having difficulty while programming

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1

hi, i need to program an INTEL8051 to interface APR6008, and i've got the code everything is clear regarding this but a few like
"int incomingByte = 0;
int proceso = 0;"
and
"void loop(){
digitalWrite(7,HIGH);
if(digitalRead(2) == HIGH){
incomingByte = 49;
}
else if(digitalRead(3) == HIGH){
incomingByte = 50;
}
else if(digitalRead(4) == HIGH){
incomingByte = 51;
}
clock();
if(incomingByte == 49){
if(proceso == 0){
grabaPrimero();
proceso = 1;
}
else{
if(digitalRead(5) == LOW){
graba();
}
}

}
"
please elaborate what are the "incomingByte 49,50,51 ? and 'proceso'

2

49, 50, 51 are the ASCII characters '1', '2' and '3'.

i need to program an INTEL8051 to interface APR6008,

A what to a what?

Please use code tags when posting code.

3

You need to provide links to the specifications for the devices you are using.

You need to post the entire code, not just a part of it, and within code tags so we can read it easily - use the # button above the edit window.

Where did you get the code - have you a link to that?

You seem to have posted most of the code as part of your question, so what exactly do you mean by

everything is clear regarding this

.

...R