Version: 1.1.0

- Added support for Timer2 & Timer3 (see config header)
- Added `setCurrentQA()` API call (native=fast 1/4 A resolution)

API.md

@@ -48,6 +48,10 @@ Note: all control functions validate their parameters. If you pass any value out
   - `bool setCurrent(float amps)` -- Set momentary battery pack current level
     - amps: -500 .. +500 (A, positive = charge, negative = discharge)
   
+  - `bool setCurrentQA(long quarterAmps)` -- Set momentary battery pack current level
+    - quarterAmps: -2000 .. +2000 (1/4 A, positive = charge, negative = discharge)
+    - This is the native BMS current resolution, so no float/division necessary
+  
   - `bool setSOC(float soc)` -- Set state of charge
     - soc: 0.00 .. 100.00 (%)
     - Note: the charger will not start charging at SOC=100%

HISTORY.md

@@ -1,6 +1,12 @@
 # History
 
 
+## Version: 1.1.0 (2017-06-20)
+
+- Added support for Timer2 & Timer3 (see config header)
+- Added `setCurrentQA()` API call (native=fast 1/4 A resolution)
+
+
 ## Version: 1.0.0 (2017-06-17)
 
 - Conversion to Arduino library

README.md

@@ -19,7 +19,10 @@ To download, click the DOWNLOADS button in the top right corner, download the ZI
 
 You will also need these libraries:
   - [MCP_CAN_lib by Cory Fowler](https://github.com/coryjfowler/MCP_CAN_lib)
-  - [TimerOne by Paul Stoffregen](https://github.com/PaulStoffregen/TimerOne)
+  - …and one of…
+    - [TimerOne by Paul Stoffregen](https://github.com/PaulStoffregen/TimerOne)
+    - [FlexiTimer2 by Paul Stoffregen](https://github.com/PaulStoffregen/FlexiTimer2)
+    - [TimerThree by Paul Stoffregen](https://github.com/PaulStoffregen/TimerThree)
 
 To get the smallest possible ROM & RAM footprint, set `TWIZY_DEBUG_LEVEL` to 0 and `DEBUG_MODE` of the MCP_CAN library to 0. This reduces the core memory usage of the VirtualBMS library to (currently) 8338 bytes ROM and 403 bytes RAM.
 

examples/SimpleBMS/TwizyVirtualBMS_config.h

@@ -20,13 +20,22 @@
 // You may need to lower this if your Arduino is too slow.
 #define TWIZY_CAN_CLOCK_US        10000
 
+// VirtualBMS can use Timer1 (16 bit), Timer2 (8 bit) or Timer3 (16bit)
+// Select Timer2/3 if you need Timer1 for e.g. AltSoftSerial
+#define TWIZY_USE_TIMER           1
+
+// Timer2: precise resolutions depend on CPU type & clock frequency
+// i.e. Arduino Nano 16 MHz: 1000 = 1 ms / 2000 = 0.5 ms / 5000 = 0.2 ms / 10000 = 0.1 ms
+// Use lowest resolution possible to minimize side effects on AltSoftSerial
+#define TWIZY_TIMER2_RESOLUTION   1000
+
 // Set your MCP clock frequency here:
 #define TWIZY_CAN_MCP_FREQ        MCP_16MHZ
 
 // Set your SPI CS pin number here:
 #define TWIZY_CAN_CS_PIN          10
 
-// If you've connected the CAN module's IRQ pin:
+// Uncomment if you've connected the CAN module's IRQ pin:
 //#define TWIZY_CAN_IRQ_PIN       2
 
 // Set your 3MW (ECU_OK) control pin here:

examples/Template/TwizyVirtualBMS_config.h

@@ -20,13 +20,22 @@
 // You may need to lower this if your Arduino is too slow.
 #define TWIZY_CAN_CLOCK_US        10000
 
+// VirtualBMS can use Timer1 (16 bit), Timer2 (8 bit) or Timer3 (16bit)
+// Select Timer2/3 if you need Timer1 for e.g. AltSoftSerial
+#define TWIZY_USE_TIMER           1
+
+// Timer2: precise resolutions depend on CPU type & clock frequency
+// i.e. Arduino Nano 16 MHz: 1000 = 1 ms / 2000 = 0.5 ms / 5000 = 0.2 ms / 10000 = 0.1 ms
+// Use lowest resolution possible to minimize side effects on AltSoftSerial
+#define TWIZY_TIMER2_RESOLUTION   1000
+
 // Set your MCP clock frequency here:
 #define TWIZY_CAN_MCP_FREQ        MCP_16MHZ
 
 // Set your SPI CS pin number here:
 #define TWIZY_CAN_CS_PIN          10
 
-// If you've connected the CAN module's IRQ pin:
+// Uncomment if you've connected the CAN module's IRQ pin:
 //#define TWIZY_CAN_IRQ_PIN       2
 
 // Set your 3MW (ECU_OK) control pin here:

keywords.txt

@@ -25,6 +25,7 @@ setSOC	KEYWORD2
 setTemperature	KEYWORD2
 setVoltage	KEYWORD2
 setCurrent	KEYWORD2
+setCurrentQA	KEYWORD2
 setError	KEYWORD2
 
 attachEnterState	KEYWORD2

library.properties

@@ -1,5 +1,5 @@
 name=Twizy Virtual BMS
-version=1.0.0
+version=1.1.0
 author=Michael Balzer
 maintainer=Michael Balzer <dexter@dexters-web.de>
 sentence=Emulation of Renault Twizy BMS (battery management system)

src/TwizyVirtualBMS.h

@@ -21,7 +21,10 @@
  * 
  * Libraries used:
  *  - MCP_CAN: https://github.com/coryjfowler/MCP_CAN_lib
+ * …plus one of…
  *  - TimerOne: https://github.com/PaulStoffregen/TimerOne
+ *  - FlexiTimer2: https://github.com/PaulStoffregen/FlexiTimer2
+ *  - TimerThree: https://github.com/PaulStoffregen/TimerThree
  * 
  * Licenses:
  *  This is free software and information under the following licenses:
@@ -35,24 +38,37 @@
 #ifndef _TwizyVirtualBMS_h
 #define _TwizyVirtualBMS_h
 
+#define TWIZY_VBMS_VERSION		"V1.1.0 (2017-06-20)"
+
+#ifndef TWIZY_TAG
+#define TWIZY_TAG							"twizy."
+#endif
+
 #include <Arduino.h>
 #include <avr/pgmspace.h>
 
 #include <mcp_can.h>
 #include <mcp_can_dfs.h>
+
+#ifndef TWIZY_USE_TIMER
+#define TWIZY_USE_TIMER 1
+#endif
+
+#if TWIZY_USE_TIMER == 1
 #include <TimerOne.h>
+#elif TWIZY_USE_TIMER == 2
+#include <FlexiTimer2.h>
+#elif TWIZY_USE_TIMER == 3
+#include <TimerThree.h>
+#else
+#error "TWIZY_USE_TIMER invalid, please set to 1, 2 or 3!"
+#endif
 
 #ifndef _TwizyVirtualBMS_config_h
 #warning "Fallback to default TwizyVirtualBMS_config.h -- you should copy this into your sketch folder"
 #include "TwizyVirtualBMS_config.h"
 #endif
 
-#define TWIZY_VBMS_VERSION		"V1.0.0 (2017-06-17)"
-
-#ifndef TWIZY_TAG
-#define TWIZY_TAG							"twizy."
-#endif
-
 
 // ==========================================================================
 // TYPES AND CONSTANTS
@@ -78,7 +94,7 @@ enum TwizyState {
 
 // Twizy state names:
 #if TWIZY_DEBUG_LEVEL >= 1
-const char PROGMEM twizyStateName[13][13] = {
+const char twizyStateName[13][13] PROGMEM = {
 	"Off",
 	"Init",
 	"Error",
@@ -181,6 +197,7 @@ public:
 	// Model access:
 	bool setChargeCurrent(int amps);
 	bool setCurrent(float amps);
+	bool setCurrentQA(long quarterAmps);
 	bool setSOC(float soc);
 	bool setPowerLimits(unsigned int drive, unsigned int recup);
 	bool setSOH(int soh);
@@ -347,6 +364,16 @@ bool TwizyVirtualBMS::setCurrent(float amps) {
   return true;
 }
 
+// Set battery pack current level (native 1/4 A resolution)
+//  milliamps: -2000 .. +2000 (positive = charge, negative = discharge)
+bool TwizyVirtualBMS::setCurrentQA(long quarterAmps) {
+	CHECKLIMIT(quarterAmps, -2000L, 2000L);
+	unsigned int level = 2000 + quarterAmps;
+	id155[1] = (id155[1] & 0xf0) | ((level & 0x0f00) >> 8);
+	id155[2] = level & 0x00ff;
+	return true;
+}
+
 // Set battery pack SOC
 //  soc: 0.00 .. 100.00
 // Note: the charger will not start charging at SOC=100%
@@ -962,8 +989,27 @@ void TwizyVirtualBMS::begin() {
   
 	enterState(Off);
 	
-  Timer1.initialize(TWIZY_CAN_CLOCK_US);
+	#if TWIZY_USE_TIMER == 1
-  Timer1.attachInterrupt(twizyClockISR);
+	
+	// Use Timer1 (16 bit):
+	Timer1.initialize(TWIZY_CAN_CLOCK_US);
+	Timer1.attachInterrupt(twizyClockISR);
+
+	#elif TWIZY_USE_TIMER == 2
+	
+	// Use Timer2 (8 bit): derive count from resolution:
+	FlexiTimer2::set(TWIZY_CAN_CLOCK_US / (1000000UL / TWIZY_TIMER2_RESOLUTION),
+										1.0 / TWIZY_TIMER2_RESOLUTION,
+										twizyClockISR);
+	FlexiTimer2::start();
+	
+	#else
+	
+	// Use Timer3 (16 bit):
+	Timer3.initialize(TWIZY_CAN_CLOCK_US);
+	Timer3.attachInterrupt(twizyClockISR);
+	
+	#endif
   
 	Serial.println(F(TWIZY_TAG "begin: done"));
   

src/TwizyVirtualBMS_config.h

@@ -20,13 +20,22 @@
 // You may need to lower this if your Arduino is too slow.
 #define TWIZY_CAN_CLOCK_US        10000
 
+// VirtualBMS can use Timer1 (16 bit), Timer2 (8 bit) or Timer3 (16bit)
+// Select Timer2/3 if you need Timer1 for e.g. AltSoftSerial
+#define TWIZY_USE_TIMER           1
+
+// Timer2: precise resolutions depend on CPU type & clock frequency
+// i.e. Arduino Nano 16 MHz: 1000 = 1 ms / 2000 = 0.5 ms / 5000 = 0.2 ms / 10000 = 0.1 ms
+// Use lowest resolution possible to minimize side effects on AltSoftSerial
+#define TWIZY_TIMER2_RESOLUTION   1000
+
 // Set your MCP clock frequency here:
 #define TWIZY_CAN_MCP_FREQ        MCP_16MHZ
 
 // Set your SPI CS pin number here:
 #define TWIZY_CAN_CS_PIN          10
 
-// If you've connected the CAN module's IRQ pin:
+// Uncomment if you've connected the CAN module's IRQ pin:
 //#define TWIZY_CAN_IRQ_PIN       2
 
 // Set your 3MW (ECU_OK) control pin here: