added digital read and digital listing functions

CHANGELOG

@@ -7,6 +7,7 @@ Version 0.3 (23 July, 2011)
 * refactored all the printing to use a generic Print object so won't matter if you use Serial or Ethernet
 * added global ethclient var so ethernet functions have access to them.
 * added a heap of anti-telnet garbling code to command parser.
+* added digital read and list all digital pin functions
 
 
 Version 0.2 (22 July, 2011)

README.rst

@@ -30,7 +30,7 @@ Issues should be raised as via the issue tracker at GitHub on the link above.
 To Do:
 ------
 
-* Add digital read
 * add ability to cycle from one state to another via pwm shifting
 * be able to set network params
 * move everything to a library to make it more useful
+* refactor ls, read and write functions to be more generic and free up some space.

arduino_command_server_pde/arduino_command_server_pde.pde

@@ -50,8 +50,10 @@ void setup() {
   com[2]=(Command){"ANR", "Reads a specific analog pin", command_analog_read};
   com[3]=(Command){"ANW", "Writes to an analog pin", command_analog_write};
   com[4]=(Command){"PINM", "Sets the mode of a digital pin [pin IN|OUT]", command_setmode};
-  com[5]=(Command){"DIGW", "Writes to the digital pin", command_digital_write};
-  com[6]=(Command){"QUIT", "Quits this session gracefully", command_quit};
+  com[5]=(Command){"LSD", "Lists status of all digital pins", command_list_digital};
+  com[6]=(Command){"DIGW", "Writes to the digital pin", command_digital_write};
+  com[7]=(Command){"DIGR", "Reads the specified digital pin", command_digital_read};
+  com[8]=(Command){"QUIT", "Quits this session gracefully", command_quit};
 
 }
 
@@ -281,6 +283,38 @@ void command_setmode(String args) {
   client->println("503 Please use IN or OUT only");
 }
 
+void command_list_digital(String args) {
+  // list the current status of all the analog pins.
+  client->println("200 Digital Read all pins");
+  client->println("210 If using ethernet pins 10-13 are used");
+  for (int i=0; i<20; i++) {
+    client->print("211 D");
+    client->print(i);
+    client->print(" ");
+    client->println(digitalRead(i));
+  }
+}
+
+void command_digital_read(String args) {
+    // reads a specified digital pin
+    // argument passed in should simply be a number and it's that one we read.
+    // we do need to get both chars though because it can be 2 digits
+    if (args.length() <= 0) {
+      client->println("501 Pin number not supplied");
+      return;
+    }
+    if (args.length() > 2) {
+      client->println("502 Pin range too high or incorrect");
+      return;
+    }
+    // just convert it and if it gets something nasty it will go to zero.
+    int pin = atoi(&args[0]);
+    client->print("200 Digital read pin #");
+    client->println(pin);
+    client->print("211 ");
+    client->println(digitalRead((pin)));
+}
+
 void command_digital_write (String args) {
   // sets a digital pin high or low based on what value is passed.
   // params are the pin number then HIGH or LOW