51單片機和dac0832輸出方波、矩形波和正弦波由液晶1602顯示的c語言程序(存儲版)
【正文】 夠嗎 ??? if(key==0) //確實有按鍵按下而引發(fā)中斷 { keytemp=P3amp。 if(waveform==0) sine_out()。 //設(shè)置外部中斷 0 為下降沿觸發(fā) ET0=1。 //在第二行顯示 } /********************1602 液晶函數(shù)聲明結(jié)束 *********************/ void main() { uchar i=0。 //使液晶顯示點陣，為下面做準備 write_(0x0c)。num16。 delay(5)。 lcd_ports=。 else DAdata=0x00。 if(wavecount64) wavecount=0。 uchar code sine_tab[256]={ //輸出電壓從 0 到最大值（正弦波 1/4 部分） 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, //輸出電壓從最大值到 0（正弦波 1/4 部分） 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, //輸出電壓從 0 到最小值（正弦波 1/4 部分） 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
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