Subversion Repositories tv80

  iter = string;

  while (*iter != 0) {

    msg_port = *iter++;

  }

}

char rxbuf[128];

void test_byte (unsigned char pattern) {

  unsigned char status, data;

  // send a byte through the UART

  uart_dm0 = pattern;

  // wait for byte to be received

  do {

    status = uart_lsr;

  } while ((status & 0x01) == 0);

  // fail if status byte indicates anything other

  // than data ready and transmitter empty

  if (status != 0x61) {

    print ("Incorrect status byte\n");

    sim_ctl_port = 0x02;

  }

  // read the sent byte and fail if it's not what we sent

  data = uart_dm0;

  if (data != pattern) {

    print ("Data miscompare\n");

    sim_ctl_port = 0x02;

  }

}

int main ()

{

  //print ("Hello, world!\n");

  int i, rx_count;

  // set divisor to 100

  uart_lcr = 0x8b;

  uart_dm0 = 0x02;

  uart_dm1 = 0x00;

  // line settings:

  // 8 bits, 1 stop bit, even parity

  uart_lcr = 0x0b;

  // turn on internal loopback in UART

  uart_mcr = 0x10;

  test_byte (0x55);

  test_byte (0x1F);

  // turn off loopback and use external loop

  uart_mcr = 0x00;

  test_byte (0xAA);

  test_byte (0xBD);

  // maybe do a checksum here

  sim_ctl_port = 0x01;

  return 0;

}