Mike Fruge
Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Diff: OneWire_Masters/DS248x/ds248x.h
- Revision:
- 1:91e52f8ab8bf
- Child:
- 2:02d228c25fd4
diff -r 19ec8044b826 -r 91e52f8ab8bf OneWire_Masters/DS248x/ds248x.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/OneWire_Masters/DS248x/ds248x.h Sat Jan 30 23:00:57 2016 +0000
@@ -0,0 +1,526 @@
+/******************************************************************//**
+* @file ds248x.h
+*
+* @author Justin Jordan
+*
+* @version 0.0.0
+*
+* Started: 30JAN16
+*
+* Updated:
+*
+* @brief Header file for Ds248x I2C to 1-wire master
+***********************************************************************
+* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+**********************************************************************/
+
+
+#ifndef DS248X_H
+#define DS248X_H
+
+
+#include "mbed.h"
+#include "OneWireInterface.h"
+
+
+class Ds248x: public OneWireInterface
+{
+ public:
+
+ typedef enum
+ {
+ DS248X_I2C_ADRS0 = 0x18,
+ DS248X_I2C_ADRS1,
+ DS248X_I2C_ADRS2,
+ DS248X_I2C_ADRS3,
+ DS248X_I2C_ADRS4,
+ DS248X_I2C_ADRS5,
+ DS248X_I2C_ADRS6,
+ DS248X_I2C_ADRS7,
+ }
+ ds248x_i2c_adrs_t
+
+ /**********************************************************//**
+ * @brief Ds248x constructor
+ *
+ * @details allows user to use existing I2C object
+ *
+ * On Entry:
+ * @param[in] p_i2c_bus - pointer to existing I2C object
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ Ds248x(I2C *p_i2c_bus, ds248x_i2c_adrs_t adrs);
+
+
+ /**********************************************************//**
+ * @brief Ds248x constructor
+ *
+ * @details allows user to use existing I2C object
+ *
+ * On Entry:
+ * @param[in] sda - sda pin of I2C bus
+ * @param[in] scl - scl pin of I2C bus
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ Ds248x(PinName sda, PinName scl, ds248x_i2c_adrs_t adrs);
+
+
+ /**********************************************************//**
+ * @brief Ds248x destructor
+ *
+ * @details deletes I2C object if owner
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ ~Ds248x();
+
+
+ /**********************************************************//**
+ * @brief detect()
+ *
+ * @details Detect routine that performs a device reset
+ * followed by writing the configuration byte to default
+ * values:
+ * 1-Wire speed (c1WS) = standard (0)
+ * Strong pull-up (cSPU) = off (0)
+ * Presence pulse masking (cPPM) = off (0)
+ * Active pull-up (cAPU) = on (CONFIG_APU = 0x01)
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE if device was detected and written
+ * FALSE device not detected or failure to write
+ * configuration byte
+ **************************************************************/
+ uint8_t detect(void);
+
+
+ /**********************************************************//**
+ * @brief reset()
+ *
+ * @details Perform a device reset on the Ds248x
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE if device was reset
+ * FALSE device not detected or failure to perform reset
+ **************************************************************/
+ uint8_t reset(void);
+
+
+ /**********************************************************//**
+ * @brief write_config()
+ *
+ * @details Write the configuration register in the Ds248x. The
+ * configuration options are provided in the lower nibble
+ * of the provided config byte. The uppper nibble is
+ * bitwise inverted when written to the Ds248x.
+ *
+ * On Entry:
+ * @param[in] config - lower nib of configuration register
+ *
+ * On Exit:
+ * @return TRUE: config written and response correct
+ * FALSE: response incorrect
+ **************************************************************/
+ uint8_t write_config(uint8_t config);
+
+
+ /**********************************************************//**
+ * @brief adjust_timing()
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] param - 1 of 8 adjustable parameters
+ * @param[in] val - new value for parameter, see datasheet
+ * for codes
+ *
+ * On Exit:
+ * @return TRUE: parameter successfully adjusted
+ * FALSE: failed to adjust parameter
+ **************************************************************/
+ uint8_t adjust_timing(uint8_t param, uint8_t val);
+
+
+ /**********************************************************//**
+ * @brief search_triplet()
+ *
+ * @details Use the Ds248x help command '1-Wire triplet' to perform
+ * one bit of a 1-Wire search. This command does two read
+ * bits and one write bit. The write bit is either the
+ * default direction (all device have same bit) or in case
+ * of a discrepancy, the 'search_direction' parameter is
+ * used.
+ *
+ * On Entry:
+ * @param[in] search_direction
+ *
+ * On Exit:
+ * @return The Ds248x status byte result from the triplet command
+ **************************************************************/
+ uint8_t search_triplet(uint8_t search_direction);
+
+
+ /**********************************************************//**
+ * @brief Reset all of the devices on the 1-Wire Net and return
+ * the result.
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE(1): presence pulse(s) detected, device(s) reset
+ * FALSE(0): no presence pulses detected
+ **************************************************************/
+ virtual uint8_t OWReset();
+
+
+ /**********************************************************//**
+ * @brief Send 1 bit of communication to the 1-Wire Net.
+ * The parameter 'sendbit' least significant bit is used.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'sendbit' - 1 bit to send (least significant byte)
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ virtual void OWWriteBit(uint8_t sendbit);
+
+
+ /**********************************************************//**
+ * @brief Reads 1 bit of communication from the 1-Wire Net and
+ * returns the result
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return 1 bit read from 1-Wire Net
+ **************************************************************/
+ virtual uint8_t OWReadBit();
+
+
+ /**********************************************************//**
+ * @brief Send 1 bit of communication to the 1-Wire Net and return
+ * the result 1 bit read from the 1-Wire Net. The
+ * parameter 'sendbit' least significant bit is used and
+ * the least significant bit of the result is the return
+ * bit.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'sendbit' - the least significant bit is the bit to send
+ *
+ * On Exit:
+ * @return 0: 0 bit read from sendbit
+ * 1: 1 bit read from sendbit
+ **************************************************************/
+ virtual uint8_t OWTouchBit(uint8_t sendbit);
+
+
+ /**********************************************************//**
+ * @brief Send 8 bits of communication to the 1-Wire Net and
+ * verify that the 8 bits read from the 1-Wire Net is the
+ * same (write operation).The parameter 'sendbyte' least
+ * significant 8 bits are used.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'sendbyte' - 8 bits to send (least significant byte)
+ *
+ * On Exit:
+ * @return TRUE: bytes written and echo was the same
+ * FALSE: echo was not the same
+ **************************************************************/
+ virtual void OWWRiteByte(uint8_t sendbyte);
+
+
+ /**********************************************************//**
+ * @brief Send 8 bits of read communication to the 1-Wire Net and
+ * return the result 8 bits read from the 1-Wire Net.
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return 8 bits read from 1-Wire Net
+ **************************************************************/
+ virtual uint8_t OWReadByte(void);
+
+
+ /**********************************************************//**
+ * @brief Send 8 bits of communication to the 1-Wire Net and
+ * return the result 8 bits read from the 1-Wire Net. The
+ * parameter 'sendbyte' least significant 8 bits are used
+ * and the least significant 8 bits of the result is the
+ * return byte.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'sendbyte' - 8 bits to send (least significant byte)
+ *
+ * On Exit:
+ * @return 8 bits read from sendbyte
+ **************************************************************/
+ virtual uint8_t OWTouchByte(uint8_t sendbyte);
+
+
+ /**********************************************************//**
+ * @brief The 'OWBlock' transfers a block of data to and from the
+ * 1-Wire Net. The result is returned in the same buffer.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'tran_buf' - pointer to a block of unsigned
+ * chars of length 'tran_len' that
+ * will be sent to the 1-Wire Net
+ * @param[in] 'tran_len' - length in bytes to transfer
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ virtual void OWBlock(uint8_t *tran_buf, uint8_t tran_len);
+
+
+ /**********************************************************//**
+ * @brief Find the 'first' devices on the 1-Wire network
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE : device found, ROM number in ROM_NO buffer
+ * FALSE : no device present
+ **************************************************************/
+ virtual void OWFirst(void);
+
+
+ /**********************************************************//**
+ * @brief Find the 'next' devices on the 1-Wire network
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE : device found, ROM number in ROM_NO buffer
+ * FALSE : device not found, end of search
+ **************************************************************/
+ virtual uint8_t OWNext(void);
+
+
+ /**********************************************************//**
+ * @brief Verify the device with the ROM number in ROM_NO buffer
+ * is present.
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE : device verified present
+ * FALSE : device not present
+ **************************************************************/
+ virtual uint8_t OWVerify(void);
+
+
+ /**********************************************************//**
+ * @brief Setup the search to find the device type 'family_code'
+ * on the next call to OWNext() if it is present.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] family_code - family code of device
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ virtual void OWTargetSetup(uint8_t family_code);
+
+
+ /**********************************************************//**
+ * @brief Setup the search to skip the current device type on the
+ * next call to OWNext().
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ virtual void OWFamilySkipSetup(void);
+
+
+ /**********************************************************//**
+ * @brief The 'OWSearch' function does a general search. This
+ * function continues from the previous search state. The
+ * search state can be reset by using the 'OWFirst'
+ * function. This function contains one parameter
+ * 'alarm_only'. When 'alarm_only' is TRUE (1) the find
+ * alarm command 0xEC is sent instead of the normal search
+ * command 0xF0. Using the find alarm command 0xEC will
+ * limit the search to only 1-Wire devices that are in an
+ * 'alarm' state.
+ *
+ * @details
+ *
+ * On Entry:
+ *
+ * On Exit:
+ * @return TRUE (1) : when a 1-Wire device was found and its
+ * Serial Number placed in the global ROM
+ * FALSE (0): when no new device was found. Either the
+ * last search was the last device or there
+ * are no devices on the 1-Wire Net.
+ **************************************************************/
+ virtual uint8_t OWSearch(void);
+
+
+ /**********************************************************//**
+ * @brief Set the 1-Wire Net communication speed.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'new_speed' - new speed defined as
+ * MODE_STANDARD 0x00
+ * MODE_OVERDRIVE 0x01
+ *
+ * On Exit:
+ * @return current 1-Wire Net speed
+ **************************************************************/
+ virtual uint8_t OWSpeed(uint8_t new_speed);
+
+
+ /**********************************************************//**
+ * @brief Set the 1-Wire Net line level pull-up to normal. The
+ * Ds248x does only allows enabling strong pull-up on a
+ * bit or byte event. Consequently this function only
+ * allows the MODE_STANDARD argument. To enable strong
+ * pull-up use OWWriteBytePower or OWReadBitPower.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'new_level' - new level defined as
+ * MODE_STANDARD 0x00
+ *
+ * On Exit:
+ * @return current 1-Wire Net level
+ **************************************************************/
+ virtual uint8_t OWLevel(uint8_t new_level);
+
+
+ /**********************************************************//**
+ * @brief Send 8 bits of communication to the 1-Wire Net and
+ * verify that the 8 bits read from the 1-Wire Net is the
+ * same (write operation). The parameter 'sendbyte' least
+ * significant 8 bits are used. After the 8 bits are sent
+ * change the level of the 1-Wire net.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'sendbyte' - 8 bits to send (least significant bit)
+ *
+ * On Exit:
+ * @return TRUE: bytes written and echo was the same, strong pullup now on
+ * FALSE: echo was not the same
+ **************************************************************/
+ virtual uint8_t OWWriteBytePower(uint8_t sendbyte);
+
+
+ /**********************************************************//**
+ * @brief Send 1 bit of communication to the 1-Wire Net and verify
+ * that the response matches the 'applyPowerResponse' bit
+ * and apply power delivery to the 1-Wire net. Note that
+ * some implementations may apply the power first and then
+ * turn it off if the response is incorrect.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] 'applyPowerResponse' - 1 bit response to check,
+ * if correct
+ * then start power delivery
+ *
+ * On Exit:
+ * @return
+ **************************************************************/
+ virtual uint8_t OWReadBitPower(uint8_t applyPowerResponse);
+
+
+ /**********************************************************//**
+ * @brief Calculate the CRC8 of the byte value provided with the
+ * current global 'crc8' value.
+ *
+ * @details
+ *
+ * On Entry:
+ * @param[in] data
+ *
+ * On Exit:
+ * @return current global crc8 value
+ **************************************************************/
+ virtual uint8_t calc_crc8(uint8_t data);
+
+ private:
+
+ I2C *_p_i2c_bus;
+ bool i2c_owner;
+ uint8_t _w_adrs, _r_adrs;
+
+};
+
+#endif /*DS248X_H*/
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