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Fix formula for automatic fan control and adjust minimum fan speed (#59)

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* Fix formula for the automatic fan control
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ozbibi 2023-11-25 15:38:50 +11:00 committed by GitHub
parent 308991f80c
commit 7abda9914c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 5 deletions
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13
main/tasks/power_management_task.c
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@ -143,20 +143,23 @@ void POWER_MANAGEMENT_task(void * pvParameters)
}
}
// all values input below 60 result in 38 but increases exponentially such that an input of 70 results in 100
// Set the fan speed between 20% min and 100% max based on chip temperature as input.
// The fan speed increases from 20% to 100% proportionally to the temperature increase from 50 and THROTTLE_TEMP
static void automatic_fan_speed(float chip_temp)
{
double result = 0.0;
double min_temp = 50.0;
double min_fan_speed = 20.0;
if (chip_temp < min_temp) {
result = 25;
result = min_fan_speed;
} else if (chip_temp >= THROTTLE_TEMP) {
result = 100;
} else {
double range = THROTTLE_TEMP - min_temp;
result = ((chip_temp - min_temp) / range) * 100;
double temp_range = THROTTLE_TEMP - min_temp;
double fan_range = 100 - min_fan_speed;
result = ((chip_temp - min_temp) / temp_range) * fan_range + min_fan_speed;
}
EMC2101_set_fan_speed((float) result / 100);
}
}