//Initialize all the peripherals
void init_peripherals(void)
{
//Hardware modules:
init_systick_timer(); //SysTick timer
init_usart1(2000000); //USART1 (RS-485 #1)
init_usart6(2000000); //USART6 (RS-485 #2)
init_rs485_outputs();
init_leds();
init_switches();
init_dio(); //All inputs by default
init_adc1();
init_spi4(); //Plan
//init_spi5(); //FLASH
//init_spi6(); //Expansion
init_i2c1();
init_imu();
init_adva_fc_pins();
init_pwr_out();
//Software:
init_master_slave_comm();
//All RGB LEDs OFF
LEDR(0); LEDG(0); LEDB(0);
//Default analog input states:
set_default_analog();
}
void main()
{ int k=0;
WDTCTL = WDTPW + WDTHOLD;
P1DIR|=BIT0;
P1OUT&=~BIT0;
while(1)
{
P1DIR|=(LEDP+LEDN);
P1OUT&=~(LEDP+LEDN);
LEDR();
P1DIR&=~LEDN;
for ( k = 0; k < 50000; k++)
{
if ( (P1IN&LEDN)==0)
break;
}
LEDF();
delay_ms(k/20);
P1OUT=0;
delay_ms(k/20);
}
}
int main()
{
int i=0,j=0,level=0;
FFTSTART(0);
for (i = 0; i < 100000; i++);
while(1)
{
FFTSTART(1);
while (!FFTCOMPLETE); // Wait until FFT operation to finish
FFTSTART(0);
//Read the level signal to determine start of the command
level = FFTLEVEL;
//Clear the led outputs
LEDR(0);
//Check if something is being Spoken
if (level >60)
{
//Glow a LED to indicate start of voice
LEDR(2);
//Save the fft of next 32 samples
for(i=0;i<NUM_SAMPLES;i++)
{
FFTSTART(1);
while(!FFTCOMPLETE) // Wait until FFT operation to finish
FFTSTART(0);
//Save the fftoutput from the fft memory into the array
for (j = 0; j < SAMPLE_SIZE; j++)
{
FFTADDRESS(j);
fftcoeff[i*SAMPLE_SIZE+j] = (float)(short)FFTCOEFF;
}
}
//1 sec sample stored
LEDR(4);
// shift the spectrum into the mel scale
melcepstrum_conversion(fftcoeff, SAMPLE_SIZE*NUM_SAMPLES, mel, 12, 8000);
LEDR(8);
// compute the dct of the mel spectrum
dct(mel, mfcc, 12);
float sum_mel;
//Take the sum of first two coefficients of the dct output
//The first two coefficients contains the maximum information
sum_mel = (mfcc[0] + fabs(mfcc[1]));
LEDG(0); //Clear the output LEDs
if(SWITCH & 1){
if(sum_mel > 59) {
printf("\nYou said Yes");
printf("\t %f",sum_mel);
LEDG(128);
}
else if(sum_mel> 50 && sum_mel<58) {
printf("\nYou said No");
printf("\t %f",sum_mel);
LEDG(1);
}
else if(sum_mel < 60 && sum_mel > 58){
printf("\nPlease be loud and clear!!");
printf("\t %f",sum_mel);
}
else if(sum_mel < 51 && sum_mel > 45){
printf("\nPlease be loud and clear");
printf("\t %f",sum_mel);
}
else {
printf("\nPlease be loud and clear");
printf("\t %f",sum_mel);
}
}//switch end
printf("\n");
}
else
{
//this represent silence
LEDG(0);
LEDR(1);
}
}
}
