蓝桥杯单片机开发板上的外设例程

#include <STC15F2K60S2.H> #include "intrins.h" sbit SDA = P2^1; /* 数据线 */ sbit SCL = P2^0; /* 时钟线 */ sbit SCK=P1^7; sbit IO=P2^3; sbit RST = P1^3; // DS1302复位 #define uchar unsigned char #define uint unsigned int #define DELAY_TIME 40 #define AT24C02_address 0xA0 bit IIC_WaitAck(void); void IIC_SendAck(bit ackbit); void IIC_Stop(void); void IIC_Start(void); void IIC_Delay(unsigned char i); unsigned char IIC_RecByte(void); void IIC_SendByte(unsigned char byt); void IIC_read(uchar hw_address,uchar reg_address); void IIC_write(uchar hw_address,uchar reg_address); unsigned char Read_Ds1302_Byte ( unsigned char address ); void Write_Ds1302_Byte( unsigned char address,unsigned char dat ); void Write_Ds1302(unsigned char temp); void get_time(void); void ds1302_init(void); void init(void); void SMG_output(void); void Delay1ms(void); uchar tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,\ 0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10,0xff,0xbf}; uchar SMG[8]={20,20,20,20,20,20,20,20}; uint move=0; uchar time[7]={0,0,0,0,0,0,0}; void main(void) { init(); // IIC_write(AT24C02_address,0x00);Delay1ms();Delay1ms();Delay1ms();Delay1ms();Delay1ms(); IIC_read(AT24C02_address,0x00); ds1302_init(); while(1) { get_time(); IIC_write(AT24C02_address,0x00); SMG[0]=time[2]/10;SMG[1]=time[2]%10; SMG[3]=time[1]/10;SMG[4]=time[1]%10; SMG[6]=time[0]/10;SMG[7]=time[0]%10; SMG_output(); } } void IIC_write(uchar hw_address,uchar reg_address) { uchar i; IIC_Start(); IIC_SendByte(hw_address&0xfe); IIC_WaitAck(); IIC_SendByte(reg_address); IIC_WaitAck(); for(i=0;i<3;i++) { IIC_SendByte(time[i]); IIC_WaitAck(); } IIC_Stop(); } void IIC_read(uchar hw_address,uchar reg_address) { uchar i; IIC_Start(); IIC_SendByte(hw_address&0xfe); IIC_WaitAck(); IIC_SendByte(reg_address); IIC_WaitAck(); IIC_Stop(); IIC_Start(); IIC_SendByte(hw_address|0x01); IIC_WaitAck(); for(i=0;i<3;i++) { time[i]=IIC_RecByte(); IIC_SendAck(0); } IIC_Stop(); } void ds1302_init(void) { uchar i,j=0x80; Write_Ds1302_Byte(0x8e,0x00); for(i=0;i<7;i++) { Write_Ds1302_Byte(j,time[i]); j +=2; } Write_Ds1302_Byte(0x8e,0x80); } void get_time(void) { uchar i,j=0x81; Write_Ds1302_Byte(0x8e,0x00); for(i=0;i<7;i++) { time[i]=Read_Ds1302_Byte(j); j +=2; } Write_Ds1302_Byte(0x8e,0x80); } void Write_Ds1302(unsigned char temp) { unsigned char i; for (i=0;i<8;i++) { SCK=0; IO=temp&0x01; temp>>=1; SCK=1; } } void Write_Ds1302_Byte( unsigned char address,unsigned char dat ) { RST=0; _nop_(); SCK=0; _nop_(); RST=1; _nop_(); Write_Ds1302(address); Write_Ds1302(((dat/10)<<4)|(dat%10)); RST=0; } unsigned char Read_Ds1302_Byte ( unsigned char address ) { unsigned char i,temp=0x00; RST=0; _nop_(); SCK=0; _nop_(); RST=1; _nop_(); Write_Ds1302(address); for (i=0;i<8;i++) { SCK=0; temp>>=1; if(IO) temp|=0x80; SCK=1; } RST=0; _nop_(); SCK=0; _nop_(); SCK=1; _nop_(); IO=0; _nop_(); IO=1; _nop_(); return (((temp/16)*10)+(temp%16)); } // void IIC_Delay(unsigned char i) { do{_nop_();} while(i--); } // void IIC_Start(void) { SDA = 1; SCL = 1; IIC_Delay(DELAY_TIME); SDA = 0; IIC_Delay(DELAY_TIME); SCL = 0; } // void IIC_Stop(void) { SDA = 0; SCL = 1; IIC_Delay(DELAY_TIME); SDA = 1; IIC_Delay(DELAY_TIME); } // void IIC_SendAck(bit ackbit) { SCL = 0; SDA = ackbit; IIC_Delay(DELAY_TIME); SCL = 1; IIC_Delay(DELAY_TIME); SCL = 0; SDA = 1; IIC_Delay(DELAY_TIME); } // bit IIC_WaitAck(void) { bit ackbit; SCL = 1; IIC_Delay(DELAY_TIME); ackbit = SDA; SCL = 0; IIC_Delay(DELAY_TIME); return ackbit; } // void IIC_SendByte(unsigned char byt) { unsigned char i; for(i=0; i<8; i++) { SCL = 0; IIC_Delay(DELAY_TIME); if(byt & 0x80) SDA = 1; else SDA = 0; IIC_Delay(DELAY_TIME); SCL = 1; byt <<= 1; IIC_Delay(DELAY_TIME); } SCL = 0; } // unsigned char IIC_RecByte(void) { unsigned char i, da; for(i=0; i<8; i++) { SCL = 1; IIC_Delay(DELAY_TIME); da <<= 1; if(SDA) da |= 1; SCL = 0; IIC_Delay(DELAY_TIME); } return da; } void init(void) { P2=(P2&0X1F)|0XA0; P0=0X00; P2=(P2&0X1F)|0X80; P0=0XFF; P2=(P2&0X1F)|0XC0; P0=0XFF; P2=(P2&0X1F)|0XE0; P0=0XFF; } void SMG_output(void) { uchar i; for(i=0;i<8;i++) { P2=(P2&0X1F)|0XC0; P0=(1 << i); P2=(P2&0X1F)|0XE0; P0=tab[SMG[i]]; Delay1ms(); } P2=(P2&0X1F)|0XC0; P0=0XFF; P2=(P2&0X1F)|0XE0; P0=0XFF; } void Delay1ms(void) //@11.0592MHz { unsigned char i, j; _nop_(); _nop_(); _nop_(); i = 11; j = 190; do { while (--j); } while (--i); }