--- In AVR-Chat@yahoogroups.com, Ardian sandy <ardi_sandi302@...> wrote:
>
>
>
> this my code jim....
>
>
> /*****************************************************
> This program was produced by the
> CodeWizardAVR V1.24.2b Professional
> Automatic Program Generator
> © Copyright 1998-2004 Pavel Haiduc, HP InfoTech s.r.l.
> http://www.hpinfotech.ro
> e-mail:office@...
>
> Project : Monitoring humidity and temperatur
> Version : 0.0
> Date : 3/11/2009
> Author : Ardi
> Company :
> Comments:
>
>
> Chip type : ATmega8535
> Program type : Application
> Clock frequency : 11.059200 MHz
> Memory model : Small
> External SRAM size : 0
> Data Stack size : 128
> *****************************************************/
>
> #include <mega8535.h>
> #include <stdio.h>
> #include <math.h>
> #include <delay.h>
> #include <stdlib.h>
> // I2C Bus functions
> #asm
> .equ __i2c_port=0x18 ;PORTB
> .equ __sda_bit=1
> .equ __scl_bit=2
> #endasm
> #include <i2c.h>
>
> // DS1307 Real Time Clock functions
> #include <ds1307.h>
>
> // Alphanumeric LCD Module functions
> #asm
> .equ __lcd_port=0x15 ;PORTC
> #endasm
> #include <lcd.h>
>
> #define RXB8 1
> #define TXB8 0
> #define UPE 2
> #define OVR 3
> #define FE 4
> #define UDRE 5
> #define RXC 7
>
> #define FRAMING_ERROR (1<<FE)
> #define PARITY_ERROR (1<<UPE)
> #define DATA_OVERRUN (1<<OVR)
> #define DATA_REGISTER_EMPTY (1<<UDRE)
> #define RX_COMPLETE (1<<RXC)
>
> // Get a character from the USART Receiver
> #ifndef _DEBUG_TERMINAL_IO_
> #define _ALTERNATE_GETCHAR_
> #pragma used+
> char getchar(void)
> {
> char status,data;
> while (1)
> {
> while (((status=UCSRA) & RX_COMPLETE)==0);
> data=UDR;
> if ((status & (FRAMING_ERROR | PARITY_ERROR | DATA_OVERRUN))==0)
> return data;
> };
> }
> #pragma used-
> #endif
>
> // Write a character to the USART Transmitter
> #ifndef _DEBUG_TERMINAL_IO_
> #define _ALTERNATE_PUTCHAR_
> #pragma used+
> void putchar(char c)
> {
> while ((UCSRA & DATA_REGISTER_EMPTY)==0);
> UDR=c;
> }
> #pragma used-
> #endif
>
> // Declare your global variables here
> typedef union
> { unsigned int i; float f;} value;
>
>
> enum {TEMP,HUMI};
>
> sfrb PIND = 0x10;
> sfrb PORTD = 0x12;
> sfrb DDRD = 0x11;
>
> #define SHT_DATA_OUT DDRD.2
> #define SHT_DATA_IN PIND.2
> #define SHT_SCK PORTD.3
> #define HEAT_SW PIND.4 // Heater On or Off
> #define noACK 0
> #define ACK 1
> //adr command r/w
> #define STATUS_REG_W 0x06 //000 0011 0
> #define STATUS_REG_R 0x07 //000 0011 1
> #define MEASURE_TEMP 0x03 //000 0001 1
> #define MEASURE_HUMI 0x05 //000 0010 1
> #define RESET 0x1e //000 1111 0
>
> const float C1=-4.0; // for 12 Bit
> const float C2=+0.0405; // for 12 Bit
> const float C3=-0.0000028; // for 12 Bit
> const float T1=+0.01; // for 14 Bit @ 5V
> const float T2=+0.00008; // for 14 Bit @ 5V
>
>
> char lcd_buffer[33];
>
>
> //SHT Functions
> char SHT_WriteByte(unsigned char value);
> char SHT_ReadByte(unsigned char ack);
> void s_transstart(void);
> void s_connectionreset(void);
> char s_softreset(void);
> char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode);
> void calc_sth11(float *p_humidity ,float *p_temperature);
> float calc_dewpoint(float h,float t);
> char s_write_statusreg(unsigned char *p_value);
> char s_read_statusreg(unsigned char *p_value, unsigned char *p_checksum);
> unsigned char h,m,s;
>
>
> void main(void)
> {
> // Declare your local variables here
> value humi_val, temp_val;
> unsigned char error,checksum;
> float dew_point;
> delay_ms(200);
> s_connectionreset();
>
>
>
> // Input/Output Ports initialization
> // Port A initialization
> // Func7=In Func6=In Func5=In Func4=In Func3=Out Func2=Out Func1=Out Func0=Out
> // State7=T State6=T State5=T State4=T State3=0 State2=0 State1=0 State0=0
> PORTA=0x00;
> DDRA=0x0F;
>
> // Port B initialization
> // Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=Out
> // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=0
> PORTB=0x00;
> DDRB=0x01;
>
> // Port C initialization
> // Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
> // State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
> PORTC=0x00;
> DDRC=0x00;
>
> // Port D initialization
> // Func7=In Func6=In Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=In
> // State7=T State6=T State5=0 State4=0 State3=T State2=T State1=T State0=T
> PORTD=0x00;
> DDRD=0x34;
>
> // Timer/Counter 0 initialization
> // Clock source: System Clock
> // Clock value: Timer 0 Stopped
> // Mode: Normal top=FFh
> // OC0 output: Disconnected
> TCCR0=0x00;
> TCNT0=0x00;
> OCR0=0x00;
>
> // Timer/Counter 1 initialization
> // Clock source: System Clock
> // Clock value: Timer 1 Stopped
> // Mode: Normal top=FFFFh
> // OC1A output: Discon.
> // OC1B output: Discon.
> // Noise Canceler: Off
> // Input Capture on Falling Edge
> TCCR1A=0x00;
> TCCR1B=0x00;
> TCNT1H=0x00;
> TCNT1L=0x00;
> ICR1H=0x00;
> ICR1L=0x00;
> OCR1AH=0x00;
> OCR1AL=0x00;
> OCR1BH=0x00;
> OCR1BL=0x00;
>
> // Timer/Counter 2 initialization
> // Clock source: System Clock
> // Clock value: Timer 2 Stopped
> // Mode: Normal top=FFh
> // OC2 output: Disconnected
> ASSR=0x00;
> TCCR2=0x00;
> TCNT2=0x00;
> OCR2=0x00;
>
> // External Interrupt(s) initialization
> // INT0: Off
> // INT1: Off
> // INT2: Off
> MCUCR=0x00;
> MCUCSR=0x00;
>
> // Timer(s)/Counter(s) Interrupt(s) initialization
> TIMSK=0x00;
>
> // USART initialization
> // Communication Parameters: 8 Data, 2 Stop, No Parity
> // USART Receiver: On
> // USART Transmitter: On
> // USART Mode: Asynchronous
> // USART Baud rate: 19200
> UCSRA=0x00;
> UCSRB=0x18;
> UCSRC=0x8E;
> UBRRH=0x00;
> UBRRL=0x23;
>
> // Analog Comparator initialization
> // Analog Comparator: Off
> // Analog Comparator Input Capture by Timer/Counter 1: Off
> // Analog Comparator Output: Off
> ACSR=0x80;
> SFIOR=0x00;
>
> // I2C Bus initialization
> i2c_init();
> delay_ms(250);
> // DS1307 Real Time Clock initialization
> // Square wave output on pin SQW/OUT: Off
> // SQW/OUT pin state: 0
> rtc_init(0,0,0);
> rtc_set_date(14,03,2009);
> rtc_set_time(19,05,01);
>
> // LCD module initialization
> lcd_init(20);
>
> // Setup Sensibus Pins
>
> PORTD.3 = 0; // ClockLow
> DDRD.3 = 1; // SCK is an output
> PORTD.2 = 0; // Always Zero
> // Toggle DDRD.2 for Data
>
> /*
> while (1)
> {
> s_transstart(); //transmission start
>
> error+=SHT_WriteByte(MEASURE_TEMP); //send command to sensor
>
> for (i=0;i<65535;i++)
> if(SHT_DATA_IN==0) break; //wait until sensor has finished the measurement
>
> if(SHT_DATA_IN) error+=1; //or timeout (~2 sec.) is reached
>
> MSB =SHT_ReadByte(ACK); //read the first byte (MSB)
> LSB =SHT_ReadByte(ACK); //read the second byte (LSB)
> checksum =SHT_ReadByte(noACK); //read checksum
>
> sprintf(lcd_buffer,"T= %u %u %u",MSB,LSB,checksum);
> lcd_gotoxy(0,1);
> lcd_puts(lcd_buffer);
>
> delay_ms(500);
> }
> */
>
> while (1)
> {
> error=0;
> error+=s_measure((unsigned char*) &humi_val.i,&checksum,HUMI);
> error+=s_measure((unsigned char*) &temp_val.i,&checksum,TEMP);
> error=0;
> if(error!=0)
> s_connectionreset();
> else{
> humi_val.f=(float)humi_val.i; //converts integer to float
> temp_val.f=(float)temp_val.i; //converts integer to float
> calc_sth11(&humi_val.f,&temp_val.f); //calculate humidity, temperature
> dew_point=calc_dewpoint(humi_val.f,temp_val.f); //calculate dew point
> sprintf(lcd_buffer,"T:%3.1fC RH:%3.1f%%",temp_val.f,humi_val.f);
> lcd_gotoxy(0,0);
> lcd_puts(lcd_buffer);
>
> rtc_get_time(&h,&m,&s) ;
> lcd_gotoxy(0,1);
> sprintf(lcd_buffer,"%i:%i:%i",h,m,s);
> lcd_puts(lcd_buffer);
> }
> // Global enable interrupts
> #asm("sei")
> delay_ms(1000);
> #asm("cli")
> }
> }
>
> //----------------------------------------------------------------------------------
> // writes a byte on the Sensibus and checks the acknowledge
> //----------------------------------------------------------------------------------
> char SHT_WriteByte(unsigned char value)
> {
> unsigned char i,error=0;
> for (i=0x80;i>0;i/=2) //shift bit for masking
> {
> if (i & value) SHT_DATA_OUT=0; //masking value with i , write to SENSI-BUS
> else SHT_DATA_OUT=1;
> SHT_SCK=1; //clk for SENSI-BUS
> delay_us(5); //pulswith approx. 5 us
> SHT_SCK=0;
> }
> SHT_DATA_OUT=0; //release DATA-line
> SHT_SCK=1; //clk #9 for ack
> error=SHT_DATA_IN; //check ack (DATA will be pulled down by SHT11)
> SHT_SCK=0;
> return error; //error=1 in case of no acknowledge
> }
>
> //----------------------------------------------------------------------------------
> // reads a byte form the Sensibus and gives an acknowledge in case of "ack=1"
> //----------------------------------------------------------------------------------
> char SHT_ReadByte(unsigned char ack)
> {
> unsigned char i,val=0;
> SHT_DATA_OUT=0; //release DATA-line
> for (i=0x80;i>0;i/=2) //shift bit for masking
> {
> SHT_SCK=1; //clk for SENSI-BUS
> if (SHT_DATA_IN) val=(val | i); //read bit
> SHT_SCK=0;
> }
> SHT_DATA_OUT=ack; //in case of "ack==1" pull down DATA-Line
> SHT_SCK=1; //clk #9 for ack
> delay_us(5); //pulswith approx. 5 us
> SHT_SCK=0;
> SHT_DATA_OUT=0; //release DATA-line
> return val;
> }
>
> //----------------------------------------------------------------------------------
> // generates a transmission start
> // _____ ________
> // DATA: |_______|
> // ___ ___
> // SCK : ___| |___| |______
> //----------------------------------------------------------------------------------
> void s_transstart(void)
> {
> SHT_DATA_OUT=0;
> SHT_SCK=0; //Initial state
> delay_us(1);
> SHT_SCK=1;
> delay_us(1);
> SHT_DATA_OUT=1;
> delay_us(1);
> SHT_SCK=0;
> delay_us(5);
> SHT_SCK=1;
> delay_us(1);
> SHT_DATA_OUT=0;
> delay_us(1);
> SHT_SCK=0;
> }
>
> //----------------------------------------------------------------------------------
> // communication reset: DATA-line=1 and at least 9 SCK cycles followed by transstart
> // _____________________________________________________ ________
> // DATA: |_______|
> // _ _ _ _ _ _ _ _ _ ___ ___
> // SCK : __| |__| |__| |__| |__| |__| |__| |__| |__| |______| |___| |______
> //----------------------------------------------------------------------------------
>
> void s_connectionreset(void)
> {
> unsigned char i;
> SHT_DATA_OUT=0; SHT_SCK=0; //Initial state
> for(i=0;i<9;i++) //9 SCK cycles
> {
> SHT_SCK=1;
> delay_us(1);
> SHT_SCK=0;
> }
> s_transstart(); //transmission start
> }
>
> //----------------------------------------------------------------------------------
> // resets the sensor by a softreset
> //----------------------------------------------------------------------------------
>
> char s_softreset(void)
> {
> unsigned char error=0;
> s_connectionreset(); //reset communication
> error+=SHT_WriteByte(RESET); //send RESET-command to sensor
> return error; //error=1 in case of no response form the sensor
> }
>
> //----------------------------------------------------------------------------------
> // makes a measurement (humidity/temperature) with checksum
> //----------------------------------------------------------------------------------
> char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode)
> {
> unsigned error=0;
> unsigned int i;
>
> s_transstart(); //transmission start
> switch(mode){ //send command to sensor
> case TEMP : error+=SHT_WriteByte(MEASURE_TEMP); break;
> case HUMI : error+=SHT_WriteByte(MEASURE_HUMI); break;
> default : break;
> }
> for (i=0;i<65535;i++) if(SHT_DATA_IN==0) break; //wait until sensor has finished the measurement
> if(SHT_DATA_IN) error+=1; // or timeout (~2 sec.) is reached
> *(p_value+1) =SHT_ReadByte(ACK); //read the first byte (MSB)
> *(p_value) =SHT_ReadByte(ACK); //read the second byte (LSB)
> *p_checksum =SHT_ReadByte(noACK); //read checksum
> return error;
> }
>
> //----------------------------------------------------------------------------------------
> // calculates temperature [°C] and humidity [%RH]
> // input : humi [Ticks] (12 bit)
> // temp [Ticks] (14 bit)
> // output: humi [%RH]
> // temp [°C]
> //----------------------------------------------------------------------------------------
>
> void calc_sth11(float *p_humidity ,float *p_temperature)
> {
>
> //float rh=*p_humidity; // rh: Humidity [Ticks] 12 Bit
> //float t=*p_temperature; // t: Temperature [Ticks] 14 Bit
> float rh_lin; // rh_lin: Humidity linear
> float rh_true; // rh_true: Temperature compensated humidity
> float t_C; // t_C : Temperature [°C]
>
> t_C=*p_temperature*0.01 - 40; //calc. temperature from ticks to [°C]
> rh_lin=C3*(*p_humidity)*(*p_humidity) + C2*(*p_humidity) + C1; //calc. humidity from ticks to [%RH]
> rh_true=(t_C-25)*(T1+T2*(*p_humidity))+rh_lin; //calc. temperature compensated humidity [%RH]
> if(rh_true>100)rh_true=100; //cut if the value is outside of
> if(rh_true<0.1)rh_true=0.1; //the physical possible range
>
> *p_temperature=t_C; //return temperature [°C]
> *p_humidity=rh_true; //return humidity[%RH]
> }
>
> //--------------------------------------------------------------------
> // calculates dew point
> // input: humidity [%RH], temperature [°C]
> // output: dew point [°C]
> //--------------------------------------------------------------------
>
> float calc_dewpoint(float h,float t)
> {
> float logEx,dew_point;
> logEx=0.66077+7.5*t/(237.3+t)+(log10(h)-2);
> dew_point = (logEx - 0.66077)*237.3/(0.66077+7.5-logEx);
> return dew_point;
> }
>
> //----------------------------------------------------------------------------------
> // reads the status register with checksum (8-bit)
> //----------------------------------------------------------------------------------
> char s_read_statusreg(unsigned char *p_value, unsigned char *p_checksum)
> {
> unsigned char error=0;
> s_transstart(); //transmission start
> error=SHT_WriteByte(STATUS_REG_R); //send command to sensor
> *p_value=SHT_ReadByte(ACK); //read status register (8-bit)
> *p_checksum=SHT_ReadByte(noACK); //read checksum (8-bit)
> return error; //error=1 in case of no response form the sensor
> }
>
> //----------------------------------------------------------------------------------
> // writes the status register with checksum (8-bit)
> //----------------------------------------------------------------------------------
> char s_write_statusreg(unsigned char *p_value)
> {
> unsigned char error=0;
> s_transstart(); //transmission start
> error+=SHT_WriteByte(STATUS_REG_W);//send command to sensor
> error+=SHT_WriteByte(*p_value); //send value of status register
> return error; //error>=1 in case of no response form the sensor
> }
>
> Ardian 3oz^
>
>
> Lebih bergaul dan terhubung dengan lebih baik. Tambah lebih banyak teman ke Yahoo! Messenger sekarang! http://id.messenger.yahoo.com/invite/
>
> [Non-text portions of this message have been removed]
>
Instead of your s_transstart(); Try the below code...and also i've some problem with codevisionAVR then switched to WINAVR then i'm able to get the out accurately..
Well ur rest of the code is OK...
All the best.
void s_transstart(void)
> {
> SHT_DATA_OUT=1;
> SHT_SCK=0; //Initial state
> delay_us(1);
> SHT_SCK=1;
> delay_us(1);
> SHT_DATA_OUT=0;
> delay_us(1);
> SHT_SCK=0;
> delay_us(5);
> SHT_SCK=1;
> delay_us(1);
> SHT_DATA_OUT=1;
> delay_us(1);
> SHT_SCK=0;
> }
>Message
Re: Bls: Bls: [AVR-Chat] help me interface atmega8535 ds1307 sht11
2009-03-14 by prkuve