STM32Cube CDC new Endpoint

[z1060]

Posted on October 21, 2014 at 08:53

I creat new USB CDC project and add new IN Endpoint (0x83). I correct USBD_CDC_TransmitPacket for new Endpoint (0x83). Yet data transfer not working.

What should I do

to my IN Endpoint (0x83) worked? #stm32cube #usb

[Montassar BEN ROMDHANE_O]

Posted on October 21, 2014 at 09:56

Hi, 

Are there any changes that impact the descriptor ? Have you made any modifications on the descriptor ?With any STM32Cube FW package are you working ?Regards,Heisenberg.

[z1060]

Posted on October 21, 2014 at 10:12

I add new endpoint in descriptor (

function

USBD_CDC_CfgFSDesc) and

initialized

endpoint in USBD_CDC_Init

function

.

I replaced the CDC_IN_EP for a new IN endpoint (0x83)

in

function

USBD_LL_Transmit (inside USBD_CDC_TransmitPacket). I use 1.3.0 version FW.

[Montassar BEN ROMDHANE_O]

Posted on October 21, 2014 at 16:24

Hi,

Can you provide your usbd_conf.c file, the CDC class modified files, and also your main.c file, to have enough insight into what specifically you are doing, and how.Regards,Heisenberg.

[z1060]

Posted on October 22, 2014 at 07:50

I just

changed the

function

USBD_CDC_TransmitPacket.

uint8_t USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev, uint8_t ep_num)
{ 
USBD_CDC_HandleTypeDef *hcdc = pdev->pClassData;
if(pdev->pClassData != NULL)
{
if(hcdc->TxState == 0)
{
/* Tx Transfer in progress */
hcdc->TxState = 1;
/* Transmit next packet */
USBD_LL_Transmit(pdev,
ep_num,//CDC_IN_EP
hcdc->TxBuffer,
hcdc->TxLength);
/* Tx Transfer in progress */
// hcdc->TxState = 1;
return USBD_OK;
}
else
{
return USBD_BUSY;
}
}
else
{
return USBD_FAIL;
}
}

If you call

ep_num

=0x81,

the transmission

operates. If

ep_num=0x82 (or 0x83), 

the transmission

does not work

. https://my.st.com/public/STe2ecommunities/mcu/Lists/STM32Java/Attachments/1751/files.7z ________________ Attachments : files.7z : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HzSz&d=%2Fa%2F0X0000000bME%2FNADvGkWiUyzgQ6DK4ie.J5L2zqeRPaaff0f3hKx_uoI&asPdf=false