1st twai version with send/receive

lib/nmea2ktwai/Nmea2kTwai.h

@@ -0,0 +1,27 @@
+#ifndef _NMEA2KTWAI_H
+#define _NMEA2KTWAI_H
+#include "NMEA2000.h"
+#include "GwLog.h"
+
+class Nmea2kTwai : public tNMEA2000{
+    public:
+        Nmea2kTwai(gpio_num_t _TxPin,  gpio_num_t _RxPin,GwLog *logger);
+    protected:
+    // Virtual functions for different interfaces. Currently there are own classes
+    // for Arduino due internal CAN (NMEA2000_due), external MCP2515 SPI CAN bus controller (NMEA2000_mcp),
+    // Teensy FlexCAN (NMEA2000_Teensy), NMEA2000_avr for AVR, NMEA2000_mbed for MBED and NMEA2000_socketCAN for e.g. RPi.
+    virtual bool CANSendFrame(unsigned long id, unsigned char len, const unsigned char *buf, bool wait_sent=true);
+    virtual bool CANOpen();
+    virtual bool CANGetFrame(unsigned long &id, unsigned char &len, unsigned char *buf);
+    // This will be called on Open() before any other initialization. Inherit this, if buffers can be set for the driver
+    // and you want to change size of library send frame buffer size. See e.g. NMEA2000_teensy.cpp.
+    virtual void InitCANFrameBuffers();
+
+    private:
+    gpio_num_t TxPin;  
+    gpio_num_t RxPin;
+    GwLog *logger;
+
+};
+
+#endif