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thanks, erik

Then Je Gold, Is correct my theory??

Erik, What do you think about this? or somebody, please.

Thanks

Thanks Je Gold,

Then the code of notouch for 935 for ISP mode must be:

PGM_MTP  EQU 01f00H
no_touch935:
    push IEN0
    clear EA
    mov A, #02
    mov R5,#1F     ;   BootVector for ISP mode 
    mov R7,#03
    lcall PGM_MTP
    pop    IEN0
    RET


What do you thing?

Hi,

When i execute no_touch with the debugger of uVision I'm watching the dissembler window and i have a dude, When I call the function "lcall PGM_MTP"  of no_touch935, the program go to direction FF03 and in this direction there are these operations:

FF03     RL A
FF04     JMP @A+DPTR

Depends where i have the function of no_touch the DPTR can change, and then the program go to a one site of my code or another site, and the next sentence (pop IEN0) often never it is executed.

I don't know if this is correct, or if i have a mistake in the code.

Because when i program my device and i execute no_touch935 (with a string in UART or other system), i don't know what the device must do.

Thanks. I wish program within problems my device once by all.

Ok, but, Must i have the break detect enable, or not?, I think that Break detect affects my uC and alwais go to ISP mode. Is necessary or not?

With No_touch, Can I program the same device more than once?, once that i have notouch in my code, Can I discriminate the uC?

for use no_touch, Must I use hyperterminal of Windows, or the Terminal of flashMagic, no?

Thanks for all, i think that finally this design will work correctly If god wants.

Then, What do you recomend me for going into ISP mode with this uC?
How can i do the different activator?

My design works with 31 P89LPc935, one is the master and the others are the slaves, the master is connected with slaves with I2C. Master and Slaves have differents codes, then i need program differents software. I have connected the 31 uC to the same Serial Line (RS232).

So, I need that when i'm programming the Master the slaves aren't in ISP mode, and viceversa. My problem is that always when I programming my devices with the code within UART interrut set, when i intent program another time the uC, the uC don't respond.

Then, What is the procedure for that i don't have this problems? I wish program the device one and more times. What must I do?

Must I remove the notouch935 function, o remove the RST signal?

Thanks.

Sorry,

My procedure is the following:
1.- First I switch on the power source
2.- I put the jumper of RST in the correct position for one or other device that i wish program
3.- I use Flash Magic for programming

I don't understand because if I don't push the bottom the device go into the ISP mode.

Then,

How can i discriminate in the programming one or other device with RST signal? and How can i do that only one device go into the ISP mode and the other no?

How do i go into the ISP mode with this conditions?

How can i use the notouch935(); function?

Hello,

I have a problem. I use one Serial of my computer for programing two P89LPC935. Then, I have a board that create the signal of RST (the three pulses), and in this board i have a jumper for transmiting the RST to one or other device.

I wish program one, and after the other. But I can't do this. Always I program both, because both are in ISP mode, but i transmit my RST only a one device, then i don't understand because both are in ISP mode. I think that It is cause of Break Detect, but i'm not sure.

In the code i have put the no_touch935() in this form:

   if (received_char == 'F')
      {
      uart_transmit('F');
      no_touch935();
      }

and the uart_init();

void uart_init(unsigned char address,unsigned char mask)
{
  // configure UART
  // clear SMOD0
  PCON &= ~0x40;
  SCON = 0xB0;
  // set or clear SMOD1
  PCON &= 0x7f;
  PCON |= (0 << ;
  SSTAT = 0xF1;

  // configure address and mask
  SADDR = address;
  SADEN = mask;

  // enable break detect
  AUXR1 |= 0x40;

  // configure baud rate generator
  BRGCON = 0x00;
  BRGR0 = 0xF0;
  BRGR1 = 0x02;
  BRGCON = 0x03;

  // TxD = push-pull, RxD = input
  P1M1 &= ~0x01;
  P1M2 |= 0x01;
  P1M1 |= 0x02;
  P1M2 &= ~0x02;

  // initially not busy
  mtxbusy = 0;

  // enable uart receive interrupt
  ESR = 1;
  // enable uart transmit interrupt
  EST = 1;

} // uart_init


Then now I am in a point that i don't know how continue for the devices work correct.

My procedure is the following one:




I have lost more P89LPC935, and i'm tired of changing one and one more. Thanks.