begin-transmission
xod/i2c/begin-transmission
Begins a transmission to the I²C slave device.
Possible errors:
— Invalid I2C address
begin-transmission
@/begin-transmission
Begins a transmission to the I²C slave device.
Possible errors:
— Invalid I2C address
I2C@/i2c
I²C interface object
ADDRbyte
I²C address of the target slave device
SENDpulse
Triggers the transmission start
DONEpulse
Pulses when the transmission successfully starts. Chain it to a `write-byte` node.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_SEND
#pragma XOD error_raise enable
node {
void evaluate(Context ctx) {
if (!isInputDirty<input_SEND>(ctx))
return;
uint8_t addr = getValue<input_ADDR>(ctx);
if (addr > 127) {
raiseError(ctx); // Invalid I2C address
return;
}
auto wire = getValue<input_I2C>(ctx);
wire->beginTransmission(addr);
emitValue<output_DONE>(ctx, 1);
}
}