Renesas Single-Chip Microcomputer M38C89T-ADF Manual de usuario descargar pdf (Pagina 128)

5-12

Rev.1.00 May 22 2012

REJ09B0566

4BUsage Examples

5.6 26BCompare Match Timer

5.6. Compare Match

Figure 5-7 shows an example of Compare Match Timer usage. One channel is used to generate interrupts at regular intervals.

/* PDL functions */

#include "r_pdl_cpg_library_SH7267.h"

#include "r_pdl_pfc_library_SH7267.h"

#include "r_pdl_io_port_library_SH7267.h"

#include "r_pdl_cmt_library_SH7267.h"

/* PDL device-specific definitions */

#include "r_pdl_definitions.h"

void CMT_handler(void);

void CMT_Test(void)

{

uint8_t Flags;

uint16_t Counter;

/* Modify the MCU clocks */

R_CPG_Set(18E6, 144E6, 36E6, PDL_CPG_CK_2, PDL_CPG_OUT_CK_01);

/* Setup the LED1 */

R_PFC_Modify(PDL_PJCR1, PDL_PFC_AND, 0xF0FF);

R_IO_PORT_Set(PDL_IO_PORT_J_6, PDL_IO_PORT_OUTPUT, 0);

/* turn off the LED */

_check_Wr_Pin_H(PDL_IO_PORT_J_6,PDL_IO_PORT_HIGH);

/* Create a CMT timer with 1 us second period */

R_CMT_Create(0,PDL_CMT_PERIOD,1,PDL_NA,2);

/* turn on the LED */

_check_Wr_Pin_H(PDL_IO_PORT_J_6,PDL_IO_PORT_LOW);

R_CMT_Create(0, PDL_CMT_FREQUENCY, 100, CMT_handler, 7);

R_CMT_Control(0, PDL_CMT_START, 10E3);

/* turn on the LED */

_check_Wr_Pin_H(PDL_IO_PORT_J_6,PDL_IO_PORT_LOW);

R_CMT_Create(0, PDL_CMT_FREQUENCY, 200, CMT_handler, 7);

R_CMT_Control(0, PDL_CMT_START, 0x55AA);

R_CMT_Read(2, &Flags, &Counter);

R_CMT_Destroy(0);

while(1);

}

void CMT_handler(void)

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