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After Demo DDR INIT, a USB FAIL issue occurred.

SL1
Associate III

I am using Baremetal.

On my custom board, I successfully loaded the driver for the OTG USB device as a printer. When it succeeded, the code size was small, so I worked on it as a test in the SYSRAM base without any issues (I did not use USBX).

However, as the code size increased, I needed to use DDR RAM. After executing the DEMO DDR INIT code, the previously successful code no longer proceeds at the following part.

In the PCD INIT function,

 

for (i = 0U; i < hpcd->Init.dev_endpoints; i++)

{

/* Init ep structure */

hpcd->IN_ep[i].is_in = 1U;

hpcd->IN_ep[i].num = i;

hpcd->IN_ep[i].tx_fifo_num = i;

/* Control until ep is activated */

hpcd->IN_ep[i].type = EP_TYPE_CTRL;

hpcd->IN_ep[i].maxpacket = 0U;

hpcd->IN_ep[i].xfer_buff = 0U;

hpcd->IN_ep[i].xfer_len = 0U;

}

it does not exit the for loop and keeps running continuously. Please explain why this issue occurs.

 

SL1_0-1721638181841.png

 

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