In the setting of the timer counter interrupt is not included.

Hardware Arduino Due
1

Prompt please, what settings timer-counter in my program is not so. Settings sketched, maximum identical, with musical examples Arduino. No compilation of comments, but on-board Arduino Due not included interruption. In the program reads the input pulse duration for any differential input pulse.

volatile static int32_t counter1; /* ?????????? - ??????? ????????? ???????? 1 */

// ????????? ??????-??????? 0 ? ??? ????? 1
#define WORK_TIMER TC0
#define INPUT_CHNL 1
#define INPUT_IRQ TC1_IRQn

static Tc chTC = WORK_TIMER;
static uint32_t chNo = INPUT_CHNL;
static uint32_t in_pin; / ?????? A7 ??? ??????? ???? PA2 in_pin - 85 ????? */

// ??????????? 1 ?????: ???????????? ???????? ??????? 32, ??? ????????? ?????? ???????? ???????? ?????? ???????? ? ??????? ?
void set_timer1 (uint32_t ulPin) {
pmc_set_writeprotect(false);
pmc_enable_periph_clk((uint32_t)INPUT_IRQ);
TC_Configure(chTC, chNo,
TC_CMR_TCCLKS_TIMER_CLOCK3 |
TC_CMR_LDRA_EDGE);
chTC->TC_CHANNEL[chNo].TC_IER=TC_IER_LDRAS;
chTC->TC_CHANNEL[chNo].TC_IDR=~TC_IER_LDRAS;
NVIC_EnableIRQ(INPUT_IRQ);
in_pin = ulPin;
// ????????? A7 ??? ??????? ???? PA2 ?? ????
pinMode (in_pin, INPUT);
}

void setup() {
// put your setup code here, to run once:
counter1 = 0;
Serial.begin(9600);
set_timer1 (A7);
}

void loop() {
// put your main code here, to run repeatedly:
if (counter1 != 0) {
Serial.println(counter1);
counter1 = 0;
}
}

void TC1_Handler (void) {
TC_GetStatus(TC0, 1);
TC_Stop(chTC, chNo);
counter1 = TC0->TC_CHANNEL[1].TC_RA;
TC_Start(chTC, chNo);
}