Hi,
I´m using a F28335 developement kit and CCS 5.4 for my bachelor thesis, but the controller have a runtime behavior that I absolutly cannot understand and makes me impossible to work with. I hope someone could help.
i´ve wrote my own code and have to decide in the debug mode that the controller do things that absolutly transgress against any programmers logic. At this really simple code lines the controller did following.
******************************************
int count;
int done;
*****************************************
If(count>=20)
{
done=1;
}
********************************
I stepped me step by step in the single step debug mode through the program and looked in the watch window and see that the integer count has the value 0. The controller checked the if condition and go into the brackets and set done=1; . I can´t understand why the controller ignores the condition and set the variable. But it´s not a constant failure. This and Some other if conditions with more complex conditions work sometimes right and sometimes not.
First i thought that I´ve made mistakes at the initialisation and configuration of the controller and so i´ve studied the students Labs for this controller. I´ve took the Lab for the interrupt system und followed the instuctions step by step for creating a CCS project and so on. But here, where i nothing did anything self, i found other mysterious behavior too. When the controller goes into the interrupt routine, the line to reset the acknowledge bit at the end of the routine doesn´t work at first time. The controller work the line but the bit wasn´t set. And so the interrupt routine run throught many times. I´ve implement a counter to see how many times the controller takes, to set the bit and reset the acknowledge. I decide that it is not constantly. Sometimes it takes 2 cycles , sometimes 4. befor the controllers set the bit and reset the interrupt acknowledge to work the normal code.
At other modules there are strange failures too. Sometimes the ADC works correctly and sometimes it shows the ADC value 156 independently from the input voltage.
Another thinking was, that the controller was broken. But i tested a second controller which was bought at the same delivery. And this one shows also strange behavior. Many strange things the controller do, aren´t constantly. For me it looks really arbitrarily and i can´t explain myself the hidden logic behind. I´ve no idea what kind of problems exist. But with so massiv failured runtime behavior I cannot work with the device which I immediatly need to finish my studies.
I hope that someone could help me, or had the same problems like me and know more about it.
best regards,
Nils Gang
