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annotate doc/DUART28-EEPROM-manual @ 82:2c135bde4dd0

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doc/CP2102-EEPROM-format: new article
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Sep 2023 01:44:27 +0000
parents dbaf239436cf
children
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dbaf239436cf doc/DUART28-EEPROM-config: update for fc-duart28-conf
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1 The new user-friendly (or fool-proof) way to examine and change DUART28 adapter
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2 configuration is fc-duart28-conf utility described in the DUART28-EEPROM-config
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3 article. The present article describes the older method that existed before
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4 fc-duart28-conf, and which is used for initial factory programming.
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6 Determining your current DUART28 config
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7 =======================================
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9 Connect the USB cable between your DUART28 board and your Linux host, and
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10 observe dmesg output. If your DUART28 board is in the C configuration, it will
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11 present as USB ID 0403:7152, and if it is in the S config, it will present as
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12 USB ID 0403:6010. You can also see these USB IDs with lsusb. The product ID
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13 string is also programmed as "DUART28C" or "DUART28S".
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15 Converting from DUART28S to DUART28C
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16 ====================================
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18 If your DUART28 board is currently in the S config (or if you messed it up and
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19 have a blank or corrupt EEPROM), its USB ID will be 0403:6010, which is the
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20 default ID for FTDI's two-channel FT2232x family. Because it is the standard
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21 default, there are plenty of other gadgets using the same ID - thus you need to
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22 ensure that you have no other USB devices with the same ID connected to your
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23 system during the reprogramming operation. Run lsusb and ensure that you see
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24 only one USB device with ID 0403:6010. Ensure that this one device really is
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25 your DUART28 board: unplug that USB cable and make sure that the device
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26 disappears, plug it back in and make sure that it reappears.
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28 One you have confirmed that you won't inadvertently hit some other FT2232x
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29 device, execute the actual programming command, which is a shell pipeline:
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31 ftee-gen2232c duart28c $Serial | fteeprom-prog i:0x0403:0x6010
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33 (See FTDI-EEPROM-tools article for other ways to specify the target device to
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34 fteeprom-prog.)
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36 Replace the $Serial metavariable with the 3-digit serial number of your DUART28
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37 adapter board as it appears on the factory serial number sticker.
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39 After this operation completes successfully, unplug and replug the USB cable
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40 between the DUART28 board and your host - the adapter should now show up with
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41 USB ID 0403:7152.
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43 Converting from DUART28C to DUART28S
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44 ====================================
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46 If your DUART28 board is currently in the C config, its USB ID will be
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47 0403:7152, which is a private ID that belongs to us and should not be used by
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48 other parties. The reverse conversion command is as follows:
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50 ftee-gen2232c duart28s $Serial | fteeprom-prog i:0x0403:0x7152