Scaling 40 leds over one pattern

MIDIbox NG
1

Hi all,

 

I like to use a 40 segment led bargraph and connected it like a 8x5 matrix.
To control it with one single CC, i use five events with different ranges.
 

DOUT_MATRIX    n=10    rows=8    sr_dout_sel1=26    sr_dout_r1=25
EVENT_LED_MATRIX    hw_id=149    type=CC    chn=1    cc=66    range=0:24        led_matrix_pattern=2
EVENT_LED_MATRIX    hw_id=148    type=CC    chn=1    cc=66    range=25:50        led_matrix_pattern=2
EVENT_LED_MATRIX    hw_id=147    type=CC    chn=1    cc=66    range=51:76        led_matrix_pattern=2
EVENT_LED_MATRIX    hw_id=146    type=CC    chn=1    cc=66    range=77:102    led_matrix_pattern=2
EVENT_LED_MATRIX    hw_id=145    type=CC    chn=1    cc=66    range=103:127    led_matrix_pattern=2   

LED_MATRIX_PATTERN n=2  pos=0  pattern=0000000000000000
LED_MATRIX_PATTERN n=2  pos=1   pattern=1000000000000000
LED_MATRIX_PATTERN n=2  pos=2  pattern=1100000000000000
LED_MATRIX_PATTERN n=2  pos=3   pattern=1110000000000000
LED_MATRIX_PATTERN n=2  pos=4   pattern=1111000000000000
LED_MATRIX_PATTERN n=2  pos=5   pattern=1111100000000000
LED_MATRIX_PATTERN n=2  pos=6   pattern=1111110000000000
LED_MATRIX_PATTERN n=2  pos=7   pattern=1111111000000000
LED_MATRIX_PATTERN n=2  pos=M pattern=1111111100000000
LED_MATRIX_PATTERN n=2  pos=8   pattern=1111111110000000
LED_MATRIX_PATTERN n=2  pos=9   pattern=1111111111000000
LED_MATRIX_PATTERN n=2  pos=10  pattern=1111111111100000
LED_MATRIX_PATTERN n=2  pos=11  pattern=1111111111110000
LED_MATRIX_PATTERN n=2  pos=12  pattern=1111111111111000
LED_MATRIX_PATTERN n=2  pos=13  pattern=1111111111111100
LED_MATRIX_PATTERN n=2  pos=14  pattern=1111111111111110
LED_MATRIX_PATTERN n=2  pos=15  pattern=1111111111111111

  
I know it is not possible to spread 40 leds perfectly over a range from 0 to 127.
But somehow the led distribution is very uneven.
Here is a diagramm to show what happens.

post-4098-0-53091300-1426913613.jpg
post-4098-0-53091300-1426913613.jpg1200×308 52.4 KB

Does somebody know where the problem

is or what i´m doing wrong?

 

Thanks for your help!

 

 

Best regards

Marxon

 

2

After i had recap the issue, I remembered having a similar problem in the past.

The solution is that each dout_matrix has always 16 entries.

Hence it does not make sense to use all of the 16 pattern positions in my 8x5 matrix.

So i changed led pattern. 

LED_MATRIX_PATTERN n=1  pos=0  pattern=0000000000000000
LED_MATRIX_PATTERN n=1  pos=1  pattern=1000000000000000
LED_MATRIX_PATTERN n=1  pos=2  pattern=1000000000000000
LED_MATRIX_PATTERN n=1  pos=3  pattern=1100000000000000
LED_MATRIX_PATTERN n=1  pos=4  pattern=1100000000000000
LED_MATRIX_PATTERN n=1  pos=5  pattern=1110000000000000
LED_MATRIX_PATTERN n=1  pos=6  pattern=1110000000000000
LED_MATRIX_PATTERN n=1  pos=7  pattern=1111000000000000
LED_MATRIX_PATTERN n=1  pos=M  pattern=1111000000000000
LED_MATRIX_PATTERN n=1  pos=8  pattern=1111100000000000
LED_MATRIX_PATTERN n=1  pos=9  pattern=1111100000000000
LED_MATRIX_PATTERN n=1  pos=10  pattern=1111110000000000
LED_MATRIX_PATTERN n=1  pos=11  pattern=1111110000000000
LED_MATRIX_PATTERN n=1  pos=12  pattern=1111111000000000
LED_MATRIX_PATTERN n=1  pos=13  pattern=1111111000000000
LED_MATRIX_PATTERN n=1  pos=14  pattern=1111111100000000
LED_MATRIX_PATTERN n=1  pos=15  pattern=1111111100000000

Now all leds are scaled linear over the hole controller range. 

But one problem remains: 

There are still “gaps” at the cc values 26, 52, 78 and 104.

Any ideas?