单片机波形发生器报告_课程设计报告(编辑修改稿)内容摘要:

~+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 C08 3 2 图 8 DAC0832 芯片图 ( 3) LM339 芯片 LM339 引脚图 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)一位共阳极数码管 由于单片机的 P0 口带负载的能力不高,所以连接数码管的时候要接上上拉电阻提高负载能力。 具体解法: 连 a; 连 b; 连 c; 连 d; 连 e; 连 f; 连 g; 连 h(或 dp) 至于 8 两个脚是内部相连的,接 VCC。 引脚图如右图: 4 软件设计 ( 1) 程序流程图: ( 2)键盘扫描系统流程图: 5 (3) 源代码清单 include define uchar unsigned char define uint unsigned int sbit s1=P1^0。 //P1 口内部自带上拉电阻,因此外部的轻触按键要接地 sbit s2=P1^1。 //当按下按键时, P1 口输入 0,检测出是哪个按键按下 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]=//正弦波的数字量表 { 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, 0x16,0x18。
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