Interrupt received value not updating automatically

Hello,

I am working with serial communication interrupt in LPC1768. In that I am receiving a three parameter data in the form of string as X:2341Y:114Z:75 via serial interrupt.

After receiving I am splitting this string and storing 2341 in array1[],114 in array2[] and 75 in array3[] and converting into integer and using in the main function as follows.

int main(){
....
....
....
while(1){
cut_count = (((int)(cut_preset_value[0]-0x30)*1000)+((int)(cut_preset_value[1]-0x30)*100)+((int)(cut_preset_value[2]-0x30)*10)+((int)(cut_preset_value[3]-0x30)));

          duty_count = (((int)(duty_cycle_value[0]-0x30)*10)+((int)(duty_cycle_value[1]-0x30)));

          TOTAL_TIME = ceil((ONE_MIN_IN_MSEC)/(cut_count));     //ceil func. is to round off the value

          dividend_value = ((TOTAL_TIME)*(duty_count));

          ON_TIME_VALUE = ceil(dividend_value/PERCENT_DIVISOR_VALUE);   //ceil func. is to round off the value

          OFF_TIME_VALUE = ceil(((TOTAL_TIME)-(ON_TIME_VALUE)));         //ceil func. is to round off the value


} }

Note:Here cut_preset_value[],suction_preset_value[] and duty_cycle_value[] are the three globally defined arrays for storing values.

Within the while loop the arrays are not updating without board reset.

kindly provide some solution for this.
Thank you.

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