單片機(jī)波形發(fā)生器報(bào)告_課程設(shè)計(jì)報(bào)告(編輯修改稿)
2024-09-15 14:18 本頁面
【文章內(nèi)容簡介】 ~+15V）。 GND：地。 2 V RE F8G ND3V C C20CS1W R 12DI 34DI 25DI 16D1 07RF B9G ND10IO UT 111IO UT 212DI 713DI 614DI 515DI 416X F E R17W R 218IL E (B Y 1 /B Y 2 )19U1DA C0 8 3 2 圖 8 DAC0832 芯片圖 （ 3） LM339 芯片 LM339 引腳圖 These parators are designed for use in level detection, low–level sensing and memory applications in consumer automotive and industrial 3 electronic applications. ? Single or Split Supply Operation ? Low Input Bias Current: 25 nA (Typ) ? Low Input Offset Current: 177。 nA (Typ) ? Low Input Offset Voltage: 177。 mV (Typ) LM139A Series ? Input Common Mode Voltage Range to Gnd ? Low Output Saturation Voltage: 130 mV (Typ) @ mA ? TTL and CMOS Compatible ? ESD Clamps on the Inputs Increase Reliability without Affecting Device Operation (4)一位共陽極數(shù)碼管 由于單片機(jī)的 P0 口帶負(fù)載的能力不高，所以連接數(shù)碼管的時(shí)候要接上上拉電阻提高負(fù)載能力。具體解法： 連 a； 連 b； 連 c； 連 d； 連 e； 連 f； 連 g； 連 h（或 dp） 至于 8 兩個(gè)腳是內(nèi)部相連的，接 VCC。 引腳圖如右圖： 4 軟件設(shè)計(jì) （ 1） 程序流程圖： （ 2）鍵盤掃描系統(tǒng)流程圖： 5 (3) 源代碼清單 include define uchar unsigned char define uint unsigned int sbit s1=P1^0。//P1 口內(nèi)部自帶上拉電阻，因此外部的輕觸按鍵要接地 sbit s2=P1^1。//當(dāng)按下按鍵時(shí)， P1 口輸入 0，檢測出是哪個(gè)按鍵按下 6 sbit s3=P1^2。// sbit s4=P1^3。 sbit s5=P1^4。 sbit s6=P1^5。 sbit s7=P1^6。 sbit s8=P1^7。 uint d1,d2。 uint s,p。 uint n。 uchar code sintab[256]=//正弦波的數(shù)字量表 { 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, 7 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, 0x16,0x1
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