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TMS320F280039: Global variable defined is not initialized

Ben Qin
Intellectual 2690 points

Part Number: TMS320F280039

Hi Team,

There's an issue from the customer need your help:

I define variable uint16 a=0 under Timer0Intc.C file, and extern it in Timer0Int.h file, extern  uint16 a=0. After the program runs, the variable a is not valued elsewhere, but it will be read in other .c files. Through online observation, it is found that the value of a is not 0, but a random number. I reduced the tasks in the interrupt function and found that a can be initialized to 0. What causes the external global variables not to be initialized?

Thanks & Regards,

Ben