🐛 Redundant Temp Sensor followup (#22196)

2021-07-06 17:36:41 -07:00
parent 9eb5444c20
commit b2f0913083
49 changed files with 1567 additions and 787 deletions
--- a/Marlin/src/libs/MAX31865.h
+++ b/Marlin/src/libs/MAX31865.h
@@ -0,0 +1,131 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Based on Adafruit MAX31865 library:
+ *
+ * This is a library for the Adafruit PT100/P1000 RTD Sensor w/MAX31865
+ * Designed specifically to work with the Adafruit RTD Sensor
+ * https://www.adafruit.com/products/3328
+ *
+ * This sensor uses SPI to communicate, 4 pins are required to interface.
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * Written by Limor Fried/Ladyada for Adafruit Industries.
+ *
+ * Modifications by JoAnn Manges (@GadgetAngel)
+ * Copyright (c) 2020, JoAnn Manges
+ * All rights reserved.
+ */
+#pragma once
+
+#include "../inc/MarlinConfig.h"
+#include "../HAL/shared/Delay.h"
+#include HAL_PATH(../HAL, MarlinSPI.h)
+
+#define MAX31856_CONFIG_REG 0x00
+#define MAX31856_CONFIG_BIAS 0x80
+#define MAX31856_CONFIG_MODEAUTO 0x40
+#define MAX31856_CONFIG_MODEOFF 0x00
+#define MAX31856_CONFIG_1SHOT 0x20
+#define MAX31856_CONFIG_3WIRE 0x10
+#define MAX31856_CONFIG_24WIRE 0x00
+#define MAX31856_CONFIG_FAULTSTAT 0x02
+#define MAX31856_CONFIG_FILT50HZ 0x01
+#define MAX31856_CONFIG_FILT60HZ 0x00
+
+#define MAX31856_RTDMSB_REG 0x01
+#define MAX31856_RTDLSB_REG 0x02
+#define MAX31856_HFAULTMSB_REG 0x03
+#define MAX31856_HFAULTLSB_REG 0x04
+#define MAX31856_LFAULTMSB_REG 0x05
+#define MAX31856_LFAULTLSB_REG 0x06
+#define MAX31856_FAULTSTAT_REG 0x07
+
+#define MAX31865_FAULT_HIGHTHRESH 0x80  // D7
+#define MAX31865_FAULT_LOWTHRESH 0x40   // D6
+#define MAX31865_FAULT_REFINLOW 0x20    // D5
+#define MAX31865_FAULT_REFINHIGH 0x10   // D4
+#define MAX31865_FAULT_RTDINLOW 0x08    // D3
+#define MAX31865_FAULT_OVUV 0x04        // D2
+
+// http://www.analog.com/media/en/technical-documentation/application-notes/AN709_0.pdf
+// constants for calulating temperature from the measured RTD resistance.
+#define RTD_Z1 -0.0039083
+#define RTD_Z2 0.00001758480889
+#define RTD_Z3 -0.0000000231
+#define RTD_Z4 -0.000001155
+
+typedef enum max31865_numwires {
+  MAX31865_2WIRE = 0,
+  MAX31865_3WIRE = 1,
+  MAX31865_4WIRE = 0
+} max31865_numwires_t;
+
+/* Interface class for the MAX31865 RTD Sensor reader */
+class MAX31865 {
+private:
+  static SPISettings spiConfig;
+
+  TERN(LARGE_PINMAP, uint32_t, uint8_t) _sclk, _miso, _mosi, _cs;
+  float Rzero, Rref;
+
+  void setConfig(uint8_t config, bool enable);
+
+  void readRegisterN(uint8_t addr, uint8_t buffer[], uint8_t n);
+  uint8_t readRegister8(uint8_t addr);
+  uint16_t readRegister16(uint8_t addr);
+
+  void writeRegister8(uint8_t addr, uint8_t reg);
+  uint8_t spixfer(uint8_t addr);
+
+public:
+  #ifdef LARGE_PINMAP
+    MAX31865(uint32_t spi_cs, uint8_t pin_mapping);
+    MAX31865(uint32_t spi_cs, uint32_t spi_mosi, uint32_t spi_miso,
+             uint32_t spi_clk, uint8_t pin_mapping);
+  #else
+    MAX31865(int8_t spi_cs);
+    MAX31865(int8_t spi_cs, int8_t spi_mosi, int8_t spi_miso,
+             int8_t spi_clk);
+  #endif
+
+  void begin(max31865_numwires_t wires, float zero, float ref);
+
+  uint8_t readFault();
+  void clearFault();
+
+  void setWires(max31865_numwires_t wires);
+  void autoConvert(bool b);
+  void enable50HzFilter(bool b);
+  void enableBias(bool b);
+  void oneShot();
+
+  uint16_t readRaw();
+  float readResistance();
+  float temperature();
+  float temperature(uint16_t adcVal);
+  float temperature(float Rrtd);
+};