Reinhold Schaefer
one wire driver
Dependents: 09_PT1000 10_PT1000 11_PT1000
Diff: DS2482.h
- Revision:
- 0:c57706d25cf0
- Child:
- 1:0950824b1ca3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DS2482.h Sat Apr 27 18:56:53 2013 +0000
@@ -0,0 +1,221 @@
+// \file ds2482x_app.h \brief Dallas DS2482 I2C-to-Dallas1Wire Master Library.
+//*****************************************************************************
+// Target MCU : Atmel AVR Series
+//*****************************************************************************
+//
+
+#ifndef DS2482_H
+#define DS2482_H
+
+ #include "mbed.h"
+
+ #define OW_MASTER_START 1
+
+ // constants/macros/typdefs
+ #define OW_I2C_DEVICE 0x30 // < Change this to the address of your 1-Wire master
+
+ #define FALSE 0
+ #define TRUE 1
+
+ #define NAK 0
+ #define ACK 1
+
+ #define I2C_READ 1
+ #define I2C_WRITE 0
+
+ #define POLL_LIMIT 200
+
+ // Maximale Anzahl der Bausteine am Bus
+ #define OW_MAX_DEVICES 16
+ #define OW_SECOND_PORT 8
+
+ // Memory definitions
+ #define OW_SCRATCHPAD_BYTES 9
+ #define OW_ROM_CODE_BYTES 8
+ #define OW_CRC_BYTE 8
+
+
+ //-----------------------------------------------------------------------------
+
+ // Commands
+ #define OW_CMD_SEARCH_ROM 0xF0 // Command Search ROM code
+ #define OW_CMD_READ_ROM 0x33 // Command Read ROM code
+ #define OW_CMD_MATCH_ROM 0x55 // Command Match ROM code
+ #define OW_CMD_SKIP_ROM 0xCC // Command Skip ROM code
+ #define OW_CMD_ALARM_SEARCH 0xEC // Command Alarm Search
+
+ #define OW_CMD_CONVERT_T 0x44 // Command Initiate temperature conversion
+ #define OW_CMD_WRITE_SCRATCHPAD 0x4E // Command Write scratchpad
+ #define OW_CMD_READ_SCRATCHPAD 0xBE // Command Read scratchpad
+ #define OW_CMD_COPY_SCRATCHPAD 0x48 // Command Copy scratchpad
+ #define OW_CMD_RECALL_EE 0xB8 // Command Recall Th and Tl from EEPROM
+ #define OW_CMD_READ_POWER_SUPPLY 0xB4 // Command Signal power supply mode
+
+ // Error codes
+ #define OW_RESET_ERROR BIT0
+ #define OW_CRC_ERROR BIT1
+
+ // DS2482 command defines
+ #define DS2482_CMD_DRST 0xF0 //< DS2482 Device Reset
+ #define DS2482_CMD_WCFG 0xD2 //< DS2482 Write Configuration
+ #define DS2482_CMD_CHSL 0xC3 //< DS2482 Channel Select
+ #define DS2482_CMD_SRP 0xE1 //< DS2482 Set Read Pointer
+ #define DS2482_CMD_1WRS 0xB4 //< DS2482 1-Wire Reset
+ #define DS2482_CMD_1WWB 0xA5 //< DS2482 1-Wire Write Byte
+ #define DS2482_CMD_1WRB 0x96 //< DS2482 1-Wire Read Byte
+ #define DS2482_CMD_1WSB 0x87 //< DS2482 1-Wire Single Bit
+ #define DS2482_CMD_1WT 0x78 //< DS2482 1-Wire Triplet
+
+ // DS2482 status register bit defines
+ #define DS2482_STATUS_1WB 0x01 //< DS2482 Status 1-Wire Busy
+ #define DS2482_STATUS_PPD 0x02 //< DS2482 Status Presence Pulse Detect
+ #define DS2482_STATUS_SD 0x04 //< DS2482 Status Short Detected
+ #define DS2482_STATUS_LL 0x08 //< DS2482 Status 1-Wire Logic Level
+ #define DS2482_STATUS_RST 0x10 //< DS2482 Status Device Reset
+ #define DS2482_STATUS_SBR 0x20 //< DS2482 Status Single Bit Result
+ #define DS2482_STATUS_TSB 0x40 //< DS2482 Status Triplet Second Bit
+ #define DS2482_STATUS_DIR 0x80 //< DS2482 Status Branch Direction Taken
+
+ // DS2482 configuration register bit defines
+ #define DS2482_CFG_APU 0x01 //< DS2482 Config Active Pull-Up
+ #define DS2482_CFG_PPM 0x02 //< DS2482 Config Presence Pulse Masking
+ #define DS2482_CFG_SPU 0x04 //< DS2482 Config Strong Pull-Up
+ #define DS2482_CFG_1WS 0x08 //< DS2482 Config 1-Wire Speed
+
+ // DS2482 channel selection code defines
+ #define DS2482_CH_IO0 0xF0 //< DS2482 Select Channel IO0
+ #define DS2482_CH_IO1 0xE1 //< DS2482 Select Channel IO1
+ #define DS2482_CH_IO2 0xD2 //< DS2482 Select Channel IO2
+ #define DS2482_CH_IO3 0xC3 //< DS2482 Select Channel IO3
+ #define DS2482_CH_IO4 0xB4 //< DS2482 Select Channel IO4
+ #define DS2482_CH_IO5 0xA5 //< DS2482 Select Channel IO5
+ #define DS2482_CH_IO6 0x96 //< DS2482 Select Channel IO6
+ #define DS2482_CH_IO7 0x87 //< DS2482 Select Channel IO7
+
+ // DS2482 read pointer code defines
+ #define DS2482_READPTR_SR 0xF0 //< DS2482 Status Register
+ #define DS2482_READPTR_RDR 0xE1 //< DS2482 Read Data Register
+ #define DS2482_READPTR_CSR 0xD2 //< DS2482 Channel Selection Register
+ #define DS2482_READPTR_CR 0xC3 //< DS2482 Configuration Register
+
+
+ // API mode bit flags
+ #define MODE_STANDARD 0x00
+ #define MODE_OVERDRIVE 0x01
+ #define MODE_STRONG 0x02
+
+ // One Wire
+ #define OW_MATCH_ROM 0x55
+ #define OW_SKIP_ROM 0xCC
+ #define OW_CONVERT_TEMP 0x44
+ #define OW_WR_SCRATCHPAD 0x4E
+ #define OW_RD_SCRATCHPAD 0xBE
+ #define OW_SEARCH_ROM 0xF0
+
+ // ROM code structure
+ typedef struct sOW_ROM_CODE_ITEM
+ {
+ uint8_t adr; // Adresse für den Baustein
+ uint8_t status; // Status für den Wandler
+ // bit 8 ist für Buskennung
+ uint16_t result; // Ablage für Temperaturwert
+ uint16_t value_1; // Ablage für Stromwert
+ uint16_t value_2; // Ablage für Spannungwert
+ uint8_t rom[8]; // 8 Bytes for ROM code
+ } tOW_ROM_CODE_ITEM;
+
+
+ typedef struct sOW
+ {
+ uint8_t devices; // Number of devices
+ uint8_t bus; // Bus 0 oder 1
+ uint8_t device_table_index;
+ tOW_ROM_CODE_ITEM device_table[OW_MAX_DEVICES]; // OW-Device data table
+ } tOW;
+
+ // ============================================================================
+
+ class DS2482
+ {
+
+ public:
+
+ /** Create an instance of the PCF8574 connected to specfied I2C pins, with the specified address.
+ *
+ * @param sda The I2C data pin
+ * @param scl The I2C clock pin
+ * @param address The I2C address for this DS2482
+ */
+
+ DS2482(PinName sda, PinName scl, int address);
+
+ uint8_t crc_calc(uint8_t x);
+ //-----------------------------------------------------------------------------
+ // functions
+
+ uint8_t detect(void);
+ int reset(void);
+ uint8_t write_config(uint8_t config);
+
+ //uint8_t DS2482_channel_select(uint8_t channel);
+ uint8_t OWReset(void);
+ void OWWriteBit(uint8_t sendbit);
+ uint8_t OWReadBit(void);
+ uint8_t OWTouchBit(uint8_t sendbit);
+ void OWWriteByte(uint8_t sendbyte);
+ uint8_t OWReadByte(void);
+ void OWBlock(uint8_t *tran_buf, uint8_t tran_len);
+ uint8_t OWTouchByte(uint8_t sendbyte);
+ uint8_t OWFirst(void);
+ uint8_t OWNext(void);
+ int OWVerify(void);
+ void OWTargetSetup(uint8_t family_code);
+ void OWFamilySkipSetup(void);
+ uint8_t OWSearch(void);
+ uint8_t search_triplet(uint8_t search_direction);
+ uint8_t OWSpeed(uint8_t new_speed);
+ uint8_t OWLevel(uint8_t new_level);
+ uint8_t OWReadBitPower(uint8_t applyPowerResponse);
+ uint8_t OWWriteBytePower(uint8_t sendbyte);
+
+/*
+ void DS18XX_Read_Address(void);
+ void DS2482_start_conversion(void);
+
+
+*/
+ protected:
+/*
+ BOOL ow_read_rom(void);
+ BOOL ow_read_scratchpad(void);
+ BOOL ow_read_scratchpad_ds2438(uint8_t page);
+ BOOL ow_write_scratchpad_ds18x20 (uint8_t th, uint8_t tl);
+ BOOL ow_write_scratchpad_ds2438 (uint8_t th, uint8_t tl);
+ BOOL ow_write_eeprom_ds18x20 (void);
+ BOOL ow_write_eeprom_ds2438 (void);
+ void ow_read_address (void);
+*/
+ //-----------------------------------------------------------------------------
+ // vars
+
+ I2C i2c;
+ int addr;
+ uint8_t crc_value;
+
+ // Search state
+ tOW ow; // Variablen in einem Block ablegen
+ uint8_t ow_scratchpad[OW_SCRATCHPAD_BYTES]; // Scratchpad memory
+ uint8_t ow_rom_code[OW_ROM_CODE_BYTES]; // Temporary ROM code
+ uint8_t ow_flags;
+ uint8_t ROM_NO[8]; // temporary ROM Code
+ uint8_t LastDiscrepancy;
+ uint8_t LastFamilyDiscrepancy;
+ uint8_t LastDeviceFlag;
+
+ // DS2482 state
+ uint8_t c1WS, cSPU, cPPM, cAPU;
+ uint8_t short_detected;
+
+}; // end class
+
+#endif