CODEWITHSUNDEEP
embeddedmicroprocessorsmbed16-bitdac
brownspiderman
brownspiderman

Reputation: 1

16 bit to 12 bit conversion between microcontroller and dac

#include "mbed.h"
DigitalOut gpo(PTD7);
AnalogOut Aout(PTE30);
float x; 
unsigned int i,j;

int main() {
   x=0;
   i=0;
   while(1) {
      gpo=i & 1;
      x=16*2047.0*(1+sin(2*3.142*i/64));
      j=x; 
      Aout.write_u16(j);
      i++; 
   } 
}

This code is supposed to produce a sine wave from the DAC. The microcontroller I'm using is 16 bits while the DAC that the information is being sent to is 12 bits. The line x=... is the equation for a sine wave and produces new values for a sine wave every loop. Can someone explain why we need to multiply the value by 16*2047? like how does this help calibrate the waveform ?

Upvotes: 0

Views: 422

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