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Re:LPC17xx spi simulation

Thanks for your reply.
i found the problem. As u rightly pointed out the problem was with the settings.
i have some questions
first is that SPDR register value never changes why is that?
second what is spi_out? is this signal same as MOSI?
thanks again for ur reply

regards

Parents

0 Rahul Sen over 15 years ago in reply to while ();

Thanks for your reply.
when i tried to run the following program i never got any value set in SPDR register at any point of time.

        while(1)
        {
                  LPC_SPI->SPDR = byte;
                  byte++;
                  while(!(LPC_SPI->SPSR & 0x80));
        }

then i used the following simulation script for SPI_IN

signal void spi_func (void) {
while (1) {
  wwatch (SPI_OUT);
  printf ("SPI_OUT: %2.2X\n", (unsigned) SPI_OUT);
  SPI_IN = SPI_OUT + 1;
  }
}

with following program

                  LPC_SPI->SPDR=byte;
                  while(!(LPC_SPI->SPSR & 0x80));
                  byte=LPC_SPI->SPDR;

I see the changes in SPDR whenever i am receiving data
but not when sending the data.

Thanks again for your reply.
Regrads

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