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Difference between revisions of "ChristmasTree2012"

From Francois Louw

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So for 2012 I dont want just any boring tree, I want to make one myself with a bunch of LEDs and a PIC that I have lying around!
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[[Projects|Back To All Projects Page]]
  
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Here are the build steps with pictures, schematics and code!
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[[Main Page|Back To Main Page]]
  
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==Schematic==
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__TOC__
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[[File:tree-2012-schematic.jpg|300px]]
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----
 +
So for 2012 I didn't want just any boring tree, I wanted to make one myself with a bunch of LEDs and a PIC that I had lying around!
 +
 
 +
Here are the results with video, pictures, schematics and code!
 +
 
 +
{{#ev:youtube|ShFkCYE7gvw}}
 +
 
 +
=Schematic=
 +
 
 +
[[File:tree-2012-schematic.jpg|500px]]
 +
 
 +
''FIX: The MCLR resistor should pull up the MCLR pin, and the MCLR pin should be connected straight to the ICSP header''
 +
 
 +
The MCLR resistor is 4.7K and the LED resistors will depend on your LEDs. Remember that there is a limit on the amount of current that the PIC can supply. I limited my 2V LEDs to 0.8mA by using 3.8K Resistors. The total current usage is 20mA when all the LEDs are on. Assuming the 9V battery has a 400mAh life then this will give me at least 20 hours. Realistically I should get 30+ hours. For timing I used a 10MHz crystal.
 +
 
 +
=Source Code=
 +
 
 +
The code was written in C using MPLAB 8.60 and the HiTech C Compiler.
 +
 
 +
Here's the source code
 +
 
 +
<source lang="c">
 +
#include <htc.h>
 +
__CONFIG(HS & WDTDIS & PWRTDIS & BORDIS & LVPDIS & DEBUGEN);
 +
 
 +
#define LW RB0
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#define HR RB1
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#define LR RB2
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#define TR RB3
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#define MR RB4
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#define TW RB5
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#define MG RC0
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#define LG RC1
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#define HG RC2
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#define TG RC3
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#define HW RC6
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#define MW RC7
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#define HB RA0
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#define TB RA1
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#define MB RA2
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#define LB RA3
 +
 
 +
#ifndef _XTAL_FREQ
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#define _XTAL_FREQ 10000000
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#endif
 +
 
 +
void delay()
 +
{
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__delay_ms(500);
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}
 +
 
 +
void all(int i)
 +
{
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LW = i;
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MW = i;
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HW = i;
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TW = i;
 +
 
 +
LR = i;
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MR = i;
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HR = i;
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TR = i;
 +
 
 +
LG = i;
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MG = i;
 +
HG = i;
 +
TG = i;
 +
 
 +
LB = i;
 +
MB = i;
 +
HB = i;
 +
TB = i;
 +
 
 +
}
 +
 
 +
void white(int i)
 +
{
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LW = i;
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MW = i;
 +
HW = i;
 +
TW = i;
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}
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void red(int i)
 +
{
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LR = i;
 +
MR = i;
 +
HR = i;
 +
TR = i;
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}
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void green(int i)
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{
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LG = i;
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MG = i;
 +
HG = i;
 +
TG = i;
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}
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void blue(int i)
 +
{
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LB = i;
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MB = i;
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HB = i;
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TB = i;
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}
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void low(int i)
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{
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LW = i;
 +
LR = i;
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LG = i;
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LB = i;
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}
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void middle(int i)
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{
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MW = i;
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MR = i;
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MG = i;
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MB = i;
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}
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void high(int i)
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{
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HW = i;
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HR = i;
 +
HG = i;
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HB = i;
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}
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void top(int i)
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{
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TW = i;
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TR = i;
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TG = i;
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TB = i;
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}
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void north(int i)
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{
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LB = i;
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MG = i;
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HW = i;
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TR = i;
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}
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void east(int i)
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{
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LG = i;
 +
MW = i;
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HR = i;
 +
TB = i;
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}
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void south(int i)
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{
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LW = i;
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MR = i;
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HB = i;
 +
TG = i;
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}
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void west(int i)
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{
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LR = i;
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MB = i;
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HG = i;
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TW = i;
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}
 +
 
 +
void spiralbottom(int i)
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{
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LW = i;
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delay();
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MW = i;
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delay();
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HW = i;
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delay();
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TW = i;
 +
delay();
 +
 
 +
LR = i;
 +
delay();
 +
MR = i;
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delay();
 +
HR = i;
 +
delay();
 +
TR = i;
 +
delay();
 +
 
 +
LG = i;
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delay();
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MG = i;
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delay();
 +
HG = i;
 +
delay();
 +
TG = i;
 +
delay();
 +
 
 +
LB = i;
 +
delay();
 +
MB = i;
 +
delay();
 +
HB = i;
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delay();
 +
TB = i;
 +
delay();
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}
 +
 
 +
void main(void)
 +
{
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OPTION = 0;
 +
GIE = 0;
 +
 +
TMR1ON = 0;
 +
TMR2ON = 0;
 +
 
 +
SSPEN = 0;
 +
SPEN = 0;
 +
SREN = 0;
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CREN = 0;
 +
ADDEN = 0;
 +
 
 +
 
 +
//set ports and timers
 +
TRISA0 = 0;
 +
TRISA1 = 0;
 +
TRISA2 = 0;
 +
TRISA3 = 0;
 +
TRISA4 = 1;
 +
TRISA5 = 0;
 +
 
 +
TRISB0 = 0;
 +
TRISB1 = 0;
 +
TRISB2 = 0;
 +
TRISB3 = 0;
 +
TRISB4 = 0;
 +
TRISB5 = 0;
 +
 
 +
TRISC0 = 0;
 +
TRISC1 = 0;
 +
TRISC2 = 0;
 +
TRISC3 = 0;
 +
TRISC4 = 0;
 +
TRISC5 = 0;
 +
TRISC6 = 0;
 +
TRISC7 = 0;
 +
 
 +
//disable A/D
 +
ADON = 0;
 +
//all digital
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PCFG3 = 0;//no ref
 +
PCFG2 = 1;
 +
PCFG1 = 1;
 +
PCFG0 = 0;//no care
 +
 
 +
//diable capture compare
 +
CCP1CON = 0;
 +
CCP2CON = 0;
 +
 
 +
all(0);
 +
 
 +
while(1)
 +
{
 +
//flash all
 +
all(1);
 +
delay();
 +
all(0);
 +
delay();
 +
all(1);
 +
delay();
 +
all(0);
 +
delay();
 +
all(1);
 +
delay();
 +
all(0);
 +
delay();
 +
all(1);
 +
delay();
 +
all(0);
 +
delay();
 +
all(1);
 +
delay();
 +
all(0);
 +
delay();
 +
 
 +
//colours
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white(1);
 +
delay();
 +
white(0);
 +
red(1);
 +
delay();
 +
red(0);
 +
green(1);
 +
delay();
 +
green(0);
 +
blue(1);
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delay();
 +
blue(0);
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delay();
 +
 
 +
//reset
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all(0);
 +
 
 +
//bottom to top
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low(1);
 +
delay();
 +
middle(1);
 +
delay();
 +
high(1);
 +
delay();
 +
top(1);
 +
delay();
 +
 
 +
//top to bottom
 +
top(0);
 +
delay();
 +
high(0);
 +
delay();
 +
middle(0);
 +
delay();
 +
low(0);
 +
delay();
 +
 
 +
//side to side circle on
 +
north(1);
 +
delay();
 +
east(1);
 +
delay();
 +
south(1);
 +
delay();
 +
west(1);
 +
delay();
 +
//side to side circle off
 +
north(0);
 +
delay();
 +
east(0);
 +
delay();
 +
south(0);
 +
delay();
 +
west(0);
 +
delay();
 +
 +
//spiral colours up
 +
spiralbottom(1);
 +
spiralbottom(0);
 +
}
 +
 +
}
 +
</source>
 +
 
 +
=Result=
 +
 
 +
Here are pictures of the final result (ignore the quality of the makeshift wire tree)
 +
 
 +
[[File:tree-2012-1.jpg|500px]]
 +
 
 +
[[File:tree-2012-2.jpg|500px]]
 +
 
 +
=Copyright=
 +
 
 +
Everything here is under [[Gplv3|GPL 3.0]].
 +
 
 +
If you use this to make your own project email me and link to my site.
 +
my email is francois.louw@(this-domain)

Latest revision as of 12:03, 24 July 2014