sascha/esphome
1
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2025-10-23 04:03:52 +01:00
Code Issues Releases Wiki Activity

Added support for ADS1015 (#4281)

Browse Source 
Co-authored-by: vilrexa-at-412611259294 <pdzBdl8EkgUikpOWsRCKzTVHMEX2wLnZJRdLhK38oNk=>
This commit is contained in:
WitchKing
2023-01-26 05:20:45 +01:00
committed by GitHub
parent e778a445d9
commit aca56fcdcc
3 changed files with 48 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
esphome/components/ads1115/ads1115.cpp
View File

@@ -9,7 +9,7 @@ static const char *const TAG = "ads1115";
static const uint8_t ADS1115_REGISTER_CONVERSION = 0x00;
static const uint8_t ADS1115_REGISTER_CONFIG = 0x01;
static const uint8_t ADS1115_DATA_RATE_860_SPS = 0b111;
static const uint8_t ADS1115_DATA_RATE_860_SPS = 0b111; // 3300_SPS for ADS1015
void ADS1115Component::setup() {
ESP_LOGCONFIG(TAG, "Setting up ADS1115...");
@@ -18,6 +18,9 @@ void ADS1115Component::setup() {
this->mark_failed();
return;
}
ESP_LOGCONFIG(TAG, "Configuring ADS1115...");
uint16_t config = 0;
// Clear single-shot bit
// 0b0xxxxxxxxxxxxxxx
@@ -77,6 +80,7 @@ void ADS1115Component::dump_config() {
LOG_SENSOR(" ", "Sensor", sensor);
ESP_LOGCONFIG(TAG, " Multiplexer: %u", sensor->get_multiplexer());
ESP_LOGCONFIG(TAG, " Gain: %u", sensor->get_gain());
ESP_LOGCONFIG(TAG, " Resolution: %u", sensor->get_resolution());
}
}
float ADS1115Component::request_measurement(ADS1115Sensor *sensor) {
@@ -127,27 +131,45 @@ float ADS1115Component::request_measurement(ADS1115Sensor *sensor) {
this->status_set_warning();
return NAN;
}
if (sensor->get_resolution() == ADS1015_12_BITS) {
bool negative = (raw_conversion >> 15) == 1;
// shift raw_conversion as it's only 12-bits, left justified
raw_conversion = raw_conversion >> (16 - ADS1015_12_BITS);
// check if number was negative in order to keep the sign
if (negative) {
// the number was negative
// 1) set the negative bit back
raw_conversion |= 0x8000;
// 2) reset the former (shifted) negative bit
raw_conversion &= 0xF7FF;
}
}
auto signed_conversion = static_cast<int16_t>(raw_conversion);
float millivolts;
float divider = (sensor->get_resolution() == ADS1115_16_BITS) ? 32768.0f : 2048.0f;
switch (sensor->get_gain()) {
case ADS1115_GAIN_6P144:
millivolts = signed_conversion * 0.187500f;
millivolts = (signed_conversion * 6144) / divider;
break;
case ADS1115_GAIN_4P096:
millivolts = signed_conversion * 0.125000f;
millivolts = (signed_conversion * 4096) / divider;
break;
case ADS1115_GAIN_2P048:
millivolts = signed_conversion * 0.062500f;
millivolts = (signed_conversion * 2048) / divider;
break;
case ADS1115_GAIN_1P024:
millivolts = signed_conversion * 0.031250f;
millivolts = (signed_conversion * 1024) / divider;
break;
case ADS1115_GAIN_0P512:
millivolts = signed_conversion * 0.015625f;
millivolts = (signed_conversion * 512) / divider;
break;
case ADS1115_GAIN_0P256:
millivolts = signed_conversion * 0.007813f;
millivolts = (signed_conversion * 256) / divider;
break;
default:
millivolts = NAN;