Merge pull request arduino#37 from fallberg/development

Fix for W5100 Ethernet module

Author: henrikekblad

.gitignore

@@ -0,0 +1 @@
+stino.settings

libraries/MySensors/examples/EthernetGateway/EthernetGateway.ino

@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2013 Henrik Ekblad <henrik.ekblad@gmail.com>
  * 
- * Contribution by a-lurker
+ * Contribution by a-lurker and Anticimex
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -42,6 +42,7 @@
  *  7   Radio error LED                   (optional)  +5V -> LED -> 270-330 Ohm resistor -> pin 7.
  *  6   Radio SPI Slave Select
  *  5   Radio Chip Enable
+ *  4   Ethernet SPI Enable               (optional if using a shield/module that manages SPI_EN signal)
  *  3   Inclusion mode button             (optional) GND-> Button -> Pin3
  *  2   Radio IRQ pin                     (optional) 
  * ----------------------------------------------------------------------------------------------------------- 
@@ -67,6 +68,7 @@
 #define INCLUSION_MODE_TIME 1 // Number of minutes inclusion mode is enabled
 #define INCLUSION_MODE_PIN  3 // Digital pin used for inclusion mode button
 
+#define W5100_SPI_EN        4  // Ethernet SPI enable
 #define RADIO_CE_PIN        5  // radio chip enable
 #define RADIO_SPI_SS_PIN    6  // radio SPI serial select
 
@@ -93,26 +95,46 @@ EthernetServer server = EthernetServer(IP_PORT);
 char inputString[MAX_RECEIVE_LENGTH] = "";    // A string to hold incoming commands from serial/ethernet interface
 int inputPos = 0;
 
+void w5100_spi_en(boolean enable)
+{
+#ifdef W5100_SPI_EN
+  if (enable)
+  {
+    // Pull up pin
+    pinMode(W5100_SPI_EN, INPUT);
+    digitalWrite(W5100_SPI_EN, HIGH);
+  }
+  else
+  {
+    // Ground pin
+    pinMode(W5100_SPI_EN, OUTPUT);
+    digitalWrite(W5100_SPI_EN, LOW);
+  }
+#endif
+}
 
 void output(const char *fmt, ... ) {
    va_list args;
    va_start (args, fmt );
    vsnprintf_P(serialBuffer, MAX_SEND_LENGTH, fmt, args);
    va_end (args);
    Serial.print(serialBuffer);
+   w5100_spi_en(true);
    server.write(serialBuffer);
+   w5100_spi_en(false);
 }
 
-
 void setup()  
 { 
+  w5100_spi_en(false);
   // Initialize gateway at maximum PA level, channel 70 and callback for write operations 
   gw.begin(incomingMessage, 0, true, 0, RF24_PA_LEVEL_GW, RF24_CHANNEL, RF24_DATARATE);
    // Setup pipes for radio library
   gw.openReadingPipe(WRITE_PIPE, BASE_RADIO_ID);
   gw.openReadingPipe(CURRENT_NODE_PIPE, BASE_RADIO_ID);
   gw.startListening();
-  
+ 
+  w5100_spi_en(true);
   Ethernet.begin(mac, myIp);
   setupGateway(RADIO_RX_LED_PIN, RADIO_TX_LED_PIN, RADIO_ERROR_LED_PIN, INCLUSION_MODE_PIN, INCLUSION_MODE_TIME, output);
 
@@ -128,6 +150,7 @@ void setup()
 
   // start listening for clients
   server.begin();
+  w5100_spi_en(false);
 
   //output(PSTR("0;0;%d;0;%d;Gateway startup complete.\n"),  C_INTERNAL, I_GATEWAY_READY);
 
@@ -144,6 +167,7 @@ void loop()
 
   // if an incoming client connects, there will be
   // bytes available to read via the client object
+  w5100_spi_en(true);
   EthernetClient client = server.available();
 
   if (client) {
@@ -163,6 +187,7 @@ void loop()
               // echo the string to the serial port
               Serial.print(inputString);
 
+              w5100_spi_en(false);
               parseAndSend(gw, inputString);
 
               // clear the string:
@@ -178,8 +203,7 @@ void loop()
         }
       }
    } 
+  w5100_spi_en(false);
 }
 
 
-
-