Revision 0:f1fc262e9984, committed 2011-02-24

Comitter:

simon

Date:

Thu Feb 24 18:37:28 2011 +0000

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 24 18:37:28 2011 +0000
@@ -0,0 +1,54 @@
+#include "mbed.h"
+
+Ethernet eth;
+
+#define NPACKETS 100000
+#define NBYTES 1000
+
+__packed struct EthPkt {  
+    char   dest[6];
+    char   src[6]; 
+    unsigned short  type;   
+};
+
+unsigned short htons(unsigned short n) {                // Host short to network short byte swapping
+    return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);     
+}
+
+char data[NBYTES];
+
+
+
+
+
+int main() {
+    printf("Hello Ethernet Tx Benchmark!\n");
+
+    // fill the data with ascending pattern, inc packet header
+    for(int i=0; i<NBYTES; i++) {
+        data[i] = i;
+    }
+    EthPkt *pkt = (EthPkt*)&data[0];
+    eth.address(pkt->src);          // note, this call goes to the mbed interface, so takes a while
+    for(int i = 0; i<6; i++) { 
+        pkt->dest[i] = 0xFF; 
+    }
+
+    while(!eth.link());
+
+    printf("Sending %d packets of %d bytes...\n", NPACKETS, NBYTES);
+
+    Timer t;
+    t.start();
+    for(int i = 0; i < NPACKETS; i++) {
+        eth.write(data, NBYTES);                     
+        eth.send();                                 
+    }
+    t.stop();
+
+    printf("Time = %.2f seconds\n", t.read());
+    
+    float bw = NPACKETS * NBYTES * 8 / t.read();
+    printf("bandwidth = %.2f kbps\n", bw / 1024.0);
+    
+}