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- UID
- 1062083
- 性别
- 男
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用于测量三个脉冲的时间差·～～～ 原理是分别读取每个脉冲来时定时器内的计算值
uint rise_time1,rise_time2,rise_time3;
uchar rise_flag;
uchar over_flow;
uint piancha1,piancha2;
uchar table1[5];
uchar table2[5];
#pragma interrupt_handler timer0_ovf_isr:17
void timer0_ovf_isr(void)
{
over_flow++;
}
#pragma interrupt_handler timer1_capt_isr:12
void timer1_capt_isr(void)
{
static uchar cishu;
cishu++;
if(cishu==1)
rise_time1=ICR1;
else if(cishu==2)
rise_time2=ICR1;
else if(cishu==3)
{ rise_time3=ICR1; rise_flag=1;}
//timer 1 input capture event, read (int)value in ICR1 using;
// value=ICR1L; //Read low byte first (important)
// value|=(int)ICR1H << 8; //Read high byte and shift into top byte
}
void main()
{
uchar i;
TCCR1B=0X42;
TIMSK=0X24;
rise_flag=0;
LCD1602_initial();
LCD1602_gotoXY(1,2);
LCD1602_sendbyte(iDat,'a');
SEI();
TIMSK|=BIT(4);
while(1)
{
if(rise_flag==1)
{
piancha1=(rise_time2-rise_time1);
piancha2=(rise_time3-rise_time2);
table1[0]=piancha1/10000;
table1[1]=piancha1%10000/1000;
table1[2]=piancha1%1000/100;
table1[3]=piancha1%100/10;
table1[4]=piancha1%10;
table2[0]=piancha2/10000;
table2[1]=piancha2%10000/1000;
table2[2]=piancha2%1000/100;
table2[3]=piancha2%100/10;
table2[4]=piancha2%10;
LCD1602_gotoXY(2,1);
for(i=0;i<4;i++)
{
LCD1602_sendbyte(iDat,table1+0x30);
}
for(i=0;i<4;i++)
{
LCD1602_sendbyte(iDat,table2+0x30);
}
}
}
}
以下是主机部份
#include
#include
#define uchar unsigned char
#define uint unsigned int
#include "delay.h"
#include "lcd.h"
void port_init(void);
//SPI initialize
// clock rate: 1843199hz
void spi_init(void)
{
SPCR = 0x74; //setup SPI
SPSR = 0x00; //setup SPI
DDRB=0X07;
PORTB|=0X08;
}
//call this routine to initialize all peripherals
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
port_init();
spi_init();
SEI(); //re-enable interrupts
}
uchar SPI_Transmit(char cData)
{
/* 启动数据传输 */
SPDR = cData;
/* 等待传输结束 */
while(!(SPSR & (1<<SPIF)));
return SPDR;
}</SPIF)));
uchar SPI_Receive(void)
{
/* 等待接收结束 */
while(!(SPSR & (1<<SPIF)))
;
/* 返回数据 */
return SPDR;
}</SPIF)))
void main()
{
unsigned char pa,i;
init_devices();
LCD1602_initial();
LCD1602_sendbyte(iDat,1+0x30 );
// while(1)
//{
for(i=0;i<2;i++)
{
LCD1602_gotoXY(1, 2);
//SPI_Transmit(0x01);
//pa=SPI_Receive();
LCD1602_sendbyte(iDat,SPI_Transmit(0x01)+0x30 );
}//delayms(1000);
//}
}
以下是从机部份
#include
#include
#define uchar unsigned char
#define uint unsigned int
#include "delay.h"
#include "lcd.h"
void port_init(void);
//SPI initialize
// clock rate: 1843199hz
void spi_init(void)
{
SPCR = 0x64; //setup SPI
SPSR = 0x00; //setup SPI
DDRB=0X08;
PORTB|=0X07;
}
//call this routine to initialize all peripherals
void init_devices(void)
{
CLI(); //disable all interrupts
port_init();
spi_init();
SEI(); //re-enable interrupts
}
void SPI_Transmit(char cData)
{
/* 启动数据传输 */
SPDR = cData;
/* 等待传输结束 */
while(!(SPSR & (1<<SPIF)));
}</SPIF)));
uchar SPI_Receive(void)
{
/* 等待接收结束 */
while(!(SPSR & (1<<SPIF)));
/* 返回数据 */
return SPDR;
}</SPIF)));
void main()
{ unsigned char pp,i;
init_devices();
LCD1602_initial();
LCD1602_sendbyte(iDat,2+0x30 );
//while(1)
//{
for(i=0;i<2;i++)
{
LCD1602_gotoXY(1, 2);
pp=SPI_Receive();
SPI_Transmit(0x03);
LCD1602_sendbyte(iDat,pp+0x30 );
}
//delayms(1001);
//}
}
}
用于测量三个脉冲的时间差·～～～
原理是分别读取每个脉冲来时定时器内的计算值
uint rise_time1,rise_time2,rise_time3;
uchar rise_flag;
uchar over_flow;
uint piancha1,piancha2;
uchar table1[5];
uchar table2[5];
#pragma interrupt_handler timer0_ovf_isr:17
void timer0_ovf_isr(void)
{
over_flow++;
}
#pragma interrupt_handler timer1_capt_isr:12
void timer1_capt_isr(void)
{
static uchar cishu;
cishu++;
if(cishu==1)
rise_time1=ICR1;
else if(cishu==2)
rise_time2=ICR1;
else if(cishu==3)
{ rise_time3=ICR1; rise_flag=1;}
//timer 1 input capture event, read (int)value in ICR1 using;
// value=ICR1L; //Read low byte first (important)
// value|=(int)ICR1H << 8; //Read high byte and shift into top byte
}
void main()
{
uchar i;
TCCR1B=0X42;
TIMSK=0X24;
rise_flag=0;
LCD1602_initial();
LCD1602_gotoXY(1,2);
LCD1602_sendbyte(iDat,'a');
SEI();
TIMSK|=BIT(4);
while(1)
{
if(rise_flag==1)
{
piancha1=(rise_time2-rise_time1);
piancha2=(rise_time3-rise_time2);
table1[0]=piancha1/10000;
table1[1]=piancha1%10000/1000;
table1[2]=piancha1%1000/100;
table1[3]=piancha1%100/10;
table1[4]=piancha1%10;
table2[0]=piancha2/10000;
table2[1]=piancha2%10000/1000;
table2[2]=piancha2%1000/100;
table2[3]=piancha2%100/10;
table2[4]=piancha2%10;
LCD1602_gotoXY(2,1);
for(i=0;i<4;i++)
{
LCD1602_sendbyte(iDat,table1+0x30);
}
for(i=0;i<4;i++)
{
LCD1602_sendbyte(iDat,table2+0x30);
}
}
}
}
关键字：AVR ATMEGA128 输入捕捉功能 |
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