我之前研究了6410的io口中断,想对着datasheet写出中断程序,但是发现,我虽然对着
datasheet可以知道他每个register的作用,但是它们之间的关联并不是很清楚,于是查了
不少的资料。发现要编一个简单的按键控制io口的中断,其实在6410中很容易就实现了,
大致可以这样:
1.初始化io口的register:包括:gpioXcon,EINT0CON0,EINT0MASK,EINT0PEND
2,初始化中断register: vicxINTENABLE , VIC0VECTADDR
这个链接介绍裸机中断也不错:点击打开链接
下面是我编写的中断控制 蜂鸣器的程序:
建议一定要亲自动手写一下,写不出来再看示例,那样效果绝对不同
/* 设置 gpio k1 gpn0 eint0 k4 gpn3 eint3 k6 gpn5 eint5
vic0 group 0
对应的设置 eintxcon eintxpend eintxmask eintxfltcon
icxintselect vicxaddr
开中断
pwm gpf14 1 on
*/
#include "intc.h"
#include "gpio.h"
#include "def.h"
#include "system.h"
int flag = -1;
/* InitInc()
informantion : int num 0(int_eint0 0,3), int num 1(int_eint 5)
1. enable vic0irqstatus
2.vic0select chose irq or fiq
3,vicxenabel 使能
4 vicxintenclear disable
5,vicxvectaddr isr address register
6.vicvectpriority 每个中断源对应的中断,选16个,排定优先级
7,vic0address 程序执行后,清除
*/
void __irq K0()
{
u32 TEMP;
flag = -flag;
Outp32(rVIC0ADDR,0);
TEMP = GPIO->rEINT0PEND;
TEMP |= 0X1F;
GPIO->rEINT0PEND = TEMP;
}
void __irq K3()
{
u32 TEMP;
flag = 1;
Outp32(rVIC0ADDR,0);
TEMP = GPIO->rEINT0PEND;
TEMP |= 0X1F;
GPIO->rEINT0PEND = TEMP;
}
/*void __irq K5()
{
u32 TEMP;
flag = -flag;
Outp32(rVIC0ADDR,0);
TEMP = GPIO->rEINT0PEND;
TEMP |= 0X1F;
GPIO->rEINT0PEND = TEMP;
}
*/
void InitInc()
{
// Outp32(rVIC0INTSELECT,0X0);使能中断
Outp32(rVIC0INTENABLE,0X1);
// 把中断地址写入vicvectaddr
Outp32(rVIC0VECTADDR+4*0,(u32)K0);
//Outp32(rVIC0VECTADDR+4*0,(u32)K3);
Outp32(rVIC0VECTADDR+4*1,(u32)K5);
}
void Initgpio()
{ u32 TEMP;
// set the interrupt
TEMP = GPIO->rGPIONCON ;
TEMP &= 0XFFF;
TEMP |= 0X882;
GPIO->rGPIONCON = TEMP;
TEMP = GPIO->rGPIONPUD ;
TEMP &= 0XFFF;
TEMP |= 0X882;
GPIO->rGPIONPUD = TEMP;
TEMP = GPIO->rGPIOFCON;
TEMP &= ~(0X3<<28) ;
TEMP |=(0X1<<28);
GPIO->rGPIOFCON = TEMP;
TEMP = GPIO->rGPIOFDAT ;
TEMP &= ~(0x1 <<14);
GPIO->rGPIOFDAT = TEMP;
//gpio 触发设置
TEMP = GPIO->rEINT0CON0 ;
TEMP &=~(0XFFF);
TEMP |=0X640;
GPIO->rEINT0CON0 = TEMP;
// gpio 滤波方式 开启 默认delay
TEMP = GPIO->rEINT0FLTCON0;
TEMP |=0X808080;
GPIO->rEINT0FLTCON0 = TEMP;
// ENABLE GPIO INT
TEMP = GPIO->rEINT0MASK;
TEMP &= ~((0X1)|(0X1<<3)|(0X1<<5));
GPIO->rEINT0MASK = TEMP;
// GPIO EINT0PEND 写 1 清 0
TEMP = GPIO->rEINT0PEND;
TEMP |= 0X1F;
GPIO->rEINT0PEND = TEMP;
}
void BuzzOn()
{ u32 TEMP;
TEMP = GPIO->rGPIOFDAT;
TEMP |= (0X1<<14);
GPIO->rGPIOFDAT = TEMP;
}
void BuzzOff()
{
u32 TEMP;
TEMP = GPIO->rGPIOFDAT;
TEMP &= ~(0X1<<14);
GPIO->rGPIOFDAT = TEMP;
}
int main()
{
//下面两句话一定要有系统使能vic irq
SYSTEM_EnableVIC();
SYSTEM_EnableIRQ();
Initgpio();
InitInc();
while(1)
{
if(flag ==1) BuzzOn();
if(flag ==-1) BuzzOff();
}
}
intc.h
/**************************************************************************************
*
* Project Name : S3C6410 Validation
*
* Copyright 2006 by Samsung Electronics, Inc.
* All rights reserved.
*
* Project Description :
* This software is only for validating functions of the S3C6410.
* Anybody can use this software without our permission.
*
*--------------------------------------------------------------------------------------
*
* File Name : intc.h
*
* File Description : This file declares prototypes of interrupt controller API funcions.
*
* Author : Haksoo,Kim
* Dept. : AP Development Team
* Created Date : 2006/11/08
* Version : 0.1
*
* History
* - Created(Haksoo,Kim 2006/11/08)
* - Added Software Interrupt API function (wonjoon.jang 2007/01/18)
* - Added Interrupt Source for 6410 (2008/02/28)
*
**************************************************************************************/
#ifndef __INTC_H__
#define __INTC_H__
#ifdef __cplusplus
extern "C" {
#endif
#include "def.h"
// VIC0
#define rVIC0IRQSTATUS (VIC0_BASE + 0x00)
#define rVIC0FIQSTATUS (VIC0_BASE + 0x04)
#define rVIC0RAWINTR (VIC0_BASE + 0x08)
#define rVIC0INTSELECT (VIC0_BASE + 0x0c)
#define rVIC0INTENABLE (VIC0_BASE + 0x10)
#define rVIC0INTENCLEAR (VIC0_BASE + 0x14)
#define rVIC0SOFTINT (VIC0_BASE + 0x18)
#define rVIC0SOFTINTCLEAR (VIC0_BASE + 0x1c)
#define rVIC0PROTECTION (VIC0_BASE + 0x20)
#define rVIC0SWPRIORITYMASK (VIC0_BASE + 0x24)
#define rVIC0PRIORITYDAISY (VIC0_BASE + 0x28)
#define rVIC0VECTADDR (VIC0_BASE + 0x100)
#define rVIC0VECPRIORITY (VIC0_BASE + 0x200)
#define rVIC0ADDR (VIC0_BASE + 0xf00)
#define rVIC0PERID0 (VIC0_BASE + 0xfe0)
#define rVIC0PERID1 (VIC0_BASE + 0xfe4)
#define rVIC0PERID2 (VIC0_BASE + 0xfe8)
#define rVIC0PERID3 (VIC0_BASE + 0xfec)
#define rVIC0PCELLID0 (VIC0_BASE + 0xff0)
#define rVIC0PCELLID1 (VIC0_BASE + 0xff4)
#define rVIC0PCELLID2 (VIC0_BASE + 0xff8)
#define rVIC0PCELLID3 (VIC0_BASE + 0xffc)
#endif
gpio.h
/**************************************************************************************
*
* Project Name : S3C6410 Validation
*
* Copyright 2006 by Samsung Electronics, Inc.
* All rights reserved.
*
* Project Description :
* This software is only for validating functions of the S3C6410.
* Anybody can use this software without our permission.
*
*--------------------------------------------------------------------------------------
*
* File Name : gpio.h
*
* File Description : This file declares prototypes of GPIO API funcions.
*
* Author : Heemyung.Noh
* Dept. : AP Development Team
* Created Date : 2006/12/26
* Version : 0.1
*
* History
* - Created(Heemyung.Noh 2006/12/26)
* - Added EINT (Wonjoon.jang 2007/01/03)
*
**************************************************************************************/
#ifndef __GPIO_H__
#define __GPIO_H__
#ifdef __cplusplus
extern "C" {
#endif
#include "def.h"
#include "sfr6410.h"
#define Low_Level 0x0
#define High_Level 0x1
#define Falling_Edge 0x2
#define Rising_Edge 0x4
#define Both_Edge 0x6
#define GPIO ( ( volatile oGPIO_REGS * ) (GPIO_BASE))
#define Inp32(ADDR) *((volatile u32 *)ADDR)
#define Outp32(ADDR,data) *((volatile u32 *)ADDR)=data
typedef struct tag_GPIO_REGS
{
u32 rGPIOACON; //0x7F008000
u32 rGPIOADAT;
u32 rGPIOAPUD;
u32 rGPIOACONSLP;
u32 rGPIOAPUDSLP;
u32 reserved1[3];
u32 rGPIOBCON; //0x7F008020
u32 rGPIOBDAT;
u32 rGPIOBPUD;
u32 rGPIOBCONSLP;
u32 rGPIOBPUDSLP;
u32 reserved2[3];
u32 rGPIOCCON; //0x7F008040
u32 rGPIOCDAT;
u32 rGPIOCPUD;
u32 rGPIOCCONSLP;
u32 rGPIOCPUDSLP;
u32 reserved3[3];
u32 rGPIODCON; //0x7F008060
u32 rGPIODDAT;
u32 rGPIODPUD;
u32 rGPIODCONSLP;
u32 rGPIODPUDSLP;
u32 reserved4[3];
u32 rGPIOECON; //0x7F008080
u32 rGPIOEDAT;
u32 rGPIOEPUD;
u32 rGPIOECONSLP;
u32 rGPIOEPUDSLP;
u32 reserved5[3];
u32 rGPIOFCON; //0x7F0080A0
u32 rGPIOFDAT;
u32 rGPIOFPUD;
u32 rGPIOFCONSLP;
u32 rGPIOFPUDSLP;
u32 reserved6[3];
u32 rGPIOGCON; //0x7F0080C0
u32 rGPIOGDAT;
u32 rGPIOGPUD;
u32 rGPIOGCONSLP;
u32 rGPIOGPUDSLP;
u32 reserved7[3];
u32 rGPIOHCON0; //0x7F0080E0
u32 rGPIOHCON1;
u32 rGPIOHDAT;
u32 rGPIOHPUD;
u32 rGPIOHCONSLP;
u32 rGPIOHPUDSLP;
u32 reserved8[2];
u32 rGPIOICON; //0x7F008100
u32 rGPIOIDAT;
u32 rGPIOIPUD;
u32 rGPIOICONSLP;
u32 rGPIOIPUDSLP;
u32 reserved9[3];
u32 rGPIOJCON; //0x7F008120
u32 rGPIOJDAT;
u32 rGPIOJPUD;
u32 rGPIOJCONSLP;
u32 rGPIOJPUDSLP;
u32 reserved10[3];
u32 rGPIOOCON; //0x7F008140
u32 rGPIOODAT;
u32 rGPIOOPUD;
u32 rGPIOOCONSLP;
u32 rGPIOOPUDSLP;
u32 reserved11[3];
u32 rGPIOPCON; //0x7F008160
u32 rGPIOPDAT;
u32 rGPIOPPUD;
u32 rGPIOPCONSLP;
u32 rGPIOPPUDSLP;
u32 reserved12[3];
u32 rGPIOQCON; //0x7F008180
u32 rGPIOQDAT;
u32 rGPIOQPUD;
u32 rGPIOQCONSLP;
u32 rGPIOQPUDSLP;
u32 reserved13[3];
u32 rSPCON; //0x7F0081A0
u32 reserved14[3];
u32 rMEM0CONSTOP; //0x7F0081B0
u32 rMEM1CONSTOP; //0x7F0081B4
u32 reserved15[2];
u32 rMEM0CONSLP0; //0x7F0081C0
u32 rMEM0CONSLP1; //0x7F0081C4
u32 rMEM1CONSLP; //0x7F0081C8
u32 reserved;
u32 rMEM0DRVCON; //0x7F0081D0
u32 rMEM1DRVCON; //0x7F0081D4
u32 reserved16[10];
u32 rEINT12CON; //0x7f008200
u32 rEINT34CON; //0x7f008204
u32 rEINT56CON; //0x7f008208
u32 rEINT78CON; //0x7f00820C
u32 rEINT9CON; //0x7f008210
u32 reserved17[3];
u32 rEINT12FLTCON; //0x7f008220
u32 rEINT34FLTCON; //0x7f008224
u32 rEINT56FLTCON; //0x7f008228
u32 rEINT78FLTCON; //0x7f00822C
u32 rEINT9FLTCON; //0x7f008230
u32 reserved18[3];
u32 rEINT12MASK; //0x7f008240
u32 rEINT34MASK; //0x7f008244
u32 rEINT56MASK; //0x7f008248
u32 rEINT78MASK; //0x7f00824C
u32 rEINT9MASK; //0x7f008250
u32 reserved19[3];
u32 rEINT12PEND; //0x7f008260
u32 rEINT34PEND; //0x7f008264
u32 rEINT56PEND; //0x7f008268
u32 rEINT78PEND; //0x7f00826C
u32 rEINT9PEND; //0x7f008270
u32 reserved20[3];
u32 rPRIORITY; //0x7f008280
u32 rSERVICE; //0x7f008284
u32 rSERVICEPEND; //0x7f008288
u32 reserved21;
u32 reserved22[348];
u32 rGPIOKCON0; //0x7f008800
u32 rGPIOKCON1; //0x7f008804
u32 rGPIOKDAT; //0x7f008808
u32 rGPIOKPUD; //0x7f00880c
u32 rGPIOLCON0;
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