Usage example (Phase counting mode)

A phase difference between external input signals from two pins TRGCLKA and TRGCLKB is detected and the TRG register is incremented/decremented.

Count the number of TRG register overflow and underflow.

[Waveform example]

[GUI setting example]

TimerRG			Used
	TMRG		Used
		Functions	Phase counting mode
		Initial count	0
		Counter clear	Clear disabled
		CNTEN0	Used
		CNTEN1	Used
		CNTEN2	Used
		CNTEN3	Used
		CNTEN4	Used
		CNTEN5	Used
		CNTEN6	Used
		CNTEN7	Used
		Enable TRG overflow interrupt	Used
		Enable TRG under flowinterrupt	Used
		INTTRG priority	Low/ level3 (low priority level)

[API setting example]

r_cg_main.c

void main(void)

{

R_MAIN_UserInit();

/* Start user code. Do not edit comment generated here */

/* Start the TMRG module operation */

R_TMRG0_Start();

while (1U)

{

;

}

/* End user code. Do not edit comment generated here */

}

r_cg_tmrg_user.c

/* Start user code for global. Do not edit comment generated here */

volatile uint8_t inttrg_over_cnt = 0U;

volatile uint8_t inttrg_under_cnt = 0U;

/* End user code. Do not edit comment generated here */

static void __near r_tmrg0_interrupt(void)

{

/* Start user code. Do not edit comment generated here */

uint8_t temp_trg = 0U;

/* === Count number of overflow or under flow === */

/* Mask TRGSR resister to check overflow or underflow occurred */

temp_trg = TRGSR & 0x0CU;

if (temp_trg == 0x08U)

{

/* --- Count up number of overflow --- */

inttrg_over_cnt++;

/* --- Clear overflow Flag --- */

TRGSR &= 0x07U;

}

else

{

/* --- Count up number of underflow --- */

inttrg_under_cnt++;

/* --- Clear under flow Flag --- */

TRGSR &= 0x0BU;

}

/* End user code. Do not edit comment generated here */

}