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| ubuntu8.04命令行IP地址设置方法 |
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[ 2008-5-26 15:18:00 | By: MCUBLOG ] |
我用的是ubuntu8.04，IP命令行配置如下：
sudo gedit /etc/network/interfaces
DHCP配置如下（假设通过eth1上网）
# The primary network interface - use DHCP to find our address
auto eth1
iface eth1 inet dhcp //指定为dhcp
然后重启
sudo /etc/init.d/networking restart
静态IP地址配置如下（假设通过eth1上网）
# The primary network interface
auto eth1
iface eth1 inet static//指定为static
address 192.168.3.90//IP地址
gateway 192.168.3.1//网关
netmask 255.255.255.0//子网掩码
同样需要重启
sudo /etc/init.d/networking restart
如果有必要，配置DNS
sudo gedit /etc/resolv.conf
nameserver 192.168.3.2
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| Re:ubuntu8.04命令行IP地址设置方法 |
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[ 2008-5-28 17:03:27 | By: chenshaocheng ] |
 如果可以帮我解释一下下面这段程序(SPWM波生成实验代码).谢谢!
＃i nclude "math.h"
＃i nclude "f2407_c.h"
#define PI 3.1415926
extern void ini(void);
extern interrupt void timer2_isr(void);
void delay5s(void);
float sin_table[33]={0,0.189,0.371,0.541,0.690,0.815,0.909,0.972,0.98,
0.972,0.909,0.815,0.690,0.541,0.371,0.189,0,
-0.189,-0.371,-0.541,-0.690,-0.815,-0.909,-0.972,-0.98,
-0.972,-0.909,-0.815,-0.690,-0.541,-0.371,-0.189,0};
unsigned int index_pwm=0;
unsigned int a,b,c=0;
float timer2_per=200;
unsigned int num_f_d=33;
float f;
unsigned int d;
void main(void)
{
unsigned int i,j;
ini();
asm(" CLRC INTM");--开总中断
for(i=0;i<10;i++)
delay5s();
delay5s();
delay5s();
delay5s();
delay5s();
*IMR |= 0x0001;
for(;;)delay5s();;
}
void delay5s(void)
{
unsigned long i;
for(i=0;i<5000;i++);
}
void ini(void)
{
unsigned int e;
*SCSR1 = 0x00FD;
*SCSR2 = (*SCSR2 | 0x000B) & 0x000F;
*WDCR = 0x00E8;
WSGR = 0x0040;
*MCRA = 0x0fc0;
*MCRB = 0xFE00;
*MCRC = 0x0000;
*PFDATDIR = *PFDATDIR | 0x2000;
*T1CON = 0x0000;
*T2CON = 0x0000;
*GPTCONA = 0x0080;
*T1CNT = 0x0000;
*T1PR =32*timer2_per;
d=*T1PR;
*DBTCONA = 0xff3;
*ACTRA = 0x0666;
*COMCONA = 0x8200;
*T1CON = 0x0840;
*DBTCONA=0xff3;
*T2CNT = 0x0000;
*T2PR = timer2_per;
*T2CON = 0xD640;
*IMR = 0x0000;
*IFR = 0x003F;
*IMR = 0x0004;
*EVAIFRA = 0xFFFF;
*EVAIFRB = 0xFFFF;
*EVAIFRC = 0xFFFF;
*EVAIMRA = 0x0000;
*EVAIMRB = 0x0001;
*EVAIMRC = 0x0000;
*EVBIFRA = 0xFFFF;
*EVBIFRB = 0xFFFF;
*EVBIFRC = 0xFFFF;
*EVBIMRA = 0x0000;
*EVBIMRB = 0x0000;
*EVBIMRC = 0x0000;
}
interrupt void timer2_isr(void)
{
*EVAIFRB = *EVAIFRB & 0x0001;
f=0.2+156.0/timer2_per;
if(f>0.98)
f=0.98;
a=*CMPR1=f*d*(0.5+0.5*sin_table[index_pwm%num_f_d]);
b=*CMPR2=f*d*(0.5+0.5*sin_table[(index_pwm+((2*num_f_d)/3))%num_f_d]);
c=*CMPR3=f*d*(0.5+0.5*sin_table[(index_pwm+((num_f_d)/3))%num_f_d]);
index_pwm++;
if(index_pwm>=num_f_d)index_pwm=0;
} |
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