4 Replies Latest reply on May 19, 2016 9:10 AM by user_365962704

    I2C TMOUT files

    user_365962704

      Hi,

         

      I had open the I2C component and found some interesting files, both are named TMOUT (what i guess stands for Timeout), one header and it's corresponding source file.

         

      I  found it interesting because i was trying to make the changes to avoid the while() loops inside some low level I2C functions, i found this post about it (see I2C section): http://www.mbedded.ninja/programming/microcontrollers/psoc/components

         

      The problem is that i can not find those TIMEOUT files when i build the project. Any way to include those files? I'm to blink to see the enable TMOUT checkbox?

         

      Also tried to find information about TIMEOUT_functions on the component datasheet and 5LP TRM and found nothing :/ .

         

      I'm using the CY8CKIT-059 kit.

         

      Attached a screenshot of the component files and the generated files after compilation.

         

      Carlos

        • 1. Re: I2C TMOUT files
          user_1377889

          The bad thing is: When the I2C interface was defined and released as a standard, a timeout was merely "forgotten". Thus, an I2C implementation may not have a timeout, so everything you do in that direction is "private".

             

          A timeout always needs a timer which is an additional resource consumed and it will be difficult to get the system back into a "normal" state.

             

           

             

          Bob

          • 2. Re: I2C TMOUT files
            user_365962704

            Hi Bob,

               

            I forgot to add the TMOUT files, from the comments and registers names on those files it seems to have that "additional Timer" already implemented on the fixed-function I2C block inside the 5LP. Those registers descriptions starts from page 322 on the PSoC 5LP Registers TRM.

               

            I might be wrong, but it seems suspicious to me haha.

               

            See files attached

               

            Carlos

            • 3. Re: I2C TMOUT files
              user_1377889

              Those registers descriptions starts from page 322 on the PSoC 5LP Registers TRM.

                 

              You are really reading those TRMs??? I can assure you that the average lifetime of a human is something like 86 years, don't you have better things to do?  ;-)

                 

              The only references in the I2C datasheet to "timeout" have to do with the bootloader. So in case that you detect a timeout in your I2C master, what fixup are you wanting to take?

                 

               

                 

              Bob

              • 4. Re: I2C TMOUT files
                user_365962704

                You are really reading those TRMs??? I can assure you that the average lifetime of a human is something like 86 years, don't you have better things to do?  ;-)

                   

                I don't usually read those TRM, but i couldn't find any information anywhere so i just open it and searched the register defined on the TMOUT files. Not really, this way i council sleep ;-).

                   

                I wanted to fix nothing in particular, just saw those files and find out that are not generated on the project.

                   

                Carlos