AVR Downloader/UploaDEr - Bugs: bug #47890, ft232r serial dongle connected to...
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bug #47890: ft232r serial dongle connected to ponyser interface
Submitter: | Christian Mueller <cm1> | ||
Submitted: | Tue 10 May 2016 06:07:34 PM UTC | ||
Category: | None | Severity: | 3 - Normal |
Priority: | 5 - Normal | Item Group: | None |
Status: | None | Privacy: | Public |
Assigned to: | None | Originator Name: | Christian Mueller |
Open/Closed: | Open | Release: | None |
Programmer hardware: | Device type: |
Fri 27 May 2016 01:24:17 PM UTC, comment #2: |
Christian Mueller <cm1> |
Thu 26 May 2016 06:52:33 AM UTC, comment #1: Just got myself a small logic analyzer so I could watch the signals in relation to each other and it turned out I had the reset pin wrong. The following definition now works fine with rates up to 4000 bits/s (-b 4000):
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Christian Mueller <cm1> |
Tue 10 May 2016 06:07:34 PM UTC, original submission:
I tried to get a regular USB/RS232 adapter with an FT232R chip working on a board/programmer using the "ponyser" interface using type "ftdi_syncbb". However, the [oscillo]scope showed that both clk and mosi, which are inverted in my configuration, jumped back to high levels directly after each command.
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Christian Mueller <cm1> |
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Corresponding source code
Small update: I had to reduce the bit rate to "-b 2000" to get it 100% stable but it's still fast enough to be usable.