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