update examples

examples/receive_interrupt/receive_interrupt.ino

@@ -5,10 +5,14 @@
 #include <SPI.h>
 #include "mcp_can.h"
 
-MCP_CAN CAN(10);                                            // Set CS to pin 10
+// 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 = 9;
+
+MCP_CAN CAN(SPI_CS_PIN);                                    // Set CS pin
 
 
-unsigned char Flag_Recv = 0;
+unsigned char flagRecv = 0;
 unsigned char len = 0;
 unsigned char buf[8];
 char str[20];
@@ -17,7 +21,7 @@ void setup()
 {
     Serial.begin(115200);
 
-START_INIT:
+    START_INIT:
 
     if(CAN_OK == CAN.begin(CAN_500KBPS))                   // init can bus : baudrate = 500k
     {
@@ -30,36 +34,39 @@ START_INIT:
         delay(100);
         goto START_INIT;
     }
-    
+
     attachInterrupt(0, MCP2515_ISR, FALLING); // start interrupt
 }
 
 void MCP2515_ISR()
 {
-     Flag_Recv = 1;
+    flagRecv = 1;
 }
 
 void loop()
 {
-  if(Flag_Recv) {                   // check if get data
-    
-    Flag_Recv = 0;                // clear flag
-    
-    // iterate over all pending messages
-    // If either the bus is saturated or the MCU is busy,
-    // both RX buffers may be in use and reading a single
-    // message does not clear the IRQ conditon.
-    while (CAN_MSGAVAIL == CAN.checkReceive()) {
-      // read data,  len: data length, buf: data buf
-      CAN.readMsgBuf(&len, buf);
-      
-      // print the data
-      for(int i = 0; i<len; i++) {
-	Serial.print(buf[i]);Serial.print("\t");
-      }
-      Serial.println();
-    } 
-  }
+    if(flagRecv) 
+    {                                   // check if get data
+
+        flagRecv = 0;                   // clear flag
+
+        // iterate over all pending messages
+        // If either the bus is saturated or the MCU is busy,
+        // both RX buffers may be in use and reading a single
+        // message does not clear the IRQ conditon.
+        while (CAN_MSGAVAIL == CAN.checkReceive()) 
+        {
+            // read data,  len: data length, buf: data buf
+            CAN.readMsgBuf(&len, buf);
+
+            // print the data
+            for(int i = 0; i<len; i++)
+            {
+                Serial.print(buf[i]);Serial.print("\t");
+            }
+            Serial.println();
+        }
+    }
 }
 
 /*********************************************************************************************************