EEPW论坛

#define DS_SCL BIT4 //DS_SCL = P5.4 #define DS_SDA BIT6 //DS_SDA = P2.6 #define DS_SCL_IN P5DIR &= ~DS_SCL #define DS_SCL_OUT P5DIR |= DS_SCL #define DS_SCL0 P5OUT &= ~DS_SCL #define DS_SCL1 P5OUT |= DS_SCL #define DS_SDA_IN P2DIR &= ~DS_SDA #define DS_SDA_OUT P2DIR |= DS_SDA #define DS_SDA0 P2OUT &= ~DS_SDA #define DS_SDA1 P2OUT |= DS_SDA #define DS_SDA_BIT P2IN & DS_SDA void Init_CLK(void) { unsigned int i; BCSCTL1 &= ~XTS; do{ IFG1 &= ~OFIFG; for(i=0xFF;i>0;i--); } while((IFG1 & OFIFG)!=0); BCSCTL2 |= SELS+SELM1; _EINT(); P5SEL|=0x30; DS_SCL_OUT; //SCLK对应的IO设置为输出状态 P2DIR&=0xbf; P2OUT|=BIT6; DS_SCL0; //SCLK=0 delay_us(5); } void DS3231_Write(u8 write_address,u8 write_data) { u8 Device_Address = 0xD0; //DS3231写设备地址 iic_Start(); //开始 iic_SendByte(Device_Address); //发送设备地址 iic_Ack(); iic_SendByte(write_address); //发送地址 iic_Ack(); //应答 iic_SendByte(write_data); //发送数据 iic_Ack(); //应答 iic_Stop(); //停止 } u8 DS3231_Read(u8 read_address) { u8 Receive_Data; //数据接收 u8 Device_Address = 0xD0; //DS3231写设备地址 iic_Start(); //开始 iic_SendByte(Device_Address); //发送设备地址 iic_Ack(); //应答 iic_SendByte(read_address); //发送地址 iic_Ack(); //应答 iic_Start(); //重复开始 Device_Address = 0xD1; //DS3231读设备地址 iic_SendByte(Device_Address); //发送地址 iic_Ack(); //应答 iic_in(); Receive_Data = iic_ReceiveByte(); //接收数据 iic_out(); iic_NAck(); //不应答 iic_Stop(); //停止 return Receive_Data; //返回数据 } void delay_us(u8 time) { for(int i=0;i