David Knight / PololuLedStrip

This library lets you control the addressable RGB LED strips from Pololu Robotics. Forked to add selectable colour order (Support RGB or GRB Leds)

Fork of PololuLedStrip by David Grayson

Diff: led_strip_write_color.s

Revision:
21:87fd6273e0ff
Parent:
20:656bbcb64e3b
Child:
22:5368af3ff07d
--- a/led_strip_write_color.s	Wed Nov 13 21:16:24 2013 +0000
+++ b/led_strip_write_color.s	Tue Nov 26 23:05:08 2013 +0000
@@ -35,9 +35,9 @@
     orrs r6, r6, r4    ; Put red in r6.
     ldrb r4, [r0, #2]  ; Load blue.
     lsls r4, r4, #8
-    orrs r6, r6, r4    ; Put blue in LSB of r6.
+    orrs r6, r6, r4    ; Put blue in r6.
    
-    ; On the Cortex M0 we simply did:
+    ; On the Cortex-M3 we simply did:
     ;    ldr r6, [r0]       ; Read the color.  Now we have:     xxBbGgRr
     ;    rbit r6, r6        ; Reverse the order of the bits:    rRgGbBxx
     ;    rev r6, r6         ; Reverse the order of the bytes:   xxbBgGrR
@@ -65,6 +65,7 @@
 
     delay #0
 
+    tst r6, r8
     ldr r4, =0x80000000
     tst r6, r4
     beq delay1