Posted on September 23, 2016 at 12:26APB2 clock
: 100Mhz
ADC clock: 100/4=25Mhz
Data resolution: 12bit
One conversion time = 15/25 = 0.6us, 6 conversion is 3.6us
But in real environment when i test on device i got the result: 6 conversations = 1.8us
What does the problem i get? Please help me!
My program
#define C_NUM (10000)
main(){
T_ADC_REQ_SEQ_SET pk_adc_seq_set;
UH vals[6];
UW c,t0,t1;
double ta,tb;
pk_adc_ini.align = 0;
pk_adc_ini.res = 0;
ercd = ini_adc();
pk_adc_seq_set.scn_num = 6;
pk_adc_seq_set.scn_seq[0]=8;
pk_adc_seq_set.scn_seq[1]=7;
pk_adc_seq_set.scn_seq[2]=6;
pk_adc_seq_set.scn_seq[3]=10;
pk_adc_seq_set.scn_seq[4]=0;
pk_adc_seq_set.scn_seq[5]=3;
ctl_adc(ADC_REQ_SEQ_SET,&pk_adc_seq_set);
ercd = ctl_adc(ADC_REQ_STA,);
for(;;){
c = C_NUM;
t0 = get_time();
while (c) {
gets_adc(ch, vals);
c--;
}
t1 = get_time();
ta = ((double) (t1 - t0) / (double) C_NUM);
c = C_NUM;
t0 = get_time();
while (c) {
c--;
}
t1 = get_time();
tb = ((double) (t1 - t0) / (double) C_NUM);
printf(''%f\n'',(double)( ta - tb));
}
}
