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Wire: fix "Arduino way" I2C scan #214

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Merged
merged 1 commit into from
May 17, 2021
Merged

Wire: fix "Arduino way" I2C scan #214

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8 changes: 8 additions & 0 deletions libraries/Wire/Wire.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,14 @@ void arduino::MbedI2C::beginTransmission(uint8_t address) {
}

uint8_t arduino::MbedI2C::endTransmission(bool stopBit) {
#ifndef TARGET_PORTENTA_H7
if (usedTxBuffer == 0) {
// we are scanning, return 0 if the addresed device responds with an ACK
char buf[1];
int ret = master->read(_address, buf, 1, !stopBit);
return ret;
}
#endif
if (master->write(_address, (const char *) txBuffer, usedTxBuffer, !stopBit) == 0) return 0;
return 2;
}
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