Comments (5)
greenbreakfast
commented on July 1, 2024
As far as I recall, the limit is 256 bytes in hardware. Can't remember where I saw that tho.
I'll set it to 256 and we can try it out
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greenbreakfast
commented on July 1, 2024
@maxgerhardt Release v0.7 of libonioni2c that includes this change. Please try it out and let me know how it goes
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maxgerhardt
commented on July 1, 2024
This issue still prevails with the newest version. It results in the same error message when trying to write 65 bytes or more: onion-i2c:: write issue for register 0x01, errno is 122: Not supported (thrown in https://github.com/OnionIoT/i2c-exp-driver/blob/master/src/lib/onion-i2c.c#L108). I think this needs changes deeper in the kernel code? The driver just write()s to the device file and the I2C device file rejects it.
Update: I did update to the newest 0b188 version by doing a factory reset & oupgrade, result is still the same.
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maxgerhardt
commented on July 1, 2024
Per https://onion.io/2bt-i2c-firmware-update/ this should be fixed, but I don't see any new commit here or in the LEDE source repository. Where are the changes for validation?
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greenbreakfast
commented on July 1, 2024
You are correct, firmware b194 and up should have this fixed. See this commit in the Onion LEDE source repo: OnionIoT/source@0ea89f4
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Related Issues (17)
- Output Verbosity HOT 1
- oled-exp draw command fills the screen with random pixels in the undefined zones.
- Omega I2C driver misses reading without defining register address HOT 2
- Change I2C address
- Error Error relocating /usr/lib/python2.7/OmegaExpansion/onionI2C.so: i2c_writeBufferRaw: symbol not found" HOT 4
- Compilation error: recompile with -fPIC HOT 1
- I2C functions never return an error
- Problem with oled-exp cursor command HOT 2
- I2C driver causing segmentation fault in onion-i2c.c HOT 4
- setCursor() function in Python module returns "I2C transaction failed." HOT 3
- Timming issues
- Off-By-One Error in i2c_writeBuffer HOT 4
- Instructions on how to build/install for Python 3 HOT 2
- Image skewed by OLEC Expansion Control of Control Panel after b236 HOT 14
- OLED_EXP_CHAR_COLUMN not OLED_EXP_CHAR_COLUMNS HOT 1
- oled-exp segmentation fault when using the draw command
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