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Wire.endTransmission() uses write() to enable I2C scanning #1

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Wire.endTransmission() uses write() to enable I2C scanning #1

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13 changes: 3 additions & 10 deletions libraries/Wire/Wire.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -69,16 +69,9 @@ 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;
if (usedTxBuffer == 0) return 2; // received NAK on transmit of address (without data)
return 3; // received NAK on transmit of data
}

uint8_t arduino::MbedI2C::endTransmission(void) {
Expand Down Expand Up @@ -188,4 +181,4 @@ arduino::MbedI2C Wire(I2C_SDA, I2C_SCL);
#endif
#if WIRE_HOWMANY > 1
arduino::MbedI2C Wire1(I2C_SDA1, I2C_SCL1);
#endif
#endif