AVR Freaks

I am designing a board that uses the WINC1500 as the WiFi module. I have written the bsp and bus_wrapper functions needed for interfacing with the SMT32F4xx. Quite a bit seems to be working in that after enabling debug printing I see the chip ID was read correctly. However the 'chip_apply_conf' function never returns. It is called by 'wait_for_bootrom'.

Debugging this I see it is looping in the following code:

  val32 |= rHAVE_RESERVED1_BIT;

  do  {

    nm_write_reg(rNMI_GP_REG_1, val32);

    if(val32 != 0) {

      uint32 reg = 0;

      ret = nm_read_reg_with_ret(rNMI_GP_REG_1, &reg);

      if(ret == M2M_SUCCESS) {

        if(reg == val32)

          break;

      }

    } else {

      break;

  }

} while(1);

It loops because the value of val32 is 0x102 while the value read from the chip (reg) is 0x182.

I don't seem to be able to find the register descriptions to work out what is going on. Anyone have a link to a datasheet describing this, or know what is failing.

Many thanks,

Sid