Diff: Xbee.cpp

Revision:

0:f8873e0badb2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Xbee.cpp	Thu Feb 18 13:22:31 2016 +0000
@@ -0,0 +1,90 @@
+#include "mbed.h"
+#include "Xbee.h"
+
+// Fonction d'assignation du PAN ID
+void setPanId(Serial* xbee, long long panId)
+{
+    // Construction de la trame
+    const int frameLength = 16;
+    char frame[frameLength];
+    frame[0] = 0x7E; // Start delimiter
+    frame[1] = 0x00; // Length (MSB)
+    frame[2] = 0x0C; // Length (LSB)
+    frame[3] = 0x08; // AT Command
+    frame[4] = 0x00; // Frame ID
+    frame[5] = 'I';
+    frame[6] = 'D';
+    frame[7] = (panId >> 56) & 0xFF;
+    frame[8] = (panId >> 48) & 0xFF;
+    frame[9] = (panId >> 40) & 0xFF;
+    frame[10] = (panId >> 32) & 0xFF;
+    frame[11] = (panId >> 24) & 0xFF;
+    frame[12] = (panId >> 16) & 0xFF;
+    frame[13] = (panId >> 8) & 0xFF;
+    frame[14] = (panId >> 0) & 0xFF;
+    frame[15] = checksum(frame, 3, 15);
+
+    // Envoi sur le UART
+    if (xbee->writeable())
+    {
+        for (int i = 0; i < frameLength; i++)
+        {
+            xbee->putc(frame[i]);
+        }
+    }
+}
+
+// Envoi d'un message au coordinateur (Transmit Request)
+void transmitRequest(Serial* xbee, char* data, int size)
+{
+    // Construction de la trame
+    const int frameLength = 18 + size;
+    char frame[frameLength];
+    frame[0] = 0x7E; // Start delimiter
+    frame[1] = 0x00; // Length (MSB)
+    frame[2] = 0x0E + size; // Length (LSB)
+    frame[3] = 0x10; // AT Command
+    frame[4] = 0x01; // Frame ID
+    frame[5] = (MAC_ADDRESS_COORDINATOR >> 56) & 0xFF;
+    frame[6] = (MAC_ADDRESS_COORDINATOR >> 48) & 0xFF;
+    frame[7] = (MAC_ADDRESS_COORDINATOR >> 40) & 0xFF;
+    frame[8] = (MAC_ADDRESS_COORDINATOR >> 32) & 0xFF;
+    frame[9] = (MAC_ADDRESS_COORDINATOR >> 24) & 0xFF;
+    frame[10] = (MAC_ADDRESS_COORDINATOR >> 16) & 0xFF;
+    frame[11] = (MAC_ADDRESS_COORDINATOR >> 8) & 0xFF;
+    frame[12] = (MAC_ADDRESS_COORDINATOR >> 0) & 0xFF;
+    frame[13] = 0xFF; // Broadcast
+    frame[14] = 0xFE; // Broadcast
+    frame[15] = 0x00; // Broadcast radius
+    frame[16] = 0x00; // Options
+
+    // Ajout des données utiles
+    for (int i = 0; i < size; i++)
+    {
+        frame[17 + i] = data[i];
+    }
+    frame[17 + size] = checksum(frame, 3, 17 + size);
+    
+    // Envoi sur le UART
+    if (xbee->writeable())
+    {
+        for (int i = 0; i < frameLength; i++)
+        {
+            xbee->putc(frame[i]);
+        }
+    }
+}
+
+// Fonction de calcul de checksum
+char checksum(char* frame, int begin, int end)
+{
+    char sum = 0;
+
+    // Addition des bits
+    for (int i = begin; i < end; i++)
+    {
+        sum += frame[i];
+    }
+    
+    return 0xFF - sum;
+}