Stephen Dickey
With this test, you can tie external TXD and RXD together, and on the USB console, see the characters entered be echo'd back. This is effectively a loopback test verifying the external hardware interface, through the USB console interface.
Revision 0:7ac9848b2e4b, committed 2013-12-13
- Comitter:
- dixter1
- Date:
- Fri Dec 13 23:45:09 2013 +0000
- Child:
- 1:ce52702074c2
- Commit message:
- First revision this code. If external pins D0/D1 are connected, this performs an external loopback test.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C027-REVB.lib Fri Dec 13 23:45:09 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/dixter1/code/C027-REVB/#db7c445289f5
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Dec 13 23:45:09 2013 +0000
@@ -0,0 +1,47 @@
+#include "mbed.h"
+#include "C027.h"
+
+DigitalOut mdm_activity(LED);
+
+int main()
+{
+ int led_toggle_count = 5;
+
+#if 0
+ while(1) {
+ mdm_activity = !mdm_activity;
+ wait(0.2);
+ }
+#else
+ while( led_toggle_count-- > 0 )
+ {
+ mdm_activity = !mdm_activity;
+ wait(0.2);
+ }
+#endif
+
+ // open the external serial port
+ Serial m3(D1, D0);
+ m3.baud(MDMBAUD);
+
+ // open the USB console port and (use the same baudrate)
+ Serial pc(USBTX, USBRX);
+ pc.baud(MDMBAUD);
+
+ if ( m3.writeable() ) pc.printf("m3 is writable\r\n");
+ if ( m3.readable() ) pc.printf("m3 is readable\r\n");
+
+ pc.printf( "M3->EXT UART connection ready\r\n");
+
+ m3.printf( "TESTING\r\n");
+
+ while (1)
+ {
+ // transfer data from pc to modem
+ if (pc.readable() && m3.writeable())
+ m3.putc(pc.getc());
+ // transfer data from modem to pc
+ if (m3.readable() && pc.writeable())
+ pc.putc(m3.getc());
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Dec 13 23:45:09 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f \ No newline at end of file