• State Not Answered
  • Locked Locked
  • Replies 1 reply
  • Subscribers 21 subscribers
  • Views 1196 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

putchar works, printf not

Nora

Hello,

I'm programming a OS for C167 and my problem is that the C167 does write with putchar, but when I want to write with printf it only prints the first character of the string.

For example:

void initSerial(void) {
    P3  |= 0x0400;
    DP3 |= 0x0400;
    DP3 &= 0xF7FF;
    S0TIC = 0x80;
    S0RIC = 0x00;
    S0BG = 0x40;
    S0CON = 0x8011;
}

void main (void) {
  int i;

  initSerial();

  while(1) {
    for(i = 0; i < 20; i++) {
      putchar('c');
    }
    for(i = 0; i < 20; i++) {
      printf("s");
    }
  }
}

This code prints 20x 'c' and then a "s" but then nothing, but cursor is still running like the board wants to write space characters.

If I change the Memory Model to "Small" it works, but I want the TinyModel. Userstacksize is 0x1000 which must be enough.

Where is the problem in this code?

Best regards,
Norbert Rastl