Register
Loginผมเขียน SHT 15กับLCD16x4 แต่ทดลองจิงขึ้น จอดำเป็นแถบ ใช้ฟังก์ชัน LCD 20x4 อยากรู้สาเหตุว่าเป็นที่โปรแกรมหรือป่าวคร๊าบ ขอช่วยแก้ไขให้หน่อยน่ะคร๊าบ
โค้ดคร๊าบ ที่เขียน
#include <16f877.h>
#fuses HS,NOWDT,NOLVP,NOBROWNOUT
#use delay(clock=20M)
#include "LCD420.c"
#include<math.h>
#define SHT15_DATA PIN_a1
#define SHT15_SCK PIN_a0
#define MEASURE_TEMP 0x03
#define MEASURE_HUMI 0x05
#define RESET 0x1E
//Temperature
#define D1 -39.75
#define D2 0.01
//Humidity
#define C1 -4.0
#define C2 0.0405
#define C3 -0.0000028
//true humidity
#define T1 0.01
#define T2 0.00008
long CRC;
//*************Tranmission Start*******************//
void SHT15Start()
{
output_high(SHT15_DATA);
output_low(SHT15_SCK);
output_high(SHT15_SCK);
output_low(SHT15_DATA);
output_low(SHT15_SCK);
output_high(SHT15_SCK);
output_high(SHT15_DATA);
output_low(SHT15_SCK);
}
//*************Reset SHT15*******************//
void SHT15Reset()
{
int i;
output_high(SHT15_DATA);
for(i=0;i<9;i++)
{
output_high(SHT15_SCK);
delay_us(2);
output_low(SHT15_SCK);
delay_us(2);
}
SHT15Start();
}
//****************Adr.Measure****************//
int SHT15Measure(int Data)
{
int i;
for (i=0x80;i>0;i/=2)
{
if(i&Data){
output_high(SHT15_DATA);
}
else{
output_low(SHT15_DATA);
}
delay_us(2);
output_high(SHT15_SCK);
delay_us(2);
output_low(SHT15_SCK);
}
output_float(SHT15_DATA);
delay_us(2);
output_high(SHT15_SCK);
delay_us(2);
i=input(SHT15_DATA);
output_low(SHT15_SCK);
delay_ms(250);
return(i);
}
//*************Read SHT15*******************//
long SHT15Read(void)
{
int i;
long Tmp,Value,MSB,LSB,CRC;
MSB=0;
LSB=0;
CRC=0;
for(i=0;i<8;i++) //********Read MSB********//
{
MSB<<=1;
output_high(SHT15_SCK);
Tmp=input(SHT15_DATA);
Delay_us(2);
output_low(SHT15_SCK);
Delay_us(2);
if(Tmp){
MSB|=1;
}
}
output_low(SHT15_DATA);
output_high(SHT15_SCK);
Delay_Us(2);
output_float(SHT15_DATA);
output_low(SHT15_SCK);
Delay_us(2);
for(i=0;i<8;i++) //********Read LSB********//
{
LSB<<=1;
output_high(SHT15_SCK);
Tmp=input(SHT15_DATA);
Delay_us(2);
output_low(SHT15_SCK);
Delay_us(2);
if(Tmp){
LSB|=1;
}
}
output_low(SHT15_DATA);//Acknowledge routine for CRC
delay_us(2);
output_high(SHT15_SCK);
delay_us(2);
output_low(SHT15_SCK);
output_float(SHT15_DATA); //Change to Input
delay_us(2);
for(i=0;i<8;i++)
{
CRC<<=1;
output_high(SHT15_SCK);
Tmp=input(SHT15_DATA);
output_low(SHT15_SCK);
if(Tmp){
CRC|=1;
}
}
Value=make16(MSB,LSB); // makes 16 bit number out of two 8 bit numbers
return(Value);
}
void SHT15SoftReset()
{
SHT15Reset();
SHT15measure(RESET);
}
//*************Main Function*******************//
void main(void)
{
float Value_temp,Value_humi;
float Temp,Humi_linear,Humi_True;
int R;
lcd_init();
lcd_putc("\fProgram Ready...\n");
SHT15softReset();
while(TRUE)
{
delay_ms(12); //delay>11 ms before next command
//start transmission
SHT15Start();
//measure Temperature
R=SHT15Measure(MEASURE_TEMP);
//check sensor connect
if(R==1)
{
printf(lcd_putc,"\fSensor Error");
delay_ms(1000);
continue;
}
//calculation temperature
Value_Temp=SHT15Read();
Temp=D1+(D2*Value_Temp);
//Delay>11 ms for next command
delay_ms(12);
//start transmission
SHT15Start();
//measure Humidity
SHT15Measure(MEASURE_HUMI);
lValue_rh = SHT15Read();
// relative humidity calculation
fRh_lin =(C1+(C2*lValue_rh)+(C3*lValue_rh*lValue_rh));
fRh_true =(((Temp-25)*(T1+(T2*lValue_rh)))+fRh_lin);
//send to LCD
lcd_gotoxy(1,2);
printf(lcd_putc,"Temp : %3.2f %cc",Temp,0xDF);
lcd_gotoxy(1,1);
printf(lcd_putc,"Humi : %3.2f %%RH",fRh_true,0xDF);
delay_ms(1000);
}
}
