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diff --git a/peripheral/libmraa/docs/ftdi_ft4222.md b/peripheral/libmraa/docs/ftdi_ft4222.md deleted file mode 100644 index ca1b980..0000000 --- a/peripheral/libmraa/docs/ftdi_ft4222.md +++ /dev/null @@ -1,80 +0,0 @@ -FTDI FT4222H {#ft4222} -============ - -The FT4222H is a High/Full Speed USB2.0-to-Quad SPI/I2C device controller. Mraa -supports it as a USB subplatform using the libft4222 library from FTDI which -can be found -[here](http://www.ftdichip.com/Support/SoftwareExamples/libft4222-1.2.1.4.tgz). -You need the latest version for the GPIO to work. - -The FT4222H has 4 configuration modes selected by {DCNF1, DCNF0}. The chip -configuration mode will determine the number of USB interfaces for data streams -and for GPIOs control. Mraa supports chip modes CNFMODE0 and CNFMODE3. In -CNFMODE0 the chip can provide either 4 GPIOs and SPI, or 2 GPIOs and I2C -since SCL/SDA are shared with GPIO0/GPIO1. It is possible to change this -selection dynamically by calling the corresponding mraa init functions. -CNFMODE3 on the other hand will only provide SPI or I2C. - -By default, both modes start with I2C enabled and the driver will scan for -known GPIO expanders on the I2C bus when the FT4222H is initialized. - -Supported GPIO expanders: -* PCA9672 -* PCA9555 -* PCF8575 - -Output from 'mraa-gpio list' would be as follows: -~~~~~~~~~~~~~ -512 IGPIO0/SCL0: GPIO I2C -513 IGPIO1/SDA0: GPIO I2C -514 INT-GPIO2: GPIO -515 INT-GPIO3: GPIO -~~~~~~~~~~~~~ - -When an I2C GPIO expander is present, the pins on the expander will appear after -the 4 FT4222H GPIO pins (i.e. starting at physical pin #4, logical pin #516). -~~~~~~~~~~~~~ -512 IGPIO0/SCL0: GPIO I2C -513 IGPIO1/SDA0: GPIO I2C -514 INT-GPIO2: GPIO -515 INT-GPIO3: GPIO -516 EXP-GPIO0: GPIO -517 EXP-GPIO1: GPIO -518 EXP-GPIO2: GPIO -519 EXP-GPIO3: GPIO -520 EXP-GPIO4: GPIO -521 EXP-GPIO5: GPIO -522 EXP-GPIO6: GPIO -523 EXP-GPIO7: GPIO -~~~~~~~~~~~~~ - -If a PCA9545 I2C switch is detected an extra four I2C busses will appear, -representing the four downstream busses. Output from 'mraa-i2c list' -would be as follows: -~~~~~~~~~~~~~ -Bus 512: id=00 type=ft4222 default -Bus 513: id=01 type=ft4222 -Bus 514: id=02 type=ft4222 -Bus 515: id=03 type=ft4222 -Bus 516: id=04 type=ft4222 -~~~~~~~~~~~~~ - -Please note that some mraa features might not be fully implemented yet and they -are still under development (e.g. SPI replacement functions). - -We tested the module using FTDI's UMFT4222EV reference board. More details on -this board can be found -[here](http://www.ftdichip.com/Support/Documents/DataSheets/Modules/DS_UMFT4222EV.pdf). - -Interface notes ---------------- - -You will need to unload all ftdi kernel modules for libft4222 to work -correctly. You will also have to compile mraa with FT4222 support which may not -be enabled by default. - -The cmake options to build this driver are: -~~~~~~~~~~~~~ -FTDI4222=ON -USBPLAT=ON -~~~~~~~~~~~~~ |