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annotate doc/Icestick-instructions @ 39:b9ecfa54fe2b

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fc-duart28-conf: replace find and check-eeprom with single show command The original design with separate find and check-eeprom commands was driven by the assumption that we had to bump off the ftdi_sio driver in order to read the EEPROM, while a USB device tree check could be done non-invasively. However, now that we know that we can read the EEPROM non-invasively too, we can simplify the tool with a single show command.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 10 Sep 2023 19:21:20 +0000
parents 6bf063ade588
children
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6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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1 If you have a Lattice iCEstick FPGA board (ICE40HX1K-STICK-EVN) and you wish to
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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2 program its FT2232H subsystem EEPROM with a sensible configuration that results
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Mychaela Falconia <falcon@freecalypso.org>
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3 in the Linux kernel ftdi_sio driver leaving Channel A untouched and creating a
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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4 single ttyUSB device for Channel B, follow these instructions:
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5
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6 1) Plug your iCEstick board into your PC/laptop or other Linux host, and run
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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7 lsusb. There should be one particular line in lsusb output that reads like
6bf063ade588 doc/Icestick-instructions: new article
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8 this:
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10 Bus 001 Device 014: ID 0403:6010 Future Technology Devices International, Ltd FT2232C/D/H Dual UART/FIFO IC
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11
6bf063ade588 doc/Icestick-instructions: new article
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12 or perhaps like this on older systems:
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14 Bus 001 Device 014: ID 0403:6010 Future Technology Devices International, Ltd FT2232C Dual USB-UART/FIFO IC
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16 Bus and device numbers will be different on your system, but the important part
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Mychaela Falconia <falcon@freecalypso.org>
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17 is ID 0403:6010 - it is the default USB ID of FT2232x chips that appears when
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Mychaela Falconia <falcon@freecalypso.org>
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18 no custom ID has been assigned via the EEPROM.
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Mychaela Falconia <falcon@freecalypso.org>
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20 2) Ensure that you don't have any other USB devices with ID 0403:6010 - given
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21 that it is the chip's default, lots of devices use it!
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23 Make sure that there is only one line in lsusb output that reads ID 0403:6010.
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Mychaela Falconia <falcon@freecalypso.org>
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24 Unplug your iCEstick and make sure that this line disappears. Plug it back in
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25 and make sure the line reappears.
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27 3) Once you are sure that you won't hit some other USB device using the same
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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28 popular ID code, execute this programming command pipeline:
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30 ftee-gen2232h -b icestick | fteeprom-prog i:0x0403:0x6010
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32 This shell pipeline is a little long and looks complicated, but it must be
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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33 issued exactly as listed above. The first part of the pipeline generates an
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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34 image for an FT2232H chip (ftee-gen2232h) with 93C56 EEPROM (-b option) based
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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35 on standard (shipped with fc-usbser-tools) configuration named "icestick"; the
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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36 second part of the pipeline sends physical EEPROM write commands (USB control
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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37 endpoint requests, FTDI-specific) to the USB device matching the given ID.
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39 4) Unplug and replug the iCEstick for the EEPROM change to take effect. Run
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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40 lsusb again and note that the USB ID is now 0403:7150 instead of 0403:6010 -
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Mychaela Falconia <falcon@freecalypso.org>
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41 still within FTDI's vendor ID, but with a specific, non-default product ID
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Mychaela Falconia <falcon@freecalypso.org>
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42 code.
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44 With the new ID the Linux kernel ftdi_sio driver should create a ttyUSB device
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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45 only for FT2232H Channel B, which is the UART channel for talking to user logic
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Mychaela Falconia <falcon@freecalypso.org>
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46 inside the FPGA. I (Mother Mychaela) also recommend that you create an
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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47 iceprog-7150 wrapper around the standard iceprog utility from IceStorm toolkit,
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48 in the form of a shell script like this:
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49
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50 #!/bin/sh
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51 exec /usr/local/bin/iceprog -d i:0x0403:0x7150 "$@"
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52
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53 It looks like Claire (the author of IceStorm) was not as bothered as I am by
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Mychaela Falconia <falcon@freecalypso.org>
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54 the bogosity of a ttyUSB device for the MPSSE channel that appears on plug-in
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Mychaela Falconia <falcon@freecalypso.org>
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55 but then disappears once you run a userspace program that exercises MPSSE via
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Mychaela Falconia <falcon@freecalypso.org>
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56 libftdi: she coded iceprog to look for 0403:6010 in the absence of a -d option
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Mychaela Falconia <falcon@freecalypso.org>
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57 giving a custom device selector string, rather than doing something similar to
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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58 what I did. With standard iceprog being as it is, we need to run it with this
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Mychaela Falconia <falcon@freecalypso.org>
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59 -d option when we have programmed the FT2232H EEPROM to use a more sensible USB
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60 ID, and in my opinion the most sane way to supply this needed option is via a
6bf063ade588 doc/Icestick-instructions: new article
Mychaela Falconia <falcon@freecalypso.org>
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61 wrapper as recommended above.