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안녕하세요 L입니다.
오늘은 ARM7 의 AIC를 이용해 Interrupt 를 구현해 보았습니다.
★ Advanced Interrupt Controller (AIC)
※ spec :: 183p
ㆍ8개의 Interrupt(중단하다, 끼어들다) 를 운선순위에 따라 개별적으로
32개의 pin을 Interrupt 제어할 수 있다.
ㆍ IRQ : Interrupt 가 들어왔다.
ㆍ FIQ : 패스트 인트럽트
ㆍ각 핀마다 레벨을 다르게 줄수 있다.
ㆍ0V, 3V 전압에 민감하게 만들거나 모서리에 민감하게 프로그래밍 할 수 있다.
[ cstartup .S ]
ㆍ reset value (ARM) :: Initial value (AVR) ::
ㆍ PC (ARM) :: IP(인텔) :: 명령의 주소
ㆍATMEL ARM에서는 reset 주소값은 0번지부터 시작한다.
ㆍldr : 대입 연산자
ㆍb : 점프
ㆍPC : 프로그램 카운터
[ swi_vector ]
ㆍ소프트웨억 발생시키는 Interrupt.
[ pabt_vector ]
※ spec :: 16p
ㆍ명령어 수행 단계
ㆍARM 의 속도를 빠르게 하기위해 3단 pipe가 존재
[ IRQ ]
ㆍ하드웨어에서 발생하는 Interrupt.
[ FIQ ]
ㆍ점프하지않고 현재위치에서 코드를 처리한다.
ㆍ가장 먼저 실행되어야 할부분을 fiq 바로 아래 위치시키면 빠르게 처리할 수 있다.
ㆍ라벨로 점프하여 처리되기 때문에 주소값이 밀릴 걱정은 없다.
※ spec :: 183p
ㆍEmbedded Peripheral : FIQ, IRQ 에 연결 되어 있다.
ㆍFIQ, IRQ 핀 외의 것은 외부장치를 나타낸다.
ㆍWake UP : 슬립모드
ㆍFIQ, IRQ : PIO 컨트롤을 거치므로 PIO를 세팅해야 사용가능하다.
[ PIO 세팅 ]
ㆍInterrupt가 처리된후 지워지지 않음으로 아무 값이나 넣어 함수종료 부분에 위치 시킨다.
ㆍVECTOR : 주소
ㆍAIC 함수 VECTOR 을 받는다.
ㆍ본 사용자는 우선순위 레벨을 0~7 에서 0으로 사용 하였다.
ㆍ외부에서 신호를 받음으로 External Interrupt 사용
ㆍ즉 하강 엣지는 1로 주고 우선순위는 0으로 줌
ㆍGlitch Input Fliter 활성
ㆍPIOA Interrupt 를 set 한다.
ㆍPIO_ISR : 위와 같이 정의하면 한번 read 된다.
ㆍ위 소스는 글리치 필터와 같이 잡음제거 역할을 하게 된다.
ㆍ바로아래 딜레이를 걸어 잡음을 확실하게 제거한다.
※ spec :: 187p
ㆍ위의 회로도에따라 필요한 레지스터를 활성화 시키고 코드를 작성한다.
Ex) AIC 인터럽트 발생 실습
[ 헤더 파일 ]
////////////////////////////////////////////////////////////////////////
/////////// [ 2012. 07. 18.By.L ] //////////
/////////// REF :: 6175G.ATARM.22- Nov- 60 :: SPEC //////////
////////////////////////////////////////////////////////////////////////
#ifndef __ARM_H__
#define __ARM_H__
/*=========================================================================
[ Parallel Input Output Controller ( PIO > : SPEC :: P.88 ]================
===========================================================================*/
#define PIO_PER (*((volatile unsigned int *)0xFFFFF400))
#define PIO_PDR (*((volatile unsigned int *)0xFFFFF404))
#define PIO_PSR (*((volatile unsigned int *)0xFFFFF408))
//<Reserved>===================================================
#define PIO_OER (*((volatile unsigned int *)0xFFFFF410))
#define PIO_ODR (*((volatile unsigned int *)0xFFFFF414))
#define PIO_OSR (*((volatile unsigned int *)0xFFFFF418))//<Reserved>===================================================
#define PIO_IFER (*((volatile unsigned int *)0xFFFFF420))
#define PIO_IFDR (*((volatile unsigned int *)0xFFFFF424))
#define PIO_IFSR (*((volatile unsigned int *)0xFFFFF428))
//<Reserved>===================================================
#define PIO_SODR (*((volatile unsigned int *)0xFFFFF430))#define PIO_CODR (*((volatile unsigned int *)0xFFFFF434))
#define PIO_ODSR (*((volatile unsigned int *)0xFFFFF438))
#define PIO_PDSR (*((volatile unsigned int *)0xFFFFF43C))
#define PIO_IER (*((volatile unsigned int *)0xFFFFF440))
#define PIO_IDR (*((volatile unsigned int *)0xFFFFF444))
#define PIO_IMR (*((volatile unsigned int *)0xFFFFF448))
#define PIO_ISR (*((volatile unsigned int *)0xFFFFF44C))
#define PIO_MDER (*((volatile unsigned int *)0xFFFFF450))
#define PIO_MDDR (*((volatile unsigned int *)0xFFFFF454))
#define PIO_MDSR (*((volatile unsigned int *)0xFFFFF458))
//<Reserved>===================================================
#define PIO_PUDR (*((volatile unsigned int *)0xFFFFF460))
#define PIO_PUER (*((volatile unsigned int *)0xFFFFF464))
#define PIO_PUSR (*((volatile unsigned int *)0xFFFFF468))
//<Reserved>===================================================
#define PIO_ASR (*((volatile unsigned int *)0xFFFFF470))
#define PIO_BSR (*((volatile unsigned int *)0xFFFFF474))
#define PIO_ABSR (*((volatile unsigned int *)0xFFFFF478))
//<Reserved>===================================================
#define PIO_OWER (*((volatile unsigned int *)0xFFFFF4A0))
#define PIO_OWDR (*((volatile unsigned int *)0xFFFFF4A4))
#define PIO_OWSR (*((volatile unsigned int *)0xFFFFF4A8))
/*=========================================================================
[ Power Management Controller ( PMC ) User Interface : SPEC :: P.222 ]=====
==========================================================================*/
#define PMC_PCER (*((volatile unsigned int *)0xFFFFFC10))
#define PMC_PCDR (*((volatile unsigned int *)0xFFFFFC14))
#define PMC_PCSR (*((volatile unsigned int *)0xFFFFFC18))
/*=========================================================================
[ Peripheral Identifiers : SPEC :: P.34 ]==================================
==========================================================================*/
#define AIC_FIQ 0 // Advanced Interrupt Controller
#define SYSC 1 // System
#define PIOA 2 // Parallel I/O Controller A
#define ADC 4 // Analog-to Digital Converter
#define SPI 5 // Serial Peripheral Interface
#define US0 6 // USART 0
#define US1 7 // USART 1
#define SSC 8 // Synchronous Serial Controller
#define TWI 9 // Two-wire Interface
#define PWMC 10 // PWM Controller
#define UDP 11 // USB Device Port
#define TC0 12 // Timer/Counter 0
#define TC1 13 // Timer/Counter 1
#define TC2 14 // Timer/Counter 2
#define AIC_IRQ0 30 // Advanced Interrupt Controller
#define AIC_IRQ1 31 // Advanced Interrupt Controller
/*======================================================================
[ Advanced Interrupt Controller (AIC) : SPEC :: P.198 ]=================
========================================================================*/
#define AIC_SMR0 (*((volatile unsigned int *)0xFFFFF000))
#define AIC_SMR1 (*((volatile unsigned int *)0xFFFFF004))
#define AIC_SMR2 (*((volatile unsigned int *)0xFFFFF008))
#define AIC_SMR3 (*((volatile unsigned int *)0xFFFFF00C))
#define AIC_SMR4 (*((volatile unsigned int *)0xFFFFF010))
#define AIC_SMR5 (*((volatile unsigned int *)0xFFFFF014))
#define AIC_SMR6 (*((volatile unsigned int *)0xFFFFF018))
#define AIC_SMR7 (*((volatile unsigned int *)0xFFFFF01C))
#define AIC_SMR8 (*((volatile unsigned int *)0xFFFFF020))
#define AIC_SMR9 (*((volatile unsigned int *)0xFFFFF024))
#define AIC_SMR10 (*((volatile unsigned int *)0xFFFFF028))
#define AIC_SMR11 (*((volatile unsigned int *)0xFFFFF02C))
#define AIC_SMR12 (*((volatile unsigned int *)0xFFFFF030))
#define AIC_SMR13 (*((volatile unsigned int *)0xFFFFF034))
#define AIC_SMR14 (*((volatile unsigned int *)0xFFFFF038))
#define AIC_SMR15 (*((volatile unsigned int *)0xFFFFF03C))
#define AIC_SMR16 (*((volatile unsigned int *)0xFFFFF040))
#define AIC_SMR17 (*((volatile unsigned int *)0xFFFFF044))
#define AIC_SMR18 (*((volatile unsigned int *)0xFFFFF048))
#define AIC_SMR19 (*((volatile unsigned int *)0xFFFFF04C))
#define AIC_SMR20 (*((volatile unsigned int *)0xFFFFF050))
#define AIC_SMR21 (*((volatile unsigned int *)0xFFFFF054))
#define AIC_SMR22 (*((volatile unsigned int *)0xFFFFF058))
#define AIC_SMR23 (*((volatile unsigned int *)0xFFFFF05C))
#define AIC_SMR24 (*((volatile unsigned int *)0xFFFFF060))
#define AIC_SMR25 (*((volatile unsigned int *)0xFFFFF064))
#define AIC_SMR26 (*((volatile unsigned int *)0xFFFFF068))
#define AIC_SMR27 (*((volatile unsigned int *)0xFFFFF06C))
#define AIC_SMR28 (*((volatile unsigned int *)0xFFFFF070))
#define AIC_SMR29 (*((volatile unsigned int *)0xFFFFF074))
#define AIC_SMR30 (*((volatile unsigned int *)0xFFFFF078))
#define AIC_SMR31 (*((volatile unsigned int *)0xFFFFF07C))
#define AIC_SVR0 (*((volatile unsigned int *)0xFFFFF080))
#define AIC_SVR1 (*((volatile unsigned int *)0xFFFFF084))
#define AIC_SVR2 (*((volatile unsigned int *)0xFFFFF088))
#define AIC_SVR3 (*((volatile unsigned int *)0xFFFFF08C))
#define AIC_SVR4 (*((volatile unsigned int *)0xFFFFF090))
#define AIC_SVR5 (*((volatile unsigned int *)0xFFFFF094))
#define AIC_SVR6 (*((volatile unsigned int *)0xFFFFF098))
#define AIC_SVR7 (*((volatile unsigned int *)0xFFFFF09C))
#define AIC_SVR8 (*((volatile unsigned int *)0xFFFFF0A0))
#define AIC_SVR9 (*((volatile unsigned int *)0xFFFFF0A4))
#define AIC_SVR10 (*((volatile unsigned int *)0xFFFFF0A8))
#define AIC_SVR11 (*((volatile unsigned int *)0xFFFFF0AC))
#define AIC_SVR12 (*((volatile unsigned int *)0xFFFFF0B0))
#define AIC_SVR13 (*((volatile unsigned int *)0xFFFFF0B4))
#define AIC_SVR14 (*((volatile unsigned int *)0xFFFFF0B8))
#define AIC_SVR15 (*((volatile unsigned int *)0xFFFFF0BC))
#define AIC_SVR16 (*((volatile unsigned int *)0xFFFFF0C0))
#define AIC_SVR17 (*((volatile unsigned int *)0xFFFFF0C4))
#define AIC_SVR18 (*((volatile unsigned int *)0xFFFFF0C8))
#define AIC_SVR19 (*((volatile unsigned int *)0xFFFFF0CC))
#define AIC_SVR20 (*((volatile unsigned int *)0xFFFFF0D0))
#define AIC_SVR21 (*((volatile unsigned int *)0xFFFFF0D4))
#define AIC_SVR22 (*((volatile unsigned int *)0xFFFFF0D8))
#define AIC_SVR23 (*((volatile unsigned int *)0xFFFFF0DC))
#define AIC_SVR24 (*((volatile unsigned int *)0xFFFFF0E0))
#define AIC_SVR25 (*((volatile unsigned int *)0xFFFFF0E4))
#define AIC_SVR26 (*((volatile unsigned int *)0xFFFFF0E8))
#define AIC_SVR27 (*((volatile unsigned int *)0xFFFFF0EC))
#define AIC_SVR28 (*((volatile unsigned int *)0xFFFFF0F0))
#define AIC_SVR29 (*((volatile unsigned int *)0xFFFFF0F4))
#define AIC_SVR30 (*((volatile unsigned int *)0xFFFFF0F8))
#define AIC_SVR31 (*((volatile unsigned int *)0xFFFFF0FC))
#define AIC_IVR (*((volatile unsigned int *)0xFFFFF100))
#define AIC_FVR (*((volatile unsigned int *)0xFFFFF104))
#define AIC_ISR (*((volatile unsigned int *)0xFFFFF108))
#define AIC_IPR (*((volatile unsigned int *)0xFFFFF10C))
#define AIC_IMR (*((volatile unsigned int *)0xFFFFF110))
#define AIC_CISR (*((volatile unsigned int *)0xFFFFF114))
//<Reserved>===================================================
//<Reserved>===================================================
#define AIC_IECR (*((volatile unsigned int *)0xFFFFF120))
#define AIC_IDCR (*((volatile unsigned int *)0xFFFFF124))
#define AIC_ICCR (*((volatile unsigned int *)0xFFFFF128))
#define AIC_ISCR (*((volatile unsigned int *)0xFFFFF12C))
#define AIC_EOICR (*((volatile unsigned int *)0xFFFFF130))
#define AIC_SPU (*((volatile unsigned int *)0xFFFFF134))
#define AIC_DCR (*((volatile unsigned int *)0xFFFFF138))
//<Reserved>==================================================
#define AIC_FFER (*((volatile unsigned int *)0xFFFFF140))
#define AIC_FFDR (*((volatile unsigned int *)0xFFFFF144))
#define AIC_FFSR (*((volatile unsigned int *)0xFFFFF148))
#define PRIOR 0
#define SRCTYPE 5
#endif // __ARM_H__[ LED 헤더 파일 ]
#ifndef __LED_H__
#define __LED_H__
void Init_LED(void);
void LED_toggle(void);
#define LED_Pin 0 // LED Pin Number
#endif // __LED_H__[ LED 함수 파일 ]
#include "arm.h"
#include "led.h"
void Init_LED(void)
{
PMC_PCER = 1 << PIOA;
PIO_OWER = 1 << LED_Pin;
PIO_PER = 1 << LED_Pin;
PIO_OER = 1 << LED_Pin;
PIO_SODR = 1 << LED_Pin;
return ;
}
void LED_toggle(void)
{
if(0 != (PIO_ODSR & (1<<LED_Pin))) // LED off 이면...
{
PIO_CODR = 1 << LED_Pin;
}
else // LED on 이면...
{
PIO_SODR = 1 << LED_Pin;
}
return ;
}[ AIC 헤더 파일 ]
#ifndef __AIC_H__
#define __AIC_H__
void Init_AIC(void);
void AIC_IRQ_Led(void);
#define IRQ_Pin 15 // IRQ Pin Number
#endif //__AIC_H__[ AIC 함수 파일 ]
#include "arm.h"
#include "aic.h"
#include "led.h"
void Init_AIC(void)
{
PMC_PCER = 1 << PIOA; // System Clock Enable
PIO_ODR = 1 << IRQ_Pin; // Output Disable
PIO_PER = 1 << IRQ_Pin; // PIO Enable
PIO_IDR = 1 << IRQ_Pin; // Interrupt Disable
AIC_IDCR = 1 << PIOA; // Interrupt Disable Command
AIC_SVR2 = (unsigned int)AIC_IRQ_Led;
AIC_SMR2 = (1 << SRCTYPE) | (0 <<PRIOR);
AIC_ICCR = 1 << PIOA; // AIC Interrupt clear Command
PIO_IFER = 1 << IRQ_Pin; // Glitch Filter
AIC_ISCR = 1 << PIOA; // AIC Interrupt Set
PIO_IER = 1 << IRQ_Pin; // PIO Interrupt Enable
AIC_IECR = 1 << PIOA; // AIC Interrupt Enable
return ;
}
void AIC_IRQ_Led(void)
{
volatile unsigned int dly;
if((1<<IRQ_Pin)==PIO_ISR)
{
LED_toggle();
}
for(dly = 0;300000 > dly; dly++);PIO_ISR;
AIC_EOICR = 0; // End of Interrupt
return ;
}[ main 함수 파일 ]
#include "arm.h"
#include "led.h"
#include "aic.h"
//[ 함수 선언부 ]====================
void Init(void); // 함수 호출 함수
int main()
{
Init();
while(1);
return 0;
}
void Init(void)
{
Init_LED();
Init_AIC();
return ;
}< 실행 결과 동영상 참고 >
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