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Fujitsu MB91460 SERIES Nota de aplicación

Main.c

/* THIS SAMPLE CODE IS PROVIDED AS IS AND IS SUBJECT TO ALTERATIONS. FUJITSU */

/* MICROELECTRONICS ACCEPTS NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR */

/* ELIGIBILITY FOR ANY PURPOSES.

/*---------------------------------------------------------------------------*/

#define

COUNT 16

#define

MEM_START 0x20000000

int

src_buff[COUNT] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16};

#pragma

segment DATA=_EXT_RAM, attr=DATA

int

dst_buff[COUNT];

#pragma

segment DATA

void

Setup_DMA0(void)

{

PFR13_D0 = 1;

PFR13_D1 = 1;

DMACR_DMAE = 1;

DMACA0_DENB = 0;

DMASA0 = (IO_LWORD)&src_buff;

DMADA0 = (IO_LWORD)&dst_buff;

DMACA0_IS = 0xF;

DMACB0_WS1 = 1; DMACB0_WS0 = 0;

DMACB0_EDIE = 1;

DMACB0_SADM = 0;

DMACB0_DADM = 0;

DMACB0_SASZ = 0x04;

DMACB0_DASZ = 0x04;

DMACB0_DTCR = 0 ;

DMACA0_BLK = 4;

DMACA0_DTC = 4;

DMACB0_MD1 = 0;

DMACB0_MD0 = 0;

DMACA0_DENB = 1;

}

void

Setup_Leds(void)

{

DDR16 = 0xff;

PFR16 = 0x00;

PDR16 = 0x00;

}

MCU-AN-300059-E-V11

DIRECT MEMORY ACCESS

Chapter 3 DMAC Examples

// External DMA-pin low level or falling edge

// port as output

// use GPIO function

// all LEDs off

- 22 -

// Enable DREQ0

// Enable DACK0

// Enable all DMAC channels

// Disable DMAC channel 0

// Source Start Address

// Destination Start Address

// Word-width

// IRQ when transfer finished

// Source Address increment

// Destination Address increment

// Source Address increment by 4

// destination Address increment by 4

// Reload DTC disable

// Block_Value 4 words

// DTC set

// Block Mode

// Enable DMAC channel 0