Stephen Dickey / Mbed 2 deprecated C027_ModemTransparentUSBCDC_revb

For RevB MBED Hardware, with the new boot sequence. This example establishes a transparent link between the mbed USB CDC port and the modem (LISA) on the C027. You can use it to use the standard u-blox tools such as m-center or any terminal program. These tools can then connect to the serial port and talk directly to the modem. Baudrate should be set to 115200 baud and is fixed. m-center can be downloaded from u-blox website following this link: http://www.u-blox.com/en/evaluation-tools-a-software/u-center/m-center.html

Dependencies:   C027-REVB UbloxUSBModem mbed

Files at this revision

API Documentation at this revision

Revision 2:c4ad86683060, committed 2013-12-14

Comitter:
dixter1
Date:
Sat Dec 14 00:24:59 2013 +0000
Parent:
1:15b5edb4a91f
Commit message:
First revision working, messages going between two LISA C027 boards across the CAN interface.

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Fri Dec 13 23:37:54 2013 +0000
+++ b/main.cpp	Sat Dec 14 00:24:59 2013 +0000
@@ -1,93 +1,46 @@
 #include "mbed.h"
 #include "C027.h"
-#include "WANDongle.h"
-#include "USBSerialStream.h"
-#include "UbloxCDMAModemInitializer.h"
-#include "UbloxGSMModemInitializer.h"
-
-DigitalOut mdm_activity(LED);
 
-int main() 
-{
-    int led_toggle_count = 5;
+Ticker ticker;
+DigitalOut led1(LED);
+DigitalOut led2(LED1);
+CAN can1(CANRD, CANTD);
+Serial pc(USBTX, USBRX);
 
-    // the instantiation of the type, calls C027::C027
-    C027 c027;
-    
-    c027.mdmPower(true,false);
-    
-    // enable the GPS, and connect it 
-    // to the m3.
-    c027.gpsPower(true, false);
+char counter = 0;
 
-#if 0
-    while(1) {
-        mdm_activity = !mdm_activity;
-        wait(0.2);
-    }
-#else
-    while( led_toggle_count-- > 0 )
-    {
-        mdm_activity = !mdm_activity;
-        wait(0.2);
+void send() {
+    if(can1.write(CANMessage(1337, &counter, 1))) {
+        pc.printf("Message sent: %d\r\n", counter);
+        counter++;
     }
-#endif
-        
-    // open the mdm serial port
-    WANDongle mdmDongle;
-    USBSerialStream mdmStream(mdmDongle.getSerial(1/* the CDC usually 0 or 1, LISA-C requires CDC1*/));
-    USBHost* host = USBHost::getHostInst();
-    mdmDongle.addInitializer(new UbloxCDMAModemInitializer(host));
-    mdmDongle.addInitializer(new UbloxGSMModemInitializer(host));
-   
-    // open the PC serial port and (use the same baudrate)
-    Serial pc(USBTX, USBRX);
+    led1 = !led1;
+}
+
+int main() {
+
+    DigitalOut can_standby(CANS);
+    
+    // enable the CAN interface
+    //   take it out of standby
+    can_standby = 0;
+    
     pc.baud(MDMBAUD);
     
-    pc.printf( "M3->USB CDC connection ready\n");
-    
-    while (1)
-    {
-        uint8_t buf[64];
-        size_t len;
-        int i;
-        
-        if (!mdmDongle.connected())
-        {
-            mdmDongle.tryConnect();
+    pc.printf( "Starting CAN Testing\r\n");
+
+    CANMessage msg;
+    while(1) {
+
+        if(can1.read(msg)) {
+            pc.printf("Message received: %d\r\n", msg.data[0]);
+            led2 = !led2;
         }
-        else
-        {
         
-            // transfer data from pc to modem
-            len = mdmStream.space();
-            if (len>0)
-            {
-                if (len > sizeof(buf))
-                    len = sizeof(buf);
-                for (i = 0; (i < len) && pc.readable(); )
-                    buf[i++] = pc.getc();
-                if (OK == mdmStream.write(buf, i))
-                    /* do something? */;
-            }
-            // transfer data from modem to pc
-            len = mdmStream.available();
-            if ((len>0) && pc.writeable())
-            {
-                if (len > sizeof(buf))
-                    len = sizeof(buf);
-                if (OK == mdmStream.read(buf, &len, len))
-                {
-                    for (i = 0; (i < len); ) 
-                    {
-                        mdm_activity=!mdm_activity;
-                        pc.putc(buf[i++]);
-                    }
-                    
-                    // default the led to off 
-                    mdm_activity=0;
-                }
-            }
-        }
+        wait(0.2);
+        
+        send();
     }
 }
+
+