Texas Instruments MSP430

343
unsigned char onewire_reset(void);
void onewire_write_bit(unsigned char bit_value);
unsigned char onewire_read_bit(void);
void onewire_write(unsigned char value);
unsigned char onewire_read(void);
one_wire.c
#include "one_wire.h"
unsigned char onewire_reset(void)
{
unsigned char res = FALSE;
DS18B20_OUTPUT();
DS18B20_OUT_LOW();
delay_us(480);
DS18B20_OUT_HIGH();
delay_us(60);
DS18B20_INPUT();
res = DS18B20_IN();
delay_us(480);
return res;
}
void onewire_write_bit(unsigned char bit_value)
{
DS18B20_OUTPUT();
DS18B20_OUT_LOW();
if(bit_value)
{
delay_us(104);
DS18B20_OUT_HIGH();
}
}
unsigned char onewire_read_bit(void)
{
DS18B20_OUTPUT();
DS18B20_OUT_LOW();
DS18B20_OUT_HIGH();
delay_us(15);
DS18B20_INPUT();
return(DS18B20_IN());
}
void onewire_write(unsigned char value)
{
unsigned char s = 0;