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non-executable code (invalid break points)

Eric Yeow

The following codes are for initializing the LCD display and directly copied from my program, but when those codes under debugging using software simulator, why the line 6 & line 12 always are non-executable code (invalid break points)? What are the possible reasons?

void DispInit ( unsigned char maxrows, unsigned char maxcols)
{
1. DispInitPort();
2. DispMaxRows = maxrows;
3. DispMaxCols = maxcols;
4. OS_Delay(100);
5. DispSel(DISP_SEL_CMD_REG);
6. DispDataWr(0x30);
7. OS_Delay (2);

8. DispSel(DISP_SEL_CMD_REG);
9. DispDataWr(0x30);
10. OS_Delay(150);


11. DispSel(DISP_SEL_CMD_REG);
12. DispDataWr(0x30);
13. OS_Delay(2);
14. DispSel(DISP_SEL_CMD_REG);
15. DispDataWr(0x08);
16. OS_Delay(2);
17. DispSel(DISP_SEL_CMD_REG);
18. DispDataWr(0x08);
19. OS_Delay(2);
}

Please help me, it is time consuming & really killing

Parents
  • 0

    Please remember to use the 'pre' and '/pre' tags around code, like is says in the instructions.

    Note that your code contains the sequence

    DispDataWr(0x30);
OS_Delay (2);
    twice.
    It may well be that the optimiser is combining these.

    What optimisation setting are you using?

Reply
  • 0

    Please remember to use the 'pre' and '/pre' tags around code, like is says in the instructions.

    Note that your code contains the sequence

    DispDataWr(0x30);
OS_Delay (2);
    twice.
    It may well be that the optimiser is combining these.

    What optimisation setting are you using?

Children
  • 0 in reply to Andy Neil

    Thank you Walt Conley and Andy Neil .
    You are absolutely right. After I have changed the function DispDataWr
    from:
    static void DispDataWr(unsigned char val)
    to:
    static void DispDataWr(volatile unsigned char val),
    problems seem have been resolved.

    By the way the optimization setting I am using is level 8 ( reuse common entry code).