shtxx.h

来自「SHT11温湿传感器+AVR 单片机MEGA16程序」· C头文件 代码 · 共 45 行

#ifndef _SHTXX_H
#define _SHTXX_H
#include "config.h"

#define SHTXX_SCK_DDR		DDRC
#define SHTXX_SCK_PORT		PORTC
#define SHTXX_SCK_BIT		(0)

#define SHTXX_DAT_DDR		DDRC
#define SHTXX_DAT_PORT		PORTC
#define SHTXX_DAT_PIN		PINC
#define SHTXX_DAT_BIT		(1)

#define SHTXX_SCK_HIGH()	{BITSET(SHTXX_SCK_DDR, SHTXX_SCK_BIT); BITSET(SHTXX_SCK_PORT, SHTXX_SCK_BIT); _delay_us(10);}
#define SHTXX_SCK_LOW()		{BITSET(SHTXX_SCK_DDR, SHTXX_SCK_BIT); BITCLR(SHTXX_SCK_PORT, SHTXX_SCK_BIT); _delay_us(10);}

#define SHTXX_DAT_1()		{BITSET(SHTXX_DAT_DDR, SHTXX_DAT_BIT); _delay_us(1); BITSET(SHTXX_DAT_PORT, SHTXX_DAT_BIT); _delay_us(5);}
#define SHTXX_DAT_0()		{BITSET(SHTXX_DAT_DDR, SHTXX_DAT_BIT); _delay_us(1); BITCLR(SHTXX_DAT_PORT, SHTXX_DAT_BIT); _delay_us(5);}

#define SHTXX_START()		{SHTXX_DAT_1(); SHTXX_SCK_LOW(); SHTXX_SCK_HIGH(); SHTXX_DAT_0(); SHTXX_SCK_LOW(); _delay_us(2); SHTXX_SCK_HIGH(); SHTXX_DAT_1();  SHTXX_SCK_LOW();}
#define SHTXX_ACK()			{BITCLR(SHTXX_DAT_DDR, SHTXX_DAT_BIT); if(!(BITCHK(SHTXX_DAT_PIN, SHTXX_DAT_BIT)));}
#define SHTXX_WAIT()		{BITCLR(SHTXX_DAT_DDR, SHTXX_DAT_BIT); while(BITCHK(SHTXX_DAT_PIN, SHTXX_DAT_BIT));}

#define SHTXX_CMD_TEMPTURE	0b00000011
#define SHTXX_CMD_HUMIDITY	0b00000101
#define SHTXX_RD_STATE_REG	0b00000111
#define SHTXX_WR_STATE_REG	0b00000110
#define SHTXX_SOFT_RST		0b00011110

#define SHTXX_MODE_TEMP		0x01
#define SHTXX_MODE_HUMI		0x02

uint16 shtxx_temp, shtxx_humi;
uint8 shtxx_crc;
uint32 t_c, rh_true;
uint8 bcd32[10];

void shtxx_init(void);
void shtxx_reconnect(void);
uint8 shtxx_write_byte(uint8 cmd);
uint8 shtxx_softrst(void);
uint8 shtxx_read_byte(uint8 dat_crc);

#endif