DS3232RTC
private:
uint8_t dec2bcd(uint8_t n);
static uint8_t bcd2dec(uint8_t n);
#ifdef __STM32F1__
static bool _do_init;
#endif
};

#ifdef ARDUINO_ARCH_AVR
#if defined(ARDUINO_ARCH_AVR) || defined(__STM32F1__)
extern DS3232RTC RTC;
#endif

Expand Down