Renesas MN4 Spezifikationen PDF herunterladen (Seite 52)

V850E2/MN4 USB CDC (Communication Device Class) Driver

R01AN0010EJ0101 Rev.1.01 Page 52 of 117

Feb 01, 2012

usbf850_getdesc

[Synopsis]

Process GET_DESCRIPTOR request.

[C language format]

void usbf850_getdesc(USB_SETUP *req_data)

[Parameters]

Parameter Description

USB_SETUP *req_data Pointer to the address storing the receive data length

[Return Value]

None

[Function]

This function is called to process standard requests that are not automatically responded by the USB function controller.

If the decoded request asks for a string descriptor, the function calls the USB data transmit processing function

(usbf850_data_send) to send a string descriptor from Endpoint0. If a descriptor other than the string descriptor is

requested, the function calls the STALL response processing function for Endpoint0 (usbf850_sendstallEP0).

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Renesas MN4 Spezifikationen Seite 52