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调试IIC时,初始化出不来, #34

@kaihuaa

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@kaihuaa

void TwoWire::set_scl(bool state)
{
I2C_DELAY(this->i2c_delay);
digitalWrite(this->scl_pin, state);
//Allow for clock stretching - dangerous currently
if (state == HIGH)
{
while(digitalRead(this->scl_pin) == 0);
}
}

卡在了 while里面 请问这个 while有什么作用

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