DLOG_4CH_buff1 cannot load from non-primitive location

Jingzhe Wu

Hi,

I am using F28027 Piccollo Launchpad for a motor application. I now wish to observe the data I stored in data log by plotting in the CCS graph tool. However, from the watch window, it says *(DLOG_4CH_buff1) cannot load from non-primitive location. What does this mean? How can I solve this?

Thank you.

Jingzhe

over 12 years ago

0 andreas von kaenel over 12 years ago

Genius 4925 points

Hi,

This message means, that you are trying to display a non primitive variable. What data type did you attach to the DLOG module? is it a struct maybe?

BR Andreas

0 Jingzhe Wu over 12 years ago in reply to andreas von kaenel

Intellectual 720 points

Hi Andeas,

I indeed try to output a structure member to data log. The data type of the structure member is _iq. Before entering data log, it is converted to suit data log data type by (unit16)_IQtoIQ15. I think it is proper data log type. Can't see why it is not a primitive data type.

Thanks.

Jingzhe

0 andreas von kaenel over 12 years ago in reply to Jingzhe Wu

Genius 4925 points

How did you assign the data to the log module? did you just cast the struct member? I would recommend to cast the data into a suitable variable first and then attach this variable to the log module.

Andreas

0 Jingzhe Wu over 12 years ago in reply to andreas von kaenel

Intellectual 720 points

Hi Andreas,

You are right. I just cast the structure member to data log. Probably I should cast the value to a variable and then data log it.

My solution is to create a buffer array myself and store relevant values into array during every interrupt, and it works fine.

Thank you.

Jingzhe

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DLOG_4CH_buff1 cannot load from non-primitive location