Support for V440 module hardware

stuartpittaway · Feb 24, 2021 · 593a81c · 593a81c
1 parent b4309a0
commit 593a81c
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Showing 5 changed files with 159 additions and 67 deletions.
diff --git a/ATTINYCellModule/include/defines.h b/ATTINYCellModule/include/defines.h
@@ -22,7 +22,7 @@ Attribution-NonCommercial-ShareAlike 2.0 UK: England & Wales (CC BY-NC-SA 2.0 UK
 #error You need to specify the DIYBMSMODULEVERSION define
 #endif
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION > 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION > 440
 #error Incorrect value for DIYBMSMODULEVERSION
 #endif
 

diff --git a/ATTINYCellModule/include/diybms_attiny841.h b/ATTINYCellModule/include/diybms_attiny841.h
@@ -32,7 +32,6 @@ class DiyBMSATTiny841
       //Switch OFF Bit 1 – OCIE1A: Timer/Counter, Output Compare A Match Interrupt Enable
       TIMSK1 &= (~_BV(OCIE1A));
    }
-
    static void StartTimer1()
    {
       //Normal port operation, OC1A/OC1B disconnected
@@ -50,7 +49,7 @@ class DiyBMSATTiny841
 
       // Prescaler 8Mhz/64 = 125000 counts per second, call ISR 1000 times per second
       // Prescaler 2Mhz/64 = 31250 counts per second, call ISR 1000 times per second - roughly, as rounding error of 31.25
-      OCR1A = (F_CPU/64)/1000;
+      OCR1A = (F_CPU / 64) / 1000;
 
       ResumePWM();
    }
@@ -61,14 +60,39 @@ class DiyBMSATTiny841
       DumpLoadOff();
    }
 
+   static void SetPrescaler()
+   {
+      //Boot up will be in 1Mhz CKDIV8 mode, swap to /4 to change speed to 2Mhz
+      byte oldSREG = SREG;
+      cli();
+      /*atomic code, as its time sensitive*/;
+      //CCP – Configuration Change Protection Register
+      CCP = 0xD8;
+      //CLKPR – Clock Prescale Register
+      CLKPR = _BV(CLKPS1);
+      SREG = oldSREG;
+   }
+
    static void DumpLoadOn()
    {
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
+      //Pre 4.4 board
       PORTA |= _BV(PORTA3);
+#else
+      //4.4 board
+      PORTB |= _BV(PORTB2);
+#endif
    }
 
    static void DumpLoadOff()
    {
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
+      //Pre 4.4 board
       PORTA &= (~_BV(PORTA3));
+#else
+      //4.4 board
+      PORTB &= (~_BV(PORTB2));
+#endif
    }
 
    static void ReferenceVoltageOn()
@@ -83,17 +107,17 @@ class DiyBMSATTiny841
       PORTA &= (~_BV(PORTA7));
    }
 
-   static void GreenLedOn()
+   static void NotificationLedOn()
    {
       PORTA |= _BV(PORTA6);
    }
 
-   static void GreenLedOff()
+   static void NotificationLedOff()
    {
       PORTA &= (~_BV(PORTA6));
    }
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
    static void SparePinOn()
    {
       PORTB |= _BV(PORTB1);
@@ -105,7 +129,7 @@ class DiyBMSATTiny841
    }
 #endif
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
    static void BlueLedOn()
    {
       PORTA |= _BV(PORTA5);
@@ -179,36 +203,52 @@ class DiyBMSATTiny841
 
    static void SelectCellVoltageChannel()
    {
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
+      //Pre 4.4 board
       //PB2 = ADC8 PIN 5 ARDUINO PIN 2/A8 = VOLTAGE reading
       //ADMUXA – ADC Multiplexer Selection Register A
       //ADC8 (single end) MUX[5:0] 00 1000
-      ADMUXA = (0 << MUX5) | (0 << MUX4) | (1 << MUX3) | (0 << MUX2) | (0 << MUX1) | (0 << MUX0);
+      //ADMUXA = (0 << MUX5) | (0 << MUX4) | (1 << MUX3) | (0 << MUX2) | (0 << MUX1) | (0 << MUX0);
+      ADMUXA = B00001000;
+
+#else
+      //4.4 board
+
+      //PA3 = ADC3 PIN 10 = VOLTAGE READING
+      //See Page 144 in the datasheet for information
+      //ADMUXA = (0 << MUX5) | (0 << MUX4) | (0 << MUX3) | (0 << MUX2) | (1 << MUX1) | (1 << MUX0);
+      ADMUXA = B00000011;
+
+#endif
    }
 
    static void SelectInternalTemperatureChannel()
    {
       //PA4
       //ADMUXA – ADC Multiplexer Selection Register A
       //ADC4 (single end) MUX[5:0] 00 0100
-      ADMUXA = (0 << MUX5) | (0 << MUX4) | (0 << MUX3) | (1 << MUX2) | (0 << MUX1) | (0 << MUX0);
+      //ADMUXA = (0 << MUX5) | (0 << MUX4) | (0 << MUX3) | (1 << MUX2) | (0 << MUX1) | (0 << MUX0);
+      ADMUXA = B00000100;
    }
 
    static void SelectExternalTemperatureChannel()
    {
-      //External sensor
-      //ADMUXA – ADC Multiplexer Selection Register A
+//External sensor
+//ADMUXA – ADC Multiplexer Selection Register A
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
       //ADC11 (single end) MUX[5:0] 00 1011
-      ADMUXA = (0 << MUX5) | (0 << MUX4) | (1 << MUX3) | (0 << MUX2) | (1 << MUX1) | (1 << MUX0);
+      //ADMUXA = (0 << MUX5) | (0 << MUX4) | (1 << MUX3) | (0 << MUX2) | (1 << MUX1) | (1 << MUX0);
+      ADMUXA = B00001011;
 #else
-      //V4.3 boards ADC5 (single end) MUX[5:0] 00 0101
-      ADMUXA = (0 << MUX5) | (0 << MUX4) | (0 << MUX3) | (1 << MUX2) | (0 << MUX1) | (1 << MUX0);
+      //V4.4 boards ADC5 (single end) MUX[5:0] 00 0101
+      //ADMUXA = (0 << MUX5) | (0 << MUX4) | (0 << MUX3) | (1 << MUX2) | (0 << MUX1) | (1 << MUX0);
+      ADMUXA = B00000101;
 #endif
    }
 
-   static void double_tap_green_led();
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+   static void double_tap_Notification_led();
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
    static void double_tap_blue_led();
 #endif
 };

diff --git a/ATTINYCellModule/platformio.ini b/ATTINYCellModule/platformio.ini
@@ -28,7 +28,7 @@
 ;                  [Blue LED removed, resetable fuse fitted]
 ;** DO NOT FLASH V430 TO AN OLDER BOARD - THE ATTINY WILL BECOME UNUSABLE **
 [platformio]
-default_envs = V400, V410, V420, V420_SWAPR19R20, V421, V421_LTO
+default_envs = V400, V410, V420, V420_SWAPR19R20, V421, V421_LTO, V440
 description=DIYBMS Cell monitoring module code
 
 [env]
@@ -61,7 +61,7 @@ upload_flags =
   -Pusb
   -Ulfuse:w:0b01100010:m
   -Uhfuse:w:0b11010110:m
-  -Uefuse:w:0b11110100:m
+  -Uefuse:w:0b11110100:m          
 
 [env:V400]
 ; 8 balance resistors marked 2R2
@@ -88,3 +88,27 @@ build_flags=-DDIYBMSMODULEVERSION=421 -DMV_PER_ADC=2.00 -DINT_BCOEFFICIENT=4050
 ;Round PCB with bolt hole. 10 balance resistors marked 6.2OHM
 ;Uses resistor divider circuit of 18.2K/13K ohms = 1.24V output for 3.00V input
 build_flags=-DDIYBMSMODULEVERSION=421 -DMV_PER_ADC=1.00 -DINT_BCOEFFICIENT=3950 -DEXT_BCOEFFICIENT=3950 -DLOAD_RESISTANCE=2.48 -DBAUD=2400
+
+[env:V440]
+;DIYBMS V4.40 - DO NOT USE THIS SETTING WITH OLDER BOARDS THEY
+;               WILL BE RENDERED USELESS (CLOCK FUSE CHANGES)
+;Almost completely different pin mapping compared to previous modules
+;Single LED and external crystal (8Mhz), has breakaway thermistor sub pcb board
+;Has fuse and TVS diode on inputs and uses AZ432ANTR-E1 voltage reference
+;PA0/PA6/PA4/PA7 are same purpose as previous boards
+;PB2 = DUMP LOAD ENABLE, PA3 = VOLTAGE ADC, PA5 = EXT THERMISTOR ADC
+;BLUE LED DOES NOT EXIST ON V440 (Well it does, but the green has been replaced with blue!)
+build_flags=-DDIYBMSMODULEVERSION=440 -DMV_PER_ADC=2.00 -DINT_BCOEFFICIENT=3950 -DEXT_BCOEFFICIENT=3950 -DLOAD_RESISTANCE=3.30 -DBAUD=2400
+; Fuses E:F4, H:D6, L:62
+; lfuse = 0110 0010 = CKDIV8 (enabled) & Calibrated Internal 8MHz Oscillator
+; hfuse = 1101 0110 = EESAVE & 1.8V BOD detection level
+; efuse = 1111 0100 = Enables SPM instruction
+board_fuses.lfuse = 0b01101100
+board_fuses.hfuse = 0b11010110
+board_fuses.efuse = 0b11110100
+;-B16 option needed for my USBASP programmer to slow it down!
+upload_flags =
+  -Pusb
+  -Ulfuse:w:0b01101100:m
+  -Uhfuse:w:0b11010110:m
+  -Uefuse:w:0b11110100:m
diff --git a/ATTINYCellModule/src/diybms_attiny841.cpp b/ATTINYCellModule/src/diybms_attiny841.cpp
@@ -38,30 +38,42 @@ FOR MODULE VERSION 400,410,420,421....
   PA3 = DUMP LOAD ENABLE / PIN 10 /  ARDUINO PIN 7/A3 / TOCC2
   PA4 = ADC4 PIN 9 ARDUINO PIN 6/A4 = ON BOARD TEMP sensor
   PA5 = SERIAL PORT 1 TXD1 - NOT USED (BLUE LED ON <V430 BOARDS AND EXT TEMP SENSOR ON >=430)
-  PA6 = GREEN_LED / PIN 7 / ARDUINO PIN 4/A6
+  PA6 = Notification LED / PIN 7 / ARDUINO PIN 4/A6
   PA7 = ADC7 = PIN 6 = ARDUINO PIN 3/A7 = 2.048V REFERENCE ENABLE
   PB2 = ADC8 PIN 5 ARDUINO PIN 2/A8 = VOLTAGE reading
   PB0 = ADC11 PIN 2 ARDUINO PIN 0/A11 = REMOTE TEMP sensor = XTAL
   PB1 = ADC10 PIN 3 ARDUINO PIN 1/A10 = SPARE INPUT/OUTPUT = XTAL
 
   ATTiny841 data sheet
   http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-8495-8-bit-AVR-Microcontrollers-ATtiny441-ATtiny841_Datasheet.pdf
+
+V440 pin mappings
+PA0 = EXT REFERENCE
+PA6 = Notification LED
+PA4 = INT THERMISTOR ADC
+PA7 = ENABLE
+
+PB2 = DUMP LOAD ENABLE
+PA3 = VOLTAGE ADC
+PA5 = EXT THERMISTOR ADC
+
+BLUE LED DOES NOT EXIST ON V440 (Well it does, but the green has been replaced with blue!)
 */
 
 #include "diybms_attiny841.h"
 
-void DiyBMSATTiny841::double_tap_green_led()
+void DiyBMSATTiny841::double_tap_Notification_led()
 {
-  GreenLedOn();
+  NotificationLedOn();
   delay(50);
-  GreenLedOff();
+  NotificationLedOff();
   delay(50);
-  GreenLedOn();
+  NotificationLedOn();
   delay(50);
-  GreenLedOff();
+  NotificationLedOff();
 }
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
 void DiyBMSATTiny841::double_tap_blue_led()
 {
   BlueLedOn();
@@ -81,17 +93,35 @@ void DiyBMSATTiny841::ConfigurePorts()
   //PUEB – Port B Pull-Up Enable Control Register (All disabled)
   PUEB = 0;
 
-  //DDRA – Port A Data Direction Register
-  //When DDAn is set, the pin PAn is configured as an output. When DDAn is cleared, the pin is configured as an input
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
-  DDRA |= _BV(DDA3) | _BV(DDA6) | _BV(DDA7) | _BV(DDA5);
-#else
-  //4.3 boards dont have blue led, so don't configure DA5
-  DDRA |= _BV(DDA3) | _BV(DDA6) | _BV(DDA7);
-#endif
+//DDRA – Port A Data Direction Register
+//When DDAn is set, the pin PAn is configured as an output. When DDAn is cleared, the pin is configured as an input
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
+  //PA3 = dump load enable
+  //PA6 = Notification LED (green)
+  //PA7 = enable
+  //PA5 = BLUE
+  DDRA = _BV(DDA3) | _BV(DDA6) | _BV(DDA7) | _BV(DDA5);
   //DDRB – Port B Data Direction Register
   //Spare pin is output
-  DDRB |= _BV(DDB1);
+  DDRB = _BV(DDB1);
+
+  //Digital Input Disable Register 0
+  //PA4 (ADC4), PB2 (ADC8) and PB0 (ADC11) analog inputs, so disable digital pins to save power
+  DIDR0 = _BV(ADC4D);
+  DIDR1 = _BV(ADC8D) |_BV(ADC11D);
+
+#else
+  //4.4 boards don't have blue led
+  //PB2 = DUMP LOAD ENABLE
+  //PA6 = Notification LED (BLUE)
+  //PA7 = ENABLE
+  DDRA = _BV(DDA6) | _BV(DDA7);
+  DDRB = _BV(DDB2);
+
+  //Digital Input Disable Register 0
+  //PA3 (ADC3), PA4 (ADC4) and PA5 (ADC5) are analog inputs, so disable digital pins to save power
+  DIDR0 = _BV(ADC3D) | _BV(ADC4D) |_BV(ADC5D);
+#endif
 
   //Set the extra high sink capability of pin PA7 is enabled.
   PHDE |= _BV(PHDEA1);
@@ -100,10 +130,11 @@ void DiyBMSATTiny841::ConfigurePorts()
   DumpLoadOff();
   ReferenceVoltageOff();
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
   BlueLedOff();
 #endif
-  GreenLedOff();
+
+  NotificationLedOff();
 }
 
 void DiyBMSATTiny841::SetWatchdog8sec()
@@ -140,18 +171,20 @@ void DiyBMSATTiny841::BeginADCReading()
   //ADCSRA – ADC Control and Status Register A
   //Consider ADC sleep conversion mode?
 
+  /*
 #if !(F_CPU == 8000000)
   //prescaler of 64 = 8MHz/64 = 125KHz.
   ADCSRA |= _BV(ADPS2) | _BV(ADPS1); // | _BV(ADPS0);
 #endif
 
 #if !(F_CPU == 2000000)
+*/
+
   //prescaler of 16 = 2MHz/16 = 125000.
   ADCSRA |= _BV(ADPS2);
-#endif
 
+  //#endif
 
-  //adc_enable();
   //Bit 4 – ADIF: ADC Interrupt Flag
   //Bit 7 – ADEN: ADC Enable
   ADCSRA |= _BV(ADEN) | _BV(ADIF); // enable ADC, turn off any pending interrupt
@@ -189,7 +222,7 @@ void DiyBMSATTiny841::Sleep()
   // disable ADC
   ADCSRA = 0;
 
-#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 430
+#if defined(DIYBMSMODULEVERSION) && DIYBMSMODULEVERSION < 440
   set_sleep_mode(SLEEP_MODE_PWR_DOWN);
 #else
   //Using an external crystal so keep it awake - consumes more power (about 0.97mA vs 0.78mA) but module wakes quicker (6 clock cycles)