Metadata-Version: 1.0
Name: pyenergy
Version: 0.1rc2
Summary: An interface to the MAGEEC energy monitor boards
Home-page: UNKNOWN
Author: James Pallister
Author-email: james.pallister@bristol.ac.uk
License: GPLv3
Description: ====================================
        The pyenergy and platformrun modules
        ====================================
        
        Pyenergy
        ========
        
        This python module can be used in two ways, to script the energy monitor, and
        to configure the energy monitoring boards. This module is used by platformrun
        to communicate with the energy monitor, and implements commands such as
        setting up the energy monitoring, as well as pin triggering.
        
        The energytool is also exposed by this module, allowing commandline access to
        the energy monitors.
        
        ::
        
            $ energytool -h
        
            Energy tools
        
            Usage:
                energytool (-m MPOINT)... [options] read SERIAL PIN
                energytool (-m MPOINT)... [options] continuous SERIAL
                energytool (-m MPOINT)... [options] debug SERIAL
                energytool list
                energytool changeserial SERIAL NEWSERIAL
        
            Commands:
                read            This sets up a trigger on the specified PIN and waits for
                                an energy measurement.
        
                continuous      Continuously read measurements from the specified energy
                                monitor.
        
                debug           Output some debug data about the instantaneous voltages
                                seen on the ADCs, along with current and voltage.
        
                list            Show the serial numbers and API version of each connected
                                energy monitor.
        
                changeserial    Connect to the device specified by SERIAL, and change the
                                serial to NEWSERIAL
        
        
        Scripting
        ---------
        
        The module exposes one class, EnergyMonitor. This class can be instantiated as such::
        
            em = pyenergy.EnergyMonitor("EE00")
        
        Up to three of the four measurement points can then be enabled::
        
            em.enableMeasurementPoint(1)
        
        Measurement can be started and stopped in a similar way::
        
            em.start(1)
            em.stop(1)
        
        This allows the measurement to be manually started and stopped. A pin to automatically start and stop measurements can be set up too. Note the ``start`` call is not needed for this, as the device will automatically start. The device can then be polled for a completed measurement::
        
            em.setTrigger("PA0", 1)
        
            while not em.measurementCompleted(1):
                sleep(0.1)
        
            m = em.getMeasurement(1)
        
        The above snippet sets a trigger on PA0. The returned measurement has several properties with metrics about the run::
        
            m.energy        # Energy, joules
            m.time          # Time between start and stop
            m.avg_power     # Average power throughout the run
            m.avg_current   # Average current throughout the run
            m.avg_voltage   # Average voltage throughout the run
        
        Platform run
        ============
        
        These scripts form the basis to easily run binaries on a range of platforms.
        For example, to run a binary on the STM32F0DISCOVERY board, this is simply the
        following command line invocation::
        
            $ platformrun stm32f0discovery program.elf
            Energy:            27.386 mJ
            Time:             626.119 ms
            Average current:   14.382 mA
            Average voltage:    3.041 V
        
        The compilation of programs to run on the target architecture is out of scope
        for this document. The only particular feature a program must have, is that it
        asserts a digital 1 on a pin when it wants the measurement to start, and
        returns to 0V when the measurement should end.
        
        Two configuration files are needed by platformrun, one describing the set of
        up the energy monitors, and one describing where platformrun can find all the
        tools necessary to run on a specific platform. The first file must be created
        manually - it is specific to the way you connect the boards, and the serial
        numbers given to the energy monitors.
        
        A detection script is provided to find locations of the tools necessary to run
        binaries on a platform. The configuration of the location of tools, and
        enabled platforms is kept in ``~/.platformrunrc``.
        
        The configuration file is set up as follows::
        
            $ platformrun-detect
        
            Summary
        
            pic32mx250f128b           disabled
            stm32vldiscovery          enabled
            atmega328p                enabled
            stm32f0discovery          enabled
            msp-exp430fr5739          enabled
            msp-exp430f5529           enabled
        
        This will try to automatically detect where the required executables are.
        
        List of platforms
        -----------------
        
        Currently, several different platforms are set up to easily have programs run
        via platform run.
        
        STM32F0DISCOVERY
        ~~~~~~~~~~~~~~~~
        
        This board contains a cortex-m0. Stlink is used as a gdb-server and an arm
        debugger is used to flash the code to the board.
        
        Platform name: ``stm32f0discovery``
        
        Prerequisites for running:
         - st-util (st-link package)
         - arm-none-eabi-gdb (or other arm gdb-compatible debugger)
        
        
        ATMEGA328P
        ~~~~~~~~~~
        
        This is an ATMEGA328P chip, loaded with an arduino compatible bootloader. This
        is programmed with a USB to serial converter and avrdude. This was tested on a
        breadboarded ATMEGA328P chip, with a FTDI USB to serial converter.
        
        Platform name: ``atmega328p``
        
        Prerequisites for running:
         - avrdude
         - avr-objcopy
        
        
        PIC32MX250F128B
        ~~~~~~~~~~~~~~~
        
        This is a 32-bit pic chip, tested on a breadboard and hooked up to a pickit2.
        This requires pic32prog (so that no bootloader is needed on the PIC chip) and
        the pic32 tools to convert the elf to a hex file.
        
        Platform name: ``pic32mx250f128b``
        
        Prerequisites for running:
         - pic32prog
         - pic32-objcopy
        
        
        Measurement configuration
        -------------------------
        
        The measurement configuration file tells platformrun about the energy monitors
        connectted to the platforms, and some additional details about the platforms.
        For example, to measure the stm32f0discovery, the application needs to know the
        serial number of the energy measurement device, as well as the measurement
        point and the shunt resistor value. Other platforms have additional details,
        such as atmega328p, which needs to know the ID of the USB-serial adaptor.
        
        The measurement config is a standard JSON format file, and by default is
        loaded from ``~/.measurementrc``. An example of the measurement configuration
        for the stm32f0discovery platform is given below.
        
        ::
        
            {
                "stm32f0discovery" : {
                    "energy-monitor" : "CXM0",
                    "trigger-pin" : "PA0",
                    "measurement-point" : 1,
                    "resistor" : 1
                }
            }
        
        
        Basic configuration
        ~~~~~~~~~~~~~~~~~~~
        
        Keys:
         - energy-monitor. This specifies the serial number of the energy monitor that
           is used for this platform.
         - trigger-pin.  This specifies the pin on which the platform will trigger the
           energy monitor.
         - measurement-point. Which measurement point is connected to the platform.
         - resistor. The value of the shunt resistor that intercept's the platform's
           power supply.
        
        Platform specific keys
        ~~~~~~~~~~~~~~~~~~~~~~
        
        Keys for ``atmega328p``:
         - serial-dev. This specifies the ID of the USB to serial device. This ID comes
           directly from the link found in /dev/serial/by-id/ when the adapter is
           plugged in. By selecting the ID this way, multiple similar USB-serial
           adapters can be uniquely specified.
        
        Keys for ``pic32mx250f128b``:
         - serial-number. This specifies the serial number of the pickit2 connected to
           the platform (not currently used).
        
        
Keywords: energy monitor MAGEEC
Platform: UNKNOWN
