Refactor pingpair_test to remove all serial io from within the irq handler, as necessitated by Arduino 1.0

tests/pingpair_test/pingpair_test.pde

@@ -230,7 +230,7 @@ void setup(void)
   // Dump the configuration of the rf unit for debugging
   //
 
-  radio.printDetails();
+  //radio.printDetails();
 
   //
   // Attach interrupt handler to interrupt #0 (using pin 2)
@@ -238,8 +238,23 @@ void setup(void)
   //
 
   attachInterrupt(0, check_radio, FALLING);
+  
+  if ( role == role_receiver )
+    printf("\n\r+OK ");
 }
 
+//
+// Print buffer
+//
+// Printing from the interrupt handler is a bad idea, so we print from there
+// to this intermediate buffer
+//
+
+char prbuf[1000];
+char *prbuf_end = prbuf + sizeof(prbuf);
+char *prbuf_in = prbuf;
+char *prbuf_out = prbuf;
+
 //
 // Loop 
 //
@@ -274,7 +289,7 @@ void loop(void)
     delay(interval);
     
     // Timeout if we have not received anything back ever
-    if ( ! last_message_count && millis() > interval * 10 )
+    if ( ! last_message_count && millis() > interval * 100 )
     {
       printf("No responses received.  Are interrupts connected??\n\r");
       done = true;
@@ -285,6 +300,17 @@ void loop(void)
   // Receiver role: Does nothing!  All the work is in IRQ
   //
   
+  //
+  // Spew print buffer
+  //
+
+  size_t write_length = prbuf_in - prbuf_out;
+  if ( write_length )
+  {
+    Serial.write(reinterpret_cast<uint8_t*>(prbuf_out),write_length);
+    prbuf_out += write_length;
+  }
+  
   //
   // Stop the test if we're done and report results
   //
@@ -299,8 +325,6 @@ void loop(void)
       printf("FAIL\n\r\n\r");
   }
 
-  //
-  //
 }
 
 void check_radio(void)
@@ -313,10 +337,10 @@ void check_radio(void)
   if ( tx )
   {
     if ( role == role_sender )
-      printf("Send:OK ");
+      prbuf_in += sprintf(prbuf_in,"Send:OK ");
 
     if ( role == role_receiver )
-      printf("Ack Payload:Sent\n\r");
+      prbuf_in += sprintf(prbuf_in,"Ack Payload:Sent\n\r");
   }
 
   // Have we failed to transmit?
@@ -324,14 +348,14 @@ void check_radio(void)
   {
     if ( role == role_sender )
     {
-      printf("Send:Failed ");
+      prbuf_in += sprintf(prbuf_in,"Send:Failed ");
 
       // log status of this line
       one_failed();
     }
 
     if ( role == role_receiver )
-      printf("Ack Payload:Failed\n\r");
+      prbuf_in += sprintf(prbuf_in,"Ack Payload:Failed\n\r");
   }
 
   // Transmitter can power down for now, because
@@ -346,19 +370,19 @@ void check_radio(void)
     if ( role == role_sender )
     {
       radio.read(&message_count,sizeof(message_count));
-      printf("Ack:%lu ",message_count);
+      prbuf_in += sprintf(prbuf_in,"Ack:%lu ",message_count);
      
       // is this ack what we were expecting?  to account
       // for failures, we simply want to make sure we get a
       // DIFFERENT ack every time.
       if ( ( message_count != last_message_count ) || ( configuration=='3' && message_count == 16 ) )
       {
-	printf("OK ");
+	prbuf_in += sprintf(prbuf_in,"OK ");
 	one_ok();
       }
       else
       {
-	printf("FAILED ");
+	prbuf_in += sprintf(prbuf_in,"FAILED ");
 	one_failed();
       }
       last_message_count = message_count;
@@ -382,7 +406,7 @@ void check_radio(void)
       receive_payload[len] = 0;
 
       // Spew it
-      printf("Got payload size=%i value=%s strlen=%u\n\r",len,receive_payload,strlen(receive_payload));
+      prbuf_in += sprintf(prbuf_in,"Recv size=%i val=%s len=%u\n\r",len,receive_payload,strlen(receive_payload));
 
       // Add an ack packet for the next time around.
       // Here we will report back how many bytes we got this time.