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+/**
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+ * Marlin 3D Printer Firmware
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+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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+ *
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+ * Based on Sprinter and grbl.
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+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation, either version 3 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
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+ *
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+ */
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+
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+/**
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+ * fancheck.cpp - fan tachometer check
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+ */
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+
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+#include "../inc/MarlinConfig.h"
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+
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+#if HAS_FANCHECK
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+
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+#include "fancheck.h"
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+#include "../module/temperature.h"
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+
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+#if HAS_AUTO_FAN && EXTRUDER_AUTO_FAN_SPEED != 255 && DISABLED(FOURWIRES_FANS)
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+ bool FanCheck::measuring = false;
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+#endif
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+bool FanCheck::tacho_state[TACHO_COUNT];
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+uint16_t FanCheck::edge_counter[TACHO_COUNT];
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+uint8_t FanCheck::rps[TACHO_COUNT];
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+FanCheck::TachoError FanCheck::error = FanCheck::TachoError::NONE;
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+bool FanCheck::enabled;
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+
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+void FanCheck::init() {
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+ #define _TACHINIT(N) TERN(E##N##_FAN_TACHO_PULLUP, SET_INPUT_PULLUP, TERN(E##N##_FAN_TACHO_PULLDOWN, SET_INPUT_PULLDOWN, SET_INPUT))(E##N##_FAN_TACHO_PIN)
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+ #if HAS_E0_FAN_TACHO
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+ _TACHINIT(0);
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+ #endif
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+ #if HAS_E1_FAN_TACHO
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+ _TACHINIT(1);
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+ #endif
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+ #if HAS_E2_FAN_TACHO
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+ _TACHINIT(2);
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+ #endif
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+ #if HAS_E3_FAN_TACHO
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+ _TACHINIT(3);
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+ #endif
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+ #if HAS_E4_FAN_TACHO
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+ _TACHINIT(4);
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+ #endif
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+ #if HAS_E5_FAN_TACHO
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+ _TACHINIT(5);
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+ #endif
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+ #if HAS_E6_FAN_TACHO
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+ _TACHINIT(6);
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+ #endif
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+ #if HAS_E7_FAN_TACHO
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+ _TACHINIT(7);
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+ #endif
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+}
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+
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+void FanCheck::update_tachometers() {
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+ bool status;
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+
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+ #define _TACHO_CASE(N) case N: status = READ(E##N##_FAN_TACHO_PIN); break;
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+ LOOP_L_N(f, TACHO_COUNT) {
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+ switch (f) {
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+ #if HAS_E0_FAN_TACHO
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+ _TACHO_CASE(0)
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+ #endif
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+ #if HAS_E1_FAN_TACHO
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+ _TACHO_CASE(1)
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+ #endif
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+ #if HAS_E2_FAN_TACHO
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+ _TACHO_CASE(2)
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+ #endif
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+ #if HAS_E3_FAN_TACHO
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+ _TACHO_CASE(3)
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+ #endif
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+ #if HAS_E4_FAN_TACHO
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+ _TACHO_CASE(4)
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+ #endif
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+ #if HAS_E5_FAN_TACHO
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+ _TACHO_CASE(5)
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+ #endif
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+ #if HAS_E6_FAN_TACHO
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+ _TACHO_CASE(6)
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+ #endif
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+ #if HAS_E7_FAN_TACHO
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+ _TACHO_CASE(7)
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+ #endif
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+ default: continue;
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+ }
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+
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+ if (status != tacho_state[f]) {
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+ if (measuring) ++edge_counter[f];
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+ tacho_state[f] = status;
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+ }
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+ }
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+}
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+
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+void FanCheck::compute_speed(uint16_t elapsedTime) {
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+ static uint8_t errors_count[TACHO_COUNT];
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+ static uint8_t fan_reported_errors_msk = 0;
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+
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+ uint8_t fan_error_msk = 0;
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+ LOOP_L_N(f, TACHO_COUNT) {
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+ switch (f) {
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+ TERN_(HAS_E0_FAN_TACHO, case 0:)
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+ TERN_(HAS_E1_FAN_TACHO, case 1:)
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+ TERN_(HAS_E2_FAN_TACHO, case 2:)
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+ TERN_(HAS_E3_FAN_TACHO, case 3:)
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+ TERN_(HAS_E4_FAN_TACHO, case 4:)
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+ TERN_(HAS_E5_FAN_TACHO, case 5:)
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+ TERN_(HAS_E6_FAN_TACHO, case 6:)
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+ TERN_(HAS_E7_FAN_TACHO, case 7:)
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+ // Compute fan speed
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+ rps[f] = edge_counter[f] * float(250) / elapsedTime;
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+ edge_counter[f] = 0;
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+
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+ // Check fan speed
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+ constexpr int8_t max_extruder_fan_errors = TERN(HAS_PWMFANCHECK, 10000, 5000) / Temperature::fan_update_interval_ms;
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+
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+ if (rps[f] >= 20 || TERN0(HAS_AUTO_FAN, thermalManager.autofan_speed[f] == 0))
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+ errors_count[f] = 0;
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+ else if (errors_count[f] < max_extruder_fan_errors)
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+ ++errors_count[f];
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+ else if (enabled)
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+ SBI(fan_error_msk, f);
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+ break;
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+ }
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+ }
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+
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+ // Drop the error when all fans are ok
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+ if (!fan_error_msk && error == TachoError::REPORTED) error = TachoError::FIXED;
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+
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+ if (error == TachoError::FIXED && !printJobOngoing() && !printingIsPaused()) {
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+ error = TachoError::NONE; // if the issue has been fixed while the printer is idle, reenable immediately
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+ ui.reset_alert_level();
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+ }
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+
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+ if (fan_error_msk & ~fan_reported_errors_msk) {
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+ // Handle new faults only
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+ LOOP_L_N(f, TACHO_COUNT) if (TEST(fan_error_msk, f)) report_speed_error(f);
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+ }
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+ fan_reported_errors_msk = fan_error_msk;
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+}
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+
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+void FanCheck::report_speed_error(uint8_t fan) {
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+ if (printJobOngoing()) {
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+ if (error == TachoError::NONE) {
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+ if (thermalManager.degTargetHotend(fan) != 0) {
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+ kill(GET_TEXT_F(MSG_FAN_SPEED_FAULT));
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+ error = TachoError::REPORTED;
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+ }
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+ else
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+ error = TachoError::DETECTED; // Plans error for next processed command
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+ }
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+ }
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+ else if (!printingIsPaused()) {
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+ thermalManager.setTargetHotend(0, fan); // Always disable heating
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+ if (error == TachoError::NONE) error = TachoError::REPORTED;
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+ }
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+
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+ SERIAL_ERROR_MSG(STR_ERR_FANSPEED, fan);
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+ LCD_ALERTMESSAGE(MSG_FAN_SPEED_FAULT);
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+}
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+
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+void FanCheck::print_fan_states() {
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+ LOOP_L_N(s, 2) {
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+ LOOP_L_N(f, TACHO_COUNT) {
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+ switch (f) {
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+ TERN_(HAS_E0_FAN_TACHO, case 0:)
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+ TERN_(HAS_E1_FAN_TACHO, case 1:)
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+ TERN_(HAS_E2_FAN_TACHO, case 2:)
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+ TERN_(HAS_E3_FAN_TACHO, case 3:)
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+ TERN_(HAS_E4_FAN_TACHO, case 4:)
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+ TERN_(HAS_E5_FAN_TACHO, case 5:)
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+ TERN_(HAS_E6_FAN_TACHO, case 6:)
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+ TERN_(HAS_E7_FAN_TACHO, case 7:)
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+ SERIAL_ECHOPGM("E", f);
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+ if (s == 0)
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+ SERIAL_ECHOPGM(":", 60 * rps[f], " RPM ");
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+ else
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+ SERIAL_ECHOPGM("@:", TERN(HAS_AUTO_FAN, thermalManager.autofan_speed[f], 255), " ");
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+ break;
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+ }
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+ }
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+ }
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+ SERIAL_EOL();
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+}
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+
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+#if ENABLED(AUTO_REPORT_FANS)
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+ AutoReporter<FanCheck::AutoReportFan> FanCheck::auto_reporter;
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+ void FanCheck::AutoReportFan::report() { print_fan_states(); }
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+#endif
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+
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+#endif // HAS_FANCHECK
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Giuliano Zaro