David Grayson / PololuLedStrip

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Dependents:   WoYaoChengGOng V2-WoYaoChengGOng STM32_MagneticLight tape_Led_Sample ... more

Files at this revision

API Documentation at this revision

Revision 24:5c01a6fa1556, committed 2016-09-09

Comitter:
DavidEGrayson
Date:
Fri Sep 09 22:12:31 2016 +0000
Parent:
23:881d93b8749a
Child:
25:d72818ba17cc
Commit message:
Added a comment about the STM32F303K8.;

Changed in this revision

led_strip_write_color.s Show annotated file Show diff for this revision Revisions of this file 
--- a/led_strip_write_color.s	Thu Sep 08 23:53:42 2016 +0000
+++ b/led_strip_write_color.s	Fri Sep 09 22:12:31 2016 +0000
@@ -49,7 +49,7 @@
     str r3, [r1]       ; Drive the line high.
     
     ; It doesn't really matter exactly how long we delay here as long as it is
-    ; less than 540 microseconds.
+    ; less than the LED's threshold between 0 and 1.
     nop
     nop
     nop
@@ -61,16 +61,16 @@
     tst r6, r4
     bne delay0
     str r3, [r2]       ; If the bit to send it 0, drive the line low.
+
 delay0
-
     delay #0
 
     ldr r4, =0x80000000
     tst r6, r4
     beq delay1
     str r3, [r2]       ; If the bit to send is 1, drive the line low.
+
 delay1
-    
     delay #1
     
     lsls r6, r6, #1           ; Shift color bits.