# How do we use C Script box? **URL:** \ **Category:** PLECS\ **Tags:** c-script, \#c\ **Created:** [February 3, 2018, 1:23am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263 "2018-02-03T01:23:04Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Aviral](https://avatars.discourse-cdn.com/v4/letter/a/9e8a1a/32.png) [@Aviral](https://forum.plexim.com/u/Aviral)\ **Post date:** [February 3, 2018, 1:23am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/1 "2018-02-03T01:23:04Z")
How are inputs and outputs defined in the code? Do we need a main function to run it? Is a do-while loop required to run it forever? or it loops itself as in Arduino. ---
**Author:** ![Falk\_Kyburz](https://avatars.discourse-cdn.com/v4/letter/f/67e7ee/32.png) [@Falk\_Kyburz](https://forum.plexim.com/u/Falk_Kyburz)\ **Post date:** [February 5, 2018, 3:53am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/2 "2018-02-05T03:53:39Z")
Hello Aviral, Keep in mind that using the C-Script block is non-trivial and requires some deeper knowledge of PLECS. Try using PLECS blocks to create the required function first. To start using the C-Script block, have a look at the C-Script chapter in the documentation and try some of the examples. Best Regards Falk ---
**Author:** ![rcolbeck](https://avatars.discourse-cdn.com/v4/letter/r/76d3ee/32.png) [@rcolbeck](https://forum.plexim.com/u/rcolbeck)\ **Post date:** [February 14, 2018, 6:26pm UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/3 "2018-02-14T18:26:41Z")
It’s not too bad to figure out. As Falk said start by reading the documentation and looking at the examples. It took me about a day to go through that and then try some simple scripts. I’m no expert now but I am now able to do state machines (although Plexim provides native support for state machines) and logic blocks in c-script. I’m actually converting some of these from Verilog into C. I use a trigger so that the c-script is only executed on certain clock edges. It then might do a bunch of If/then/else statements, and updates its outputs, until asked to execute again. …Roger ---
**Author:** ![Sikander](https://avatars.discourse-cdn.com/v4/letter/s/b2d939/32.png) [@Sikander](https://forum.plexim.com/u/Sikander)\ **Post date:** [April 12, 2018, 11:49pm UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/4 "2018-04-12T23:49:15Z")
@Roger Need help about C-Script ---
**Author:** ![rcolbeck](https://avatars.discourse-cdn.com/v4/letter/r/76d3ee/32.png) [@rcolbeck](https://forum.plexim.com/u/rcolbeck)\ **Post date:** [April 13, 2018, 12:27am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/5 "2018-04-13T00:27:26Z")
How can I help? Late here. Will try to answer tomorrow if you can give me some details. Roger ---
**Author:** ![Sikander](https://avatars.discourse-cdn.com/v4/letter/s/b2d939/32.png) [@Sikander](https://forum.plexim.com/u/Sikander)\ **Post date:** [April 13, 2018, 3:38am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/6 "2018-04-13T03:38:27Z")
I am trying to build MPPT block on C-script, there is no error in code. But still not getting desired duty cycle. Attached is the algorithm i implemented on C-script. Please guide me what changes i need to make. [MPPT.docx](https://forum.plexim.com/uploads/short-url/jK8ySB4oIv8yM16C3j3rF5EidlW.docx) (294 KB) ---
**Author:** ![rcolbeck](https://avatars.discourse-cdn.com/v4/letter/r/76d3ee/32.png) [@rcolbeck](https://forum.plexim.com/u/rcolbeck)\ **Post date:** [April 13, 2018, 11:17am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/7 "2018-04-13T11:17:52Z")
ok probably best if someone from Plexim could help you but if I will try to find time to look at this, maybe this weekend. …Roger ---
**Author:** ![Sikander](https://avatars.discourse-cdn.com/v4/letter/s/b2d939/32.png) [@Sikander](https://forum.plexim.com/u/Sikander)\ **Post date:** [April 16, 2018, 12:14am UTC](https://forum.plexim.com/t/how-do-we-use-c-script-box/263/8 "2018-04-16T00:14:03Z")
Okay thanks. Will contact you soon.