In my older blog "PIC32MZ tutorial -- Key Debounce", I shows how to acheive key debounce with port polling. At this moment, I write an application which uses External Interrupt.  Therefore, only generates interrupt and starts debounce when the falling or raising edge happens, so it will eliminate the MCU load of port polling. Finally, this application runs wonderfully on PIC32MZ EC Starter Kit. The button on RB14 released, the LED on RH0 lights up. and the button of RB14 pressed, the LED on RH0 puts out. The below is the copy of code of this application.

#include <xc.h>
#include <sys/attribs.h>
#pragma config FMIIEN = ON // Ethernet RMII/MII Enable (MII Enabled) // need a 25MHz XTAL in MII mode, a 50MHz Clock in RMII mode.
#pragma config FETHIO = ON // Ethernet I/O Pin Select (Default Ethernet I/O)
#pragma config PGL1WAY = ON // Permission Group Lock One Way Configuration (Allow only one reconfiguration)
#pragma config PMDL1WAY = ON // Peripheral Module Disable Configuration (Allow only one reconfiguration)
#pragma config IOL1WAY = ON // Peripheral Pin Select Configuration (Allow only one reconfiguration)
#pragma config FUSBIDIO = OFF // USB USBID Selection (Controlled by Port Function) // DEVCFG2  7FF9B11A
#pragma config FPLLIDIV = DIV_3 // System PLL Input Divider (3x Divider)
#pragma config FPLLRNG = RANGE_5_10_MHZ // System PLL Input Range (5-10 MHz Input)
#pragma config FPLLICLK = PLL_POSC // System PLL Input Clock Selection (POSC is input to the System PLL)
#pragma config FPLLMULT = MUL_50 // System PLL Multiplier (PLL Multiply by 50) //PLL must output between 350 and 700 MHz
#pragma config FPLLODIV = DIV_2 // System PLL Output Clock Divider (2x Divider)
#pragma config UPLLFSEL = FREQ_24MHZ // USB PLL Input Frequency Selection (USB PLL input is 24 MHz)
#pragma config UPLLEN = OFF // USB PLL Enable (USB PLL is disabled) // DEVCFG1  7F653839
#pragma config FNOSC = SPLL // Oscillator Selection Bits (System PLL)
#pragma config DMTINTV = WIN_127_128 // DMT Count Window Interval (Window/Interval value is 127/128 counter value)
#pragma config FSOSCEN = OFF // Secondary Oscillator Enable (Disable SOSC)
#pragma config IESO = OFF // Internal/External Switch Over (Disabled)
#pragma config POSCMOD = EC // Primary Oscillator Configuration (External clock mode)
#pragma config OSCIOFNC = ON // CLKO Output Signal Active on the OSCO Pin (Enabled)
#pragma config FCKSM = CSDCMD // Clock Switching and Monitor Selection (Clock Switch Disabled, FSCM Disabled)
#pragma config WDTPS = PS32 // Watchdog Timer Postscaler (1:32)
#pragma config WDTSPGM = STOP // Watchdog Timer Stop During Flash Programming (WDT stops during Flash programming)
#pragma config WINDIS = NORMAL // Watchdog Timer Window Mode (Watchdog Timer is in non-Window mode)
#pragma config FWDTEN = OFF // Watchdog Timer Enable (WDT Disabled)
#pragma config FWDTWINSZ = WINSZ_25 // Watchdog Timer Window Size (Window size is 25%)
#pragma config DMTCNT = DMT31 // Deadman Timer Count Selection (2^31 (2147483648))
#pragma config FDMTEN = OFF // Deadman Timer Enable (Deadman Timer is disabled) // DEVCFG0  FFFFFFF7
#pragma config DEBUG = OFF // Background Debugger Enable (Debugger is disabled)
#pragma config JTAGEN = ON // JTAG Enable (JTAG Port Enabled)
#pragma config ICESEL = ICS_PGx2 // ICE/ICD Comm Channel Select (Communicate on PGEC2/PGED2)
#pragma config TRCEN = ON // Trace Enable (Trace features in the CPU are enabled)
#pragma config BOOTISA = MIPS32 // Boot ISA Selection (Boot code and Exception code is MIPS32)
#pragma config FECCCON = OFF_UNLOCKED // Dynamic Flash ECC Configuration (ECC and Dynamic ECC are disabled (ECCCON bits are writable))
#pragma config FSLEEP = OFF // Flash Sleep Mode (Flash is powered down when the device is in Sleep mode)
#pragma config DBGPER = ALLOW_PG2 // Debug Mode CPU Access Permission (Allow CPU access to Permission Group 2 permission regions)
#pragma config EJTAGBEN = NORMAL // EJTAG Boot (Normal EJTAG functionality) // DEVCP0
#pragma config CP = OFF // Code Protect (Protection Disabled) #define Sys_Conf() PRECON = 0x12
#define LED_IOCTL()       TRISHCLR = (1<<0)
#define LED_SETON() LATHSET = (1<<0)
#define LED_SETOFF() LATHCLR = (1<<0)
#define LED_ONOFF() LATHINV = (1<<0)
#define LED_OPEN() ANSELH &= 0xFFFFFFFE typedef enum _LED_STATE_t {
/* Describe structure member. */
OFF = 0, /* Describe structure member. */
ON = 1 } LED_STATE_t; LED_STATE_t PreLedState, LedState;
#define DEBOUNCE_Input          (PORTB & 0x4000)
#define DEBOUNCE_Open() ANSELB = 0xFFFFBFFF
#define DEBOUNCE_IOCtl() CNPUBSET = 0x4000
#define DEBOUNCE_Output LedState
#define DEBOUNCE_ThreholdLow 0
#define DEBOUNCE_ThreholdHigh 100 volatile unsigned char DEBOUNCE_EventStart;
//volatile unsigned char DEBOUNCE_TimeFlag;
unsigned long DEBOUNCE_PreInput;
unsigned int DEBOUNCE_Integrator; void Key_Init(void)
{
DEBOUNCE_EventStart = ;
DEBOUNCE_Integrator = DEBOUNCE_ThreholdHigh / ;
//DEBOUNCE_TimeFlag = 0; DEBOUNCE_Open();
DEBOUNCE_IOCtl();
DEBOUNCE_PreInput = DEBOUNCE_Input; //Pps_UnLock();
INT1R = 0x2;
//Pps_Lock();
INTCONCLR = 0x2; IPC2SET = 0x10;
IFS0CLR = 0x100;
IEC0SET = 0x100;
//CNENBSET = 0x1000;
//IPC29SET = 0x12000000;
//IFS3CLR = 0x800000;
//IEC3SET = 0x800000;
//CNCONBSET = 0x8000;
} //void Key_Scheduler(void)
void Key_Debounce(void)
{
//if (DEBOUNCE_TimeFlag)
//{
if (DEBOUNCE_EventStart)
{
if (DEBOUNCE_Input == )
{
if (DEBOUNCE_Integrator-- == DEBOUNCE_ThreholdLow)
{
DEBOUNCE_Output = ;
DEBOUNCE_PreInput = DEBOUNCE_Input;
DEBOUNCE_EventStart = ;
DEBOUNCE_Integrator = DEBOUNCE_ThreholdHigh / ;
}
}
else //if (DEBOUNCE_Input == 1)
{
if (DEBOUNCE_Integrator++ == DEBOUNCE_ThreholdHigh)
{
DEBOUNCE_Output = ;
DEBOUNCE_PreInput = DEBOUNCE_Input;
DEBOUNCE_EventStart = ;
DEBOUNCE_Integrator = DEBOUNCE_ThreholdHigh / ;
}
}
}
//else if (DEBOUNCE_PreInput != DEBOUNCE_Input)
//{
// DEBOUNCE_EventStart = 1;
//}
//DEBOUNCE_TimeFlag = 0;
//}
} void Led_Init(void)
{
LED_OPEN();
LED_IOCTL();
LED_SETON();
LedState = ON;
PreLedState = LedState;
} void Tmr1_Init(void)
{
T1CON = 0x8010;
PR1 = 0x30D3;
IPC1SET = 0x5;
TMR1 = ;
IEC0SET = 0x10;
IFS0CLR = 0x10;
} void Tmr1_Write(unsigned int value)
{
TMR1 = value & 0xFFFF;
} void __ISR(_EXTERNAL_1_VECTOR,ipl4AUTO) Ext1_Handler(void)
{
if ((INTCON & 0x2) == )
{
INTCONSET = 0x2;
}
else
{
INTCONCLR = 0x2;
}
DEBOUNCE_EventStart = ;
IFS0CLR = 0x100; // Clear flag
} void __ISR(_TIMER_1_VECTOR,ipl1AUTO) Timer1_Handler(void)
{
//DEBOUNCE_TimeFlag = 1;
Key_Debounce();
Tmr1_Write();
IFS0CLR = 0x10; // Clear flag
} void main(void)
{
Sys_Conf();
//Wdt_Init();
Led_Init();
Key_Init();
Tmr1_Init();
Mvec_Interrupt(); while ()
{
//Wdt_Refresh();
//Key_Scheduler();
Led_Scheduler();
}
}

PIC32MZ tutorial -- External Interrupt的更多相关文章

  1. PIC32MZ tutorial -- OC Interrupt

    In my previous blog "PIC32MZ tutorial -- Output Compare", I shows how to apply Output Comp ...

  2. PIC32MZ tutorial -- Timer Interrupt

    An interrupt is an internal or external event that requires quick attention from the controller. The ...

  3. External Input Counter and External interrupt

    External Input Counter and External interrupt : count the input signal from the button. So what is t ...

  4. Software UART, Timer, PWM, External Interrupt

    How can you add extra hardware UARTs to a 32bit TMS470 ARM7-based microcontroller at zero cost? Solu ...

  5. (STM32F4) External Interrupt

    外部中斷(External Interupt) 在MCU中是很常見而且很常用到的基本function,所以就不多做解釋.不過因為每顆MCU的配置都不太一樣所以在此記錄下來. External Inte ...

  6. PIC32MZ tutorial -- Output Compare

    Output Compare is a powerful feature of embedded world. The PIC32 Output Compare module compares the ...

  7. PIC32MZ tutorial -- 32-bit Timer

    The microcontroller is PIC32MZ2048ECH144 on the PIC32MZ EC Starter Kit. This microcontroller has fou ...

  8. PIC32MZ tutorial -- Input Capture

    Today I accomplish a simple application for PIC32MZ EC Starter Kit. This application uses Input Capt ...

  9. PIC32MZ tutorial -- Change Notification

    In my last post I implement "Key Debounce" with port polling, port polling is not very eff ...

随机推荐

  1. Ret2Libc 练习(2) -- VirtualProtect

    这几天做了NSCTF和GCTF,耽误了几天,今天继续. 这次绕过DEP的方法是利用VirtualProtect函数将shellcode所在的内存属性改成可执行状态就可以绕过DEP了. 首先看一下Vir ...

  2. [BZOJ 3123]森林

    这题和 COT1 一定有 JQ 喵~ 线段树的启发式合并,每次要连接两个点时就对比较小的那棵树暴力 DFS 一边 然后均摊时间依旧是 logn 的,均摊真是世界上最邪恶的东西了…… 然后这题的数据是要 ...

  3. DTO对象

    在EF中,EF生成的对象都是代理对象,这些对象看上去是实体类对象,但是其实都是EF封装好的代理类对象.所以调用EF查询得到的代理类对象有继承于实体对象,所以可以用实体类对象来接收返回的代理类对象.EF ...

  4. nsq

    官网:http://nsq.io (1)描述 都是message broker,rabbitmq久经考验,nsq则是后起之秀.rabbitmq是erlang编写,nsq是golang. 安装:http ...

  5. BarTender如何将条码下的数字嵌入到条码中

    现今社会,在各种包装箱子.书籍.超市商品等东西上面,必不可少的绝对要数条形码或者二维码了.有时候,根据客户的需求或者其他条件限制等原因,我们需要将BarTender 2016条码下的数字嵌入到条码中. ...

  6. rabbitmq 重复ACK导致消息丢失

    rabbitmq 重复确认导致消息丢失 背景 rabbitmq 在应用场景中,大多采用工作队列 work-queue的模式. 在一个常见的工作队列模式中,消费者 worker 将不断的轮询从队列中拉取 ...

  7. NSString和NSMutableString常用方法+NSArray常用代码 (转)

    常见的NSString和NSMutableString方法: NSString方法: [plain] view plaincopy   +(id) stringWithContentsOfFile:p ...

  8. Linux centos 下 安装eclipse c++

    之前在centos6.3版本使用eclipes一切都很正常.最近centos版本升级到6.7后,使用eclipse c++到时候,打开文件,就异常退出了.在网上搜了很久,终于找到解决方法: 现象描述: ...

  9. HTML input="file" 浏览时只显示指定文件类型 xls、xlsx、csv

    html input="file" 浏览时只显示指定文件类型 xls.xlsx.csv <input id="fileSelect" type=" ...

  10. Python第八天

    Python面向对象进阶 一.静态方法 通过@staticmethod装饰器即可把其装饰的方法变为一个静态方法,什么是静态方法呢?其实不难理解,普通的方法,可以在实例化后直接调用,并且在方法里可以通过 ...