onewire 1-wire ds18x20 ds2450 multi-channel
Diff: DS18X20.h
- Revision:
- 0:8c4e1841eb30
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DS18X20.h Fri Mar 02 08:29:49 2012 +0000 @@ -0,0 +1,65 @@ +/* DS18X20 specific values (see datasheet www.maxim-ic.com/datasheet/index.mvp/id/2812) */ +#ifndef _DS18X20_ +#define _DS18X20_ +#define DS18S20_ID 0x10 +#define DS18B20_ID 0x28 + +#define DS18X20_POWER_PARASITE 0x00 +#define DS18X20_POWER_EXTERN 0x01 +#define DS18X20_CONVERT_T 0x44 +#define DS18X20_READ 0xBE +#define DS18X20_WRITE 0x4E +#define DS18X20_EE_WRITE 0x48 +#define DS18X20_EE_RECALL 0xB8 +#define DS18X20_READ_POWER_SUPPLY 0xB4 + +#define DS18X20_OK 0x00 +#define DS18X20_ERROR 0x01 +#define DS18X20_START_FAIL 0x02 +#define DS18X20_ERROR_CRC 0x03 + +#define DS18B20_CONF_REG 4 +#define DS18B20_9_BIT 0 +#define DS18B20_10_BIT (1<<5) +#define DS18B20_11_BIT (1<<6) +#define DS18B20_12_BIT ((1<<6)|(1<<5)) + +// indefined bits in LSB if 18B20 != 12bit +#define DS18B20_9_BIT_UNDF ((1<<0)|(1<<1)|(1<<2)) +#define DS18B20_10_BIT_UNDF ((1<<0)|(1<<1)) +#define DS18B20_11_BIT_UNDF ((1<<0)) +#define DS18B20_12_BIT_UNDF 0 + +// conversion times in ms +#define DS18B20_TCONV_12BIT 750 +#define DS18B20_TCONV_11BIT DS18B20_TCONV_12_BIT/2 +#define DS18B20_TCONV_10BIT DS18B20_TCONV_12_BIT/4 +#define DS18B20_TCONV_9BIT DS18B20_TCONV_12_BIT/8 +#define DS18S20_TCONV DS18B20_TCONV_12_BIT + +// constant to convert the fraction bits to cel*(10^-4) +#define DS18X20_FRACCONV 625 + +#define DS18X20_SP_SIZE 9 + +// DS18X20 EEPROM-Support +#define DS18X20_WRITE_SCRATCHPAD 0x4E +#define DS18X20_COPY_SCRATCHPAD 0x48 +#define DS18X20_RECALL_E2 0xB8 +#define DS18X20_COPYSP_DELAY 10 /* ms */ +#define DS18X20_TH_REG 2 +#define DS18X20_TL_REG 3 + +void DS18X20_show_temp(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits,char *text); +float DS18X20_temp(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits); +uint8_t DS18X20_get_power_status(uint8_t id[]); +uint8_t DS18X20_get_power_status(uint8_t n,uint8_t id[]); +uint8_t DS18X20_start_meas( uint8_t with_external, uint8_t id[]); +uint8_t DS18X20_start_meas(uint8_t n, uint8_t with_external, uint8_t id[]); +uint8_t DS18X20_read_meas(uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits); +uint8_t DS18X20_read_meas(uint8_t n, uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits); +uint8_t DS18X20_read_meas_single(uint8_t familycode, uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits); +uint8_t DS18X20_meas_to_cel( uint8_t fc, uint8_t *sp, uint8_t* subzero, uint8_t* cel, uint8_t* cel_frac_bits); +uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits); +int8_t DS18X20_temp_cmp(uint8_t subzero1, uint16_t cel1, uint8_t subzero2, uint16_t cel2); +#endif \ No newline at end of file