CurieMailbox/examples/String.ino: receive on all channels

Also, add public 'numChannels' constant to CurieMailbox class, so all
channels can be easily iterated over

Author: eriknyquist

libraries/CurieMailbox/examples/String/String.ino

@@ -15,23 +15,23 @@
 
 #include "CurieMailbox.h"
 
-int receiveChannel = 0;  /* Receiving messages on this channel */
-
 void setup (void) {
     Serial.begin(9600);
 
     /* Enable the mailbox */
     CurieMailbox.begin();
 
-    /* Enable channel for receiving messages */
-    CurieMailbox.enableReceive(receiveChannel);
+    /* Enable all channels for receiving messages */
+    for (int i = 0; i < CurieMailbox.numChannels; ++i) {
+        CurieMailbox.enableReceive(i);
+    }
 }
 
 void printMessageAsString (CurieMailboxMsg msg)
 {
     char *p = (char *)msg.data;
-    Serial.print("Received message '" + String(p) + "' from channel ");
-    Serial.println(msg.channel);
+    Serial.print("Received message from channel " + String(msg.channel) + ": ");
+    Serial.println(String(p));
 }
 
 void loop (void) {

libraries/CurieMailbox/src/CurieMailbox.cpp

@@ -4,15 +4,15 @@
 #include "CurieMailbox.h"
 
 #define BUFSIZE                     33
-#define NUM_CHANNELS                8
 #define CHANNEL_STS_MASK            0x1
 #define CHANNEL_INT_MASK            0x2
 #define CTRL_WORD_MASK              0x7FFFFFFF
 #define CHALL_STATUS_MASK           0xFFFF
 #define CHANNEL_STS_BITS            (CHANNEL_STS_MASK | CHANNEL_INT_MASK)
 
-#define CAP_CHAN(chan)              chan = (chan >= NUM_CHANNELS) ? \
-                                    NUM_CHANNELS - 1 : ((chan < 0) ? 0 : chan)
+#define CAP_CHAN(chan)              chan = (chan >= CurieMailbox.numChannels) ?\
+                                    CurieMailbox.numChannels - 1 : ((chan < 0) \
+                                    ? 0 : chan)
 
 /* Mailbox channel status register */
 #define IO_REG_MAILBOX_CHALL_STS    (SCSS_REGISTER_BASE + 0xAC0)
@@ -122,7 +122,7 @@ static void mbox_isr (void)
 
     sts = get_chall_sts();
     /* Get channel number */
-    for (i = 0; i < NUM_CHANNELS; ++i) {
+    for (i = 0; i < CurieMailbox.numChannels; ++i) {
         if (sts & (1 << (i * 2 + 1))) {
             break;
         }
@@ -135,7 +135,7 @@ static void mbox_hardware_init (void)
 {
     int i;
 
-    for (i = 0; i < NUM_CHANNELS; ++i) {
+    for (i = 0; i < CurieMailbox.numChannels; ++i) {
         mbox[i].sts &= ~(CHANNEL_STS_BITS);
     }
 }

libraries/CurieMailbox/src/CurieMailbox.h

@@ -5,6 +5,8 @@
 
 class CurieMailboxClass {
 public:
+    const int numChannels = 8;
+
     CurieMailboxClass (void);
     void begin (void);
     void begin (bool master);