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https://github.com/firestar5683/StarPilot.git
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firestarsdog
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
#pragma once
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#include "board/drivers/drivers.h"
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struct fan_state_t fan_state;
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static const uint8_t FAN_TICK_FREQ = 8U;
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static const uint8_t FAN_STALL_THRESHOLD_MIN = 3U;
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void fan_set_power(uint8_t percentage) {
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if (percentage > 0U) {
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fan_state.power = CLAMP(percentage, 20U, 100U);
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} else {
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fan_state.power = 0U;
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}
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}
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void fan_init(void) {
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fan_state.stall_threshold = FAN_STALL_THRESHOLD_MIN;
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fan_state.cooldown_counter = current_board->fan_enable_cooldown_time * FAN_TICK_FREQ;
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llfan_init();
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}
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// Call this at FAN_TICK_FREQ
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void fan_tick(void) {
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if (current_board->has_fan) {
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// Measure fan RPM
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uint16_t fan_rpm_fast = fan_state.tach_counter * (60U * FAN_TICK_FREQ / 4U); // 4 interrupts per rotation
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fan_state.tach_counter = 0U;
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fan_state.rpm = (fan_rpm_fast + (3U * fan_state.rpm)) / 4U;
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bool fan_stalled = false;
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if (current_board->fan_stall_recovery) {
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if (fan_state.power > 0U) {
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fan_state.stall_counter = (fan_rpm_fast == 0U) ? MIN(fan_state.stall_counter + 1U, 254U) : 0U;
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if (fan_state.stall_counter > (fan_state.stall_threshold * FAN_TICK_FREQ)) {
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fan_stalled = true;
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fan_state.stall_counter = 0U;
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fan_state.stall_threshold = CLAMP(fan_state.stall_threshold + 2U, FAN_STALL_THRESHOLD_MIN, 8U);
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}
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} else {
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fan_state.stall_counter = 0U;
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fan_state.stall_threshold = FAN_STALL_THRESHOLD_MIN;
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}
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}
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// Cooldown counter to prevent noise on tachometer line.
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if (fan_state.power > 0U) {
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fan_state.cooldown_counter = current_board->fan_enable_cooldown_time * FAN_TICK_FREQ;
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} else {
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if (fan_state.cooldown_counter > 0U) {
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fan_state.cooldown_counter--;
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}
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}
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// Set PWM and enable line
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pwm_set(TIM3, 3, fan_state.power);
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// A one-tick disable resets the tici fan driver even while cooldown is active.
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current_board->set_fan_enabled(!fan_stalled && ((fan_state.power > 0U) || (fan_state.cooldown_counter > 0U)));
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}
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}
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