ICND1065L SPWM Config troubles

1

Hi & thanks for this channel!

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Ich have troubles with a 11px gap of the lower half with a 128x64px panel driven by a ICND1065L.
The controller is a RPI CM4 board & Adafruit Active3 Bonnet hat.
The previous setup - 128x64px panel HUB75 no PWM - was straight forward with GitHub - hzeller/rpi-rgb-led-matrix: Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO · GitHub . I just built a control framework with an API that controls the content. Now I was trying a Chinese panel with an ICND1065L driver and RT4957DSP row expander but I cannot get rid of a 11px “dead” gap of the lower half of the panel.
I’ve tried several values and combinations - swapped through scan rows, address type, multiplexing etc. but no luck.

Currently running on GitHub - kingdo9/rpi-rgb-led-matrix_pwm_experiment: rpi-rgb-led-matrix - SPWM Expeimental Support · GitHub
Does anyone have a hint what could actually be the issue here?

Thanks & cheers

2

Please show a clear image of the back of the panel

3

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4

to confirm did you try
–led-spwm-scan=32

also what do you uee for this?
–led-spwm-row-addr-type=1
or
–led-spwm-row-addr-type=0

5

the only kind of working settings but with

scan=43

row type=2

multiplexing=0

I did a sweep through 1-86 on row type 0 & 1 - no luck to get even near a proper image - 32 makes sense, 43 is working - so this 11 rows missing in the lower half

6

sorry, but this is a non-sense

Your panel is definitely 1/32s scan and uses a shift register line switcher.

So you have to use options below:

–led-spwm-scan=32 --led-spwm-row-addr-type=1
7

Exactly -but when I set

pwm_scan=32, spwm_row_addr_type=1,

the panel goes bad instead of showing the RPis IP address - the only scan settings showing the IP with the dead bar is scan=43 and 86 with row address type=2.

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This is how the panel looks like with scan=32, row address type=1

Thanks for your help!

8

If you’re working with RP2040 or STM32 boards in the Arduino environment, you might want to try a different library that’s supports ICND1065 panels..
This way, you can check the correct settings.

9

yup

I only tested and implemented with my specific 1/43 panel. Hopefully will adapt shortly.

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