herosdevices.hardware.ftdi

Implements a wrapper for FT232H devices.

https://www.adafruit.com/product/2264

The implementation https://github.com/eblot/pyftdi supports simultaneous use of SPI and GPIO pins. Unfortunately it is based on using bitmasks for everything.

Module Contents

class herosdevices.hardware.ftdi.GPIO

Bases: enum.Enum

Provide Rpi.GPIO like API.

IN = 0

OUT = 1

LOW

HIGH

class herosdevices.hardware.ftdi.FT232H(device_sn: str = 'QAO201901')

Provide pin wrapping and GPIO abstraction.

see http://eblot.github.io/pyftdi/pinout.html

The device sn is written to the eeprom of the Adafruit FT232H chips. To do that follow this description: https://cdn-learn.adafruit.com/downloads/pdf/adafruit-ft232h-breakout.pdf?timestamp=1550211653 (section Erase EEPROM For Programming With FT_PROG)

PINMAP

device_sn = 'QAO201901'

spi_master

gpio = None

teardown() → None

Close down spi controller.

get_slave(cs: int = 0, freq: float = 12000000.0, mode: int = 0) → int

Get a slave aka. what you use to communicate.

Parameters:

• cs – chip-select 0 <= cs <= 4 (default CS0/ADBUS3/D3)

• freq – spi frequency (default 12MHz)

• mode – spi mode (default 0)

Returns:

exposed spi slave

gpio_setup(pin: str = 'C0', mode: GPIO = GPIO.OUT, initial_value: GPIO = GPIO.LOW) → None

Set up a single GPIO pin.

Parameters:

• pin – name according to pinmap

• mode – GPIO.IN or GPIO.OUT

• initial_value – GPIO.LOW or GPIO.HIGH

Returns:

gpio_set_output(pin: str = 'C0', initial_value: GPIO = GPIO.LOW) → None

Set one pin as output.

Parameters:

• pin – str pin descriptor

• initial_value – initial value default GPIO.LOW

Returns:

gpio_set_input(pin: str = 'C0', initial_value: GPIO = GPIO.LOW) → None

Set one pin as output.

Parameters:

• pin – str pin descriptor

• initial_value – initial value default GPIO.LOW (not used)

Returns:

gpio_write(pin: str = 'C0', value: GPIO = GPIO.LOW, write: bool = True) → None

Write pin level.

Parameters:

• pin

• value

Returns:

gpio_writeall() → None

Write the configured pins to device.

gpio_read(pin: str = 'C0') → int

Read gpio pin and report state.

setHigh(pin: str = 'C0') → None

Deprecated alias for set_high.

set_high(pin: str = 'C0') → None

Set a single pin to high.

setLow(pin: str = 'C0') → None

Deprecated alias for set_low.

set_low(pin: str = 'C0') → None

Set a single pin to low.

herosdevices.hardware.ftdi.ftdi