Renesas Single-Chip Microcomputer M38C89T-ADF Uživatelský manuál stáhnout pdf (Strana 80)

Rev.1.00 May 22 2012

REJ09B0566

4-60

3BLibrary Reference

4.2.6 37BDMA Controller R_DMAC_Create

Description (2/3) [data5]

The start address of destination

[data6]

The number of bytes to be transferred.

[data7]

The reload address value of source. This value is ignored if the reload function is disabled.

[data8]

The reload address value of destination. This value is ignored if the reload function is disabled.

[data9]

The reload value for number of bytes. This value is ignored if the reload function is disabled.

[func]

The function to be called when a DMA transfer completes. Specify PDL_NO_FUNC if not required.

[data10]

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

Return value

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

Category

DMA controller

Reference

R_DMAC_Destroy, R_DMAC_Control, R_DMAC_GetStatus

Remarks • If another peripheral will be used to trigger a DMA transfer, call this function before calling the Create

function for the peripheral.

• A callback function is executed by the interrupt processing function. This means that no other interrupt

can be processed until the callback function has completed.

Program example

/* PDL definitions */

#include “r_pdl_dmac.h”

/* PDL device-specific definitions */

#include “r_pdl_definitions.h”

void func(void)

{

/* Configure DMA channel 2 */

R_DMAC_Create(

PDL_DMAC_SOURCE_ADDRESS_PLUS,

PDL_DMAC_REQUEST_IRQ0,

0x0000AA00,

0x0000BB00,

10,

PDL_NO_FUNC,

);

}

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