Keil forum How can I use a global variable in the Interrupt routine?

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How can I use a global variable in the Interrupt routine?

Nantian Gumo over 20 years ago

The variable is defined in *.h:

static unsigned char cPwLe[3] = {0};

Its value is changed in the Main():

cPwLe[cCh] = Power_Level(cP[cCh]);  //Here  value is right

Its value is transfered to T0 Interrutpt service routine:

cPower = cPwLe[cCh]; //Here value is  always 0

How can I correct the errors?
Thanks all!