Hello Gary and others,
Gray wrote:
You should not have to change the driver. The differences in
endian-ness are handled by the macros CYG_CPU_TO_LE16() and
CYG_LE16_TO_CPU(). Make sure that your HAL defines them
correctly.
The received data are reserved into data buffer in lan91cxx_recv's
line 1230 - line 1235
lan91cxx_recv()
1230: if (data) {
1231: while( clen > 0 ) {
1232: *data++ = get_data_byte(sc);
1233: clen--;
1234: }
1235: }
-->
cyg_uint8 get_data_byte(struct eth_drv_sc *sc)
{
cyg_uint8 c;
struct lan91cxx_priv_data *cpd =
(struct lan91cxx_priv_data *)sc->driver_private;
if( cpd->data_pos == sizeof(rxd_t) )
{
cpd->data_buf = get_data(sc);
cpd->data_pos = 0;
}
c = (cpd->data_buf>>(cpd->data_pos*8))&0xFF;
cpd->data_pos++;
return c;
}
-->
get_data(struct eth_drv_sc *sc)
{
rxd_t val;
struct lan91cxx_priv_data *cpd =
(struct lan91cxx_priv_data *)sc->driver_private;
#ifdef LAN91CXX_32BIT_RX
HAL_READ_UINT32(cpd->base+((LAN91CXX_DATA_HIGH & 0x7) << cpd->addrsh),
val);
#else
HAL_READ_UINT16(cpd->base+((LAN91CXX_DATA & 0x7) << cpd->addrsh), val);
#endif
#if DEBUG & 2
diag_printf("read data 0x%x\n", val);
#endif
return val;
}
-->
#define HAL_READ_UINT16( _register_, _value_ ) \
CYG_MACRO_START \
((_value_) = *((volatile CYG_WORD16 *)(_register_))); \
CYG_MACRO_END
As you can see CYG_CPU_TO_LE16() and CYG_LE16_TO_CPU() are never used,
and it is impossible to reserve data in BigEndian form without change.
Maybe at the time of interpriting ARP-request, reading data exchangedly ?
I tried to find where ARP-request is parsed and interpreted,but couldn't
find where it is.
I checked that ISR,DSR are called(although I'm not sure they are called
right time)
so I suppose that if ARP-request is correctly interpreted and ARP-reply is
made and sent out,
it will work.
I sincerely ask your favor.
Would you please let me know next few questions ?
1.I would like to know where ARP-request is parsed and interpreted,
entry function name, and if possible line numbers.
2.After ARP-request is recognised, by what sequence lan91cxx_send is called.
3.Where ARP-reply packet is made ?
entry function name, and if possible line numbers.
I look forward to your reply.
Thank you in advance.
Masahiro Ariga
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