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AO-BITBANG

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

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