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Top Forums Shell Programming and Scripting Convert hexadecimal value in decimal value Post 302737463 by enaud on Thursday 29th of November 2012 04:20:19 AM
Old 11-29-2012
Convert hexadecimal value in decimal value

hi all,
this is my script:
Code:
#! /bin/sh

minutes=$( { i2cget -f -y 0 0x51 3; } 2>&1 )
minutes=${minutes:2}
 
hour=$( { i2cget -f -y 0 0x51 4; } 2>&1 )
hour=${hour:2}
 
day=$( { i2cget -f -y 0 0x51 5; } 2>&1 )
day=${day:2}
 
month=$( { i2cget -f -y 0 0x51 7; } 2>&1 )
month=${month:2}
 
year=$( { i2cget -f -y 0 0x51 8; } 2>&1 )
year=${year:2}
 
date -s 20$year$month$day-$hour:$minutes

i want get data and time from a RealTimeClock plugged on i2c of my embedded board and after setdate with this value.

but with i2cget command i receive an hexdecimal value like 0x54 and with year=${year:2} i have year =54 but i need convert this number to decimal, but how?

I cant use bc because in my embedded board there isnt.
thanks
 

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HYLAFAX-SHUTDOWN(5)						File Formats Manual					       HYLAFAX-SHUTDOWN(5)

NAME
etc/shutdown - server shutdown control file DESCRIPTION
If the file etc/shutdown is present it describes when a HylaFAX server is to be shutdown and may contain a descriptive message to return to clients explaining the reason for the shutdown. This file is used by the hfaxd(8) program. The file has the following format: <year> <month> <day> <hour> <minute> <deny> <disconnect> <shutdown message text> The first line defines the date and time the server should be shutdown and the time preceding at which unprivileged clients should be denied service or disconnected; these fields are described in more detail below. Any lines that follow the first are taken as the text of a message to return to clients when notifying them of a scheduled shutdown or when denying them service. <year> The decimal year; e.g. 1996. <month> The decimal month; e.g. 10 for October. <day> The decimal day of the month in the range [1..31]. <hour> The decimal hour since midnight; in the range [0..23]. <minute> The decimal minute after the hour; in the range [0..59]. <deny> The time prior to the shutdown time at which to deny service to unprivileged clients. This value is specified as decimal number in the form HHMM; e.g. 130 for 1 hour and 30 minutes. <disconnect> Time time prior to the shutdown time at which to disconnect unprivileged clients that are logged in to the server. This value is specified as a decimal number in the form HHMM. NOTES
This file is typically created using the ``SHUT'' command supported by hfaxd(8). SEE ALSO
hfaxd(8), hylafax-server(5) January 18, 1996 HYLAFAX-SHUTDOWN(5)
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