Revision 3:a0e12d12f780, committed 2021-07-25

Comitter:

dmwahl

Date:

Sun Jul 25 18:15:36 2021 +0000

Parent:

2:7083c7257556

Commit message:

Initial rough start to the BQ76PL536A (or BQ76PL536A-Q1) code

Changed in this revision

diff -r 7083c7257556 -r a0e12d12f780 bq76pl536a.cpp
--- a/bq76pl536a.cpp	Thu Jul 30 01:55:05 2020 +0000
+++ b/bq76pl536a.cpp	Sun Jul 25 18:15:36 2021 +0000
@@ -1,3 +1,13 @@
+///-----------------------------------------------------------------
+///   Description:      BQ76PL536A Driver
+///   Author:           David Wahl
+///   Date:             13-JUL-2021
+///   Notes:            Initial release
+///
+///   Revision History:
+///   Name:           Date:        Description:
+///-----------------------------------------------------------------
+
 #include "bq76pl536a.h"
 //===========================================================================
 // Default constructor. Setup spi interface and run init functions
@@ -14,7 +24,7 @@
     DigitalOut cs(_cs);
     cs = 1;
     spi.format(8,1);
-    spi.frequency(500000);
+    spi.frequency(2.5e6);
 
     cs=0;
     wait_ms(1);
@@ -26,6 +36,17 @@
 };
 
 
+//===========================================================================
+// Convert raw values to cell voltage
+float BQ76PL536A::cellVolts(u8t lobyte, u8t hibyte)
+//===========================================================================
+{
+    float cv = (((((u16t)lobyte << 8) + (u16t)hibyte)*6250/16383)/1000.0); // [V]
+    //float cv = (((lobyte * 256) + hibyte)*6250/16383); // [mV]
+
+    return cv;
+};
+//===========================================================================
 
 
 //===========================================================================
@@ -51,15 +72,10 @@
 {
     for(u8t i=0; i<numDev; i++)    {
         write(DISCOVERY_ADDR, ADDRESS_CONTROL_REG, i+1);
-
-        //write(DISCOVERY_ADDR, ADDRESS_CONTROL_REG, i); //Write address to first discovered address
-        // write 1 then 0 to Alert Status Reg to remove alert
-        //write(i, ALERT_STATUS_REG, 0b10000000); //Write 1 to address bit of alert register
-        //write(i, ALERT_STATUS_REG, 0b00000000); //Write 0 to address bit of alert register to clear alert
     }
 }
 
-//===========================================================================
+/*//===========================================================================
 // Device status
 u8t BQ76PL536A::devStatus()
 //===========================================================================
@@ -69,15 +85,25 @@
     read(1,DEVICE_STATUS_REG,1,currentStatus);
     return currentStatus[0];
 }
-//===========================================================================
-
+//===========================================================================*/
 
 //===========================================================================
 // Read one or more bytes from the BQ76 device stack. Count does not include CRC byte.
-bool *BQ76PL536A::read(u8t deviceAddress, u8t regAddress, u8t count, u8t *pRegisterValue)
+bool BQ76PL536A::readAll(u8t deviceAddress)
+//===========================================================================
+{
+    //error = 0;
+    read(deviceAddress,0,64,bqPackData);
+    return false;
+}
+
+//===========================================================================
+// Read one or more bytes from the BQ76 device stack. Count does not include CRC byte.
+bool BQ76PL536A::read(u8t deviceAddress, u8t regAddress, u8t count, u8t *pRegisterValue)
 //===========================================================================
 {
     error = 0;
+    bool crcGood = true;
     u8t logicalAddress = (deviceAddress << 1 | 0); // Shift address left 1 bit
     u8t crcInput[3+count];
     crcInput[0] = logicalAddress;
@@ -96,12 +122,14 @@
             crcInput[3+i] = pRegisterValue[i];
         }
         if (i == count) {
-            if (pec(crcInput,3+count) != pRegisterValue[i])
+            if (pec(crcInput,3+count) != pRegisterValue[i]) {
                 error = 1;
+                crcGood = false;
+            }
         }
     }
     cs = 1; //End of transmission, slave select high
-    return false;
+    return crcGood;
 }
 
 //===========================================================================

diff -r 7083c7257556 -r a0e12d12f780 bq76pl536a.h
--- a/bq76pl536a.h	Thu Jul 30 01:55:05 2020 +0000
+++ b/bq76pl536a.h	Sun Jul 25 18:15:36 2021 +0000
@@ -1,3 +1,13 @@
+///-----------------------------------------------------------------
+///   Description:      BQ76PL536A Driver
+///   Author:           David Wahl
+///   Date:             13-JUL-2021
+///   Notes:            Initial release
+///
+///   Revision History:
+///   Name:           Date:        Description:
+///-----------------------------------------------------------------
+
 #ifndef BQ76PL536A_H
 #define BQ76PL536A_H
 
@@ -9,14 +19,12 @@
 protected:
     SPI spi;
     DigitalOut cs;
-    
-    bool *read(u8t deviceAddress, u8t regAddress, u8t count, u8t *pRegisterValue);
-    void write(u8t deviceAddress, u8t regAddress, u8t regData);
-    
-    void adcConvert();
+
+
+
     void setAddresses();
     void softReset();
-    
+
     u8t pec(u8t crcBuffer[], u8t crcLength);
 
 public:
@@ -25,12 +33,21 @@
     //BQ76PL536A(SPI _spi, PinName _cs);
 
     BQ76PL536A();
+
+    bool read(u8t deviceAddress, u8t regAddress, u8t count, u8t *pRegisterValue);
+    void write(u8t deviceAddress, u8t regAddress, u8t regData);
+
+    void adcConvert();
+    bool readAll(u8t deviceAddress);
+
     u8t error, balanceTimeout;
     u16t cov, cuv;
     bool balanceEnabled;
     u8t numDev, attachedCells[];
-    
-    u8t devStatus();
+
+    u8t bqPackData[65];
+
+    float cellVolts(u8t lobyte, u8t hibyte);
 };
 
 #endif
\ No newline at end of file

diff -r 7083c7257556 -r a0e12d12f780 bq76pl536a_typedefs.h
--- a/bq76pl536a_typedefs.h	Thu Jul 30 01:55:05 2020 +0000
+++ b/bq76pl536a_typedefs.h	Sun Jul 25 18:15:36 2021 +0000
@@ -1,3 +1,13 @@
+///-----------------------------------------------------------------
+///   Description:      BQ76PL536A Driver
+///   Author:           David Wahl
+///   Date:             13-JUL-2021
+///   Notes:            Initial release
+///
+///   Revision History:
+///   Name:           Date:        Description:
+///-----------------------------------------------------------------
+
 #ifndef BQ76PL536A_TYPEDEFS_H
 #define BQ76PL536A_TYPEDEFS_H
 
@@ -72,12 +82,12 @@
   0x8A,0x8D,0x84,0x83,0xDE,0xD9,0xD0,0xD7,0xC2,0xC5,0xCC,0xCB,0xE6,0xE1,0xE8,0xEF,0xFA,
   0xFD,0xF4,0xF3};
 
-//*BQ Pack special addresses*/
+//*BQ76PL536A special addresses*/
 #define BROADCAST_ADDR            0x3F
 #define DISCOVERY_ADDR            0x00
-#define BQ76PL536_RESET           0xa5
+#define BQ76PL536A_RESET           0xa5
 
-//Definition of the BQ76PL536 registers
+//Definition of the BQ76PL536A registers
 typedef enum BQ_DEV_REGS
 {
   DEVICE_STATUS_REG=0x00,
@@ -130,12 +140,6 @@
   BQ_SPI_REG_MAX=0x4F
 } bq_dev_regs_t;
 
-
-//*BQ Pack special addresses*/
-#define BROADCAST_ADDR 0x3F
-#define DISCOVERY_ADDR 0x00
-#define BQ76PL536A_RESET 0xa5
-
 //delay after bq calls
 #define BQDELAY 10
 //----------------------------------------------------------------------------------------