Peter Scholtens
Generates a fixed pattern with constant output. Needed for debugging the SimpleDecimationFilter.
Revision 0:f9195b124694, committed 2015-05-27
- Comitter:
- pscholtens
- Date:
- Wed May 27 09:33:12 2015 +0000
- Commit message:
- First version with constant output rate.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FastIO.lib Wed May 27 09:33:12 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/Sissors/code/FastIO/#f0a48027b2b3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed May 27 09:33:12 2015 +0000
@@ -0,0 +1,82 @@
+#include "mbed.h"
+#include "FastIO.h"
+
+//DigitalOut bitstream(p8);
+FastOut<p8> bitstream;
+DigitalOut myled(LED1);
+
+Serial pc(USBTX, USBRX); // tx, rx
+Timer timer;
+
+#define LOOP 1000000
+
+int main() {
+ int data[42];
+ data[ 0] = 0;
+ data[ 1] = 1;
+ data[ 2] = 0;
+ data[ 3] = 0;
+ data[ 4] = 1;
+ data[ 5] = 1;
+ data[ 6] = 0;
+ data[ 7] = 0;
+ data[ 8] = 0;
+ data[ 9] = 1;
+ data[10] = 1;
+ data[11] = 1;
+ data[12] = 0;
+ data[13] = 0;
+ data[14] = 0;
+ data[15] = 0;
+ data[16] = 1;
+ data[17] = 1;
+ data[18] = 1;
+ data[19] = 1;
+ data[20] = 0;
+ data[21] = 0;
+ data[22] = 0;
+ data[23] = 0;
+ data[24] = 0;
+ data[25] = 1;
+ data[26] = 1;
+ data[27] = 1;
+ data[28] = 1;
+ data[29] = 1;
+ data[30] = 0;
+ data[31] = 0;
+ data[32] = 0;
+ data[33] = 0;
+ data[34] = 0;
+ data[35] = 0;
+ data[36] = 1;
+ data[37] = 1;
+ data[38] = 1;
+ data[39] = 1;
+ data[40] = 1;
+ data[41] = 1;
+ int index = 0;
+ int dummy;
+ int iter_incr = 1;
+ float duration;
+ pc.baud(115200);
+ pc.printf("Start\n");
+ timer.reset();
+ timer.start();
+loop:
+ for (int i = 0; i < LOOP; i+=iter_incr) {
+ bitstream = data[index];
+ index = (index+1)%42;
+ /* Begin of useless calculation to force 1 MHz runtime */
+ dummy = 3;
+ for (int j = 0; j <51; j++) {
+ dummy+=dummy;
+ }
+ /* End of useless calculation to force 1 MHz runtime */
+ }
+ timer.stop();
+ duration = timer.read();
+ pc.printf("Loop took %f seconds, %g per iteration\n",duration,duration/LOOP);
+ /* After testing the speed of the loop during 1 second, now continu to run it forever. */
+ iter_incr = 0;
+ goto loop;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed May 27 09:33:12 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/433970e64889 \ No newline at end of file