Simon Ford
/
serial_framing
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Revision 0:839d381fd33b, committed 2010-10-14
- Comitter:
- simon
- Date:
- Thu Oct 14 09:22:08 2010 +0000
- Commit message:
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r 839d381fd33b main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Oct 14 09:22:08 2010 +0000
@@ -0,0 +1,25 @@
+// See when the rx UART looses framing based on baudrate shmoo, sford
+// connect p13 to p10
+
+#include "mbed.h"
+
+Serial device(p13, NC);
+Serial m(NC, p10);
+
+int main() {
+ m.baud(4800);
+ m.format(8, Serial::Even, 1);
+ device.format(8, Serial::Even, 1);
+
+ for(int baud_rate=4800; baud_rate>=4000; baud_rate -= 25) {
+ device.baud(baud_rate);
+ device.printf("Hello world! How are you today! Hello world! How are you today!\n");
+
+ wait(0.05);
+
+ int frame_error = (LPC_UART3->LSR >> 3) & 1;
+ m.getc();
+
+ printf("baud_rate: %d, frame_error: %d\n", baud_rate, frame_error);
+ }
+}
diff -r 000000000000 -r 839d381fd33b mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Oct 14 09:22:08 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e