Renesas Single-Chip Microcomputer M38C89T-ADF Manual de usuario descargar pdf (Pagina 82)

Rev.1.00 May 22 2012

REJ09B0566

4-62

3BLibrary Reference

4.2.6 37BDMA Controller R_DMAC_Control

3) R_DMAC_Control

Synopsis

Control the DMA controller.

Prototype bool R_DMAC_Control (

uint8_t data1, // Channel number

uint8_t data2, // Control options

uint32_t data3, // Source reload address

uint32_t data4, // Destination reload address

uint32_t data5

// Transfer byte reload count

);

Description

Change the state of a DMA controller channel.

[data1]

Channel selection.

If multiple selections are required, use “|” to separate each selection.

PDL_DMAC_0

PDL_DMAC_1

PDL_DMAC_2

PDL_DMAC_3

…

PDL_DMAC_15

or PDL_DMAC_ALL

The channel to be controlled.

[data2]

Control the channel operation.

If multiple selections are required, use “|” to separate each selection.

• Enable / suspend control

PDL_DMAC_ENABLE or

PDL_DMAC_SUSPEND or

Enable / re-enable or suspend DMA transfers on the selected

channel(s).

• Software trigger control

PDL_DMAC_START Start a DMA transfer.

• Transfer end detection flag control

PDL_DMAC_CLEAR_TEDF

Clear the flag. This flag is cleared automatically if a callback function

is enabled.

• The reload registers to be modified.

PDL_DMAC_SOURCE Update the Transfer Source Address reload register (DMRSA).

PDL_DMAC_DESTINATION Update the Transfer Destination Address reload register (DMRDA).

PDL_DMAC_BYTES Update the Byte Count reload register (DMRBC).

[data3]

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

[data4]

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

[data5]

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

Return value

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

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