Mike Fruge / OneWire

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Dependents:   Max32630_One_Wire_Interface

OneWire_Masters/GPIO/owgpio.h@28:057bb14d3cee, 2016-03-29 (annotated)

Committer:
IanBenzMaxim
Date:
Tue Mar 29 09:55:25 2016 -0500
Revision:
28:057bb14d3cee
Parent:
26:a361e3f42ba5
Child:
32:bce180b544ed
Updated bit-bang master to use assembly counter for timing. Tested in IAR using High Speed and No Size Constraint optimizations.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
j3 3:644fc630f958 1 /******************************************************************//**
j3 3:644fc630f958 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
j3 3:644fc630f958 3 *
j3 3:644fc630f958 4 * Permission is hereby granted, free of charge, to any person obtaining a
j3 3:644fc630f958 5 * copy of this software and associated documentation files (the "Software"),
j3 3:644fc630f958 6 * to deal in the Software without restriction, including without limitation
j3 3:644fc630f958 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
j3 3:644fc630f958 8 * and/or sell copies of the Software, and to permit persons to whom the
j3 3:644fc630f958 9 * Software is furnished to do so, subject to the following conditions:
j3 3:644fc630f958 10 *
j3 3:644fc630f958 11 * The above copyright notice and this permission notice shall be included
j3 3:644fc630f958 12 * in all copies or substantial portions of the Software.
j3 3:644fc630f958 13 *
j3 3:644fc630f958 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
j3 3:644fc630f958 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
j3 3:644fc630f958 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
j3 3:644fc630f958 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
j3 3:644fc630f958 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
j3 3:644fc630f958 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
j3 3:644fc630f958 20 * OTHER DEALINGS IN THE SOFTWARE.
j3 3:644fc630f958 21 *
j3 3:644fc630f958 22 * Except as contained in this notice, the name of Maxim Integrated
j3 3:644fc630f958 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
j3 3:644fc630f958 24 * Products, Inc. Branding Policy.
j3 3:644fc630f958 25 *
j3 3:644fc630f958 26 * The mere transfer of this software does not imply any licenses
j3 3:644fc630f958 27 * of trade secrets, proprietary technology, copyrights, patents,
j3 3:644fc630f958 28 * trademarks, maskwork rights, or any other form of intellectual
j3 3:644fc630f958 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
j3 3:644fc630f958 30 * ownership rights.
j3 3:644fc630f958 31 **********************************************************************/
j3 3:644fc630f958 32
j3 3:644fc630f958 33
j3 3:644fc630f958 34 #ifndef OWGPIO_H
j3 3:644fc630f958 35 #define OWGPIO_H
j3 3:644fc630f958 36
j3 3:644fc630f958 37
j3 10:0df2cc66fc47 38 #if(TARGET_MAX32600)
j3 10:0df2cc66fc47 39
j3 10:0df2cc66fc47 40
j3 3:644fc630f958 41 #include "mbed.h"
IanBenzMaxim 24:8942d8478d68 42 #include "OneWire_Masters/OneWireMaster.h"
j3 3:644fc630f958 43
j3 3:644fc630f958 44
j3 15:f6cb0d906fb6 45 class OwGpio: public OneWireMaster
j3 3:644fc630f958 46 {
IanBenzMaxim 26:a361e3f42ba5 47 public:
IanBenzMaxim 28:057bb14d3cee 48
IanBenzMaxim 28:057bb14d3cee 49 struct OwTiming
IanBenzMaxim 28:057bb14d3cee 50 {
IanBenzMaxim 28:057bb14d3cee 51 uint16_t tRSTL, tMSP, tW0L, tW1L, tMSR, tSLOT; // All times are in terms of micro seconds
IanBenzMaxim 28:057bb14d3cee 52 };
j3 9:641516a3f0dc 53
IanBenzMaxim 28:057bb14d3cee 54 static const OwTiming stdTiming;
IanBenzMaxim 28:057bb14d3cee 55 static const OwTiming odTiming;
IanBenzMaxim 28:057bb14d3cee 56
IanBenzMaxim 28:057bb14d3cee 57
j3 3:644fc630f958 58 /**********************************************************//**
j3 10:0df2cc66fc47 59 * @brief Owgpio constructor
j3 10:0df2cc66fc47 60 *
j3 10:0df2cc66fc47 61 * @details Initializes given pin for open-drain operation
j3 10:0df2cc66fc47 62 *
j3 10:0df2cc66fc47 63 * On Entry:
j3 10:0df2cc66fc47 64 *
j3 10:0df2cc66fc47 65 * @para[in] ow_gpio - GPIO pin to use for One Wire bus
j3 10:0df2cc66fc47 66 *
j3 10:0df2cc66fc47 67 * @param[in] ext_spu - GPIO pin to use for Strong Pull-Up
j3 10:0df2cc66fc47 68 *
j3 10:0df2cc66fc47 69 * On Exit:
j3 10:0df2cc66fc47 70 *
j3 10:0df2cc66fc47 71 * @return
j3 10:0df2cc66fc47 72 **************************************************************/
j3 10:0df2cc66fc47 73 OwGpio(PinName ow_gpio, PinName ext_spu = NC);
j3 10:0df2cc66fc47 74
j3 10:0df2cc66fc47 75
j3 23:e8e403d61359 76 //Part of OneWireMaster that should be implemented for each master
j3 23:e8e403d61359 77 //See OneWireMaster.h for documentation
j3 15:f6cb0d906fb6 78
j3 23:e8e403d61359 79 virtual OneWireMaster::CmdResult OWInitMaster(void);
j3 3:644fc630f958 80
j3 23:e8e403d61359 81 virtual OneWireMaster::CmdResult OWReset(void);
j3 3:644fc630f958 82
IanBenzMaxim 26:a361e3f42ba5 83 virtual OneWireMaster::CmdResult OWTouchBit(uint8_t & sendrecvbit, OW_LEVEL after_level);
j3 17:b646b1e3970b 84
IanBenzMaxim 26:a361e3f42ba5 85 virtual OneWireMaster::CmdResult OWWriteByte(uint8_t sendbyte, OW_LEVEL after_level);
j3 3:644fc630f958 86
IanBenzMaxim 26:a361e3f42ba5 87 virtual OneWireMaster::CmdResult OWReadByte(uint8_t & recvbyte, OW_LEVEL after_level);
j3 17:b646b1e3970b 88
j3 23:e8e403d61359 89 virtual OneWireMaster::CmdResult OWWriteBlock(const uint8_t *tran_buf, uint8_t tran_len);
j3 23:e8e403d61359 90
j3 23:e8e403d61359 91 virtual OneWireMaster::CmdResult OWReadBlock(uint8_t *rx_buf, uint8_t rx_len);
j3 3:644fc630f958 92
j3 23:e8e403d61359 93 virtual OneWireMaster::CmdResult OWSearch(RomId & romId);
j3 23:e8e403d61359 94
j3 23:e8e403d61359 95 virtual OneWireMaster::CmdResult OWSpeed(OW_SPEED new_speed);
j3 3:644fc630f958 96
j3 23:e8e403d61359 97 virtual OneWireMaster::CmdResult OWLevel(OW_LEVEL new_level);
IanBenzMaxim 26:a361e3f42ba5 98
IanBenzMaxim 26:a361e3f42ba5 99 private:
j3 3:644fc630f958 100
IanBenzMaxim 28:057bb14d3cee 101 const unsigned int _ow_port;
IanBenzMaxim 28:057bb14d3cee 102 const unsigned int _ow_pin;
IanBenzMaxim 28:057bb14d3cee 103
j3 5:ce108eeb878d 104 DigitalOut _ext_spu;
j3 9:641516a3f0dc 105 OW_SPEED _ow_speed;
IanBenzMaxim 28:057bb14d3cee 106 OW_LEVEL _ow_level;
j3 9:641516a3f0dc 107
IanBenzMaxim 28:057bb14d3cee 108 inline void write_ow_gpio_low();
IanBenzMaxim 28:057bb14d3cee 109 inline void write_ow_gpio_high();
IanBenzMaxim 28:057bb14d3cee 110 inline bool read_ow_gpio();
IanBenzMaxim 28:057bb14d3cee 111 inline void set_ow_gpio_mode(unsigned int mode);
j3 3:644fc630f958 112 };
j3 3:644fc630f958 113
j3 10:0df2cc66fc47 114 #endif/* TARGET_MAX32600*/
j3 3:644fc630f958 115 #endif /*OWGPIO_H*/