Big endianness problem [#4438]

[eprosima]

Big endianness problem [#4438]

[lemunozm]

Hi @baozeng90,

It seems to be a problem with the processor word size. Are you using the 16bits TMS570 version? Currently, we only support 32bits processor or higher.

[baozeng90]

@lemunozm
1）It‘s 32bits.But my client(TMS570) is BIG ENDIANNESS.my agent is LITTLE ENDIANNESS.
2）I have modify config.h(#define BIG_ENDIAN 1)
3) In file basic.c (function ucdr_serialize_byte_2),UCDR_MACHINE_ENDIANNESS must be UCDR_LITTLE_ENDIANNESS!?There are some similar funtions.
4) I think my problem is related to deserialize ACK from agent.
5) Now I have no idea.
bool ucdr_serialize_byte_2(ucdrBuffer* mb, const ucdrEndianness endianness, const uint16_t* bytes)
{
uint32_t data_size = sizeof(uint16_t);
uint32_t alignment = ucdr_buffer_alignment(mb, data_size);

if(ucdr_check_buffer(mb, alignment + data_size))
{
    mb->iterator += alignment;

    if(UCDR_LITTLE_ENDIANNESS == endianness) 
    {
        memcpy(mb->iterator, bytes, data_size);
    }
    else
    {
        uint8_t* bytes_pointer = (uint8_t*)bytes;
        *mb->iterator = *(bytes_pointer + 1);
        *(mb->iterator + 1) = *bytes_pointer;
    }

    mb->iterator += data_size;
    mb->last_data_size = data_size;
}
return !mb->error;

}

[lemunozm]

Hi @baozeng90,

we are working on this problem.

This issue has a PR associated: #71
I'll let you know once the PR is accepted to master

[lemunozm]

The PR #71 with the solution is already merged in master.

Please, set the variable CONFIG_BIG_ENDIANNESS of the client.config file to TRUE to compile with the big endianness behavior.