Lpc2000

Try waiting for ((LSR & 0x60) == 0x60) to be true before switching 
your driver. That may help.

You still may have to start a timer and wait for an interrupt from 
that timer to actually reverse driver direction.


--- In lpc2000@yahoogroups.com, "sebfr74" <seb.jacquemard@9...> 
wrote:
> Hi,
> I use UART1 to make a rs485 with GPIO0.10 for the direction.
> I've got a problem, when I look the transmission with an 
oscilloscope 
> the sens go to level 0 just before the last character.
> I do this :
> ("p" is a pointer to the string to transfer and "n" the number of 
> characters)
> 
> do{
>    while (!(U1LSR & 0x20)) watchdog(); 
>    U1THR = *p++;
> } while (--n);
> 
> while (!(U1LSR & 0x20)) watchdog(); //wait last character transmit 
> 					
> IOCLR0=SENS; //SENS=Rxd --> rs485 in reception