o: ActiveSupport::Cache::Entry :@compressedF: @value"L"L
main.c
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/*
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SHT25  sensor demo firmware
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*/
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#include "main.h"


  		




  
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#include "SHT25.h"


  		




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void SHT25_soft_reset()


  		




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{


  		




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  i2c_start();     // Start condition


  		




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  i2c_write(0x80); // Device address


  		




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  i2c_write(0xFE);    // Device command


  		




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  i2c_stop();      // Stop condition


  		




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}


  		




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#define SHT25_HEATER_ON   0x04 


  		




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#define SHT25_HEATER_OFF   0x00


  		




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#define SHT25_OTP_reload_off  0x02


  		




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#define SHT25_RH12_T14  0x00


  		




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#define SHT25_RH8_T12  0x01


  		




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#define SHT25_RH10_T13  0x80


  		




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#define SHT25_RH11_T11  0x81


  		




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#define SHT25_ADDR  0x80


  		




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unsigned int8 SHT25_setup(unsigned int8 setup_reg )  // writes to status register and returns its value


  		




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{


  		




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unsigned int8 reg;


  		




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  i2c_start();     // Start condition


  		




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  i2c_write(SHT25_ADDR); // Device address


  		




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  i2c_write(0xE7);    // Device command


  		




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  i2c_start();     // Start condition


  		




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  i2c_write(SHT25_ADDR+1); // Device address


  		




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  reg=i2c_read(0);    // Read status actual status register


  		




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  reg = (reg & 0x3A) | setup_reg;


  		




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  i2c_start();     // Start condition


  		




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  i2c_write(SHT25_ADDR); // Device address


  		




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  i2c_write(0xE7);    // Write to status register


  		




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  i2c_write(reg);    // Device command


  		




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  i2c_stop();      // Stop condition


  		




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  return (reg);


  		




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}


  		




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float SHT25_get_temp()


  		




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{


  		




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unsigned int8 MSB, LSB, Check;


  		




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unsigned int16 data;


  		




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   i2c_start();


  		




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   I2C_Write(SHT25_ADDR);


  		




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   I2C_write(0xE3);


  		




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   i2c_stop();


  		




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   delay_ms(100);


  		




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   i2c_start();


  		




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   I2C_Write(SHT25_ADDR+1);


  		




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   MSB=i2c_read(1);


  		




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   LSB=i2c_read(1);


  		




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   Check=i2c_read(0);


  		




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   i2c_stop();


  		




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   LSB = LSB >> 2; // trow out status bits


  		




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   data = (((unsigned int16) MSB << 8) + (LSB << 4));


  		




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   return(-46.85 + 175.72*((float)data/0xFFFF));


  		




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}


  		




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float SHT25_get_hum()


  		




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{


  		




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unsigned int8 MSB, LSB, Check;


  		




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unsigned int16 data;


  		




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   i2c_start();   //RH


  		




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   I2C_Write(SHT25_ADDR);


  		




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   I2C_write(0xE5);


  		




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//   i2c_stop();


  		




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   delay_ms(100);


  		




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   i2c_start();


  		




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   I2C_Write(SHT25_ADDR+1);


  		




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   MSB=i2c_read(1);


  		




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   LSB=i2c_read(1);


  		




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   Check=i2c_read(0);


  		




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   i2c_stop(); 


  		




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//   printf("%X %X  %X\r\n",MSB, LSB, Check);   


  		




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   LSB = LSB >> 2; // trow out status bits


  		




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   data = (((unsigned int16) MSB << 8) + (LSB << 4) );


  		




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   return( -6.0 + 125.0*((float)data/0xFFFF));


  		




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}      


  		




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void main()


  		




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{


  		




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unsigned int8 i=0;


  		




  
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unsigned int8 i=0, sht_config;


  		




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   setup_adc_ports(NO_ANALOGS|VSS_VDD);


  		




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   setup_adc(ADC_CLOCK_DIV_2);


  		




  ......




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  while(TRUE)


  		




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  { 


  		




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   if (i<10) 


  		




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   printf("setup: %X \r\n",SHT25_setup(SHT25_RH12_T14 | SHT25_HEATER_OFF));


  		




  
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   if (i<10) sht_config = SHT25_RH12_T14 | SHT25_HEATER_OFF; // loop alters on chip heater on and off to check correct function


  		




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   else


  		




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   {


  		




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      printf("setup: %X \r\n",SHT25_setup(SHT25_RH12_T14 | SHT25_HEATER_ON));


  		




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      i = 0;


  		




  
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      sht_config = SHT25_RH12_T14 | SHT25_HEATER_ON;


  		




  
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      if (i > 20) i = 0;


  		




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   }


  		




  
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      printf("setup: %X %X \r\n",SHT25_setup(sht_config),sht_config);


  		




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      delay_ms (500);


  		




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      printf("Temp: %f \r\n",SHT25_get_temp());      


  		




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      delay_ms (500);


  		










:@created_atf1436892575.940053):@expires_in0