#define _TEMP 0x03
#define _HUMI 0x05
#define _RESET 0x1E
const float d1C = -40.1; //@ i4bit
const float d2C = 0.01; //@ i4bit
const float C1 = -4.0; //@ 12bit
const float C2 = 0.0405; //@ 12bit
const float C3 = -0.0000028; //@ 12bit
const float t1 = 0.01; //@ 12bit
const float t2 = 0.00008; //@ 12bit
float tempt, humi;
float RH_linear, RH_true;
char txt[13];
char *ptr;
void DATA_X(char CMD){ //Direction Change For DATA PIN is PORTB AND PIN0
if (CMD==0){
PORTB.DIR = PORTC.DIR | 0x1;
}else{
PORTB.DIR = PORTC.DIR & 0xFE;
}
}
void SCK(char CMD){ // SCK DATA Change
if (CMD==0){
PORTE.OUT = PORTC.OUT & 0xF7;
}else{
PORTE.OUT = PORTC.OUT | 0x8;
}
}
void DATAO(char CMD){ //DATA PIN data Change
if (CMD==0){
PORTB.OUT = PORTC.OUT & 0xFE;
}else{
PORTB.OUT = PORTC.OUT | 0x1;
}
}
//function use for measure temperature or humidiy from SHT only
unsigned SHT_Measure(char CMD){
char i;
char m = 128;
unsigned temp = 0;
DATA_X(0);
DATAO(1);
delay_us(1);
SCK(0);
delay_us(1);
// Connection reset sequence
for(i=0; i<10; i++){
SCK(1);
delay_us(1);
SCK(0);
delay_us(1);
}
// initial transmistion pluses
DATAO(1);
delay_us(2);
SCK(1);
delay_us(2);
DATAO(0);
delay_us(2);
SCK(0);
delay_us(5);
SCK(1);
delay_us(2);
DATAO(1);
delay_us(2);
SCK(0);
//Transmit command.
for(i=0; i<8; i++){
if(!(m & CMD)) DATAO(0);
else DATAO(1);
delay_us(2);
SCK(1);
delay_us(2);
SCK(0);
delay_us(2);
m >>= 1;
}
//Check acknowledge pulse. return 0 if no pulse.
DATA_X(1);
SCK(1);
delay_us(2);
if(PORTB.IN & 1) return 0;
SCK(0);
while(!(PORTB.IN & 1));
// wait until data is ready
while(PORTB.IN & 1);
//delay_ms(250);
// get first byte MSB
for(i=0; i<8; i++){
temp <<= 1;
SCK(1);
delay_us(2);
if(PORTB.IN & 1) temp |= 1;
SCK(0);
delay_us(2);
}
// acknowledge pluse
DATA_X(0);
DATAO(0);
delay_us(2);
SCK(1);
delay_us(2);
SCK(0);
delay_us(2);
DATA_X(1);
// get second byte LSB
for(i=0; i<8; i++){
temp <<= 1;
SCK(1);
delay_us(2);
if(PORTB.IN & 1) temp |= 1;
SCK(0);
delay_us(2);
}
// return value without CRC
return temp;
}
Void main(void){
while(1){
//read adc temperature value from SHT
tempt = SHT_Measure(_TEMP);
tempt = d1C + (tempt * d2C);
ftoa(tempt,2,txt);
printf_uartc0("T : ");
printf_uartc0(txt);
printf_uartc0("\r");
//read adc humidity value from SHT
humi = SHT_Measure(_HUMI);
RH_linear = C1 + (C2*humi) + (C3*humi*humi);
RH_true = (tempt-25)*(t1+(t2*humi))+ RH_linear;
if(RH_true > 100.0) RH_true = 100.0;
if(RH_true < 0.1) RH_true = 0.1;
ftoa(RH_true,2,txt);
printf_uartc0("H : ");
printf_uartc0(txt);
printf_uartc0("\r");
delay_ms(500);
}
}
oo: دقیقا تابع برای فراخوانی مقدار اندازی گیری شده چیه؟ :read:
oo: دقیقا تابع برای فراخوانی مقدار اندازی گیری شده چیه؟ :read:adc_sample[index]=ADC_ResultCh_GetWord(&ADCA.CH0); ADC_Ch_Conversion_Start(&ADCA.CH0);
ISR (ADCA_CH0_vect)
{
C[2]=ADC_ResultCh_GetWord(&ADCA.CH0);
}
دیدگاه