Diff: onewire.h

Revision:

0:1197076b78f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/onewire.h	Mon May 10 08:14:32 2010 +0000
@@ -0,0 +1,101 @@
+typedef unsigned char BYTE;
+
+
+#define MAXSENSORS 8
+// rom-code size including CRC
+#define OW_ROMCODE_SIZE 8
+
+
+
+
+BYTE ow_reset(void);
+BYTE ow_rom_search( BYTE diff, BYTE *id );
+void ow_command( BYTE command, BYTE *id );
+//void DS18X20_find_sensor(BYTE *diff, BYTE id[]);
+BYTE DS18X20_get_power_status(uint8_t id[]);
+
+extern void DS18X20_show_id_uart( uint8_t *id, size_t n );
+extern void DS18X20_find_sensor(uint8_t *diff, uint8_t id[]);    
+extern uint8_t    DS18X20_get_power_status(uint8_t id[]);
+extern uint8_t DS18X20_start_meas( uint8_t with_external, uint8_t id[]);
+extern uint8_t DS18X20_read_meas(uint8_t id[], uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
+extern uint8_t DS18X20_read_meas_single(uint8_t familycode, uint8_t *subzero, uint8_t *cel, uint8_t *cel_frac_bits);
+extern uint8_t DS18X20_meas_to_cel( uint8_t fc, uint8_t *sp, uint8_t* subzero, uint8_t* cel, uint8_t* cel_frac_bits);
+extern uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits);
+extern int8_t DS18X20_temp_cmp(uint8_t subzero1, uint16_t cel1, uint8_t subzero2, uint16_t cel2);
+
+
+extern void ow_parasite_enable(void);
+extern void ow_parasite_disable(void);
+
+#define DEBUG 1
+
+#define ONEWIRE_PIN  p12
+
+
+#define OW_MATCH_ROM    0x55
+#define OW_SKIP_ROM     0xCC
+#define OW_SEARCH_ROM    0xF0
+
+
+#define OW_SHORT_CIRCUIT  0xFF
+#define OW_SEARCH_FIRST    0xFF        // start new search
+#define OW_PRESENCE_ERR    0x01
+#define OW_DATA_ERR     0xFE
+#define OW_LAST_DEVICE    0x00        // last device found
+//            0x01 ... 0x40: continue searching
+
+// rom-code size including CRC
+#define OW_ROMCODE_SIZE 8
+
+
+#define DS18X20_POWER_PARASITE 0x00
+#define DS18X20_POWER_EXTERN   0x01
+
+/* DS18X20 specific values (see datasheet) */
+#define DS18S20_ID 0x10
+#define DS18B20_ID 0x28
+#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