/*
etherdev_poll()
This function will read an entire IP packet into the uip_buf.
If it must wait for more than 0.5 seconds, it will return with
the return value 0. Otherwise, when a full packet has been read
into the uip_buf buffer, the length of the packet is returned.
*/
uint16_t etherdev_poll(void)
{
uint16_t bytes_read = 0;
#if 0
/* tick_count threshold should be 12 for 0.5 sec bail-out
One second (24) worked better for me, but socket recycling
is then slower. I set UIP_TIME_WAIT_TIMEOUT 60 in uipopt.h
to counter this. Retransmission timing etc. is affected also. */
while ((!(bytes_read = etherdev_read())) && (timer0_tick() < 12)) continue;
timer0_reset();
#endif
return bytes_read;
}
void lc8670_cpu_device::execute_set_input(int inputnum, int state)
{
switch(inputnum)
{
case LC8670_EXT_INT0:
if ((REG_I01CR & 0x0c) == 0x00 && m_input_lines[inputnum] && !state) // falling edge
{
REG_I01CR |= 0x02;
if (REG_I01CR & 0x01)
set_irq_flag(1);
}
else if ((REG_I01CR & 0x0c) == 0x04 && !state) // low level
{
REG_I01CR |= 0x02;
if (REG_I01CR & 0x01)
set_irq_flag(1);
}
else if ((REG_I01CR & 0x0c) == 0x08 && !m_input_lines[inputnum] && state) // rising edge
{
REG_I01CR |= 0x02;
if (REG_I01CR & 0x01)
set_irq_flag(1);
}
else if ((REG_I01CR & 0x0c) == 0x0c && state) // high level
{
REG_I01CR |= 0x02;
if (REG_I01CR & 0x01)
set_irq_flag(1);
}
break;
case LC8670_EXT_INT1:
if ((REG_I01CR & 0xc0) == 0x00 && m_input_lines[inputnum] && !state) // falling edge
{
REG_I01CR |= 0x20;
if (REG_I01CR & 0x10)
set_irq_flag(2);
}
else if ((REG_I01CR & 0xc0) == 0x40 && !state) // low level
{
REG_I01CR |= 0x20;
if (REG_I01CR & 0x10)
set_irq_flag(2);
}
else if ((REG_I01CR & 0xc0) == 0x80 && !m_input_lines[inputnum] && state) // rising edge
{
REG_I01CR |= 0x20;
if (REG_I01CR & 0x10)
set_irq_flag(2);
}
else if ((REG_I01CR & 0xc0) == 0xc0 && state) // high level
{
REG_I01CR |= 0x20;
if (REG_I01CR & 0x10)
set_irq_flag(2);
}
break;
case LC8670_EXT_INT2:
if ((REG_I23CR & 0x04) && m_input_lines[inputnum] && !state) // falling edge
{
if (!(REG_ISL & 0x01))
timer0_tick(true);
REG_I23CR |= 0x02;
if (REG_I23CR & 0x01)
set_irq_flag(3);
}
if ((REG_I23CR & 0x08) && !m_input_lines[inputnum] && state) // rising edge
{
if (!(REG_ISL & 0x01))
timer0_tick(true);
REG_I23CR |= 0x02;
if (REG_I23CR & 0x01)
set_irq_flag(3);
}
break;
case LC8670_EXT_INT3:
if ((REG_I23CR & 0x40) && m_input_lines[inputnum] && !state) // falling edge
{
if (REG_ISL & 0x01)
timer0_tick(true);
REG_I23CR |= 0x20;
if (REG_I23CR & 0x10)
set_irq_flag(4);
}
if ((REG_I23CR & 0x80) && !m_input_lines[inputnum] && state) // rising edge
{
if (REG_ISL & 0x01)
timer0_tick(true);
REG_I23CR |= 0x20;
if (REG_I23CR & 0x10)
set_irq_flag(4);
}
break;
}
m_input_lines[inputnum] = state;
}
