Renesas Single-Chip Microcomputer M38C89T-ADF Bedienungsanleitung PDF herunterladen (Seite 95)

Rev.1.00 May 22 2012

REJ09B0566

4-75

3BLibrary Reference

R_MTU_CreateChannel

4.2.7 Multi Function Timer

4.2.8. Compare Match Timer

1) R_CMT_Create

Synopsis

Configure a CMT channel.

Prototype bool R_CMT_Create(

uint8_t data1, // Timer channel selection

uint16_t data2, // Configuration selection

void * data3, // Period, frequency or register data

void * func, // Callback function

uint8_t data4

// Interrupt priority level

);

Description

Set up a Compare Match Timer channel and start the timer.

[data1]

The channel number n (where n = 0 or 1).

[data2]

Configure the timer. To set multiple options at the same time, use “|” to separate each value.

The default settings are shown in bold.

• Clock calculation

PDL_CMT_PERIOD or

PDL_CMT_FREQUENCY or

PDL_CMT_PCLK_DIV_8 or

PDL_CMT_PCLK_DIV_32 or

PDL_CMT_PCLK_DIV_128 or

PDL_CMT_PCLK_DIV_512

The parameter data3 will specify the timer period.

The counter clock source and compare match value will be calculated

by this function.

The parameter data3 will specify the timer frequency.

The counter clock source and compare match value will be calculated

by this function.

Select the internal clock signal PCLK ÷ 8, 32, 128 or 512 as the

counter clock source.

The parameter data3 will be the register CMCOR value.

[data3]

The data to be used for the register value calculations.

Data use Parameter type

The timer period in seconds or float

The timer frequency in Hz or float

The value to be put in register CMCOR uint16_t

[func]

The function to be called at the periodic interval. Specify PDL_NA if not required.

[data4]

The interrupt priority level. Select between 0 (interrupt disabled) and 15 (highest priority).

Return value

True if all parameters are valid and exclusive; otherwise false.

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