Detect version of bridge.py running on the Yun.

Author: cmaglie

libraries/Bridge/src/Bridge.cpp

@@ -57,9 +57,9 @@ void BridgeClass::begin() {
 
     // Reset the brigde to check if it is running
     uint8_t cmd[] = {'X', 'X', '1', '0', '0'};
-    uint8_t res[1];
+    uint8_t res[4];
     max_retries = 50;
-    uint16_t l = transfer(cmd, 5, res, 1);
+    uint16_t l = transfer(cmd, 5, res, 4);
     if (l == TRANSFER_TIMEOUT) {
       // Bridge didn't start...
       // Maybe the board is starting-up?
@@ -71,6 +71,14 @@ void BridgeClass::begin() {
     if (res[0] != 0)
       while (true);
 
+    // Detect bridge version
+    if (l == 4) {
+      bridgeVersion = (res[1]-'0')*100 + (res[2]-'0')*10 + (res[3]-'0');
+    } else {
+      // Bridge v1.0.0 didn't send any version info
+      bridgeVersion = 100;
+    }
+
     max_retries = 50;
     return;
   }

libraries/Bridge/src/Bridge.h

@@ -61,12 +61,18 @@ class BridgeClass {
       return transfer(buff1, len1, buff2, len2, NULL, 0, rxbuff, rxlen);
     }
 
+    uint16_t getBridgeVersion()
+    {
+      return bridgeVersion;
+    }
+
     static const int TRANSFER_TIMEOUT = 0xFFFF;
 
   private:
     uint8_t index;
     int timedRead(unsigned int timeout);
     void dropAll();
+    uint16_t bridgeVersion;
 
   private:
     void crcUpdate(uint8_t c);