/ Configuring in- and outputs pinMode(DRDY_PIN, INPUT); pinMode(CS_PIN, OUTPUT); // Deselecting MAX31865 digitalWrite(CS_PIN, HIGH); // Configuring SPI SPI.begin(); SPI.setDataMode(SPI_MODE1); //SPI.setClockDivider(SPI_CLOCK_DIV128); // wait for MAX31865 to set up delay(200); // initial configuration of MAX31865 if (!send_config(MAX31865_CONFIG)) { Serial.println("Communication failed!"); Serial.println(spi_read(CONFIGURATION_REGISTER), BIN); while(true); } // TODO: Set threshold for temperature reading }
/* * max31865.c * * Created: 13.9.2019 12:34:48 * Author : strakos.p */ // Includes #include "max31865.h" // Constant macro #define DDR(x) (*(&x - 1)) // address of data direction register of port x #if defined
of MAX31865 - RTD to Digital Converter:"); Write(Configuration, 0b11010000); // Enabling Vbias of max31865 value = Read(read_Configuration); // Reading contents of Configuration register to verify communication with max31865 is done properly if (value == 208) { Write(Write_High_Fault_Threshold_MSB, 0xFF); // Writing High Fault Threshold MSB Write(Write_High_Fault_Threshold_LSB, 0xFF); // Writing High Fault Threshold LSB
DUMMY_THERMISTOR_998_VALUE 25 #define DUMMY_THERMISTOR_999_VALUE 100 // Resistor values when using MAX31865 sensors (-5) on TEMP_SENSOR_0 / 1 //#define MAX31865_SENSOR_OHMS_0 100 // (Ω) Typically 100 or 1000 (PT100 or PT1000) //#define MAX31865_CALIBRATION_OHMS_0 430 // (Ω) Typically 430 for Adafruit PT100; 4300 for Adafruit PT1000 //#define MAX31865_SENSOR_OHMS_1 100 //#define MAX31865_CALIBRATION_OHMS_1 430 #define TEMP_RESIDENCY_TIME 10 // (seconds) Time to wait for hotend to "settle" in M109 #define TEMP_WINDOW 1 // (°C) Temperature proximity
DUMMY_THERMISTOR_998_VALUE 25 #define DUMMY_THERMISTOR_999_VALUE 100 // Resistor values when using MAX31865 sensors (-5) on TEMP_SENSOR_0 / 1 //#define MAX31865_SENSOR_OHMS_0 100 // (Ω) Typically 100 or 1000 (PT100 or PT1000) //#define MAX31865_CALIBRATION_OHMS_0 430 // (Ω) Typically 430 for AdaFruit PT100; 4300 for AdaFruit PT1000 //#define MAX31865_SENSOR_OHMS_1 100 //#define MAX31865_CALIBRATION_OHMS_1 430 // Use temp sensor 1 as a redundant sensor with sensor 0. If the readings // from the two sensors differ too much the print will be aborted
Burnout-Strom und 24-bit-ADC. Die Diagnose-Logik bleibt dieselbe; nur die Schalter sitzen im Chip. MAX31865 erkennt Open/Overvoltage, unterscheidet Vertauschungen aber nicht zuverlässig — dafür braucht es die Paarmatrix. 2. Paarmatrix — was „gut“ bedeutet Sechs Messungen reichen. Strom 1 mA in ein Paar,
Bild
Bild
Bild
