Kang mingyo / FastPWM

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Dependents:   OV7670_make

Diff: Device/FastPWM_LPC11U24.cpp

Revision:
7:1b5df740bcd7
Parent:
4:a7b9f778c4b4
Child:
10:36362e9067b0
--- a/Device/FastPWM_LPC11U24.cpp	Mon Mar 17 22:12:58 2014 +0000
+++ b/Device/FastPWM_LPC11U24.cpp	Thu May 01 16:54:00 2014 +0000
@@ -36,16 +36,14 @@
         bits = 16;
     else
         //32-bit timer
-        bits = 32;
-    
-    printf("Bits = %d, PWM = %d, MR = %d\n\r", bits, tid.timer, tid.mr);
-    
+        bits = 32;  
 }
 
 void FastPWM::pulsewidth_ticks( uint32_t ticks ) {
-    pwm_obj->TCR = 0x02;
-    *PWM_MR = pwm_obj->MR3 - ticks;  //They inverted PWM on the 11u24
-    pwm_obj->TCR = 0x01; 
+    if (ticks)
+        *PWM_MR = pwm_obj->MR3 - ticks;  //They inverted PWM on the 11u24
+    else
+        *PWM_MR = 0xFFFFFFFF;           //If MR3 = ticks 1 clock cycle wide errors appear, this prevents that (unless MR3 = max).
 }
 
 void FastPWM::period_ticks( uint32_t ticks ) {