Everything

Usage example (Input pulse interval measuremen)

Measure the interval of the falling edges input to TImn pin.

 

[Waveform example]

 

[GUI setting example]

Timer

Used

TAU0

Used

Channel0

channel 0

Input pulse interval measurement

Input source setting

TI00

TI00 interval range

0.125 (μs) < TI00 < 8.192 (ms)

Enable using noise filter of TI00 pin input signal

Unused

Generates INTTM00when counting is started.

Unused

Input edge setting

Falling edge

End of timer channel0 capture, generate an interrupt (INTTM00)

Used

Priority

Low

Remark         The period of count clock is 1/2 of the minimum value in the eage selected ‘TI00 interval range’. At this GUI setting example, the period of count clock is 0.0625usec.

 

 

[API setting example]

r_main.c

void main(void)

{

       R_MAIN_UserInit();

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

       /* Start TAU0 channel 0 counter */

       R_TAU0_Channel0_Start();

 

       while (1U)

       {

              ;

       }

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

}

 

r_cg_timer_user.c

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

volatile uint32_t g_width = 0UL;

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

 

static void __near r_tau0_channel0_interrupt(void)

{

       if ((TSR00 & _0001_TAU_OVERFLOW_OCCURS) == 1U)    /* overflow occurs */

       {

              g_tau0_ch0_width = (uint32_t)(TDR00 + 1U) + 0x10000U;

       }

       else

       {

              g_tau0_ch0_width = (uint32_t)(TDR00 + 1U);

       }

 

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

       /* Get TAU0 channel 0 input pulse width. Pulse width(usec) = (Period of count clock(usec) * g_width) */

       R_TAU0_Channel0_Get_PulseWidth((uint32_t *)&g_width);

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

}