智能车制作
标题:
单片机 da(pcf8591)输出一个正弦波 为什么顶部失真 大神求解啊 感激 感激 感激
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作者:
╱/惔...
时间:
2014-2-22 21:04
标题:
单片机 da(pcf8591)输出一个正弦波 为什么顶部失真 大神求解啊 感激 感激 感激
查表法给pcf8591送数据
uchar code sintable[]={0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,
0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,
0xbc,0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,
0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,
0xea,0xec,0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,
0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,
0xf5,0xf4,0xf2,0xf1,0xef,0xee,0xec,0xea,0xe9,0xe7,
0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,
0xcf,0xcc,0xca,0xc7,0xc5,0xc2,0xbf,0xbc,0xba,0xb7,
0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99,
0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,0x80,0x7c,
0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,
0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,0x40,
0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,
0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16,0x15,0x13,
0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,
0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02 ,
0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,
0x0d,0x0e,0x10,0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,
0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,
0x35,0x38,0x3a,0x3d,0x40,0x43,0x45,0x48,0x4c,0x4e ,
0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,
0x6f,0x72,0x76,0x79,0x7c,0x80 };
送数据程序如下
while(1)
{
for(i=0;i<256;i++)
{
Pcf8591shuchuDA(sintable
);
delay_lcd(10);
}
示波器显示如图
[attach]56039[/attach]
全部程序见附件[attach]56040[/attach]
作者:
huang91
时间:
2014-2-22 21:36
[attach]56059[/attach]
作者:
╱/惔...
时间:
2014-2-23 09:16
huang91 发表于 2014-2-22 21:36
删了也不管用啊 0xff与0x00都是12个 但下面显示完好 不知咋的上面就成那样了
作者:
dingyongbin
时间:
2014-3-16 10:48
扣扣扣
作者:
dingyongbin
时间:
2014-3-20 14:35
????
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