2 Replies Latest reply on Jun 14, 2019 5:53 AM by LePo_1062026

    Interrupt to avoid polling USBUART_IsConfigurationChanged()?

    EuGe_296116

      I'm using a USBUART component in my project and I'm wondering if there's an interrupt I can get a callback from that can tell me the configuration changed.  Or do I really have to continuously poll USBUART_IsConfigurationChanged()?

        • 1. Re: Interrupt to avoid polling USBUART_IsConfigurationChanged()?
          EuGe_296116

          Figured it out.  USBUART_EP_0_ISR_ExitCallback().

          1 of 1 people found this helpful
          • 2. Re: Interrupt to avoid polling USBUART_IsConfigurationChanged()?
            LePo_1062026

            Hi,

             

            I'm having the same issue.

             

            However, I noticed the following issues.

            • I setup my "cyapicallbacks.h" file with

            #define USBUART_EP_0_ISR_EXIT_CALLBACK

            void USBUART_EP_0_ISR_ExitCallback();

                 and I have an ISR set up for executing code.  However the USBUART_drv.c file that has the original USBUART_EP_0_ISR does not allow the conditional compile unless I add the line #include "cyapicallbacks.h"  near the top of the file.  (This does not seem right).

            • Once I can compile the callback into USBUART_drv.c and execute the code, it never gets executed because the original ISR for USBUART_EP_0_ISR doesn't appear to get enabled.

            I'm having a chicken_vs_egg dilemma.  I can't USBUART_CDC_Init() unless the Configuration is correct set (determined by USBUART_GetConfiguration()).  And I can't get the Configuration set until the enumeration is completed with the PC.

             

            I know I'm missing something.  I'm not sure what it is.

             

            Len