Hi, sorry if it's a stupid question but I try to send a synchronisation pattern (0x55 0x55 0x00 0x00 0xFF) to one of my board via the SoftwareSerial library (arduino v1.0.3).
I use these lines:
mySerial.write(0x55);
mySerial.write(0x55);
mySerial.write(0x00);
mySerial.write(0x00);
mySerial.write(0x00);
mySerial.write(0xFF);
At the first "mySerial.write(0x00);" I got this error: call of overloaded 'write(int)' is ambiguous
Can somebody help?
Thx
mySerial.write( (uint8_t) 0x00 );
...or...
mySerial.write( (byte) 0x00 );
If you're feeling especially verbose...
const uint8_t ZeroByte = 0x00;
mySerial.write( ZeroByte );
Why is this only a problem for the 0x00 , and not a problem for the 0x55 ?
And wouldn't it be easier to put this sequence into some kind of string or array or even a loop, rather
than waste code space with 5 calls to the same function ?
Thx Coding Badly, it's working perfectly now.
Yes, why do 0x55 & 0xFF get interpreted as bytes, while 0x00 gets interpreted as an int?
creating a variable:
const byte ZeroByte = 0;
and then using that seems simple enough:
mySerial.write(0x55);
mySerial.write(0x55);
mySerial.write(ZeroByte);
mySerial.write(ZeroByte);
mySerial.write(ZeroByte);
mySerial.write(0xFF);
michinyon:
Why is this only a problem for the 0x00 , and not a problem for the 0x55 ?
And wouldn't it be easier to put this sequence into some kind of string or array or even a loop, rather than waste code space with 5 calls to the same function ?
It's only a "waste" if the amount of Flash available is approaching or has surpassed zero.
CrossRoads:
Yes, why do 0x55 & 0xFF get interpreted as bytes, while 0x00 gets interpreted as an int?
See the link above.
creating a variable ... const byte ZeroByte = 0; ... and then using that seems simple enough:
I like it more than the typecast.
Interesting.
maomao:
Can somebody help?
It would IMO be cleaner, as well as resolving your problem, to put the byte sequence into a const byte array and make one call to Serial.write() to send the array.