LPC MicrocontrollersのトピックCan we call USBD_API->hw->WriteEP from outside EPHandler?

Can we call USBD_API->hw->WriteEP from outside EPHandler?

ssudhir — Fri, 19 Apr 2019 15:51:33 GMT

Hi,

In the HID generic sample code the call that sends input report through interrupt pipe

(USBD_API->hw->WriteEP(hUsb, pHidCtrl->epin_adr, inbuffer, 64)) is inside EPHandler.

Suppose we have an input report we want to send through interrupt pipe can we call this function (WriteEP) from outside the EPHandler? The parameter pHidCtrl, hUSB are from EPHandler .

Thanks

Re: Can we call USBD_API->hw->WriteEP from outside EPHandler?

jeremyzhou — Mon, 22 Apr 2019 01:58:04 GMT

Hi S S ,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1） Suppose we have an input report we want to send through interrupt pipe can we call this function (WriteEP) from outside the EPHandler?
-- Yes, It's Okay.

Have a great day,
TIC

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Re: Can we call USBD_API->hw->WriteEP from outside EPHandler?

ssudhir — Mon, 22 Apr 2019 12:58:52 GMT

Thanks for your response TIC.

What about parameter passing ? Parameters pHidCtrl, hUSB are from

EPHandler. Atleast hUSB is a global variable.

Re: Can we call USBD_API->hw->WriteEP from outside EPHandler?

jeremyzhou — Tue, 23 Apr 2019 06:16:08 GMT

Hi S S ,

To provide the fastest possible support, I'd like to suggest that you can refer to the USB ROM examples in the LPCOpen library, for instance, there's the code of the hid_mouse demo which is from the lpcopen_3_01_keil_iar_mcb_4357.

/* Mouse tasks */
void Mouse_Tasks(void)
{
 /* check device is configured before sending report. */
 if ( USB_IsConfigured(g_mouse.hUsb)) {
  if (g_mouse.tx_busy == 0) {
   /* update report based on board state */
   Mouse_UpdateReport();
   /* send report data */
   g_mouse.tx_busy = 1;
   USBD_API->hw->WriteEP(g_mouse.hUsb, HID_EP_IN, &g_mouse.report[0], MOUSE_REPORT_SIZE);
  }
 }
 else {
  /* reset busy flag if we get disconnected. */
  g_mouse.tx_busy = 0;
 }

}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Have a great day,
TIC

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Re: Can we call USBD_API->hw->WriteEP from outside EPHandler?

ssudhir — Thu, 25 Apr 2019 12:30:24 GMT

thanks