This program demonstrates the usage of the PWM. Program sets PWM0 chanel 1 and outputs it to the pin P1.2 where we get a PWM signal with a constant working cycle.

Dependencies:   mbed

Revision:
0:c1305ab902af
diff -r 000000000000 -r c1305ab902af main.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.c	Sat May 02 17:29:12 2015 +0000
@@ -0,0 +1,53 @@
+#include "LPC4088-ioconfig.h"
+#include "LPC4088-system.h"
+#include "LPC4088-pwm.h"
+
+int main(){
+
+        //omogocimo PWM0, ki ob zagonu ni prizgan
+        PCONP = PCONP | (0x1<<5);
+
+        //resetiranje PWM0
+        //RSTCON0 = RSTCON0 | (0x1<<5);
+        
+        //nastavitev pina P1.2 kot izhoda PWM0_1 - v headerju zakomentiramo timer PWM1
+        IOCON_P1_2  = IOCON_P1_2  & !(0x67F);
+        IOCON_P1_2  = IOCON_P1_2  | 0x3;
+        
+        //nastavitev pina P1.18 kot izhoda PWM1_1 - v headerju zakomentiramo timer PWM0
+        //IOCON_P1_18  = IOCON_P1_18  & !(0x67F);
+        //IOCON_P1_18  = IOCON_P1_18  | 0b010;      
+
+        //pocistimo interrupte za PWM0
+        IR = IR | 0x73F;
+        
+        //nastavimo "individual use"
+        TCR = TCR & !(1<<4);
+        
+        //nastavimo "Timer mode"
+        CTCR = CTCR & !(0x3);
+                
+        //omogočimo PWMx_1 kanal (izhod)
+        PCR = PCR | (1<<9);
+        
+        //nastavimo match register R0 tako, da ob TC == MR0 resetira
+        //celotni PWM0. Uporabili bomo kanal PWM0_1 in tega setamo in 
+        //resetamo z MR0 in MR1 (UM, tabela 556). 1
+        MCR = MCR | (1<<1);
+        MR0 = 0x7FFFF;
+        MR1 = 0x0FFFF;
+        
+        //ko so vrednosti vpisane v MR0 in MR1, obe vrednosti omogočimo (istočasno)
+        LER = LER | 0x3;
+
+        //nastavimo "timer mode" in ne "PWM mode" (ne deluje) 
+        //POZOR! Mora biti za nastavitvijo MR0/MR1
+        TCR = TCR & !(1<<3);
+
+        //vklopimo PWM0 - mora biti za nastavitvijo MR0/MR1
+        //POZOR! Mora biti za nastavitvijo MR0/MR1
+        TCR = TCR | (1<<0); 
+
+        while(1);
+        
+}