Virtual COM Stm32fxx and complete transfer

[Marco1]

Posted on March 23, 2016 at 10:41

Hi, 

i'm using a virtual com (without uart), someone know the way to know when the usb has complete the transfer ?

I can't make (sure) immediatly two time ''CDC_Transmit_FS''

CDC_Transmit_FS( Buf, 100 );

// here i need to know when the usb has complete the first transfer 

CDC_Transmit_FS( Buf, 100 );

Sorry for my english !

[Walid FTITI_O]

Posted on April 05, 2016 at 19:12

Hi

marco

,

You can manage several CDC_Transmit calls based on the USBH_CDC_TransmitCallback.

In this callback function, you can call the CDC_Transmit functions as it is done in the example STM32Cube_FW_F4_V1.8.0\Projects\STM324xG_EVAL\Applications\USB_Host\CDC_Standalone (have a look to the implementation in Src/cdc_send.c).

-Hannibal-

Hi, 

i'm using a virtual com (without uart), someone know the way to know when the usb has complete the transfer ?

I can't make (sure) immediatly two time ''CDC_Transmit_FS''

CDC_Transmit_FS( Buf, 100 );

// here i need to know when the usb has complete the first transfer 

CDC_Transmit_FS( Buf, 100 );

Sorry for my english !