Hi,

I'm using this uC to control a RS232 port. I enabled the interrupt

and I can read a received payload of 3 bytes by a vendor command and an interrupt routine.

I have problem when I try to write because I suppose the interrupt routine is triggered, something goes wrong and the 

uC won't answer. Could you help me?

How do I manage the writing operation skipping the interrupt?

This in the TD_Init:

 CPUCS = ((CPUCS & ~bmCLKSPD) | bmCLKSPD1) ; //Setting up the clock frequency

SYNCDELAY;

 T2CON = 0x34 ;

RCAP2H  = 0xFF ;

RCAP2L = 0xD9;

SCON0 = 0x5A ;

 Cont=0;

IE|= bmBIT4;

The interrupt routine:

#include "fx2.h"

#include "fx2regs.h"

#include "fx2sdly.h"            // SYNCDELAY macro

extern BYTE Cont;

extern BYTE rbuf[10];

void IRS_USART0(void) interrupt 4

{

if (RI != 0)

  {

  RI = 0;

  *(rbuf+Cont)=SBUF0;

  Cont++;

  if(Cont==3)

  Cont=0;

 }

else if(TI!=0)

     TI=0;

}

while (TI == 0) ;

TI = 0 ;

SBUF0 = ch ;

break;

 Hi,

 Try this 

 if(TI)

         {

if (n<=9)

      {

           SBUF0=EP2FIFOBUF[n];

           TI=0;

           n++;

      }

else

    {

            TI=0;

             n=0;

    }

}

Thanks

Prajith

 Hi, thx for your suggestion

but I need to test that in the vendor command

or in the interrupt routine?

     In Interrupt Service Routine.

 Ok,

but it's not clear how the uC manages the communication.

In RX I HAVE NOT problem.... because it's clear... for each BYTE I've an interrupt,

and I'll store the byte in a buffer and when the buffer will be complete I'll have my payload

(eventually I'll introduce a preamble and CRC...) 

But If I want to transmit a payload received by a Vendor Command

why I need to use the Interrupt?

It has no sense for me.

So with your example I need to write n>0in a correspondig vendor Command  to trigger the interrupt?

And only in the interrupt routine I'll write with SBUF=something?

Bye

 Hi,

  You can do it either using interrupt as explained in http://www.cypress.com/?id=4&rID=55681 or by checking endpoint buffer flags as in http://www.cypress.com/?rID=40248.

Thanks

Prajith

I'm going to study this examples.

Thx for you help!!!