TS-4900 NVRAM

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Revision as of 16:57, 17 January 2022 by Lionel (talk | contribs) (Links auto-updated for 2022 re-branding ( https://github.com/embeddedarm/ts4900-utils/ →‎ https://github.com/embeddedTS/ts4900-utils/ https://github.com/embeddedarm/ts4900-utils/blob/master/src/nvram.h →‎ https://github.com/embeddedTS/ts4900-utils/blob/master/src/nvram.h https://github.com/embeddedarm/ts4900-utils/blob/master/src/nvram.c →‎ https://github.com/embeddedTS/ts4900-utils/blob/master/src/nvram.c))

The RTC includes 128 bytes of NVRAM which can be used for custom applications. The utility 'nvramctl' can be used to read/write the NVRAM. The source for this utility is available from our ts4900-utils github.

The utility reads/writes a byte at a time, and returns the value in hex. 

nvramctl --addr 10 --set 0x40
nvramctl --addr 10 --get
# Returns "nvram10=0x40".
# This can also be used with eval
eval $(nvramctl --addr 10 --get)
echo $nvram10
# Returns "0x40"

The NVRAM code can be included in your application by using these two files:

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