float measures_intTemp(void)
{
sem_obtain(&i2c_sem);
float res = DEG_T_TO_FLOATDEG(lm75_read(&i2c_bus, LM75_ADDR));
sem_release(&i2c_sem);
return res;
}
// read sensor temperature and calculate status/fan speed setting
static void
tempd_read_sensor(struct locl_sensor *sensor)
{
const YamlSensor *yaml_sensor = sensor->yaml_sensor;
if (strcmp(yaml_sensor->type, "lm75") == 0) {
lm75_read(sensor);
} else {
VLOG_WARN("Unrecognized sensor type %s", yaml_sensor->type);
sensor->temp = DEFAULT_TEMP * MILI_DEGREES;
}
// recalculate alarm and fan state
// decreasing alarms
if (SENSOR_STATUS_FAILED == sensor->status) {
// no temp to report, unable to read sensor
return;
}
// adjust min and max values
if (sensor->min > sensor->temp) {
sensor->min = sensor->temp;
}
if (sensor->max < sensor->temp) {
sensor->max = sensor->temp;
}
// decreasing alarms
if (SENSOR_STATUS_EMERGENCY == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->alarm_thresholds.emergency_off) {
sensor->status = SENSOR_STATUS_CRITICAL;
}
if (SENSOR_STATUS_CRITICAL == sensor->status &&
(float)sensor->temp /MILI_DEGREES_FLOAT<= yaml_sensor->alarm_thresholds.critical_off) {
sensor->status = SENSOR_STATUS_MAX;
}
if (SENSOR_STATUS_MAX == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->alarm_thresholds.max_off) {
sensor->status = SENSOR_STATUS_NORMAL;
}
if (SENSOR_STATUS_NORMAL == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT > yaml_sensor->alarm_thresholds.low_crit) {
sensor->status = SENSOR_STATUS_MIN;
}
if (SENSOR_STATUS_MIN == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT > yaml_sensor->alarm_thresholds.min) {
sensor->status = SENSOR_STATUS_NORMAL;
}
// increasing alarms
if (SENSOR_STATUS_NORMAL == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT >= yaml_sensor->alarm_thresholds.max_on) {
sensor->status = SENSOR_STATUS_MAX;
}
if (SENSOR_STATUS_MAX == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT >= yaml_sensor->alarm_thresholds.critical_on) {
sensor->status = SENSOR_STATUS_CRITICAL;
}
if (SENSOR_STATUS_CRITICAL == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT >= yaml_sensor->alarm_thresholds.emergency_on) {
sensor->status = SENSOR_STATUS_EMERGENCY;
}
if (SENSOR_STATUS_NORMAL == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->alarm_thresholds.min) {
sensor->status = SENSOR_STATUS_MIN;
}
if (SENSOR_STATUS_MIN == sensor->status &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->alarm_thresholds.low_crit) {
sensor->status = SENSOR_STATUS_LOWCRIT;
}
// calculate requested fan speed
if (SENSOR_FAN_NORMAL == sensor->fan_speed &&
(float)sensor->temp/MILI_DEGREES_FLOAT >= yaml_sensor->fan_thresholds.medium_on) {
sensor->fan_speed = SENSOR_FAN_MEDIUM;
}
if (SENSOR_FAN_MEDIUM == sensor->fan_speed &&
(float)sensor->temp/MILI_DEGREES_FLOAT >= yaml_sensor->fan_thresholds.fast_on) {
sensor->fan_speed = SENSOR_FAN_FAST;
}
if (SENSOR_FAN_FAST == sensor->fan_speed &&
(float)sensor->temp/MILI_DEGREES_FLOAT >= yaml_sensor->fan_thresholds.max_on) {
sensor->fan_speed = SENSOR_FAN_MAX;
}
if (SENSOR_FAN_MAX == sensor->fan_speed &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->fan_thresholds.max_off) {
sensor->fan_speed = SENSOR_FAN_FAST;
}
if (SENSOR_FAN_FAST == sensor->fan_speed &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->fan_thresholds.fast_off) {
sensor->fan_speed = SENSOR_FAN_MEDIUM;
}
if (SENSOR_FAN_MEDIUM == sensor->fan_speed &&
(float)sensor->temp/MILI_DEGREES_FLOAT <= yaml_sensor->fan_thresholds.medium_off) {
sensor->fan_speed = SENSOR_FAN_NORMAL;
}
}