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)