Compiling the firmware is not working // Error

[xXBlackskyyXx]

Hello, I'm desperately trying to compile HyperSerialPico. My hardware is as follows: RP2040 Scorpio, SK6812 RGBW on LG TV (HyperHDR newest release). When compiling, I keep getting "Error: Process completed with exit code 2". Can anyone tell me what I'm doing wrong? I followed the official guide (https://github.com/awawa-dev/HyperSerialPico/wiki). My modified CMakeLists.txt is attached.

    # Turn this setting to ON if your rp2040 is not detected after firmware upload and reset
set(BOOT_WORKAROUND ON)

# Default output data pin for the non-SPI LED strips (only for sk6812/ws2812b)
set(_PIN 16)

# Default output data/clocks pin for the SPI LED strips (only for apa102, not for sk6812/ws2812b)
# only certain pairs of pins are allowed for selected SPI interface (refer to "readme.md")
set(OUTPUT_SPI_DATA_PIN 3)
set(OUTPUT_SPI_CLOCK_PIN 2)
set(OUTPUT_SPI_INTERFACE spi0)

# Use multi-segment, starting index of second led strip or OFF to disable
set(SECOND_SEGMENT_INDEX 296)

# If multi-segment is used and it's reversed, set this option to ON to enable reversing
set(SECOND_SEGMENT_REVERSED OFF)

# User configuration section ends here
# Usually you don't need to change anything below this section
   endif()

[awawa-dev]

Hi
It definitely wasn't like that in the original file: set(_PIN 16)

[xXBlackskyyXx]

Hello, that's correct. I changed it myself because I'm using the RP2040 Scorpio. Or was that incorrect?

[awawa-dev]

_PIN is missing prefix

[xXBlackskyyXx]

Oh man, that was the mistake. I hadn't actually changed it like that—it was more of an oversight. Thanks for the quick help!

[xXBlackskyyXx]

So, the firmware seems to be working; the multi-segments are functional. However, there is one thing I just can't wrap my head around. I have 296 LEDs mounted around my TV (covering all sides). Now, I want to set up a second instance to illuminate an additional 24 LEDs on the left and another 24 on the right. These LEDs should mirror the lighting effects from the TV setup—specifically, they should reflect roughly 50% of the TV image on both the left and right sides.

So, I created a second instance in HyperHDR and configured the placement for these 48 additional LEDs. However, the LEDs aren't being driven. They only start lighting up if I increase the total LED count within the main instance (the one for the LG TV). It doesn't seem to matter where I add those extra LEDs within the main instance's configuration. Naturally, though, the colors then no longer match the TV image correctly.

It seems to me as though there might be a hard-coded "total LED count" limit somewhere in the system.

Perhaps someone else here has had a similar experience and can tell me where the bottleneck lies. This kind of stuff is driving me crazy!

[awawa-dev]

Each instance uses its own LED driver, and the serial port driver cannot be shared. HyperSerialPico is heavily optimized for typical one- or two-segment setups, so to achieve a 3-segment solution like this, you need to 'crack' the configuration. It's possible, but it comes with some limitations and the configuration is difficult.

BTW, HyperSerial USB is coming soon to Hyperk (if you want to test it I can provide you a current test firmware now). It allows you to manage 8 segments with a fairly low performance penalty - resulting from sharing resources with things like Wi-Fi - since the Pico has plenty of power to handle it.

[xXBlackskyyXx]

Thank you for the reply. I would love to test the software!

[awawa-dev]

Your rp2040 lacks wifi so the configuration for HyperSerial needs to be precompiled. Because we are in the testing phase I can do it for you this time but you need to provide following information:

• RGBW (sk6812) or RGB(ws2812b)
• total LEDs number
• gpio for the first segment (the second segment will be assigned with the next one and so on)
• starting index (0-based) of the first LED of the second strip and if it's reversed
• starting index (0-based) of the first LED of the third strip and if it's reversed

[xXBlackskyyXx]

Thank you very much for this.

I am currently using 296 SK6812 LEDs as my first instance (Ambilight for the TV). My second instance consists of two LED strips, each containing 56 WS2812b LEDs. I would like to split this second instance across Channel 2 and Channel 3.
The start index for the second strip is 296.
The start index for the third strip is 352. The LEDs are not rotated—a setting that can, of course, be configured in HyperHDR.