10 years, 2 months ago.  This question has been closed. Reason: N/A

NXP LPC 1768

I'm working on mbed pin Pwmout for Mic output. I need an output of 1 or 1.2 kHz from mbed going to the low pass filter and voltage divider. After passing through the filter and voltage divider, I need an output of 1 kHz frequency and minimum voltage of 1.65 V.

Below is the code that I have written but I can not figure out problem. Any help would be appreciable.

1. include "mbed.h"

PwmOut micAudioOut(p24);

float pwmAudioOut = 1;

int main() { micAudioOut.period_ms(1); Period set to 1ms = 1kHz

while(1) {

for (float i = 0; i <= 1.0; i = i + 0.2){

pwmAudioOut = pwmAudioOut + i; wait(0.2);

} } }

#include "mbed.h"
PwmOut micAudioOut(p24);

float pwmAudioOut = 1;

int main() { 
micAudioOut.period_ms(1);  //Period set to 1ms = 1kHz
while(1) {
   for (float i = 0; i <= 1.0; i = i + 0.2){
      pwmAudioOut = pwmAudioOut + i; wait(0.2);
      } 
   } 
}

#include "mbed.h"
PwmOut micAudioOut

int main(){
   micAudioOut.period_ms(1);
   while(1);
}