TS-4900 NVRAM: Difference between revisions
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The RTC includes 128 bytes of NVRAM which can be used for custom applications. | 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 [https://github.com/embeddedarm/ts4900-utils/ ts4900-utils github]. | ||
[https://github.com/embeddedarm/ts4900-utils/ ts4900-utils github]. | |||
The utility reads/writes a byte at a time, and returns the value in hex. | The utility reads/writes a byte at a time, and returns the value in hex. | ||
Revision as of 14:11, 6 March 2019
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: