AVR Downloader/UploaDEr - Patches: patch #9122, Fixed MISO sampling in ftdi_syncbb
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patch #9122: Fixed MISO sampling in ftdi_syncbb
Submitter: | Ivan Frederiks <ifred> | ||
Submitted: | Mon 19 Sep 2016 06:30:40 PM UTC | ||
Category: | None | Priority: | 7 - High |
Status: | Done | Privacy: | Public |
Assigned to: | joerg_wunsch | Open/Closed: | Closed |
Sun 14 Nov 2021 03:45:55 PM UTC, comment #1: |
Joerg Wunsch <joerg_wunsch> |
Mon 19 Sep 2016 06:30:40 PM UTC, original submission:
ATmega samples MOSI and shifts out MISO data on rising edge of SCK. Existing ftdi_syncbb implementation samples MISO data shortly after rising edge of SCK. This is incorrect, but might work for slow FTDI chip or ATmega with high speed external oscillator.
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Ivan Frederiks <ifred> |
Depends on the following items: None found
Items that depend on this one: None found
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Follow 4 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2021-11-14 | joerg_wunsch | Status | None | Done | |
Assigned to | None | joerg_wunsch | |||
Open/Closed | Open | Closed | |||
2016-09-19 | ifred | Attached File | - | Added miso_sampling.patch, #38554 |
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Corresponding source code
Tried to follow what all that code does, but frankly, without really tracking everything on a logic analyzer, it's quite complex. Since I don't have any such programmer handy, I trust that this is the right thing to do.
So, applied in r1474.