[fpc-devel] Problems with fpioctl on ARM debian linux and FPC2.6

[Stefan Fischer]

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
>> _______________________________________________
>> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
>> http://lists.freepascal.org/mailman/listinfo/fpc-devel
> 
> _______________________________________________
> fpc-devel maillist  -  fpc-devel at lists.freepascal.org
> http://lists.freepascal.org/mailman/listinfo/fpc-devel