Merge pull request #40 from caternuson/iss5_faults

Add fault check cycle modes
adafruit · Oct 24, 2022 · 0e08be5 · 0e08be5
2 parents 6875f69 + efced8a
commit 0e08be5
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Showing 2 changed files with 31 additions and 2 deletions.
diff --git a/Adafruit_MAX31865.cpp b/Adafruit_MAX31865.cpp
@@ -73,10 +73,32 @@ bool Adafruit_MAX31865::begin(max31865_numwires_t wires) {
 /**************************************************************************/
 /*!
     @brief Read the raw 8-bit FAULTSTAT register
+    @param fault_cycle The fault cycle type to run. Can be MAX31865_FAULT_NONE,
+   MAX31865_FAULT_AUTO, MAX31865_FAULT_MANUAL_RUN, or
+   MAX31865_FAULT_MANUAL_FINISH
     @return The raw unsigned 8-bit FAULT status register
 */
 /**************************************************************************/
-uint8_t Adafruit_MAX31865::readFault(void) {
+uint8_t Adafruit_MAX31865::readFault(max31865_fault_cycle_t fault_cycle) {
+  if (fault_cycle) {
+    uint8_t cfg_reg = readRegister8(MAX31865_CONFIG_REG);
+    cfg_reg &= 0x11; // mask out wire and filter bits
+    switch (fault_cycle) {
+    case MAX31865_FAULT_AUTO:
+      writeRegister8(MAX31865_CONFIG_REG, (cfg_reg | 0b10000100));
+      delay(1);
+      break;
+    case MAX31865_FAULT_MANUAL_RUN:
+      writeRegister8(MAX31865_CONFIG_REG, (cfg_reg | 0b10001000));
+      return 0;
+    case MAX31865_FAULT_MANUAL_FINISH:
+      writeRegister8(MAX31865_CONFIG_REG, (cfg_reg | 0b10001100));
+      return 0;
+    case MAX31865_FAULT_NONE:
+    default:
+      break;
+    }
+  }
   return readRegister8(MAX31865_FAULTSTAT_REG);
 }
 

diff --git a/Adafruit_MAX31865.h b/Adafruit_MAX31865.h
@@ -60,6 +60,13 @@ typedef enum max31865_numwires {
   MAX31865_4WIRE = 0
 } max31865_numwires_t;
 
+typedef enum {
+  MAX31865_FAULT_NONE = 0,
+  MAX31865_FAULT_AUTO,
+  MAX31865_FAULT_MANUAL_RUN,
+  MAX31865_FAULT_MANUAL_FINISH
+} max31865_fault_cycle_t;
+
 /*! Interface class for the MAX31865 RTD Sensor reader */
 class Adafruit_MAX31865 {
 public:
@@ -69,7 +76,7 @@ class Adafruit_MAX31865 {
 
   bool begin(max31865_numwires_t x = MAX31865_2WIRE);
 
-  uint8_t readFault(void);
+  uint8_t readFault(max31865_fault_cycle_t fault_cycle = MAX31865_FAULT_AUTO);
   void clearFault(void);
   uint16_t readRTD();