From 45068a281695a47ee0c06963005cac7783c07a91 Mon Sep 17 00:00:00 2001
From: Yorick van Pelt <yorick@yorickvanpelt.nl>
Date: Wed, 9 Jan 2019 01:46:48 +0100
Subject: [PATCH] breathing led

---
 src/blink_led.c | 35 ++++++++++++++++++++---------------
 1 file changed, 20 insertions(+), 15 deletions(-)

diff --git a/src/blink_led.c b/src/blink_led.c
index 01f2f36..fa3df74 100644
--- a/src/blink_led.c
+++ b/src/blink_led.c
@@ -22,11 +22,12 @@ __code uint16_t __at (_CONFIG1) __configword = _FOSC_INTOSC & _CLKOUTEN_OFF & _W
 void delay(uint16_t iterations)
 {
 	uint16_t i, j;
+  
 	for (i = 0; i < iterations; i++) {
 		// Prevent this loop from being optimized away.
-    for (j = 0; j < 1000; j++) { 
+    //for (j = 0; j < 12; j++) { 
 		__asm nop __endasm;
-    }
+    //}
 	}
 }
 #define PPSO_PWM1 3
@@ -35,12 +36,12 @@ void main(void)
   OSCCON = 0xf0;
   TRISC = 0;
   //SLRCONC = 0;
+  OPTION_REGbits.PSA = 1;
   LED_PORT = 0;
     PWM1CLKCON = 0x00;  // From Fosc w/o prescaler
     PWM1PRH = PWM1PRL = 0xFF;
     PWM1PH     = 0;
-    PWM1DCH    = 0x80;
-    PWM1DCL    = 0;
+    PWM1DCH = PWM1DCL = 0;
     PWM1OF     = 0;
     
 
@@ -55,15 +56,19 @@ void main(void)
     
 
 
-	while (1) {
-		//LED_PORT = 1; // LED On
-    PWM1DCH    = 0x80;
-    PWMLD = 1;
-	 	delay(300);
-		//LED_PORT = 0; // LED Off
-    //PWM1DCH     = 0xff;
-    PWM1DCH = 0x10;
-    PWMLD = 1;
-		delay(300);
-	}
+    while(1) {
+      delay(1);
+      while (PWM1DCL < 0xFF || PWM1DCH < 0xFE) {
+        if (PWM1DCL == 0xFF) PWM1DCH++;
+        PWM1DCL++;
+        PWMLD = 1;
+        delay(1);
+      }
+      while (PWM1DCL > 0 || PWM1DCH > 0) {
+        if (PWM1DCL == 0) PWM1DCH--;
+        PWM1DCL--;
+        PWMLD = 1;
+        delay(1);
+      }
+    }
 }