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Known restrictions in current version
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| bet | 10/11 | | Sana | 30.03.2021 | | Hajmi | 0,74 Mb. | | #13742 |
DIO falling edge interrupts seem to trigger on both edges
DIO driver currently doesn't support configuration of open-collector for DIO pins
Display flickering: Due to SoC-internal limitations high-bus-load situations during video playback may result in IPU buffer underruns showing as brief display flickering and error messages on the serial console. These can only be resolved by reducing the used memory bandwidth.
As the i.MX35 SoCs don't provide hardware accelerators for video decoding and playback, the system performance limits the resolution of video streams that can still be played-back at 30fps:
WMV and MPEG4 AVC video codecs only support video streams with up to CIF resolution (but can still be played-back in full screen even on WVGA displays)
MPEG1, MPEG2, MPEG4 ASP, and H.263 video codecs support video streams up to D1 resolution.
Freescale Multimedia Codecs still have several known issues. All have been reported to Freescale but bug-fixes are still pending:
MPEG1, MPEG2, and WMV videos currently seem to play only for about 15-90s depending on the video and then just stop.
MPEG4 AVC and H.264 videos seem only to play back after playing back an AVI-MP42 video first.
No H.264 codec support.
RS-485: On CUPID v1.0 boards pins 13 and 14 of the RS-485 receiver (IC13) must be shortened for RS-485 to work properly.
Sometimes USB devices will not be mounted depending on the manufacturer of the USB device.
The I2C communication of the edt touch driver sometimes causes errors but the touch functionality seems not to be affected.
No support for audio recording on either used AC97 codec, UCB1400 and WM9705 (#399).
Reset may fail on rare occurrences due to OS kernel image not loading properly (#405).
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