LED5运行闪亮,LED0 渐亮渐暗
#include "xc.h" // 调用头文件
// CONFIG1
#pragma config FOSC = HS // Oscillator Selection (HS Oscillator, High-speed crystal/resonator connected between OSC1 and OSC2 pins)
#pragma config WDTE = OFF // Watchdog Timer Enable (WDT disabled)
#pragma config PWRTE = OFF // Power-up Timer Enable (PWRT disabled)
#pragma config MCLRE = ON // MCLR Pin Function Select (MCLR/VPP pin function is MCLR)
#pragma config CP = OFF // Flash Program Memory Code Protection (Program memory code protection is disabled)
#pragma config CPD = OFF // Data Memory Code Protection (Data memory code protection is disabled)
#pragma config BOREN = OFF // Brown-out Reset Enable (Brown-out Reset disabled)
#pragma config CLKOUTEN = OFF // Clock Out Enable (CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin)
#pragma config IESO = ON // Internal/External Switchover (Internal/External Switchover mode is enabled)
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled)
// CONFIG2
#pragma config WRT = OFF // Flash Memory Self-Write Protection (Write protection off)
#pragma config VCAPEN = OFF // Voltage Regulator Capacitor Enable (All VCAP pin functionality is disabled)
#pragma config PLLEN = OFF // PLL Enable (4x PLL disabled)
#pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will cause a Reset)
#pragma config BORV = LO // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.)
#pragma config LVP = OFF // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming)
//-------------------------------------------------------------------------------
#define _XTAL_FREQ 8000000L //外部 8MHz
#define LED0 LATCbits.LATC2 //LED宏定义
#define LED1 LATCbits.LATC1
#define LED2 LATCbits.LATC0
#define LED3 LATAbits.LATA5
#define LED4 LATAbits.LATA3
#define LED5 LATAbits.LATA2
#define SCLK LATBbits.LATB0 //74HC595时钟
#define SDAT LATBbits.LATB1 //74HC595数据
#define SRCK LATCbits.LATC5 //74HC595锁存
#define KEY0 PORTEbits.RE3 //KEY宏定义
#define KEY1 PORTBbits.RB5
#define KEY2 PORTBbits.RB4
//-------------------------------------------------------------------------------
#define TMR1HPRELOAD 0xF0 //定时器初值
#define TMR1LPRELOAD 0x9B
unsigned char TickClock = 0; //2.5mS 时基
unsigned char Tmr1conunt = 0; //定时计数
//-------------------------------------------------------------------------------
// TMR1定时器初始化
//-------------------------------------------------------------------------------
void TMR1_Init(void)
{
T1CONbits.TMR1CS = 0; //TMR1时钟 FOSC/4
T1CONbits.T1CKPS = 1; //输入分频比1:2
TMR1H = 0xF0; //8MHz 4mS
TMR1L = 0x5F;
TMR1IF = 0; //清中断标志
TMR1IE = 1; //中断允许
}
//-------------------------------------------------------------------------------
// 中断程序
//-------------------------------------------------------------------------------
void interrupt SystemISR(void)
{
if(TMR1IE & TMR1IF) // TMR1中断
{
TMR1IF= 0;
TMR1H = 0xF0;
TMR1L = 0x5F;
TickClock = 1; // 标志位
Tmr1conunt ++; // 计数
}
}
//-------------------------------------------------------------------------------
// CCP1初始化
//-------------------------------------------------------------------------------
void CCP1_Init(void)
{
CCP1CON = 0b00001100; //CCP1 为PWM模式
CCPTMRS0= 0b00000000; //CCP1~4 时钟来源TMR2
CCPTMRS1= 0b00000000; //CCP5 以Timer2 作为定时器
CCP1IE = 0;
CCP1IF = 0;
T2CON = 0b01001100; // Postcaler 1:10, T2ON
PR2 = 249; // PWM周期 = (PR2+1)*4*TOSC
// TOSC = 1/FOSC
CCPR1L = 0x00; // 占空比 0
TMR2IF = 0;
TMR2IE = 0;
}
//-------------------------------------------------------------------------------
// CCP占空比程序
//-------------------------------------------------------------------------------
unsigned int PWM_Duty = 0; //PWM 占空比
unsigned char PWM_FLAG = 0; //渐变标志位
void Conver_CCPR1L(unsigned int Duty) //PWM 占空比转换
{
CCPR1L = (unsigned char)(Duty>>2);
CCP1CON |= (unsigned char)((Duty&0x0003)<<4);
}
//-------------------------------------------------------------------------------
// PWM控制LED部分
//-------------------------------------------------------------------------------
void PWM_LED(void)
{
if (TickClock == 1) //2.5mS
{
TickClock = 0;
if(PWM_FLAG == 1) //PWM LED 渐暗
{
if(PWM_Duty != 0)
PWM_Duty --;
else
PWM_FLAG = 0;
}
else //PWM LED 渐亮
{
if(PWM_Duty <1023)
PWM_Duty++;
else
PWM_FLAG = 1;
}
Conver_CCPR1L(PWM_Duty);
}
}
//-------------------------------------------------------------------------------
// 系统初始化
//-------------------------------------------------------------------------------
void System_Init(void)
{
ADCON1 = 0b10010011; //Fosc/8 Vref = FVR
ADCON0 = 0b00000001; //ADON = 1 As AN0
FVRCON = 0b10000011; //Vref+ = 4.096V
LATA = 0b00000000; //端口电平初始化
LATB = 0b00000000;
LATC = 0b00000000;
LATD = 0b00000000;
LATE = 0b00000000;
TRISA = 0b11000001; //输入
ANSELA = 0b00000001; //RA0模拟 LED
TRISB = 0b00110000; //RB4 RB5 mTouch
ANSELB = 0b00110000; //74HC164 CLK DAT
TRISC = 0b10011000; //UART I2C
TRISD = 0b00000000; //输出
ANSELD = 0b00000000; //数字I/O
TRISE = 0b00000000; //输出
ANSELE = 0b00000000; //数字I/O
}
//-------------------------------------------------------------------------------
// LED灯开机显示
//-------------------------------------------------------------------------------
void StartViewLED(void)
{
LED0 = 1; //LED0-LED5 亮
LED1 = 1;
LED2 = 1;
LED3 = 1;
LED4 = 1;
LED5 = 1;
__delay_ms(800); //延时
LED0 = 0; //LED0-LED5 灭
LED1 = 0;
LED2 = 0;
LED3 = 0;
LED4 = 0;
LED5 = 0;
__delay_ms(50); //延时
}
//-------------------------------------------------------------------------------
// 主程序部分
//-------------------------------------------------------------------------------
void main(void)
{
System_Init(); //系统初始化
StartViewLED(); //开机LED显示
TMR1_Init(); //TMR1初始化
CCP1_Init(); //CCP1初始化
INTCONbits.PEIE = 1; //外设中断
INTCONbits.GIE = 1; //系统中断
T1CONbits.TMR1ON= 1; //TMR1使能
while(1)
{
PWM_LED(); //渐变
if(Tmr1conunt > 199) //500mS
{
Tmr1conunt = 0;
LED5 = !LED5; //运行灯
}
}
}
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