Revision 27:9a62663f3de2, committed 2018-05-19

Comitter:

thegink

Date:

Sat May 19 14:16:38 2018 +0000

Parent:

26:c3193bc73cff

Commit message:

Added #define for RGB/GRB order for WS2811 and WS2812b based strips, respectively. Ideally this should be selectable per instance, but it's late, and I'm tired.

Changed in this revision

--- a/PololuLedStrip.cpp	Wed Nov 01 23:11:49 2017 +0000
+++ b/PololuLedStrip.cpp	Sat May 19 14:16:38 2018 +0000
@@ -52,12 +52,21 @@
 
 void PololuLedStrip::write(rgb_color * colors, unsigned int count)
 {
+    uint8_t t;
     calculateDelays();
-
+    
     __disable_irq();   // Disable interrupts temporarily because we don't want our pulse timing to be messed up.
 
     while(count--)
     {
+
+#ifdef _POLOLU_ORDER_GRB
+        //swap red and green for WS2812b strips
+        t = colors->red;
+        colors->red = colors->green;
+        colors->green = t;
+#endif
+
         led_strip_write_color(colors, gpio.reg_set, gpio.reg_clr, gpio.mask);
         colors++;
          

--- a/PololuLedStrip.h	Wed Nov 01 23:11:49 2017 +0000
+++ b/PololuLedStrip.h	Sat May 19 14:16:38 2018 +0000
@@ -3,11 +3,20 @@
 #ifndef _POLOLU_LED_STRIP_H
 #define _POLOLU_LED_STRIP_H
 
+//If multiple colour orders are enabled, GRB will override RGB.
+
+//Use RGB colour order for WS2811 leds
+#define _POLOLU_ORDER_RGB
+
+//Use GRB colour order for WS2812b leds
+//#define _POLOLU_ORDER_GRB
+
+
 namespace Pololu
 {
     #ifndef _POLOLU_RGB_COLOR
     #define _POLOLU_RGB_COLOR
-    
+
     /** Represents an RGB color. */
     typedef struct rgb_color
     {
@@ -15,8 +24,7 @@
         uint8_t green; /*!< A number between 0 and 255 that represents the brightness of the green component. */
         uint8_t blue;  /*!< A number between 0 and 255 that represents the brightness of the blue component. */
     } rgb_color;
-    #endif
-
+#endif
     extern "C" int led_strip_write_color(rgb_color *, volatile uint32_t * set, volatile uint32_t * clear, uint32_t mask);
 
     /** This class lets you control the addressable RGB LED strips from Pololu</a>,

--- a/led_strip_write_color.s	Wed Nov 01 23:11:49 2017 +0000
+++ b/led_strip_write_color.s	Sat May 19 14:16:38 2018 +0000
@@ -28,14 +28,14 @@
     ; Push those registers so we can restore them later.
     push {r4, r5, r6, r7, lr}
 
-    ldrb r6, [r0, #1]  ; Load green.
-    lsls r6, r6, #24   ; Put green in MSB of r6.
-    ldrb r4, [r0, #0]  ; Load red.
+    ldrb r6, [r0, #0]  ; Load first colour.
+    lsls r6, r6, #24   ; Put first colour in MSB of r6.
+    ldrb r4, [r0, #1]  ; Load second colour.
     lsls r4, r4, #16
-    orrs r6, r6, r4    ; Put red in r6.
-    ldrb r4, [r0, #2]  ; Load blue.
+    orrs r6, r6, r4    ; Put second colour in r6.
+    ldrb r4, [r0, #2]  ; Load third colour.
     lsls r4, r4, #8
-    orrs r6, r6, r4    ; Put blue in r6.
+    orrs r6, r6, r4    ; Put third colour in r6.
    
     ; On the Cortex-M3 we simply did:
     ;    ldr r6, [r0]       ; Read the color.  Now we have:     xxBbGgRr