ChibiOS Free Embedded RTOS

so i try explain it,

this is my callback function :

// GPT4 callback.
static void gpt4cb(GPTDriver *gptp) {
(void)gptp;
palSetPad(GPIOB, 7);
osalSysLockFromISR();
gptStartOneShotI(&GPTD3, 1000); /* 0.1 second pulse.*/
osalSysUnlockFromISR();
}
// GPT3 callback.
static void gpt3cb(GPTDriver ...

Yes it isn't enter to callback

Hello,
I am trying to launch a GPT demo on STM32f429zi, using os-less. I make the project's makefile is going through successfully,
initialization of the timers too, but exit from gptStartContinuous function (& GPTD4, 5000) caused the program to stop working correctly.
Someone has similar problem ...