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Library to access various I2C/SPI/GPIO-accessible chips over Cypress CY7C65211/3/5 USB-to-UART/I2C/SPI/GPIO bridge.

Project description

Python library to access Cypress CY7C6521x (CY7C65211, CY7C65213, or CY7C65215) USB-Serial bridge (USB to UART/I2C/SPI/GPIO) chip. Also includes library to access various chips over I2C/SPI. Currently includes driver for

  • Nordic nRF24L01 wireless tranceiver (SPI)
  • InvenSense MPU-6050 3-axis accelerometer + 3-axis gyroscope (I2C)
  • Honeywell HMC5883L 3-axis magnetometer (I2C)
  • Si4702 FM radio receiver (I2C for now, additional SPI-mode ongoing)

## Usage (CY7C6521x)

>>> from ucdev.cy7c65211 import CyUSBSerial, CyGPIO, CySPI
>>>
>>> # load DLL provided by Cypress
>>> lib = CyUSBSerial(lib="cyusbserial")
>>>
>>> # use first device found
>>> dev = lib.find().next()
>>>
>>> # access GPIO
>>> gpio = CyGPIO(dev)
>>> gpio.set(3, 1)
>>> ret = gpio.get(3)
>>>
>>> # access each GPIO pin
>>> pin = gpio.pin(3)
>>> pin.set(1)
>>> ret = pin.get()
>>>
>>> # access SPI
>>> spi = CySPI(dev)
>>> ret = spi.send("any-data-to-be-clocked-out")

## Usage (nRF24L01)

>>> from ucdev.nrf24 import *
>>>
>>> tx = nRF24(CySPI(dev), CE=CyGPIO(dev).pin(0))
>>> tx.reset(MODE_SB|DIR_SEND)
>>> tx.TX_ADDR = tx.RX_ADDR_P0 = 0xB3B4B5B6C2
>>> tx.send("some-payload-len-of-max-32-bytes")
>>>
>>> print tx.FIFO_STATUS.TX_EMPTY
>>> print tx.CONFIG

## Note This requires cyusbserial.dll (or libcyusbserial.so) library provided by Cypress.

Current development focuses on GPIO and SPI features to use Nordic nRF24 wireless tranceiver chip. See sample scripts under bin/ folder for the detail.

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