Hello, everybody.
I'm trying to plot a 64-bit integer in a CCS 5 Graph during Debug mode. In order to ensure the data align of my array was 64-bit I declarated the variable using a pragma directive as follows:
#pragma DATA_ALIGN(x, 64)
int64_t x[SIZE];
I checked the alignment using the Memory Browser and it worked. Curiously, when I tested the long int type (40 bits long according to the C6000 compiler docs) instead of int64_t, the data were alwas aligned to a 32-bit boundary even though the pragma directive was put with a 64-bit value.
I selected the "64 bit signed integer" option in the Graph window, but the data are not displayed correctly and the plot seem to be "saturated", even when the tested data is in sine wave in a small range between -255 and 255. The Y axis is also out of range. I tested to change the option to "32 bit signed integer" and the new graph showed the expected sinusoid shape with "gaps" corresponding to the empty values of the 64-bit data, but without the sign. In other words, the graph is always possitive.
How can I plot correctly a 64-bit integer array in CCS5? Why does not the CCS5 have an option to plot 64-bit unsigned integers?
Thanks for your help.
Hi,
Regarding the graph tool, I managed to configure the display for 64-bit signed integer variables but, as you said, the Y axis seems off (check the attached screen). It is displaying the values surrounding a 32-bit boundary, although the values in the Memory Browser are full signed 64-bit integers (and I would expect their values to be the same shown in the Expressions view in the upper right corner).
The issue is in the Y axis format conversion, since you can display the complete 64-bit hex values by right-clicking on the graph tool --> select Display Properties --> Axes --> Display format under Y-axis --> set to Hex. This is possibly a bug.
Regarding the saturation effect, I couldn't verify this. However, I noticed that sometimes the graph looked strange and required a reset - simply click on the button with the double red "X" in the graph toolbar followed by a refresh. I also noticed that, if you set the Display Data Size in the Graph Properties to a value larger than 512 the graph does not look correct. I am not sure why this is happening, but it requires further investigation and it is possibly a bug.
Sorry for the trouble; the use of 64-bit variables is so uncommon that it is possible these issues were not caught previously.
Could you send the first part of your post to the compiler forum? They will have a better idea on how the data alignment works.
Regards,
Rafael
Yesterday I filed the bugs SDSCM00043761 (trouble with Display Data Size larger than 512) and SDSCM00043762 (Y-axis formatting issue). You can check their status at the link SDOCM shown in my signature below.