Hello. I'am begginer in Arduino and I don't know how to realize this requirement.
I need to write on a digital pin this signal(to view the similar waveform on the digital pin on an oscilloscope).
Thank you.
What frequency?
Is not specified, so I think it is not important.
Not a very useful requirement.
Use digitalWrite and delay or delayMicroseconds.
I did what you said, but when I want to see two signals (different pins), no one is viewed correctly. Cand you help me with a code to se different waveforms on two different pins. Thank you.
I can't see your code.
I can't see anything in the requirement about two pins.
SebastianD:
Is not specified, so I think it is not important.
-
It is important that you tell us the duration of bit (the bit period).
-
Is the bit period same for all the bits?
-
Is it the MSBit of the LSBit that is getting out first?
-
Is there any DC bias in the signal? The signal that you have presented seems to have a slight DC bias.
Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html .
Then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Thanks.. Tom... 
Two different pins??
This will shift out a byte on pin 2 with a 0.5-sec bit time. If you need more you need to be clearer on your requirements.
#define BIT_TIME 500ul //set to whatever bit time you want (mS)
const byte cData = 0b01001011; //const to shift out
const byte pinData = 13; //pin on which to shift
byte mask = 0x80; //bit mask
void setup()
{
//set pin as output
pinMode( pinData, OUTPUT );
//go through the 8 bits
for( int bit=0; bit<8; bit++ )
{
//if the bit position in the data byte is set...
if( cData & mask )
digitalWrite( pinData, HIGH ); //set output high
else
digitalWrite( pinData, LOW ); //otherwise low
//delay for a bit period
//delay normally bad but simplest solution for demo
delay( BIT_TIME );
//shift mask one bit to the right so it goes
//80, 40, 20, ... 02, 01
mask >>= 1;
}//mask
}//setup
void loop()
{
}//loop