Sawtooth waveform on arduino

Chinmaye · Feb 14, 2018

Hello,
I am trying to generate a sawtooth waveform using Arduino and DAC 0808. I connected the two checked that the DAC works properly. That is when i make MSB = 1 and rest of the bits =0, Multimeter reads vref/2. I have configured pins 2 to 9 are output pins with 2 being LSB and 9 MSB. I also see that it works fine on serial monitor. Not sure whats wrong with it. Please help.

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
int val;
byte mask;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
for (int i = 2; i < 10; i++)
  {
    pinMode(i, OUTPUT);
  }
  val = 0;
}
 
void loop() {
  // put your main code here, to run repeatedly:
 
 
   int k =2;
   for (mask = 00000001; mask>0; mask <<= 1) { //iterate through bit mask
    if (val & mask){ // if bitwise AND resolves to true
      digitalWrite(k,HIGH); // send 1
   
    }
    else{ //if bitwise and resolves to false
     digitalWrite(k,LOW); // send 0
 
}
   k++;
   }
 
val++;
if (val > 255)
 
  val = 0;
 
}

Sawtooth waveform on arduino

Chinmaye

Full Member level 3

Similar threads

Sawtooth waveform on arduino

Chinmaye

Full Member level 3

Similar threads

Privacy & Transparency

Privacy & Transparency