Fujitsu MB91460 SERIES Catatan Aplikasi - Halaman 26

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Halaman Cetak

void

Init_LED (void)

{

DDR16 = 0xff;

PFR16 = 0x00;

PDR16 = 0x00;

}

void

main(void)

{

__EI();

__set_il(31);

InitIrqLevels();

PORTEN = 0x3;

Init_LED();

Init_DMAC();

Init_UART2();

while(1)

{

HWWD_CL = 0;

}

__interrupt

void

DMAIRQHandler (void)

{

if(DMACB0_DSS1 == 1 && DMACB0_DSS0 == 1)

{

DMACB0_DSS = 0;

PDR16 = 0xff;

}

Vectors.c

Please note, that the corresponding interrupt vector and level has to be defined in the

vectors.c module of our standard template project.

/* 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.

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

void

InitIrqLevels(void)

{

. . .

ICR63 = 20;

. . .

}

__interrupt

void

DMAIRQHandler (void);

. . .

#pragma intvect DMAIRQHandler

. . .

MCU-AN-300059-E-V11

DIRECT MEMORY ACCESS

Chapter 3 DMAC Examples

// port as output

// use GPIO function

// all LEDs off

// enable interrupts

// allow all levels

// init interrupts

// enable I/O Ports

// This feature is not supported by MB91V460A

// For all other devices the I/O Ports must be enabled

// Initialize led port

// Initialize DMAC

// Initialize UART2

// endless loop

// DMA Controller

// Main/Sub OSC stability wait

142

// Normal End

// clear DMA channel status

// Glow all LEDs connected at Port16

// Prototype

// DMA Controller

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