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| //Jan Chroust 15.4.2013 |
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| #include "C:\Users\Honza\Documents\pic\I2C_altimet\main.h" |
| |
| #define EEPROM_SDA PIN_B0 |
| #define EEPROM_SCL PIN_B1 |
| #use i2c(master, sda=EEPROM_SDA, scl=EEPROM_SCL) |
| #use rs232(baud=9600,parity=N,xmit=PIN_B3,rcv=PIN_B2,bits=8) //rcv TXD xmit RXD |
| |
| #define MPL3115_ADDR_R 0xC1 //addresa pro cteni |
| #define MPL3115_ADDR_W 0xC0 |
| |
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| void mpl3115_setA (void) //nastavení pro výku |
| { |
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| i2c_start(); //STANDBY mode |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(0x26); |
| I2C_write(0xB8); |
| i2c_stop(); |
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| i2c_start(); //PT_DATA_CFG set |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(0x13); |
| I2C_write(0x07); //hodnota |
| i2c_stop(); |
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| i2c_start(); //ACTIVE mode |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(0x26); |
| I2C_write(0xB9); |
| i2c_stop(); |
| } |
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| void mpl3115_setP (void) //nastavení pro tlak |
| { |
| |
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| i2c_start(); //STANDBY mode |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(0x26); |
| I2C_write(0xB8); |
| i2c_stop(); |
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| i2c_start(); //PT_DATA_CFG set |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(0x13); |
| I2C_write(0x07); //hodnota |
| i2c_stop(); |
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| i2c_start(); //ACTIVE mode |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(0x26); |
| I2C_write(0x39); |
| i2c_stop(); |
| } |
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| byte mpl3115_read (byte reg) |
| { |
| byte i; |
| |
| i2c_start(); |
| I2C_Write(MPL3115_ADDR_W); |
| I2C_write(reg); |
| i2c_start(); |
| I2C_Write(MPL3115_ADDR_R); |
| i=i2c_read(0); |
| i2c_stop(); |
| |
| return i; |
| } |
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| float mpl3115_T (void) //teplota ve stupnich |
| { |
| int m; |
| float l, t; |
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| m= mpl3115_read (0x04); |
| l= (float)(mpl3115_read(0x05)>>4)/16.0; |
| t = (float)(M + L); |
| return t; |
| } |
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| float mpl3115_A (void) //vyska v m |
| { |
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| int16 m, c; |
| float l, a; |
| |
| m= mpl3115_read (0x01); |
| c= mpl3115_read (0x02); |
| l= (float)(mpl3115_read(0x03)>>4)/16.0; |
| a = (float)((m << 8)|c) + l; |
| return a; |
| } |
| |
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| float mpl3115_P (void) //tlak v Pa |
| { |
| unsigned int32 m; |
| unsigned int16 c; |
| unsigned int l; |
| float p, l1; |
| |
| m= mpl3115_read (0x01); |
| c= mpl3115_read (0x02); |
| l=mpl3115_read(0x03); |
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| l1= (float)(l>>4)/4.0; |
| p = (float)((m << 10)|(c<<2)|(l>>6)) + l1; |
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| return p; |
| } |
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| void main() |
| { |
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| float p, t, a; |
| printf("Tlakomer nebo vyskomer \r\n",); |
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| while(TRUE) |
| { |
| mpl3115_setP(); //nastaveni pro tlak a teplotu |
| delay_ms (500); |
| t=mpl3115_T(); |
| p=mpl3115_P(); |
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| mpl3115_setA(); //nastaveni pro vysku a teplotu |
| delay_ms (500); |
| a=mpl3115_A(); |
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| printf("Teplota: %10.4f(stupne)\r\n", t); |
| printf("Tlak: %10.4f(Pa)\r\n", p); |
| printf("Výka: %10.4f(m)\r\n", a); |
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| delay_ms (1000); |
| } |
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| } |
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