Tedd OKANO
Revision 0:c8f89ec4e176, committed 2012-07-10
- Comitter:
- okano
- Date:
- Tue Jul 10 03:43:53 2012 +0000
- Child:
- 1:066a5725ea59
- Commit message:
- with mbed-lib rev28
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 |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jul 10 03:43:53 2012 +0000
@@ -0,0 +1,37 @@
+// port speed test program
+// this code is based on ..
+// http://mbed.org/users/simon/notebook/busout-portout-digitalout-speedup/
+
+#include "mbed.h"
+
+BusOut bus(P1_24, P1_25, P1_26, P1_27, P1_28, P1_29, P1_30, P1_31);
+PortOut port(Port0, 0x00000FF0);
+DigitalOut out(LED1);
+
+Timer t;
+
+int main() {
+// printf(" ** port speed test **\r\n");
+
+ t.start();
+ for(int i=0; i<1000000; i++) {
+ bus = 0;
+ bus = 0xFF;
+ }
+ printf(" BusOut = %8d kHz\r\n",(int)( 1000.0 / t));
+
+ t.reset();
+ for(int i=0; i<1000000; i++) {
+ port = 0;
+ port = 0xFF000000;
+ }
+ printf(" PortOut = %8d kHz\r\n", (int)(1000.0 / t));
+
+ t.reset();
+ for(int i=0; i<1000000; i++) {
+ out = 0;
+ out = 1;
+ }
+ printf(" DigitalOut = %8d kHz\r\n", (int)(1000.0 / t));
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Jul 10 03:43:53 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912