TVZ Mechatronics Team
Primjer postavljanja mbed Ticker-a na niži prioritet. Imati na umu da se sa "NVIC_SetPriority(TIMER3_IRQn)" postavlja prioritet za sve Timer objekte (Timer, Ticker, Timeout). Ako želite postavljati prioritete Timera neovisno treba ih pisati ručno. Link sa primjerom: https://exploreembedded.com/wiki/LPC1768:_Timers
Dependencies: mbed
Revision 0:8cbff755d303, committed 2016-12-15
- Comitter:
- bosko1523
- Date:
- Thu Dec 15 08:59:57 2016 +0000
- Commit message:
- Primjer postavljanja mbed Ticker-a na nizi prioritet
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 8cbff755d303 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Dec 15 08:59:57 2016 +0000
@@ -0,0 +1,55 @@
+// Primjer postavljanja mbed Ticker-a na nizi prioritet
+// Nested Vectored Interrupt Controller (NVIC)
+#include "mbed.h"
+// Varijabla za brojanje rastucih bridova PwmOut objekta
+volatile int counter = 0;
+// Callback funkcija koju poziva InterruptIn objekt
+void timing_critical() {
+ counter++;
+}
+
+// Callback funkcija koju poziva Ticker objekt
+void long_event() {
+ wait_ms(50);
+}
+
+PwmOut out(p25);
+InterruptIn in(p26);
+Ticker tick;
+
+int main() {
+ // Generiranje PWM signala
+ out.period_ms(10);
+ out.pulsewidth_ms(5);
+ // Poziv callback funkcije void timing_critical(); na svaki rastuci brid od InterruptIn pina
+ in.rise(&timing_critical);
+
+ // Uzimanje 5 sample-ova svakih 1 sec
+ printf("1) InterruptIn only...\n");
+ for(int i=0; i<5; i++) {
+ counter = 0;
+ wait(1);
+ printf("counts/sec = %d\n", counter);
+ }
+
+ // Poziv callback funkcije void long_event(); od strane Ticker objekta u periodu od 0.1 sec
+ tick.attach(&long_event, 0.1);
+
+ // Uzimanje 5 sample-ova svakih 1 sec sa ukljucenim Ticker objektom bez postavljanja prioritera
+ printf("2) InterruptIn plus long running occasional ticker event...\n");
+ for(int i=0; i<5; i++) {
+ counter = 0;
+ wait(1);
+ printf("count/sec = %d\n", counter);
+ }
+
+ // Uzimanje 5 sample-ova svakih 1 sec sa ukljucenim Ticker objektom sa postavljenim prioritetom
+ printf("3) InterruptIn plus long running occasional ticker event at lower priority...\n");
+ // Postavi mbed ticker na najnizi prioritet
+ NVIC_SetPriority(TIMER3_IRQn, 255);
+ for(int i=0; i<5; i++) {
+ counter = 0;
+ wait(1);
+ printf("counter = %d\n", counter);
+ }
+}
\ No newline at end of file
diff -r 000000000000 -r 8cbff755d303 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Dec 15 08:59:57 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/d75b3fe1f5cb \ No newline at end of file