• State Not Answered
  • Locked Locked
  • Replies 8 replies
  • Subscribers 21 subscribers
  • Views 1611 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

Why some functions got WARNING L15, while others not!

Ding Curie

Hi,
I have several functions called in T0 isr. The outline of call tree like this:

void T0_isr() interrupt 1 {
    getkey();
}

void getkey() {
    char c;
    c = filterGetKeyCode();
}

char filterGetKeyCode() {
    char c;
    c = getKeyCode();
    return c;
}

char getKeyCode() {
    char c;
    char cd;
    // c be assigned somehow
    cd = encodeFlex(c);
    c = decode(cd);
    return c;
}

char encodeFlex(char c) {
    return encode(c);
}

char encode(char);

char decode(char);
Now linker reports (simplified):
Warning 15: multiple call to segment
segment: getKeyCode
caller1: T0_isr
caller2: c_c51stratup

Warning 15: multiple call to segment
segment: encodeFlex
caller1: T0_isr
caller2: c_c51startup

My question is: why getKeyCode and encodeFlex incur warnings, while others, like decode, passed by linker.
When I disoverlay getKeyCode, and declare encodeFlex with reentrant, the warnings all disappear. But I still worry about other functions called in isr. Is it safe now?

Thanks in advance.

d.curie

Parents
  • 0 in reply to Drew Davis

    "The map file shows you the call tree for the program (one level at a time, at any rate)."

    The uVision Code Browser shows you the full call tree.
    It can also show its converse - the Caller Tree.

    So, just take a look at the Caller Tree (or "Caller Graph") for those functions...

Reply
  • 0 in reply to Drew Davis

    "The map file shows you the call tree for the program (one level at a time, at any rate)."

    The uVision Code Browser shows you the full call tree.
    It can also show its converse - the Caller Tree.

    So, just take a look at the Caller Tree (or "Caller Graph") for those functions...

Children