TUSB3210 USB bus Enumeration issue

victor14849

I use TUSB3210 develop a USB to IIC bridge. I download code from PC. Now my code can receive the first setup packet (get device description).

when I respond the "get device descrition", I can only send first 8 bytes to PC only. The standary packet has 18 bytes.

I write below code in setup interrupt, than I can enter the INT_INPUT_ENDPOINT0 one time.

            EP0_in_Buffer0 = 0x12;
            EP0_in_Buffer1 = bDescriptorType;
            EP0_in_Buffer2 = bcdUSB_L;
            EP0_in_Buffer3 = bcdUSB_H;
            EP0_in_Buffer4 = bDeviceClass;
            EP0_in_Buffer5 = bDeviceSubclass;
            EP0_in_Buffer6 = bDeviceProtocol;
            EP0_in_Buffer7 = bMaxPacketSize;
            IEPCNFG_0 = 0x84;                       //enable EP0 out and in interrupt
            IEPBCNT_0 = 0x08;

I write below code in the INT_INPUT_ENDPOINT0 process code, but I can't enter the interupt once more.

void Ep0InputInterruptHandler(void)
{
    IEPBCNT_0 = 0;
    OEPBCNT_0 = 0;
IEPCNFG_0 |=STALL;
    switch (T_CNT)
   {
    case 0:
  EP0_in_Buffer0 = idVendor_L;
        EP0_in_Buffer1 = idVendor_H;
  EP0_in_Buffer2 = idProduct_L;
  EP0_in_Buffer3 = idProduct_H;
  EP0_in_Buffer4 = bcdDevice_L;
  EP0_in_Buffer5 = bcdDevice_H;
  EP0_in_Buffer6 = iManufacturer;
  EP0_in_Buffer7 = iProduct;
  IEPCNFG_0 = 0x94;
  USBSTA = 0xFFFF;
        T_CNT = 1;
//  T2 = 0;

  break;
  case 1:
//  T2 = 0;
  EP0_in_Buffer0 = iSerialNumber;
        EP0_in_Buffer1 = bNumconfigurations;
  EP0_in_Buffer2 = 0;
  EP0_in_Buffer3 = 0;
  EP0_in_Buffer4 = 0;
  EP0_in_Buffer5 = 0;
  EP0_in_Buffer6 = 0;
  EP0_in_Buffer7 = 0;
  IEPCNFG_0 = 0x84;
  USBSTA = 0xFFFF;

  break;
  default:
  break;
}
}