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Posted: Fri Nov 18, 2005 12:05 pm
Yo People,
If you always wondered how you could keep something in RAM which won't always be re-initialize when you start your code...
Well this is an answer !
You just need to declared a special area in your parameter file and the start-up softawre will not initialize this zone.
It's quite neat if you want to keep a count of the number of resets.
But be careful as if you have a Low Voltage Reset or Power On Reset this value might be corrupted or may not be meaningful.
In the PRM file
If you always wondered how you could keep something in RAM which won't always be re-initialize when you start your code...Well this is an answer !
You just need to declared a special area in your parameter file and the start-up softawre will not initialize this zone. It's quite neat if you want to keep a count of the number of resets. But be careful as if you have a Low Voltage Reset or Power On Reset this value might be corrupted or may not be meaningful.In the PRM file
| Code: |
| SECTIONS RESET_COUNTER = NO_INIT 0x1EFF TO 0x1EFF; |
| Code: |
| PLACEMENT NON_INITIALISED INTO EMC_RESET_COUNTER; |
And In the C code
| Code: |
| /* global variables */ #pragma DATA_SEG NON_INITIALISED unsigned char ResetCounter; #pragma DATA_SEG DEFAULT |
Enjoy,
Posted: Fri Nov 18, 2005 4:13 pm
Shouldn't the PLACEMENT be
PLACEMENT
NON_INITIALISED INTO RESET_COUNTER;
instead of
PLACEMENT
NON_INITIALISED INTO EMC_RESET_COUNTER;
Posted: Fri Nov 18, 2005 4:20 pm
PLACEMENT
NON_INITIALISED INTO RESET_COUNTER;
instead of
PLACEMENT
NON_INITIALISED INTO EMC_RESET_COUNTER;
Posted: Fri Nov 18, 2005 4:20 pm
is there an error in your PRM? I see a "EMC_RESET_COUNTER" and a "RESET_COUNTER". Are these supposed to be the same? Also, you don't have "DEFAULT" listed in your PRM, but I know what you mean.
Posted: Mon Nov 21, 2005 8:47 am
Yes it should be without the prefix EMC_ on the second time.
I forgot to remove it when I did my copy/paste from my source code.
I did not paste the rest of the prm file (default...) because the prm file is too big for me to paste it in a post.
(bad copy/paste, bad...)
I forgot to remove it when I did my copy/paste from my source code.
I did not paste the rest of the prm file (default...) because the prm file is too big for me to paste it in a post.
(bad copy/paste, bad...)
