examples Package¶

`examples` Package¶

pylibftdi examples

`bit_server` Module¶

bit_server.py - remote HTTP interface to bit-bangged FTDI port This runs as a web server, connect to port 8008

Change HTTP_PORT for different port number or supply alternate as args[1]

Requires:

pylibftdi

class pylibftdi.examples.bit_server.ReqHandler(request, client_address, server)[source]¶

Bases: BaseHTTPServer.BaseHTTPRequestHandler

do_GET()[source]¶

do_POST()[source]¶

send_head()[source]¶

class pylibftdi.examples.bit_server.ThreadingServer(server_address, RequestHandlerClass, bind_and_activate=True)[source]¶: Bases: SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer

pylibftdi.examples.bit_server.get_page()[source]¶

pylibftdi.examples.bit_server.runserver(port=8008)[source]¶

`lcd` Module¶

Write a string (argv[1] if run from command line) to a HD44780 LCD module connected via a FTDI UM232R/245R module using pylibftdi

example usage:

# while true; > do python lcd.py $( awk ‘{print $1}’ /proc/loadavg); > sleep 5; > done

class pylibftdi.examples.lcd.LCD(device)[source]¶

Bases: object

The UM232R/245R is wired to the LCD as follows:: DB0..3 to LCD D4..D7 (pin 11..pin 14) DB6 to LCD ‘RS’ (pin 4) DB7 to LCD ‘E’ (pin 6)

init_four_bit()[source]¶: set the LCD’s 4 bit mode, since we only have 8 data lines and need at least 2 to strobe data into the module and select between data and commands.

write_cmd(x)[source]¶

write_data(x)[source]¶

pylibftdi.examples.lcd.display(string, device_id=None)[source]¶: Display the given string on an attached LCD an optional device_id can be given.

`led_flash` Module¶

Flash an LED connected via a FTDI UM232R/245R module using pylibftdi

Optionally supply a flash rate (in Hz, default 1) as an argument

pylibftdi.examples.led_flash.flash_forever(rate)[source]¶: toggle bit zero at rate Hz

pylibftdi.examples.led_flash.main()[source]¶

`list_devices` Module¶

Report connected FTDI devices. This may be useful in obtaining serial numbers to use as the device_id parameter of the Device() constructor to communicate with a specific device when more than one is present.

example usage:

$ python pylibftdi/examples/list_devices.py FTDI:UB232R:FTAS1UN5 FTDI:UM232R USB <-> Serial:FTE4FFVQ

To open a device specifically to communicate with the second of these devices, the following would be used:

>>> from pylibftdi import Device
>>> dev = Device(device_id="FTE4FFVQ")
>>>

pylibftdi.examples.list_devices.get_ftdi_device_list()[source]¶: return a list of lines, each a colon-separated vendor:product:serial summary of detected devices

`magic_candle` Module¶

Magic Candle - light falling on the LDR turns on the LED, which due: to arrangement keeps the LED on until LDR/LED path is blocked

LDR (via a transistor switch - dark = ‘1’) - D0 LED (via series resistor) - D1

pylibftdi - codedstructure 2013

class pylibftdi.examples.magic_candle.Candle[source]¶

Bases: object

run()[source]¶

`pin_read` Module¶

Display values on input pins of a BitBangDevice.

TODO:

ANSI colours / display differences in bold

example - beep on pin 1 going high:

$ pylibftdi/examples/pin_read.py -n 0.01 -m 1 -k 1 && beep

pylibftdi.examples.pin_read.display_loop(interval=1, count=0, match=None, mask=255)[source]¶

display and compare the value

@param interval - polling interval in seconds @param count - number of polls to do, or infinite if 0 @param match - value to look for to exit early @param mask - mask of read value before comparing to match @return bool - ‘ok’. either a match was made or none was requested

pylibftdi.examples.pin_read.display_value(value)[source]¶: display the given value

pylibftdi.examples.pin_read.get_value()[source]¶: get the value of the pins

pylibftdi.examples.pin_read.main(args=None)[source]¶

`serial_loopback` Module¶

test serial loopback; assumes Rx and Tx are connected

class pylibftdi.examples.serial_loopback.LoopbackTester[source]¶

Bases: object

main()[source]¶

test_loopback(lengths)[source]¶

pylibftdi.examples.serial_loopback.test_string(length)[source]¶

examples Package¶