STC89C52_HMC5983自测后工作程序.doc

/*/ HMC5883 IIC测试程序/ 使用单片机STC89C51 / 晶振：11.0592M/ 显示：串口/ 编译环境 Keil uVision5/2015/7/26/*#include #include #include #include #define uchar unsigned char#define uint unsigned int/*IIC定义*/sbitSCL=P12; /IIC时钟引脚定义sbitSDA=P13; /IIC数据引脚定义typedef unsigned short WORD;/*IIC定义*/*磁力计定义*/#define SlaveAddress0x3C /定义器件在IIC总线中的从地址(0x3c是写入的地址。7bit地址是0x1E)/*磁力计定义*/*串口定义*/unsigned char Bufer=hello n;typedef unsigned char BYTE;BYTE BUF6; /接收数据缓存区 uchar ge,shi,bai,qian,wan; /显示变量/*串口定义*/*函数声明*/延时void delay(unsigned int k);/串口void UART_init(void);void UART_send_byte(unsigned char dat);void UART_send_string(unsigned char *bufer);/转换void conversion(uint temp_data);/磁力计void Init_HMC5883(void); /初始化5883/IICvoid Single_Write_HMC5883(uchar REG_Address,uchar REG_data); /单个写入数据uchar Single_Read_HMC5883(uchar REG_Address); /单个读取内部寄存器数据void Multiple_Read_HMC5883(); /连续的读取内部寄存器数据void Delay5us();void Delay5ms();void HMC5883_Start();void HMC5883_Stop();void HMC5883_SendACK(bit ack);bit HMC5883_RecvACK();void HMC5883_SendByte(BYTE dat);BYTE HMC5883_RecvByte();void HMC5883_ReadPage();void HMC5883_WritePage();/*函数声明*/*函数定义*/UART初始化 波特率：9600void UART_init(void)SCON = 0x50; / 10位uart，允许串行接受 TMOD = 0x20; / 定时器1工作在方式2（自动重装） TH1 = 0xFD; TL1 = 0xFD; TR1 = 1;/UART 发送一字节void UART_send_byte(unsigned char dat)SBUF = dat;while (TI = 0);TI = 0;/UART 发送字符串void UART_send_string(unsigned char *bufer)while (*bufer != 0)UART_send_byte(*bufer+);/延时函数 void delay(unsigned int k)unsigned int i,j;for(i=0;ik;i+)for(j=0;j121;j+);/转换函数void conversion(uint temp_data) wan=temp_data/10000+0x30 ; temp_data=temp_data%10000; /取余运算qian=temp_data/1000+0x30 ; temp_data=temp_data%1000; /取余运算 bai=temp_data/100+0x30 ; temp_data=temp_data%100; /取余运算 shi=temp_data/10+0x30 ; temp_data=temp_data%10; /取余运算 ge=temp_data+0x30; /自测HMC5883 void Init_HMC5883() Single_Write_HMC5883(0x00,0x71);/Write CRA (00) send 0x3C 0x00 0x70 (8-average, 15 Hz default, normal measurement) Single_Write_HMC5883(0x01,0xA0);/Write CRB (01) send 0x3C 0x01 0xA0 (Gain=5, or any other desired gain) Single_Write_HMC5883(0x02,0x01);/Write Mode(02) send 0x3C 0x02 0x00 (Continuous-measurement mode)/离开自测HMC5883 void leave_HMC5883() Single_Write_HMC5883(0x00,0xF0);/Write CRA (00) send 0x3C 0x00 0x70 (8-average, 15 Hz default, normal measurement) Single_Write_HMC5883(0x01,0xA0);/Write CRB (01) send 0x3C 0x01 0xA0 (Gain=5, or any other desired gain) Single_Write_HMC5883(0x02,0x00);/Write Mode(02) send 0x3C 0x02 0x00 (Continuous-measurement mode)/*延时5微秒(STC90C52RC12M)不同的工作环境,需要调整此函数，注意时钟过快时需要修改当改用1T的MCU时,请调整此延时函数*/void Delay5us()_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();/* 延时5毫秒(STC90C52RC12M)不同的工作环境,需要调整此函数当改用1T的MCU时,请调整此延时函数*/void Delay5ms() WORD n = 560; while (n-);/ 起始信号void HMC5883_Start() SDA = 1; /拉高数据线 SCL = 1; /拉高时钟线 Delay5us(); /延时 SDA = 0; /产生下降沿 Delay5us(); /延时 SCL = 0; /拉低时钟线/停止信号void HMC5883_Stop() SDA = 0; /拉低数据线 SCL = 1; /拉高时钟线 Delay5us(); /延时 SDA = 1; /产生上升沿 Delay5us(); /延时/发送应答信号 入口参数:ack (0:ACK 1:NAK)void HMC5883_SendACK(bit ack) SDA = ack; /写应答信号 SCL = 1; /拉高时钟线 Delay5us(); /延时 SCL = 0; /拉低时钟线 Delay5us(); /延时/接收应答信号bit HMC5883_RecvACK() SCL = 1; /拉高时钟线 Delay5us(); /延时 CY = SDA; /读应答信号 SCL = 0; /拉低时钟线 Delay5us(); /延时 return CY;/向IIC总线发送一个字节数据void HMC5883_SendByte(BYTE dat) BYTE i; for (i=0; i8; i+) /8位计数器 dat = 1; /移出数据的最高位 SDA = CY; /送数据口 SCL = 1; /拉高时钟线 Delay5us(); /延时 SCL = 0; /拉低时钟线 Delay5us(); /延时 HMC5883_RecvACK();/从IIC总线接收一个字节数据BYTE HMC5883_RecvByte() BYTE i; BYTE dat = 0; SDA = 1; /使能内部上拉,准备读取数据, for (i=0; i8; i+) /8位计数器 dat = 1; SCL = 1; /拉高时钟线 Delay5us(); /延时 dat |= SDA; /读数据 SCL = 0; /拉低时钟线 Delay5us(); /延时 return dat;/单字节写入内部寄存器 void Single_Write_HMC5883(uchar REG_Address,uchar REG_data) HMC5883_Start(); /起始信号 HMC5883_SendByte(SlaveAddress); /发送设备地址+写信号 HMC5883_SendByte(REG_Address); /内部寄存器地址，请参考中文pdf HMC5883_SendByte(REG_data); /内部寄存器数据，请参考中文pdf HMC5883_Stop(); /发送停止信号/单字节读取内部寄存器uchar Single_Read_HMC5883(uchar REG_Address) uchar REG_data; HMC5883_Start(); /起始信号 HMC5883_SendByte(SlaveAddress); /发送设备地址+写信号 HMC5883_SendByte(REG_Address); /发送存储单元地址，从0开始 HMC5883_Start(); /起始信号 HMC5883_SendByte(SlaveAddress+1); /发送设备地址+读信号 REG_data=HMC5883_RecvByte(); /读出寄存器数据HMC5883_SendACK(1); HMC5883_Stop(); /停止信号 return REG_data; /连续读出HMC5883内部角度数据void Multiple_read_HMC5883(void) uchar i; HMC5883_Start(); /起始信号 HMC5883_SendByte(SlaveAddress); /发送设备地址+写信号 HMC5883_SendByte(0x03); /发送存储单元地址，从0x3开始 HMC5883_Start(); /起始信号 HMC5883_SendByte(SlaveAddress+1); /发送设备地址+读信号 for (i=0; i6; i+) /连续读取6个地址数据，存储中BUF BUFi = HMC5883_RecvByte(); /BUF0存储数据 if (i = 5) HMC5883_SendACK(1); /最后一个数据需要回NOACK else HMC5883_SendACK(0); /回应ACK HMC5883_Stop(); /停止信号 Delay5ms();/*主程序*/void main() unsigned int i;int x,y,z;double angle;delay(500);UART_init();Init_HMC5883();delay(600);BUF0 = Single_Read_HMC5883(0x03);BUF1 = Single_Read_HMC5883(0x04);BUF2 = Single_Read_HMC5883(0x05);BUF3 = Single_Read_HMC5883(0x06);BUF4 = Single_Read_HMC5883(0x07);BUF5 = Single_Read_HMC5883(0x08);x=BUF0 8 | BUF1; /Combine MSB and LSB of X Data output registerz=BUF2 8 | BUF3; /Combine MSB and LSB of Z Data output registery=BUF4 8 | BUF5; /Combine MSB and LSB of Y Data output registerangle= atan2(double)y,(double)x) * (180 / 3.14159265) + 180; / angle in degreesangle*=10;conversion(angle); /计算数据和显示Bufer0=(qian=,qian); Bufer1=(bai=,bai); Bufer2=(shi=,shi); Bufer3=(.); Bufer4=(ge=,ge); Bufer5=(,); UART_send_string(Bufer);for (i=0;i10000;i+); /延时 UART_send_string(Bufer);for (i=0;i10000;i+); /延时 UART_send_string(Bufer);for (i=0;i10000;i+); /延时 UART_send_str