ADS1115

ADS1115 is a 16bits Analog to Digital Converter

The ADS1115 is a 4-Channel Analog to Digital Converter

this lib is ADS1115 drive for stm32f103

how to use it ?

you only to add the bsp_ads1115.c and bsp_ads1115.h to keil5 Project

then Init in the main function, and use GetAds1115Values function to get adc values,

for eg, use printf to show data in Serial port . and you can see there is anything else! 0.125???

int main()
{ 
  printf_init();    
  ads1115_Init();
  while (1)
  {
    printf("%f\r\n",GetAds1115Values()*0.125);
  }
}

why adc values Multiply 0.125?

the ads1115 has vref insdide chip ,so we don’t like others Converter use “ 3.3/4096”

the values from GetAds1115Values function is inside values ,if it Multiply gain_coefficient t,then the realValues is coming !

you can change it in bsp_ads1115.c

this list is GAIN with GAIN_COEFFICIENT

typedef enum
{
  GAIN_TWOTHIRDS    = ADS1015_REG_CONFIG_PGA_6_144V,  // 0.1875mV
  GAIN_ONE          = ADS1015_REG_CONFIG_PGA_4_096V,  // 0.125mV
  GAIN_TWO          = ADS1015_REG_CONFIG_PGA_2_048V,  // 0.0625mV
  GAIN_FOUR         = ADS1015_REG_CONFIG_PGA_1_024V,  // 0.03125mV
  GAIN_EIGHT        = ADS1015_REG_CONFIG_PGA_0_512V,  // 0.015625mV
  GAIN_SIXTEEN      = ADS1015_REG_CONFIG_PGA_0_256V  //  0.0078125mV
} adsGain_t;