Hi all,
I am using the following C++ code to read values from an ADC.
HandleOKCallback is properly called and adc and volt arrays are being
filled with data.
class ReadWorker : public Nan::AsyncWorker {
public:
ReadWorker(Nan::Callback *callback, int channel):
Nan::AsyncWorker(callback), channel(channel) { }
void Execute() {
...
}
void HandleOKCallback() {
Nan:: HandleScope scope;
Local<Value> argv[3];
argv[1] = Nan::New<Array>(*adc),
argv[2] = Nan::New<Array>(*volt);
if (!initialized) {
argv[0] = Nan::Error("failed to initialize ADC");
} else if (failed) {
argv[0] = Nan::Error("failed to read ADC");
} else {
argv[0] = Nan::Null();
}
callback->Call(3, argv);
}
private:
int channel;
int32_t adc[8];
int32_t volt[8];
...
However the following Javascript yields an error under node.js telling me
that adc and volt are not available.
ad.read(channel, function(err, adc, volt) {
end = new Date().getTime();
if (err) {
console.warn('' + err);
} else {
var elapsed = end - start;
console.log("adc: %s, volt: %s%%, time: %dms", adc[7].toFixed(2),
volt[7].toFixed(2), end - start);
}
});
I assume that there is something wrong with the code highlighted in red
above but I don't get it. Any help is appreciated!
Thanks,
Martin.
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