NAME

       ao-bitbang - Low-level cc1111 interface diagnostic tool

SYNOPSIS

       ao-bitbang

DESCRIPTION

       ao-bitbang  connects  through a CP2103 usb-to-serial converter and uses the GPIO pins to communicate with
       the debug port on a cc1111 device. It provides raw access to the debug pins  to  help  debug  the  lowest
       level communication path.

USAGE

       ao-bitbang  reads a sequence of bit manipulations from stdin, sends them to the device and reports status
       on stdout.

       Each line on stdin should contain a single letter command for each of the three debug lines on the cc1111
       --  clock, data and reset. Each bit can be in one of three states -- on (C, D or R), off (.) or tri-state
       (-) for input. Empty lines, or lines starting with '#' are ignored. Anything beyond the  last  bit  in  a
       line  is  also  ignored. The bits must be listed in the correct order, and the 'on' values must match the
       desired bit.

EXAMPLE

       Reset the target device
               # reset
               C D R
               C D R
               C D R
               C D R

       Get Chip ID
               #
               # Debug mode - drive RESET_N low for two clock cycles
               #
               C D R
               . D .
               C D .
               . D .
               C D .
               . D R

               #
               # GET_CHIP_ID

               C . R    0
               . . R
               C D R    1
               . D R
               C D R    1
               . D R
               C . R    0
               . . R

               C D R    1
               . D R
               C . R    0
               . . R
               C . R    0
               . . R
               C . R    0
               . . R

               #
               # start reading again
               #

               C D R
               . - R
               C - R
               . - R
               C - R
               . - R
               C - R
               . - R

               C - R
               . - R
               C - R
               . - R
               C - R
               . - R
               C - R
               . - R

               C - R
               . - R
               C - R
               . - R
               C - R
               . - R
               C - R
               . - R

               C - R
               . - R
               C - R
               . - R
               C - R
               . - R
               C - R
               . - R

               C D R

AUTHOR

       Keith Packard

                                                   ao-bitbang                                      AO-BITBANG(1)