FreeCalypso > hg > freecalypso-hwlab
annotate eeproms/jtag-unbuf @ 67:286289d551ee
lunalcd: gen-ht-init added
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 19 Mar 2020 03:14:33 +0000 |
parents | ace3ed1d5ddf |
children | 1d38af6d7be8 |
rev | line source |
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32
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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1 # This EEPROM configuration is meant to be programmed into COTS FT2232D |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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2 # breakout boards used as unbuffered JTAG adapters. The custom USB VID:PID |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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3 # belongs to Falconia Partners LLC; we hereby allow the community to program |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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4 # this PID into generic FT2232D boards (not made by Falconia) as long as |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
5 # it is used for the present purpose with this full EEPROM configuration. |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
6 # |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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7 # The purpose of having a custom USB ID is to prevent the Linux kernel |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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8 # from treating this FT2232D instance as a dual UART and creating a |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
9 # ttyUSB device for Channel A; if you wish to use Channel B as a UART |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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10 # (which is still available for that purpose), you will need to make a |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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11 # one-liner patch to the ftdi_sio driver, telling it to treat this USB ID |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
12 # like other JTAG+UART adapters, creating a ttyUSB device only for Channel B. |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
13 |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
14 vid 0x0403 # FTDI |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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15 pid 0x7151 # Allocated by FTDI to Falconia Partners LLC |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
16 manuf FTDI |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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17 product Unbuffered JTAG adapter |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
18 |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
19 # We program Channel A to come up in the 245 FIFO mode prior to being |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
20 # switched into MPSSE mode by OpenOCD, as opposed to the default 232 UART mode. |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
21 # If the FT2232D chip's ADBUS pins are connected directly to the JTAG target |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
22 # without a buffer (what we mean by an unbuffered JTAG adapter), the default |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
23 # 232 UART mode is NOT safe, as it will produce a fight on the ADBUS2 line |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
24 # between the UART RTS output and the target's TDO output. 245 FIFO mode is |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
25 # expected to be safer, as all 8 ADBUS lines will be inputs for as long as |
52
ace3ed1d5ddf
Unbuffered FT2232x JTAG article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
32
diff
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26 # the ACBUS2 line is left unconnected and not driven by anything. |
32
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
27 |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
28 byte00 0x01 # Channel A: FIFO mode, D2XX driver |
60b8cf977c3f
unbuffered JTAG adapters: ID assigned and EEPROM config created
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
29 byte01 0x08 # Channel B: UART mode, VCP driver |