PSoC 5, 3 & 1 MCU

[AaJ_4705826]

This is the snippet of the code where I'm trying to configure the USBUART.

[NoriakiT_91 · Accepted solution]

Please try to add an additional USBUART_IsConfigurationChanged() prior USBUART_CDC_Init() as follows.

    for(;;) {
        // Wait for initialization completed
        while (USBUART_GetConfiguration() == 0);
        USBUART_IsConfigurationChanged();       // Ensure to clear the CHANGE flag
        USBUART_CDC_Init();                     // Initialize the CDC feature
        for (;;) {
            // Re-initialize if the configuration is changed
            if (USBUART_IsConfigurationChanged()) {
                break;
            }

This is required for me because Windows issues two SET_CONFIGURATION requests.

Regards,

Noriaki

[Ekta]

Hello aaja_4705826​

As already mentioned by Noriaki, windows can double send the SET_CONFIGUARTION request. Thus, you need to continuously check in a for loop if the configuration of the device has been changed and reinitialize the USB in case that case. You can do it as follows:

You can also refer to the USB UART code example for PSoC 5LP: https://www.cypress.com/documentation/code-examples/ce95396-usb-uart-psoc-35lp for  proper implementation.

Best Regards

Ekta

[Len_CONSULTRON]

aaja,

Has Noriaki or Ekta helped?

Are you willing to share your project?

Len

[Len_CONSULTRON]

aaja,

If you're using the USBUART in a conventional UART manner and if you're interested, I created a new component called "Term" that should handle many of the Terminal communication interfaces.  As the app designer you can chose to configure "Term" as a standard UART using the standard serial interface or you can configure it to use the USBUART (like that on the CY8CKIT-059).  It uses many of the same API commands as the UART component to make it very easy to configure it either way in your code.

Here's a copy of the link to the component library:

Terminal Support Component Library

I've used this component (and the other components included in the library) on many projects with great success.

Len