/Modules/Sensors/SHT25V01A/SW/PIC16F887/main.bak
1,103 → 1,10
#include "main.h"
#include "SHT25.h"
 
void SHT25_soft_reset()
{
i2c_start(); // Start condition
i2c_write(0x80); // Device address
i2c_write(0xFE); // Device command
i2c_stop(); // Stop condition
}
 
#define SHT25_HEATER_ON 0x04
#define SHT25_HEATER_OFF 0x00
#define SHT25_OTP_reload_off 0x02
#define SHT25_RH12_T14 0x00
#define SHT25_RH8_T12 0x01
#define SHT25_RH10_T13 0x80
#define SHT25_RH11_T11 0x81
 
#define SHT25_ADDR 0x80
 
unsigned int8 SHT25_setup(unsigned int8 setup_reg ) // writes to status register and returns its value
{
unsigned int8 reg;
 
i2c_start(); // Start condition
i2c_write(SHT25_ADDR); // Device address
i2c_write(0xE7); // Device command
 
i2c_start(); // Start condition
i2c_write(SHT25_ADDR+1); // Device address
reg=i2c_read(0); // Read status actual status register
 
reg = (reg & 0x3A) | setup_reg;
 
i2c_start(); // Start condition
i2c_write(SHT25_ADDR); // Device address
i2c_write(0xE7); // Write to status register
i2c_write(reg); // Device command
i2c_stop(); // Stop condition
 
return (reg);
}
 
 
float SHT25_get_temp()
{
unsigned int8 MSB, LSB, Check;
unsigned int16 data;
 
i2c_start();
I2C_Write(SHT25_ADDR);
I2C_write(0xE3);
i2c_stop();
delay_ms(100);
i2c_start();
I2C_Write(SHT25_ADDR+1);
MSB=i2c_read(1);
LSB=i2c_read(1);
Check=i2c_read(0);
i2c_stop();
LSB = LSB >> 2; // trow out status bits
 
data = (((unsigned int16) MSB << 8) + (LSB << 4));
return(-46.85 + 175.72*((float)data/0xFFFF));
}
 
float SHT25_get_hum()
{
unsigned int8 MSB, LSB, Check;
unsigned int16 data;
 
i2c_start(); //RH
I2C_Write(SHT25_ADDR);
I2C_write(0xE5);
// i2c_stop();
 
delay_ms(100);
 
i2c_start();
I2C_Write(SHT25_ADDR+1);
MSB=i2c_read(1);
LSB=i2c_read(1);
Check=i2c_read(0);
i2c_stop();
 
// printf("%X %X %X\r\n",MSB, LSB, Check);
 
LSB = LSB >> 2; // trow out status bits
 
data = (((unsigned int16) MSB << 8) + (LSB << 4) );
return( -6.0 + 125.0*((float)data/0xFFFF));
}
 
 
void main()
{
unsigned int8 i=0;
unsigned int8 i=0, sht_config;
 
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_CLOCK_DIV_2);
114,13 → 21,13
 
while(TRUE)
{
if (TRUE)
printf("setup: %X \r\n",SHT25_setup(SHT25_RH12_T14 | SHT25_HEATER_OFF));
if (i<10) sht_config = SHT25_RH12_T14 | SHT25_HEATER_OFF; // loop alters on chip heater on and off to check correct function
else
{
printf("setup: %X \r\n",SHT25_setup(SHT25_RH12_T14 | SHT25_HEATER_ON));
i = 0;
sht_config = SHT25_RH12_T14 | SHT25_HEATER_ON;
if (i > 20) i = 0;
}
printf("setup: %X %X \r\n",SHT25_setup(sht_config),sht_config);
delay_ms (500);
printf("Temp: %f \r\n",SHT25_get_temp());
delay_ms (500);