通过 ULPI 接口外接高速 USB PHY USB3300EZK，执行MX_USB_DEVICE_Init()初始化函数时，程序卡在内部USB_CoreReset()步骤并发生超时。
/* Required few clock cycles before accessing USB PHY Controller Registers */
for (volatile uint32_t i = 0; i < 10; i++) {
__NOP(); // No Operation instruction to create a delay
}
/* Core Soft Reset */
USBx->GRSTCTL |= USB_OTG_GRSTCTL_CSRST;
do
{
count++;
if (count > HAL_USB_TIMEOUT)
{
return HAL_TIMEOUT;
}
} while ((USBx->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST);
return HAL_OK;
}
时钟配置如下
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