Superseded by MaximInterface.

File content as of revision 92:aa40c49b8563:

/******************************************************************//**
* 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"),
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* 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
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*
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* 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
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**********************************************************************/

#ifndef OneWire_Masters_DS2480B
#define OneWire_Masters_DS2480B

#include "PinNames.h"
#include "Masters/OneWireMaster.h"

namespace mbed { class Serial; }

namespace OneWire
{
    ///UART to 1-wire master interface
    class DS2480B : public OneWireMaster
    {
    public:
    
        ///Valid baud rates for DS2480B
        enum Baud
        {
            Bps9600 = 0,
            Bps19200 = 2,
            Bps57600 = 4,
            Bps115200 = 6
        };

        /**********************************************************//**
        * @brief DS2480B constructor
        *
        * @details allows user to use existing Serial object
        *
        * On Entry:
        *     @param[in] p_serial - pointer to existing serial object
        *
        * On Exit:
        *    @return
        **************************************************************/
        DS2480B(mbed::Serial &p_serial);


        /**********************************************************//**
        * @brief DS2480B destructor
        *
        * @details deletes serial object if owner
        *
        * On Entry:
        *
        * On Exit:
        *    @return
        **************************************************************/
        virtual ~DS2480B();


        OneWireMaster::CmdResult DS2480B_ChangeBaud(Baud newBaud);

        virtual OneWireMaster::CmdResult OWInitMaster();
        virtual OneWireMaster::CmdResult OWReset();
        virtual OneWireMaster::CmdResult OWTouchBitSetLevel(uint8_t & sendRecvBit, OWLevel afterLevel);
        virtual OneWireMaster::CmdResult OWWriteByteSetLevel(uint8_t sendByte, OWLevel afterLevel);
        virtual OneWireMaster::CmdResult OWReadByteSetLevel(uint8_t & recvByte, OWLevel afterLevel);
        virtual OneWireMaster::CmdResult OWSetSpeed(OWSpeed newSpeed);
        virtual OneWireMaster::CmdResult OWSetLevel(OWLevel newLevel);

    private:
        void rx_callback(void);

        OneWireMaster::CmdResult DS2480B_Detect(void);
        OneWireMaster::CmdResult WriteCOM(uint32_t outlen, uint8_t *outbuf);
        OneWireMaster::CmdResult ReadCOM(uint32_t inlen, uint8_t *inbuf);
        void BreakCOM(void);
        void FlushCOM(void);
        void SetBaudCOM(uint8_t new_baud);
        int32_t bitacc(uint32_t op, uint32_t state, uint32_t loc, uint8_t *buf);

        mbed::Serial *_p_serial;
        bool _serial_owner;

        // DS2480B state
        OWLevel _ULevel; // 1-Wire level
        Baud _UBaud;  // baud rate
        uint8_t _UMode;  // command or data mode state
        uint8_t _USpeed; // 1-Wire communication speed

        static const size_t MAX_RX_BUFFER_LEN = 256;
        volatile struct ds2480b_circular_buff_s
        {
            uint8_t w_idx;
            uint8_t r_idx;
            uint8_t rx_bytes_available;
            bool wrap_error;
            uint8_t buff[MAX_RX_BUFFER_LEN];
        }rx_buffer;
    };
}

#endif