problem with ac dimmer circuit with nRF51822

[OnureaN]

hi,

i tried to make a ac dimmer circuit controlled with dc

i use nrf51822

this is my dimmer circuit

aaand this one is zero crossing detector

finally this is my mbed code;

DigitalOut trigger(p15);

DigitalIn zero(p14);

int main()

{

    while(1)  

    {

        if (zero==1) 

        {

            wait_us (5000);  
                
            trigger = 1;      
             
            wait_us (100);  

            trigger = 0;     

        } 

    }

}

i just want to dim my light %50, but it always blinking.

can anyone help me and tell me what is my mistake?

[OnureaN]

include "mbed.h"

InterruptIn zero(p5);

DigitalOut trigger(p11);

Timeout dim;

void event()

{

    trigger = 1;

    wait_ms (1);

    trigger = 0;

}

void dimmer()

{

    dim.attach(&event,0.005);

}

int main()

{

    //zero.mode(PullDown);

    while (1)

    {

        zero.rise(&dimmer);

    }

}

this code solved my problem.