NickPGSmith: /* Linux Interface */

2024-05-16T21:43:45Z

Linux Interface

← Older revision		Revision as of 21:43, 16 May 2024
Line 63:		Line 63:
	== Linux Interface ==		== Linux Interface ==

	Packages: i2ctools, ~~python~~-i2c		Packages: i2ctools, python3-i2c-tools

	Detect buses:		Detect buses:

NickPGSmith: /* Linux Interface */

2024-05-09T05:09:59Z

Linux Interface

← Older revision		Revision as of 05:09, 9 May 2024
Line 62:		Line 62:

	== Linux Interface ==		== Linux Interface ==

	Packages: i2ctools, python-i2c		Packages: i2ctools, python-i2c

NickPGSmith: 2 revisions imported

2024-05-08T04:53:36Z

2 revisions imported

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NickPGSmith: 1 revision imported

2023-02-17T21:02:08Z

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NickPGSmith: /* USB to I2C Slave */

2021-12-20T21:29:49Z

USB to I2C Slave

New page

== Hardware ==

=== USB to I2C Slave ===

* "CJMCU-200" with FT200XD chipset
* Not very useful

=== USB to I2C Master ===

* "CJMCU-232H" with FTDI chipset FT232HQ (also including UART, SPI and GPIO)
* [http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232H.pdf Datasheet]
* [http://www.ftdichip.com/Support/Documents/AppNotes/AN_255_USB%20to%20I2C%20Example%20using%20the%20FT232H%20and%20FT201X%20devices.pdf Application Note]
* Appear as /dev/ttyUSB0

Software:
* Linux: [https://eblot.github.io/pyftdi/ python3-pyftdi]

/etc/udev/rules.d/11-ftdi.rules:
# FT232AM/FT232BM/FT232R
SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6001", MODE="0664"
# FT2232C/FT2232D/FT2232H
SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6010", MODE="0664"
# FT4232/FT4232H
SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6011", MODE="0664"
# FT232H
SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6014", MODE="0664"
# FT230X/FT231X/FT234X
SUBSYSTEM=="usb", ATTR{idVendor}=="0403", ATTR{idProduct}=="6015", MODE="0664"

python3:
>>> from pyftdi.ftdi import Ftdi
>>> Ftdi.show_devices()
Available interfaces:
ftdi://ftdi:232h:2:b/1 (Single RS232-HS

Show device URLs:
ftdi_urls.py

Show I2C devices on bus:
i2cscan.py ftdi://ftdi:232h:2:b/1

=== BME820 I2C Temp/Humidity Sensor ===

* [[Media:BME280_Schematic.jpg|Schematic]]
* Default address: (Jumper can be moved to switch 0x77 / 0x76)

=== TinyRTC ===

* Default address:

== Linux Interface ==

Packages: [https://www.mankier.com/package/i2c-tools i2ctools], python-i2c

Detect buses:
i2cdetect -l

=== BME820 I2C Temp/Humidity Sensor ===

* [[Media:BME280_Schematic.jpg|Schematic]]
* Jumper can be moved to switch address from 0x77 to 0x76

== Linux Interface ==

Packages: i2ctools, python-i2c

Detect buses:
i2cdetect -l

Board "CJMCU-232H" using the FTDI [http://www.ftdichip.com/Products/ICs/FT232H.htm FT232H] device. Similar to [https://learn.adafruit.com/adafruit-ft232h-breakout/wiring this].
* [http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232H.pdf Datasheet]
* [http://www.ftdichip.com/Support/Documents/AppNotes/AN_255_USB%20to%20I2C%20Example%20using%20the%20FT232H%20and%20FT201X%20devices.pdf Application Note]
* Appear as /dev/ttyUSB0

USB interface to:
* UART mode (default operation, at 9600 8N1)
* MPSSE mode
** SPI
** I2C Master

* FTDI Drivers and libraries
** [http://www.ftdichip.com/Drivers/D2XX.htm D2XX drivers]
** [http://www.ftdichip.com/Support/SoftwareExamples/MPSSE/LibMPSSE-I2C.htm I2C library] built on D2XX
** [http://www.ftdichip.com/Support/SoftwareExamples/MPSSE/LibMPSSE-SPI.htm SPI library] built on D2XX

* Open Source Drivers and libraries
** [http://www.intra2net.com/en/developer/libftdi/ libFTDI]
** [https://code.google.com/p/libmpsse/ libmpsse library] for SPI and I2C built on libFTDI
** [https://github.com/adafruit/Adafruit_Python_GPIO ADAFruit Python interface] for SPI, I2C and GPIO built on libFTDI
*** [https://learn.adafruit.com/adafruit-ft232h-breakout/linux-setup AdaFruit library setup]

Pinouts:

{|

!Pin
!UART Function
!SPI
!I2C
!GPIO
|-
|C0
|
|
|
|
|-
|C1
|
|
|
|
|-
|C2
|
|
|
|
|-
|C3
|
|
|
|
|-
|C4
|
|
|
|
|-
|C5
|
|
|
|
|-
|C6
|
|
|
|
|-
|C7
|
|
|
|
|-
|C8
|
|
|
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|-
|C9
|
|
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|-
|D0
|TX
|
|
|
|-
|D1
|RX
|
|
|
|-
|D2
|/RTS
|
|
|
|-
|D3
|/CTS
|
|
|
|-
|D4
|/DTR
|
|
|
|-
|D5
|/DSR
|
|
|
|-
|D6
|/DCD
|
|
|
|-
|D7
|/RI
|
|
|

|}

Interface Modules - Revision history

NickPGSmith: /* Linux Interface */

NickPGSmith: /* Linux Interface */

NickPGSmith: 2 revisions imported

NickPGSmith: 1 revision imported

NickPGSmith: /* USB to I2C Slave */