AVR Freaks

Here is an example of using TC0 Channel 0 and TC1 Channel 1.     Based on the ASF GETTING_STARTED E70 XPLAINED example.

In main.c

#define ID_TC0_0 ID_TC0
#define ID_TC0_1 ID_TC1
#define ID_TC0_2 ID_TC2
#define ID_TC1_0 ID_TC3
#define ID_TC1_1 ID_TC4
#define ID_TC1_2 ID_TC5
#define ID_TC2_0 ID_TC6
#define ID_TC2_1 ID_TC7
#define ID_TC2_2 ID_TC8
#define ID_TC3_0 ID_TC9
#define ID_TC3_1 ID_TC10
#define ID_TC3_2 ID_TC11

#define TC0_0_Handler TC0_Handler 
#define TC0_1_Handler TC1_Handler 
#define TC0_2_Handler TC2_Handler
#define TC1_0_Handler TC3_Handler
#define TC1_1_Handler TC4_Handler
#define TC1_2_Handler TC5_Handler
#define TC2_0_Handler TC6_Handler
#define TC2_1_Handler TC7_Handler
#define TC2_2_Handler TC8_Handler
#define TC3_0_Handler TC9_Handler
#define TC3_1_Handler TC10_Handler
#define TC3_2_Handler TC11_Handler 

next add handlers:

// [main_tc0_handler]
#ifndef BOARD_NO_LED_1
void TC0_0_Handler(void)
{
	volatile uint32_t ul_dummy;

	/* Clear status bit to acknowledge interrupt */
	ul_dummy = tc_get_status(TC0, 0);

	/* Avoid compiler warning */
	UNUSED(ul_dummy);

	printf("2 ");
}

void TC1_1_Handler(void)
{
	volatile uint32_t ul_dummy;

	/* Clear status bit to acknowledge interrupt */
	ul_dummy = tc_get_status(TC1, 1);

	/* Avoid compiler warning */
	UNUSED(ul_dummy);

	printf("3 ");
}
// [main_tc0_handler]

Note:  You need to comment out the #define BOARD_NO_LED_1  in conf_board.h

Then configure the timers:

static void configure_tc0_0(void)
{
	uint32_t ul_div;
	uint32_t ul_tcclks;
	uint32_t ul_sysclk = sysclk_get_cpu_hz();

	/* Configure PMC */
	pmc_enable_periph_clk(ID_TC0_0);


	/** Configure TC for a 4Hz frequency and trigger on RC compare. */
	tc_find_mck_divisor(4, ul_sysclk, &ul_div, &ul_tcclks, ul_sysclk);
	tc_init(TC0, 0, ul_tcclks | TC_CMR_CPCTRG);
	tc_write_rc(TC0, 0, (ul_sysclk / ul_div) / 4);

	/* Configure and enable interrupt on RC compare */
	NVIC_EnableIRQ((IRQn_Type) ID_TC0_0);
	tc_enable_interrupt(TC0, 0, TC_IER_CPCS);


	tc_start(TC0, 0);

}
static void configure_tc1_1(void)
{
	uint32_t ul_div;
	uint32_t ul_tcclks;
	uint32_t ul_sysclk = sysclk_get_cpu_hz();

	/* Configure PMC */
	pmc_enable_periph_clk(ID_TC1_1);


	/** Configure TC for a 8Hz frequency and trigger on RC compare. */
	tc_find_mck_divisor(8, ul_sysclk, &ul_div, &ul_tcclks, ul_sysclk);
	tc_init(TC1, 1, ul_tcclks | TC_CMR_CPCTRG);
	tc_write_rc(TC1, 1, (ul_sysclk / ul_div) / 8);

	/* Configure and enable interrupt on RC compare */
	NVIC_EnableIRQ((IRQn_Type) ID_TC1_1);
	tc_enable_interrupt(TC1, 1, TC_IER_CPCS);


	tc_start(TC1, 1);

}

and turn on the timers

	configure_tc0_0();
	configure_tc1_1();