atiny1616 : impossible to change TCB0.CNT value

[maulionc]

Hello,
i want to use a timeout interrupt.
on my interrupt loop i want to change the TCB0.CNT value but not considered
register TCB0.CNT stay on the first value, impossible to change it on the interrupt loop.

my code below :

Charles

ISR(TCB0_INT_vect)
{

Servo_Ports_LOW;//all servo ports low
//code for servo.
cur_chan_numb++;//next servo
if(cur_chan_numb < chanel_number){
//Serial.println(ppm_data[0]);
total_servo_time +=ppm_data[cur_chan_numb]*scale;
TCB0.CNT=ppm_data[cur_chan_numb]*scale;
//Serial.print("LOW");

void setup() {

/*configure timer TCB1 for PWM */
cli();
TCB0.CTRLA= TCB_ENABLE_bm;
TCB0.CNT=0;
TCB0.CTRLB=0; // periodic interrupt mode
//TCB0.CTRLB = TCB_CNTMODE_FRQPW_gc;
//TCB1.CTRLB = TCB_CNTMODE_TIMEOUT_gc;

TCB0.CCMP = 50*2; //
TCB0.INTCTRL=TCB_CAPT_bm;
TCB0.CTRLA= TCB_CLKSEL_CLKDIV1_gc | TCB_ENABLE_bm;

sei();