Rev Author Line No. Line
1045 jacho 1 //Knihovna pro senzor HMC5883L
2 //(c) Jan Chroust 2013
3  
4  
960 jacho 5 void set_mag (void) //uvodni nastaveni na kontinualni mereni, rozsah ± 8.1 Ga, frekvence mereni 15HZ
6 {
7 i2c_start(); //nastavení Configuration Register A
8 I2C_Write(MAG_ADDR_W);
9 I2C_Write(0x00);
10 I2C_Write(0x70);
11 i2c_stop();
12 Delay_ms(6);
13  
14 i2c_start(); //nastavení Configuration Register B
15 I2C_Write(MAG_ADDR_W);
16 I2C_Write(0x01);
17 I2C_Write(MAG_ROZ810);
18 i2c_stop();
19  
20 Delay_ms(6);
21  
22 i2c_start(); //nastveni Mode Register
23 I2C_Write(MAG_ADDR_W);
24 I2C_Write(0x02);
25 I2C_Write(0x00);
26 i2c_stop();
27 Delay_ms(6);
28 }
29  
30 void set_mag_roz (unsigned int8 h) //nastavy rozsah
31 {
32  
33 //
34  
35  
36 i2c_start();
37 I2C_Write(MAG_ADDR_W);
38 I2C_Write(0x01);
39 I2C_Write(h);
40 i2c_stop();
41  
42 Delay_ms(6);
43  
44  
45 }
46  
47  
48 byte mag_read(byte reg) //pro cteni reg
49 {
50  
51 i2c_start();
52 I2C_Write(MAG_ADDR_W);
53 I2C_write(reg);
54 i2c_stop();
55 i2c_start();
56 I2C_Write(MAG_ADDR_R);
57 reg=i2c_read(0);
58 return reg;
59 }
60  
61  
62 signed int16 mag_vypocet(unsigned int8 h, unsigned int8 l) //prepocet na 16bit cislo
63 {
64 signed int16 x;
65 x = (((unsigned int16) h << 8) + l );
66 return x;
67 }
68  
69  
70 signed int16 mag_readX(void) //nacteni osy x
71 {
72 unsigned int8 h,l;
73 signed int16 x;
74 h=mag_read(0x03);
75 l=mag_read(0x04);
76 x=mag_vypocet(h,l);
77 return x;
78  
79 }
80  
81  
82 signed int16 mag_readY(void) //nacteni osy x
83 {
84 unsigned int8 h,l;
85 signed int16 x;
86 h=mag_read(0x07);
87 l=mag_read(0x08);
88 x=mag_vypocet(h,l);
89 return x;
90  
91 }
92  
93  
94 signed int16 mag_readZ(void) //nacteni osy x
95 {
96 unsigned int8 h,l;
97 signed int16 x;
98 h=mag_read(0x05);
99 l=mag_read(0x06);
100 x=mag_vypocet(h,l);
101 return x;
102  
103 }
104  
105