Hi,
thanks for all answers. I found the problem to be the degauss coil from my CRT,
inserting signals via the connected jtag cable (serial rs232 als was connected
at the same time to same pc).
I couldn't figure out what state the msp went in, it sometimes just locked up.
Also there was a another constant "rebooting" state. I guess that compares to
what has been described before by other people, when using battery clips on the
f149.
Everything runs fine now.
Greetz,
Georg
Georg Ritter wrote:
Hello,
following the description of NMIs (chapter 2.2.1 in msp430x1xx userguide
) I want to implement an NMI handler.
I use:
interrupt (NMI_VECTOR) INT_NMI(void) // 0xFFFC
{
if ( (IFG1 & NMIIFG) != 0) // NMIIFG NMI
{
IFG1 &= ~NMIIFG;
RS232printf( "NMIIFG\r\n");
}
else if ( (IFG1 & OFIFG) != 0) // OFIFG osc faul
{
IFG1 &= ~OFIFG;
RS232printf( "osc failed\r\n");
}
else if ( (IFG1 & ACCVIFG) != 0) // ACCVIFG flash mem access violation
{
IFG1 &= ~ACCVIFG;
RS232printf( "flash mem access violation\r\n");
}
else
{
RS232printf( "don't know what caused this int in NMI \r\n
IFG1=%u\r\n",(unsigned int)IFG1);
}
IE1 |= ( ACCVIE | NMIIE | OFIE | WDTIE );
}
the doc Note says (at the bottom of chapter 2.2.2):
Note: Enabling NMI Interrupts with ACCVIE, NMIIE, and OFIE The ACCVIE,
NMIIE, and OFIE enable bits should not be set inside of an NMI interrupt
service routine, unless they are set by the last instruction of the
routine before the RETI instruction. Otherwise, nested NMI interrupts
may occur, causing stack overflow and unpredictable operation.
At the moment it generates:
How could I accomplish that from within C? is it possible to get the
...
bis.b #llo(51), &0x0000
/* epilogue: frame size=0 */
pop r12
pop r13
pop r14
pop r15
reti
The reason for beeing interested is, that my app seems to run for
several hours and then the f149 reboots and I don't know why. Stack
probably but how would I attack that and why could the stack overflow
from a C program (no dyn. mem allocation). Nested ints perhaps?
greetings,
Georg
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