after some experiments, tx.. and rx_buf_ptr has to be 64 bits. On fps on arm, the pointer type is translated to 32 Bits.
Ludo's suggestions to use qword (64Bit) is correct.

Is there a possibility to use pointer type with 64 Bits? How ?




spi_ioc_transfer_t = record
    tx_buf_ptr,dummytx    : pointer;     (* <------------ 64 Bits              dummytx / dummyrx for spaceing *)
    rx_buf_ptr,dummyrx : pointer;
    len : longword;
speed_hz     : longword;
    delay_usecs : word;
    bits_per_word : byte;
    cs_change : byte;
    pad : longword;
  end;


Am 19.06.2012 um 19:04 schrieb Stefan Fischer:

> I've changed to following:
> added packrecord c
> flipped speed_hz and delay_usec fields
>
> same problem.
> I don't know whats really wrong.
> Is there any debug possibility?
>
>
> Am 19.06.2012 um 15:24 schrieb Jonas Maebe:
>
>>
>> Henry Vermaak wrote on Tue, 19 Jun 2012:
>>
>>> Also, the buffers need to be u64.  Is the pointer type in pascal always 64 bit?
>>
>> u64 is defined as "unsigned long". "unsigned long" is the same size as a pointer on Linux.
>>
>>
>> Jonas
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