etc:users:jcmvbkbc:hardware
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Hardware notes
ARM-USB-TINY-H
Connector pinout
9 5 1
----^^----
/oooooooooo\
\oooooooooo/
----------
6 2
Low voltage UART mode
Pin functions
- 1, 2: Vcc (connected)
- 4, 6 and the rest of the low row: GND (connected)
- 5: RX (I)
- 7: CTS# (I)
- 9: TX (O)
- 11: RI# (I)
- 13: RTS# (O)
- 17: DTR# (O): my modification
Driver
- modprobe ftdi_sio vendor=0x15ba product=0x002a
- echo -n “15ba 002a” > /sys/bus/usb-serial/drivers/ftdi_sio/new_id
Xtensa JTAG
Pin functions
- 1: Vcc
- 3: TRST#
- 4: GND
- 5: TDI
- 7: TMS
- 9: TCK
- 13: TDO
- 15: SRST# (doesn't work)
topology.xml controller line
<controller id='Controller0' module='ft2232' probe='flyswatter' vid='0x15ba' pid='0x002a' usbser='OLVGHYS?' speed='10MHz'/>
SPI master
Pin functions
- 5: SDO
- 7: SCL
- 9: SCK
- 13: SDI (pulled up by default)
PyFTDI-based example
from pyftdi import ftdi, spi
ftdi.Ftdi.add_custom_vendor(vid = 0x15ba)
ftdi.Ftdi.add_custom_product(vid = 0x15ba, pid = 0x002a)
ftdi.Ftdi.show_devices()
ctrl = spi.SpiController()
ctrl.configure("ftdi://0x15ba:0x002a:1/1")
spi = ctrl.get_port(freq = 10000000, cs = 0)
...
etc/users/jcmvbkbc/hardware.1788010910.txt.gz · Last modified: 2026/08/29 16:41 by jcmvbkbc