Added Bipolar Aux Voltage Measurement and extern "C" wrapper

Author: Max 'MaxMax' Mönikes

TLE9012.cpp

@@ -152,7 +152,7 @@ void TLE9012::wakeUp()
       deviceID = nodeID-1;
 
     writeRegisterSingle(nodeID, MEAS_CTRL, 0xEE61); //Trigger PCVM, BVM and SCVM with PBOFF
-    mcuDelay(5);
+    mcuDelay(6);
 
     for(uint8_t n = 0; n < devices[deviceID].n_cells; n++)
     {
@@ -297,6 +297,56 @@ void TLE9012::wakeUp()
     (void) writeRegisterSingle(nodeID, AVM_CONFIG, avm_sensemask);
   }
 
+  void TLE9012::setBAVMConfig(uint8_t nodeID, uint8_t bavm_status)
+  {
+    if(nodeID > N_DEVICES)
+    {
+      return; //Early return if device number is to high
+    }
+
+    uint8_t deviceID = nodeID - 1;
+
+    if(nodeID == 0)
+      deviceID = 0;
+    else
+      deviceID = nodeID-1;
+
+    if(bavm_status != 0)
+      (void) writeRegisterSingle(nodeID, AVM_CONFIG, 0x0107); //Default pulldowns and BAVM activated
+    else
+      (void) writeRegisterSingle(nodeID, AVM_CONFIG, 0x0007);
+  }
+
+  void TLE9012::readCellVoltagesWithBAVM(uint8_t nodeID)
+  {
+
+    if(nodeID > N_DEVICES)
+    {
+      return; //Early return if device number is to high
+    }
+
+    uint8_t deviceID = nodeID - 1;
+
+    if(nodeID == 0)
+      deviceID = 0;
+    else
+      deviceID = nodeID-1;
+    
+    writeRegisterSingle(nodeID, MEAS_CTRL, 0xEE61); //Trigger PCVM, BVM and SCVM with PBOFF
+    mcuDelay(6);
+
+    for(uint8_t n = 0; n < devices[deviceID].n_cells; n++)
+    {
+      (void) readRegisterSingle(nodeID, PCVM_0 + (12-devices[deviceID].n_cells + n), &devices[deviceID].cell_voltages[n]);
+    }
+
+    (void) readRegisterSingle(nodeID,BVM,(uint16_t*)&devices[deviceID].bipolar_auxilary_voltage);
+    (void) readRegisterSingle(nodeID,SCVM_HIGH,&devices[deviceID].scvm_high);
+    devices[deviceID].scvm_high &= 0xFFE0; //Remove rolling counter
+    (void) readRegisterSingle(nodeID,SCVM_LOW,&devices[deviceID].scvm_low);
+    devices[deviceID].scvm_low &= 0xFFE0; //Remove rolling counter
+  }
+
 /**
  * @brief Read the internal chip temperature of internal chiptemperature sensor 1 and 2
  * 

TLE9012.h

@@ -31,6 +31,9 @@ SOFTWARE.
 #include <Arduino.h>
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 //-----------------------------------------------------------------------------
 //                          Defines for Lib Configuration
@@ -168,6 +171,7 @@ typedef struct
 {
   uint16_t cell_voltages[12]; /**< Array that hold up to 12 cell voltages that can be measured */
   uint16_t block_voltage; /**< Block Voltage of the complete stack */
+  int16_t bipolar_auxilary_voltage; /**< BAVM results if this mode is choosen instead of Block Voltage */
   uint16_t ntc_resistances[5]; /**< Measured NTC Resistance */
   uint8_t ntc_results_valid;
   uint16_t chiptemperature1; /**< Temperature of internal Temperature Sensor Nr. 1 */
@@ -358,6 +362,8 @@ typedef struct
       void setNumberofCells(uint8_t nodeID, uint8_t n_cells);
       void setTempSensorsConfig(uint8_t nodeID, uint8_t n_temp_sensors,ntc_config_t sensorconfig);
       void readChipTemperatures(uint8_t nodeID);
+      void setBAVMConfig(uint8_t nodeID, uint8_t bavm_status);
+      void readCellVoltagesWithBAVM(uint8_t nodeID);
 
       //Watchdog and Power state handling
       void activateSleep();
@@ -413,6 +419,8 @@ typedef struct
 
   };
 
-
+#ifdef __cplusplus
+}
+#endif
 
 #endif

examples/Read_Voltages/Read_Voltages.ino

@@ -25,9 +25,9 @@ SOFTWARE.
 
 #include "TLE9012.h"
 
-#define N_CELLS 12
-#define TXPIN 17
-#define RXPIN 16
+#define N_CELLS 6
+#define TXPIN 10
+#define RXPIN 11
 
 TLE9012 tle9012;
 
@@ -38,8 +38,8 @@ TLE9012 tle9012;
 
 void setup() {
 
+  tle9012.init(&Serial1, 2000000,RXPIN,TXPIN); //Initialize driver with 2Mbit
 
-  tle9012.init(&Serial2, 2000000,RXPIN,TXPIN); //Initialize driver with 2Mbit
 
   Serial.begin(115200);
   Serial.println("Boot completed");
@@ -56,25 +56,34 @@ void setup() {
     Serial.println("Connection Check completed");
 
   tle9012.setNumberofCells(1, N_CELLS); //Configure the number of cells
+  tle9012.setBAVMConfig(1,1);
   tle9012.resetWatchdog(); //Reset Watchdog Timer
-
+  tle9012.clearExtendedWatchdog(1);
 }
 
 void loop() {
 
   tle9012.resetWatchdog(); //Reset Watchdog Timer
-  tle9012.readCellVoltages(1);  //Read all cell voltages from device 1
+  tle9012.readCellVoltagesWithBAVM(1);  //Read all cell voltages from device 1
 
   for(uint8_t n = 0; n < N_CELLS; n++)  //Print cell voltages to Serial Monitor
   {
     Serial.print("Cell Voltage ");
     Serial.print(n+1);
     Serial.print(": ");
-    Serial.println(ADCVALUE_TO_FLOAT_VOLTAGE(tle9012.devices[0].cell_voltages[n]));
+    Serial.println(ADCVALUE_TO_FLOAT_VOLTAGE(tle9012.devices[0].cell_voltages[n]),4);
   }
 
+  Serial.print("BAVM: ");
+  Serial.println(convertBAVMtoCurrent(tle9012.devices[0].bipolar_auxilary_voltage),5);
+
   Serial.println("-------------------------------------------------");
 
   delay(1000);
 
 }
+
+float convertBAVMtoCurrent(int16_t shuntval)
+{
+  return ((2*(float)shuntval)/32768)/0.2;
+}