Metadata-Version: 2.1
Name: devmem
Version: 0.1.0
Summary: Python devmem clone
Home-page: https://github.com/kylemanna/pydevmem
Author: Kyle Manna
Author-email: kyle@kylemanna.com
License: MIT
Description: Python DevMem
        =============
        
        This is designed primarily for use with accessing /dev/mem on OMAP platforms.
        It should work on other platforms and work to mmap() files rather then just
        /dev/mem, but these use cases aren't well tested.
        
        All file accesses are aligned to DevMem.word bytes, which is 4 bytes on ARM
        platforms to avoid data abort faults when accessing peripheral registers.
        
        Usage
        -----
        
            Usage: devmem.py [options]
        
            Options:
              -h, --help            show this help message and exit
              -r ADDR, --read=ADDR  read a value
              -w ADDR VALUE, --write=ADDR VALUE
            						write a value
              -n NUM, --num=NUM     number of words to read
              -s WORD_SIZE, --word-size=WORD_SIZE
            						size of word when displayed
              -m FILE, --mmap=FILE  file to open with mmap()
              -v                    provide more information regarding operation
              -d                    provide debugging information
        
        
        Speed
        -----
        
        Initial testing on a BeagleBoard-xM (Cortex-A8 in a TI DM3730) shows that
        starting up the python interpreter is pretty slow:
        
            # time (echo | python)
        
            real    0m0.859s
            user    0m0.750s
            sys     0m0.102s
        
            # time python ./pydevmem.py -r 0x4830a204 -n 8
            0x4830a204:   1b89102f  00000000  00000000  000000f0
            0x4830a214:   cafeb891  0c030016  015739eb  1ff00000
        
            real    0m1.109s
            user    0m0.977s
            sys     0m0.133s
        
            # time python -S ./pydevmem.py -r 0x4830a204 -n 8
            0x4830a204:   1b89102f  00000000  00000000  000000f0
            0x4830a214:   cafeb891  0c030016  015739eb  1ff00000
        
            real    0m0.659s
            user    0m0.602s
            sys     0m0.047s
        
            # time python -S ./pydevmem.pyc -r 0x4830a204 -n 8
            0x4830a204:   1b89102f  00000000  00000000  000000f0
            0x4830a214:   cafeb891  0c030016  015739eb  1ff00000
        
            real    0m0.647s
            user    0m0.508s
            sys     0m0.133s
        
        
        System information for those tests:
        
            Linux omap 3.0.6-x3 #1 SMP Wed Oct 5 07:19:24 UTC 2011 armv7l GNU/Linux
        
            python              2.7.2-7ubuntu2
            python-configobj    4.7.2+ds-3
            python-minimal      2.7.2-7ubuntu2
            python2.7           2.7.2-5ubuntu1
            python2.7-minimal   2.7.2-5ubuntu1
        
        Something needs to be sped up to make python start-up in a reasonable amount
        of time.
        
Platform: UNKNOWN
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.8
Description-Content-Type: text/markdown
