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Check that pins needed by Wire are defined at compile-time #4261

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Jan 30, 2018
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Check that pins needed by Wire are defined at compile-time #4261

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7 changes: 7 additions & 0 deletions libraries/Wire/Wire.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,13 @@ extern "C" {
#include "twi.h"
#include "Wire.h"


//Some boards don't have these pins available, and hence don't support Wire.
//Check here for compile-time error.
#if !defined(PIN_WIRE_SDA) || !defined(PIN_WIRE_SCL)
#error Wire library is not supported on this board
#endif

// Initialize Class Variables //////////////////////////////////////////////////

uint8_t TwoWire::rxBuffer[BUFFER_LENGTH];
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