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kangyonghui

2011-09-24 14:25:17
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积分2
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注册2010-05-19

430 中断一个问题

include [COLOR=#000000]<[/COLOR][COLOR=#000000]msp430x23x.h[/COLOR][COLOR=#000000]>[/COLOR][COLOR=#000000]
typedef unsigned [/COLOR][COLOR=#0000ff]char[/COLOR][COLOR=#000000] uchar;
typedef unsigned [/COLOR][COLOR=#0000ff]int[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]uint[/COLOR][COLOR=#000000];

uchar NUM_LED[[/COLOR][COLOR=#800080]16[/COLOR][COLOR=#000000]][/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000]{[/COLOR][COLOR=#800080]0x3f[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x06[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x5b[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x4f[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x66[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x6d[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x7d[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x07[/COLOR][COLOR=#000000],
[/COLOR][COLOR=#800080]0x7f[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x6f[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x77[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x7c[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x39[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x5e[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x79[/COLOR][COLOR=#000000],[/COLOR][COLOR=#800080]0x71[/COLOR][COLOR=#000000]}; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000] 0-f 阴二极管[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000]
[/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000] Delay_1ms([/COLOR][COLOR=#0000ff]uint[/COLOR][COLOR=#000000] i);
[/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000] led_Display(uchar KEY);
uchar scankey([/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000]);

uchar key; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]全局变量，接收按键的值[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000] main()
{
WDTCTL [/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000] WDTPW [/COLOR][COLOR=#000000]+[/COLOR][COLOR=#000000] WDTHOLD; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]关闭看门狗[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000]
P1IES[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]; [/COLOR][COLOR=#808080]///[/COLOR][COLOR=#008000]/P1口键盘检测（中断法）P1.0-P1.3下降沿中断[/COLOR][COLOR=#808080]
[/COLOR][COLOR=#000000] P1IE[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000];
P1IFG[/COLOR][COLOR=#000000]&=~[/COLOR][COLOR=#800080]0X08[/COLOR][COLOR=#000000];[/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]初始化不产生中断[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000]
P1DIR[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0XF0[/COLOR][COLOR=#000000]; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]低4位读入检测电平，高4位输出测量电平[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] P1OUT[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000];

P5DIR[/COLOR][COLOR=#000000]|=[/COLOR][COLOR=#000000]BIT0[/COLOR][COLOR=#000000]+[/COLOR][COLOR=#000000]BIT1; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]选择数码管。[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] P4DIR[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0XFF[/COLOR][COLOR=#000000];[/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]选择数码管的内容。[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] _EINT(); [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]打开全局中断控制位[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] LPM0;
[/COLOR][COLOR=#0000ff]while[/COLOR][COLOR=#000000]([/COLOR][COLOR=#800080]1[/COLOR][COLOR=#000000])
{
[/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]LPM0; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]叫一直处于睡眠状态，有按键中断的时候出中断直接处理。
[/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]led_Display(scankey[color=#FF0000]());[/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]这里不起作用。数码管一直没动作。[/color] }[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000]
}

uchar scankey([/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000])
{
uchar i;
P1OUT[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0x7f[/COLOR][COLOR=#000000]; [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]判断第一行。判断的是输入，故需要0 --- 0111 1111[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]switch[/COLOR][COLOR=#000000](P1IN [/COLOR][COLOR=#000000]&[/COLOR][COLOR=#000000] [/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000])
{
[/COLOR][COLOR=#0000ff]case[/COLOR][COLOR=#000000] [/COLOR][COLOR=#800080]0X0e[/COLOR][COLOR=#000000]: [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]第一列[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]for[/COLOR][COLOR=#000000](i[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]255[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]>[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]--[/COLOR][COLOR=#000000]); [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]延时[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]while[/COLOR][COLOR=#000000](P1IN[/COLOR][COLOR=#000000]&[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]!=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]); [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]确认按键释放[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] key[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];
[/COLOR][COLOR=#0000ff]break[/COLOR][COLOR=#000000];

[/COLOR][COLOR=#0000ff]case[/COLOR][COLOR=#000000] [/COLOR][COLOR=#800080]0x0d[/COLOR][COLOR=#000000]: [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]第二列 [/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]for[/COLOR][COLOR=#000000](i[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]255[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]>[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]--[/COLOR][COLOR=#000000]);
[/COLOR][COLOR=#0000ff]while[/COLOR][COLOR=#000000](P1IN[/COLOR][COLOR=#000000]&[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]!=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]);
key[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]1[/COLOR][COLOR=#000000];
[/COLOR][COLOR=#0000ff]break[/COLOR][COLOR=#000000];

[/COLOR][COLOR=#0000ff]case[/COLOR][COLOR=#000000] [/COLOR][COLOR=#800080]0x0b[/COLOR][COLOR=#000000]: [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]第三列[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]for[/COLOR][COLOR=#000000](i[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]255[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]>[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]--[/COLOR][COLOR=#000000]);
[/COLOR][COLOR=#0000ff]while[/COLOR][COLOR=#000000](P1IN[/COLOR][COLOR=#000000]&[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]!=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]);
key[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]3[/COLOR][COLOR=#000000];
[/COLOR][COLOR=#0000ff]break[/COLOR][COLOR=#000000];

[/COLOR][COLOR=#0000ff]case[/COLOR][COLOR=#000000] [/COLOR][COLOR=#800080]0x07[/COLOR][COLOR=#000000]: [/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]第四列[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] [/COLOR][COLOR=#0000ff]for[/COLOR][COLOR=#000000](i[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]255[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]>[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];i[/COLOR][COLOR=#000000]--[/COLOR][COLOR=#000000]);
[/COLOR][COLOR=#0000ff]while[/COLOR][COLOR=#000000](P1IN[/COLOR][COLOR=#000000]&[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]!=[/COLOR][COLOR=#800080]0X0F[/COLOR][COLOR=#000000]);
key[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]4[/COLOR][COLOR=#000000];
[/COLOR][COLOR=#0000ff]break[/COLOR][COLOR=#000000];

}

[/COLOR][COLOR=#0000ff]return[/COLOR][COLOR=#000000] key;
}

[/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000] Delay_1ms([/COLOR][COLOR=#0000ff]uint[/COLOR][COLOR=#000000] i)
{
[/COLOR][COLOR=#0000ff]uint[/COLOR][COLOR=#000000] x,j;
[/COLOR][COLOR=#0000ff]for[/COLOR][COLOR=#000000](j[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];j[/COLOR][COLOR=#000000]<[/COLOR][COLOR=#000000]i;j[/COLOR][COLOR=#000000]++[/COLOR][COLOR=#000000])
[/COLOR][COLOR=#0000ff]for[/COLOR][COLOR=#000000](x[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#800080]0[/COLOR][COLOR=#000000];x[/COLOR][COLOR=#000000]<=[/COLOR][COLOR=#800080]148[/COLOR][COLOR=#000000];x[/COLOR][COLOR=#000000]++[/COLOR][COLOR=#000000]);
}
[/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000] led_Display(uchar KEY)
{

P5OUT[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000]BIT0;
P4OUT[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000] NUM_LED[KEY[/COLOR][COLOR=#000000]%[/COLOR][COLOR=#800080]10[/COLOR][COLOR=#000000]];
Delay_1ms([/COLOR][COLOR=#800080]8[/COLOR][COLOR=#000000]);

P5OUT[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000]BIT1;
P4OUT[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000] NUM_LED[KEY[/COLOR][COLOR=#000000]/[/COLOR][COLOR=#800080]10[/COLOR][COLOR=#000000]];
Delay_1ms([/COLOR][COLOR=#800080]8[/COLOR][COLOR=#000000]);

}

[/COLOR][COLOR=#0000ff]#pragma[/COLOR][COLOR=#000000] vector=PORT1_VECTOR[/COLOR][COLOR=#000000]
__interrupt [/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000] PORT1_ISR([/COLOR][COLOR=#0000ff]void[/COLOR][COLOR=#000000])
{

[/COLOR][COLOR=#0000ff]if[/COLOR][COLOR=#000000](P1IFG)
{
led_Display(scankey()); [color[/COLOR][COLOR=#000000]=[/COLOR][COLOR=#000000]#FF0000][/COLOR][COLOR=#008000]//[/COLOR][COLOR=#008000]在这里数码管才实时监测，不明白为什么我放在main。c的while（1）中就不可以，没反应[/color]。[/COLOR][COLOR=#008000]
[/COLOR][COLOR=#000000] P1IFG[/COLOR][COLOR=#000000]&=~[/COLOR][COLOR=#800080]0X08[/COLOR][COLOR=#000000];

}

}
[/COLOR]

我个人觉得有按键的话产生了中断，就只执行一次的啊，为什么中断里面的可以实时运行，while（1）中的不可以呢，？
小弟对中断不是很明白大侠们帮帮

微控网感谢您的参与

gujiao

2011-09-27 08:52:38
引用
只看此人

2楼

积分15
经验505
文章16
注册2011-09-08

你做的是矩阵键盘扫描吧！你可以看看帖子：[URL=http://www.microcontrol.cn/bbs/a/a.asp?B=100&ID=33244][COLOR=#000000]分享个MSP430矩阵键盘反转扫描程序[/COLOR][/URL]，可能对你有帮助。不一定要采用中断方式呀！

MSP430忠实粉丝！

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