raspihats 2.2.2

package for controlling raspihats.com boards

This package provides the necessary code to interface the Raspberry Pi HATs(add-on boards) from raspihats.com:

Typical usage often looks like this:

#!/usr/bin/env python
# In this setup there are two I2C-HATs stacked, one DI16ac and one DQ10rly.
from raspihats.i2c_hats import DI16ac, DQ10rly

di16ac = DI16ac(0x40)   # 0x40 is the I2C bus address
dq10rly = DQ10rly(0x50) # 0x50 is the I2C bus address

while True:
    state = di16ac.di.channels[0]          # get digital input channel 0
    dq10rly.dq.channels[0] = state          # set digital output channel 0
    dq10rly.dq.channels[1] = not state      # set digital output channel 1

Listing attributes and methods(from v2.0.0)

#!/usr/bin/env python
from raspihats.i2c_hats import DI6acDQ6rly

board = DI6acDQ6rly(0x60)     # 0x60 is the I2C bus address

board.name                    # get board name, in this case 'DI6acDQ6rly'
board.status                  # get status word
board.reset()                 # reset board

# cwdt - Communication WatchDog Timer
board.cwdt.period             # get CommunicationWatchDogTimer(CWDT) period
board.cwdt.period = 1         # set CWDT period, any value greather than 0 enables the CWDT
board.cwdt.period = 0         # 0 disables the CWDT

# di - Digital Inputs
board.di.value                # get all digital input channel states, bit 0 represents channel 0 state and so on ..
board.di.channels[0]          # get digital input channel 0 state, access using channel index
board.di.channels['I0']       # get digital input channel 0 state, access using channel label
board.di.r_counters[0]        # get digital input channel 0 raising edge counter
board.di.r_counters['I0']     # get digital input channel 0 raising edge counter
board.di.r_counters[0] = 0    # reset digital input channel 0 raising edge counter
board.di.r_counters['I0'] = 0 # reset digital input channel 0 raising edge counter
board.di.f_counters[0]        # get digital input channel 0 falling edge counter
board.di.f_counters['I0']     # get digital input channel 0 falling edge counter
board.di.f_counters[0] = 0    # reset digital input channel 0 falling edge counter
board.di.f_counters['I0'] = 0 # reset digital input channel 0 falling edge counter
board.di.reset_counters()     # reset all counters(rising and falling edge) for all channels
board.di.labels               # get digital input labels

# dq - Digital Outputs
board.dq.value                # get all digital output channel states, bit 0 represents channel 0 and so on ..
board.dq.value = 0            # set all digital output channel states
board.dq.channels[0]          # get digital output channel 0 state, access using channel index
board.dq.channels[0] = 0      # set digital output channel 0 state
board.dq.channels['Q0']       # get digital output channel 0 state, access using channel label
board.dq.channels['Q0'] = 0   # set digital output channel 0 state
# PowerOnValue -- loaded to Digital Outputs at board power on
board.dq.power_on_value       # get digital output channels PowerOnValue, bit 0 represents channel 0 and so on ..
board.dq.power_on_value = 0   # set digital output channels PowerOnValue
# SafetyValue -- loaded to Digital Outputs at CWDT timeout
board.dq.safety_value         # get digital output channels SafetyValue, bit 0 represents channel 0 and so on ..
board.dq.safety_value = 0     # set digital output channels SafetyValue
board.dq.labels               # get digital output labels

Change Log

v2.2.2

• Bug fix in setup script, BCM2835 platform hardware is now recognized.

• Bug fix in robotframework interface, status.value is now returned by get_status()

v2.2.1

• Added StatusWord class. To get raw int value use board.status.value, to get beautiful string representation use str(board.status).

v2.1.1

• String representation of I2CHat object doesn’t use an I2C bus transfer any more.

• Improved exception messages

v2.1.0

• Improved exception handling

v2.0.1

• Fixed I2C clock stretch timeout setup script

v2.0.0

• Attributes are now used for accessing board parameters, rather then methods

• Added support for new boards:

  • DI16ac (replacement for Di16)

  • DQ10rly (replacement for Rly10)

  • DQ16oc

  • DI6acDQ6rly (replacement for Di6Rly6)

v1.1.1

• Added support for new boards:

  • Di16

  • Rly10

  • Di6Rly6

#!/usr/bin/env python
# In this setup there are two I2C-HATs stacked, one Di16 and one Rly10.
from raspihats.i2c_hats import Di16, Rly10

di16 = Di16(0x40)   # 0x40 is the I2C bus address
rly10 = Rly10(0x50) # 0x50 is the I2C bus address
# The I2C-HAT address high nibble is fixed(0x4 for Di16, 0x5 for Rly10), the low nibble
# value is set using the on-board address jumper, range is [0x0 .. 0xF].

while True:
    state = di16.di_get_channel_state('Di1.1')
    rly10.do_set_channel_state('Rly1', state)
    rly10.do_set_channel_state('Rly2', not state)

Installation

Install dependencies

The python-smbus package

$ sudo apt-get install python-smbus
# or if using python 3
$ sudo apt-get install python3-smbus

Install from repository

# Make sure you have git, pip and setuptools installed
$ git clone [e-mail]:raspihats/raspihats.git
$ cd raspihats
$ sudo python setup.py install
# or if using python 3
$ sudo python3 setup.py install

Install using pip

# Make sure you have pip and setuptools installed
$ sudo pip install raspihats
# or if using python 3
$ sudo pip3 install raspihats

Checkout raspihats.com