Merge pull request #6 from orenergy/MCP_8MHZ

Allow to set oscillator clock for 8/20MHZ modules

Author: autowp

CanHacker.cpp

@@ -54,8 +54,12 @@ Stream *CanHacker::getInterfaceStream() {
     return _stream;
 }
 
+void CanHacker::setClock(CAN_CLOCK clock){
+    canClock = clock;
+}
+
 CanHacker::ERROR CanHacker::connectCan() {
-    MCP2515::ERROR error = mcp2515->setBitrate(bitrate);
+    MCP2515::ERROR error = mcp2515->setBitrate(bitrate, canClock);
     if (error != MCP2515::ERROR_OK) {
         writeDebugStream(F("setBitrate error:\n"));
         writeDebugStream((int)error);

CanHacker.h

@@ -47,6 +47,7 @@ class CanHacker {
 
         CanHacker(Stream *stream, Stream *debugStream, uint8_t cs);
         ~CanHacker();
+        void setClock(const CAN_CLOCK clock);
         ERROR receiveCommand(const char *buffer, const int length);
         ERROR receiveCanFrame(const struct can_frame *frame);
         ERROR sendFrame(const struct can_frame *);
@@ -64,6 +65,7 @@ class CanHacker {
         static const char BEL = 7;
         static const uint16_t TIMESTAMP_LIMIT = 0xEA60;
 
+        CAN_CLOCK canClock = MCP_16MHZ;
         bool _timestampEnabled = false;
         bool _listenOnly = false;
         bool _loopback = false;

README.md

@@ -12,6 +12,7 @@ Implement communication with CAN bus via MCP2515 by CanHacker (lawicel) protocol
 - supports filter by ID (mask + code)
 - interface using [Stream](https://www.arduino.cc/en/Reference/Stream): ability to work with Serial, SoftwareSerial, Ethernet and other
 - supported can baudrates from 10Kbps up to 1Mbps
+- supported modules with different oscillators (8, 16, 20 MHZ), 16 MHZ is default, use setClock if your oscillator is not 16MHZ
 - support [CanHacker](http://www.mictronics.de/projects/usb-can-bus/) (application for Windows)
 - support [CANreader](https://github.com/autowp/CANreader) (application for Android)
 

docs/en/README.md

@@ -12,6 +12,7 @@ Implement communication with CAN bus via MCP2515 by CanHacker (lawicel) protocol
 - supports filter by ID (mask + code)
 - interface using [Stream](https://www.arduino.cc/en/Reference/Stream): ability to work with Serial, SoftwareSerial, Ethernet and other
 - supported can baudrates from 10Kbps up to 1Mbps
+- supported modules with different oscillators (8, 16, 20 MHZ), 16 MHZ is default, use setClock if your oscillator is not 16MHZ
 - support [CanHacker](http://www.mictronics.de/projects/usb-can-bus/) (application for Windows)
 - support [CANreader](https://github.com/autowp/CANreader) (application for Android)
 

docs/ru/README.md

@@ -12,6 +12,7 @@
 - поддержка фильтра по ID (маска + код)
 - интерфейс, работающий со [Stream](https://www.arduino.cc/en/Reference/Stream): возможность работы с Serial, SoftwareSerial, Ethernet и другими интерфейсами 
 - поддерживаемые скорости can шины от 10Kbps до 1Mbps
+- поддерживаются модули с разными кварцами - 8, 16, 20 МГц. По умолчанию установлена частота 16 МГц, используйте функцию setClock если у вас модуль с другим кварцем.
 - поддержка [CanHacker](http://www.mictronics.de/projects/usb-can-bus/) (приложение для Windows)
 - поддержка [CANreader](https://github.com/autowp/CANreader) (приложение для Android)