Add canbus FD send example

examples/sendFD/sendFD.ino

@@ -0,0 +1,58 @@
+// demo: CAN-BUS Shield, send data
+// loovee@seeed.cc
+
+
+#include <SPI.h>
+#include "mcp2518fd_can.h"
+
+/*SAMD core*/
+#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE
+    #define SERIAL SerialUSB
+#else
+    #define SERIAL Serial
+#endif
+
+
+#define CAN_2518FD
+// the cs pin of the version after v1.1 is default to D9
+// v0.9b and v1.0 is default D10
+const int SPI_CS_PIN = BCM8;
+
+#ifdef CAN_2518FD
+mcp2518fd CAN(SPI_CS_PIN); // Set CS pin
+#endif
+
+void setup() {
+    SERIAL.begin(115200);
+    while(!Serial){};
+    CAN.setMode(0);
+    while (0 != CAN.begin((byte)CAN_500K_1M)) {            // init can bus : baudrate = 500k     
+        SERIAL.println("CAN BUS Shield init fail");
+        SERIAL.println(" Init CAN BUS Shield again");
+        delay(100);
+    }
+    byte mode = CAN.getMode();
+    SERIAL.printf("CAN BUS get mode = %d\n\r",mode);
+    SERIAL.println("CAN BUS Shield init ok!");
+}
+
+unsigned char stmp[64] = {0};
+void loop() {
+    // send data:  id = 0x00, standrad frame, data len = 8, stmp: data buf
+    stmp[63] = stmp[63] + 1;
+    if (stmp[63] == 100) {
+        stmp[63] = 0;
+        stmp[63] = stmp[63] + 1;
+
+        if (stmp[6] == 100) {
+            stmp[6] = 0;
+            stmp[5] = stmp[6] + 1;
+        }
+    }
+
+    CAN.sendMsgBuf(0x00, 0, 15, stmp);
+    delay(100);                       // send data per 100ms
+    SERIAL.println("CAN BUS sendMsgBuf ok!");
+}
+
+// END FILE