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void act_dimmer230_pcint_callback(uint8_t id, uint8_t status) //ISR (act_dimmer230_ZC_PCINT_vect)
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void act_dimmer230_pcint_callback(uint8_t id, uint8_t status) //ISR (act_dimmer230_ZC_PCINT_vect)
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{
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{
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    /* only execute if zerocross pin is low (after real zerocross).
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    /* only execute if zerocross pin is low (after real zerocross).
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    Calculate the diff from real zero-cross.
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    Calculate the diff from real zero-cross.
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    */
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    */
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    if (!gpio_get_state(act_dimmer230_ZC_IO))
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    if (!status)
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    {
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    {
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        xcTimeDiff = TCNT1;
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        xcTimeDiff = TCNT1;
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        xcTimeDiff = xcTimeDiff >> 1; //divide by two
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        xcTimeDiff = xcTimeDiff >> 1; //divide by two
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        if (xcTimeDiff > 600) {
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        if (xcTimeDiff > 600) {
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            xcTimeDiff = 600;
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            xcTimeDiff = 600;