ccs 3.3 & 4.1 same graph problem

Thiyagarajan . S

hi,

am using f2812 kit with ccs 3.3 & 4.1, i have generated the sine wave program by sine calculation. now i have a sine valus in array , to see a sine wave, am using the followings steps,

To see an array in a graph, go to "View Graph Time/Frequency...".
i. Start Address: Name of the array (to be plotted).
ii. Acquisition Buffer Size: Size of the array.
iii. Display Data Size: Size of the data to be displayed on the graph.
iv. DSP Data Type: Type of the array (integer or float).
v. Sampling Rate: Sampling rate of the signal in the array

the ccs showing the following error :

START ADDRESS : CANNOT EVALUATE ADDRESS/EXPRESSION...

to over come this what i have to do ??????// i want to see a sine wave in graph in both ccs 3.3 & 4.1.....

anyone can help me.........,

over 13 years ago

0 AartiG over 13 years ago

TI__Guru**** 173310 points

How are you specifying the start address? Simply by the symbol name or &symbolname? There may be a difference in the way CCS 3.3 and CCS4 expects the name to be specified. Try both and let us know if it helps.

0 Thiyagarajan . S over 13 years ago in reply to AartiG

Expert 2570 points

hi,

The following is my program:

void main()

{

short value;.......

...........

........

value = sin(teta)*1024;
printf("\t sin %lf Value is : %d",teta,value);

}

this sinewave program i have generated in ccsv4 for c5505 kit. at the starting address of graph properties i put ' value '. but it showing error as:

START ADDRESS : CANNOT EVALUATE ADDRESS/EXPRESSION.....

to see sine wave what i have to do , please soon reply and help me....,

0 AartiG over 13 years ago in reply to Thiyagarajan . S

TI__Guru**** 173310 points

Make the variable "value" global instead of local and make sure that you are compiling with symbolic debug information turned on (-g compile option). Also would be best to not turn on optimization to ensure that the variable is not optimized out by the compiler tools.

0 Thiyagarajan . S over 13 years ago in reply to AartiG

Expert 2570 points

Hi ArtiG,

yes u are correct , just i changed my local variable to global variable, then the graph accepts he variale name,

ok , Are you aware of SPACE VECTOR PWM ?

Thanks a lot.........

0 AartiG over 13 years ago in reply to Thiyagarajan . S

TI__Guru**** 173310 points

Glad the issue with the variable name is resolved.

Thiyagarajan . S said:
Are you aware of SPACE VECTOR PWM ?

The C2000 device forum would be the best place to ask questions related to PWM.

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ccs 3.3 & 4.1 same graph problem