Jovan Ivković / Mbed 2 deprecated Nucleo_bitbanging_portsD5-D7led

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Dependencies:   mbed

Files at this revision

API Documentation at this revision

Revision 11:de680c2510a6, committed 2017-01-04

Comitter:
JovanEps
Date:
Wed Jan 04 16:33:24 2017 +0000
Parent:
10:51adb7641cd7
Commit message:
Final version 1.0.1

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Wed Jan 04 16:26:30 2017 +0000
+++ b/main.cpp	Wed Jan 04 16:33:24 2017 +0000
@@ -20,17 +20,18 @@
     while(1) {
         // Pattern and port setting speed benchmark
         timer.start();
-        // Messure loop time for 1k runs
+        // Measure loop and value setting time for 1k runs
         loop_vreme = timer.read_us();
         for ( i = 0; i <= 999; i++ ) {
-            noop = i;
+            noop = i; 
         }
         // -----
         loop_vreme = timer.read_us() - loop_vreme;
         timer.reset();
+        // Measure 10 bit sequence pattern
         vreme = timer.read_us();
         for ( i = 0; i <= 999; i++ ) {
-            PD5 = 1; // D5 go low 1 go LOW in next 74..75ns as Tf propagates signal on osciloscope
+            PD5 = 1; // D5 go low 1 go LOW in next 69..75ns as Tf propagates signal on osciloscope
             PD5 = 1; // D5 go low 2
             PD5 = 1; // D5 go low 3
             PD5 = 0; // D5 go inv-high on SN74vhc14 - >1.6..2.4V < 1.75ns
@@ -44,7 +45,7 @@
         vreme = timer.read_us() - vreme;
         wait_us(0.2);
         pc.printf("Port set time (single)... %6.2f ns \t tested on for: %d runs \n", ( float ) ( vreme - loop_vreme ) / 10, i * 10 ); //1000x10=10k sets of PD5 div 10 for ns
-        pc.printf("\n %d \n\n", noop);
+        pc.printf("\n %d \n\n", noop+1);
         timer.stop();
 
         /*  // Alternative
@@ -78,13 +79,13 @@
 
     /*
     while(1) {
-      //  PD7 = 1; // D7 go high in Tr ~75ns
+      //  PD7 = 1; // D7 go high in Tr ~69..75ns
         //PD13 = 1; // D13 go high has delay of
       //  myled = 1;
 
         PD5 = 0; // D5 go high
         //wait(0); // 1ns - exclude, we need as fast as we can get
-      //  PD7 = 0; // D7 go low in next 74ns
+      //  PD7 = 0; // D7 go low in next 69..74ns
         //PD13 = 0; // D13 go high
       //  PD7 = 1;
         //PD13 = 1; // D13 go high