Hi everyone

data flow

pc->>usocket----->>>dma---->>>psockets----GPIF----

 FLAGA is dedicated to thread0 ,Flagb is dedicated to thread1,Flagc is dedicated to theread2,and so on.

part code
fx3_DmaCallback_EP2 (....)
void fx3_DmaCallback_EP2 (
CyU3PDmaChannel *chHandle,
CyU3PDmaCbType_t type,
CyU3PDmaCBInput_t *input)
{
//uint16_t index;
CyU3PDmaBuffer_t buf_p,inBuf_p,outBuf_p;
CyU3PReturnStatus_t status = CY_U3P_SUCCESS;
if (type == CY_U3P_DMA_CB_PROD_EVENT)
{
// for debug
status = CyU3PDmaChannelGetBuffer(chHandle,&inBuf_p,CYU3P_NO_WAIT);
status = CyU3PDmaChannelCommitBuffer (chHandle, input->buffer_p.count, 0);
...............................
}
I used CyU3PDmaChannelGetBuffer() API to find data form pc..the CyU3PDmaChannelCommitBuffer () function is return success. my question is why was not the FLAGC signal change
thanks

 

Hi,

As you mentioned in your post, Flag C indicate the status of the Thread 2.

And this is on the GPIF side. It is nothing to do with the endpoint number.

I would like to see how you created a DMA channel between U-port and the GPIF side.

Thanks,

sai krishna.

Hi

thanks your reply

The code of Creating channel  is below

    dmaCfg.size =64;
    dmaCfg.count = CY_FX_FW_DMA_BUF_COUNT;
    dmaCfg.prodSckId = CY_U3P_UIB_SOCKET_PROD_2 ;
    dmaCfg.consSckId = CY_U3P_PIB_SOCKET_2;
    dmaCfg.notification = CY_U3P_DMA_CB_PROD_EVENT;
    dmaCfg.cb = fx3_DmaCallback_EP2;

    apiRetStatus = CyU3PDmaChannelCreate (&gDMAChn_EP0x02_PSOCKET2, CY_U3P_DMA_TYPE_MANUAL, &dmaCfg);
    if (apiRetStatus != CY_U3P_SUCCESS)
    {
        fx3_debug_print ("CyU3PDmaChannelCreate failed, Error code = %d\n", apiRetStatus);
        fx3_error_handler(apiRetStatus);
    } 

Hi

I used project in the accessory.please help me check it out.
thanks.

 

Hi

I used project in the accessory.please help me check it out.
thanks.

 

Hi

sorry

my  project in the accessory is not post.

Can you try the following thing:

Comment out the CyU3PDmaChannelGetBuffer;

if (type == CY_U3P_DMA_CB_PROD_EVENT)
{
// for debug
/* status = CyU3PDmaChannelGetBuffer(chHandle,&inBuf_p,CYU3P_NO_WAIT); */
status = CyU3PDmaChannelCommitBuffer (chHandle, input->buffer_p.count, 0);
...............................
}

Now you can try sending the data to EP2 from the host PC connected to FX3. Check the flag status in this case.

Thanks,

sai krishna.

Hi

thanks your reply

I try it again.