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Make the fan control on the avalon a simple PID controller with a target temperature of 45.

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This commit is contained in:
Con Kolivas 2013-06-24 10:38:47 +10:00
parent a7f9bf3c52
commit 6cc09aa1e9
2 changed files with 49 additions and 9 deletions
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56
driver-avalon.c
View File

@ -984,22 +984,60 @@ static inline void record_temp_fan(struct avalon_info *info, struct avalon_resul
info->temp_max = info->temp2; info->temp_max = info->temp2;
} }
static void temp_rise(struct avalon_info *info, int temp)
{
if (temp >= AVALON_TEMP_TARGET + AVALON_TEMP_HYSTERESIS * 3) {
info->fan_pwm = AVALON_DEFAULT_FAN_MAX_PWM;
return;
}
if (temp >= AVALON_TEMP_TARGET + AVALON_TEMP_HYSTERESIS * 2)
info->fan_pwm += 10;
else if (temp > AVALON_TEMP_TARGET)
info->fan_pwm += 5;
else if (temp >= AVALON_TEMP_TARGET - AVALON_TEMP_HYSTERESIS)
info->fan_pwm += 1;
else
return;
if (info->fan_pwm > AVALON_DEFAULT_FAN_MAX_PWM)
info->fan_pwm = AVALON_DEFAULT_FAN_MAX_PWM;
}
static void temp_drop(struct avalon_info *info, int temp)
{
if (temp <= AVALON_TEMP_TARGET - AVALON_TEMP_HYSTERESIS * 3) {
info->fan_pwm = AVALON_DEFAULT_FAN_MIN_PWM;
return;
}
if (temp <= AVALON_TEMP_TARGET - AVALON_TEMP_HYSTERESIS * 2)
info->fan_pwm -= 10;
else if (temp <= AVALON_TEMP_TARGET - AVALON_TEMP_HYSTERESIS)
info->fan_pwm -= 5;
else if (temp < AVALON_TEMP_TARGET)
info->fan_pwm -= 1;
if (info->fan_pwm < AVALON_DEFAULT_FAN_MIN_PWM)
info->fan_pwm = AVALON_DEFAULT_FAN_MIN_PWM;
}
static inline void adjust_fan(struct avalon_info *info) static inline void adjust_fan(struct avalon_info *info)
{ {
int temp_new; int temp_new;
temp_new = info->temp_sum / info->temp_history_count; temp_new = info->temp_sum / info->temp_history_count;
if (temp_new < 35) { if (temp_new > info->temp_old)
info->fan_pwm = AVALON_DEFAULT_FAN_MIN_PWM; temp_rise(info, temp_new);
info->temp_old = temp_new; else if (temp_new < info->temp_old)
} else if (temp_new > 55) { temp_drop(info, temp_new);
info->fan_pwm = AVALON_DEFAULT_FAN_MAX_PWM; else {
info->temp_old = temp_new; /* temp_new == info->temp_old */
} else if (abs(temp_new - info->temp_old) >= 2) { if (temp_new > AVALON_TEMP_TARGET)
info->fan_pwm = AVALON_DEFAULT_FAN_MIN_PWM + (temp_new - 35) * 6.4; temp_rise(info, temp_new);
info->temp_old = temp_new; else if (temp_new < AVALON_TEMP_TARGET - AVALON_TEMP_HYSTERESIS)
temp_drop(info, temp_new);
} }
info->temp_old = temp_new;
} }
static void avalon_update_temps(struct cgpu_info *avalon, struct avalon_info *info, static void avalon_update_temps(struct cgpu_info *avalon, struct avalon_info *info,

2
driver-avalon.h
View File

@ -25,6 +25,8 @@
#define AVALON_FAN_FACTOR 120 #define AVALON_FAN_FACTOR 120
#define AVALON_DEFAULT_FAN_MAX_PWM 0xA0 /* 100% */ #define AVALON_DEFAULT_FAN_MAX_PWM 0xA0 /* 100% */
#define AVALON_DEFAULT_FAN_MIN_PWM 0x20 /* 20% */ #define AVALON_DEFAULT_FAN_MIN_PWM 0x20 /* 20% */
#define AVALON_TEMP_TARGET 45
#define AVALON_TEMP_HYSTERESIS 3
#define AVALON_DEFAULT_TIMEOUT 0x2D #define AVALON_DEFAULT_TIMEOUT 0x2D
#define AVALON_DEFAULT_FREQUENCY 282 #define AVALON_DEFAULT_FREQUENCY 282