# Where can I get the signature descriptions for I2C\_WriteToSlave and I2C\_ReadFromSlave, ie. I2C\_HW.LIB **URL:** \ **Category:** Rabbit Software\ **Tags:** 72d, dcrabbit\_version10\ **Created:** [March 26, 2020, 8:53am UTC](https://forums.digi.com/t/where-can-i-get-the-signature-descriptions-for-i2c-writetoslave-and-i2c-readfromslave-ie-i2c-hw-lib/21214 "2020-03-26T08:53:09Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![John\_Haechten](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@John\_Haechten](https://forums.digi.com/u/John_Haechten)\ **Post date:** [March 26, 2020, 8:53am UTC](https://forums.digi.com/t/where-can-i-get-the-signature-descriptions-for-i2c-writetoslave-and-i2c-readfromslave-ie-i2c-hw-lib/21214/1 "2020-03-26T08:53:09Z")
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**Author:** ![TomCollins](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/tomcollins/32/37_2.png) [@TomCollins](https://forums.digi.com/u/TomCollins)\ **Post date:** [March 27, 2020, 2:23pm UTC](https://forums.digi.com/t/where-can-i-get-the-signature-descriptions-for-i2c-writetoslave-and-i2c-readfromslave-ie-i2c-hw-lib/21214/2 "2020-03-27T14:23:42Z")
In an editor window of the IDE (e.g., your source code), place the cursor inside (or just after) the word I2C\_WriteToSlave and press CTRL-H. You’ll get the function help for that function. If it isn’t informative enough, you can click on “View Source” to go to the library where that description/code appears. You can also “Find in Files” with SHIFT-CTRL-F and search the libraries and samples (I use “C:\DCRABBIT\_10.72\*.c;_.lib;_.h” as my file mask – update your directory as appropriate) for all occurrences of a given function name or character sequence. I use that to find the source code of functions that don’t have function help (CTRL-H) available. ---
**Author:** ![TomCollins](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/tomcollins/32/37_2.png) [@TomCollins](https://forums.digi.com/u/TomCollins)\ **Post date:** [April 14, 2020, 9:59pm UTC](https://forums.digi.com/t/where-can-i-get-the-signature-descriptions-for-i2c-writetoslave-and-i2c-readfromslave-ie-i2c-hw-lib/21214/3 "2020-04-14T21:59:08Z")
Also note that there was a patch to the I2C code in Dynamic C 10.72D: [https://github.com/digidotcom/DCRabbit\_10/commit/c08fe198ac1e28dd7e1c4471bd3ba401510ffa12](https://github.com/digidotcom/DCRabbit_10/commit/c08fe198ac1e28dd7e1c4471bd3ba401510ffa12)