![](/media/cache/group/MI_Logo_Small_Pos_RGB.gif.50x50_q85.png)
Demo of OneWire Library for mbed using the DS18B20 as an example slave device. Connect Tera Term t 9600bps 8N1 with terminal 'Receive' to auto and 'Transmit' to CR+LF
Dependencies: OneWire Terminal mbed
Diff: main.cpp
- Revision:
- 0:e670c2af93db
- Child:
- 1:819782bce064
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Sun Jul 03 20:54:30 2016 +0000 @@ -0,0 +1,350 @@ +/********************************************************************** +* 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. +**********************************************************************/ + + +#include "mbed.h" +#include "OneWire.h" +#include "Terminal.h" + +using namespace OneWire; +using namespace RomCommands; + +//Uncomment the master for your setup + +//#define I2C_TO_OW_MASTER +//#define SERIAL_TO_OW_MASTER +#define BIT_BANG_MASTER + +void print_rom_id(Terminal & term, const RomId & romId); +void DS18B20Menu(Terminal & term, const RomId & romId, MultidropRomIterator & selector); + +int main(void) +{ + Terminal term(USBTX, USBRX); + char user_entry = 'y'; + + #if defined(I2C_TO_OW_MASTER) + //Instantiates a 1-wire master using the given I2C bus SDA/SCL pins + //Requires a DS248X series of masters on I2C bus + //https://para.maximintegrated.com/en/results.mvp?fam=1wire&tree=master + + I2C i2cBus(D14, D15); + DS2484 owm(i2cBus); + term.printf("\nStarting I2C to 1-wire Demo\n"); + + #elif defined(SERIAL_TO_OW_MASTER) + //Instantiates a 1-wire master using the given UART tx/rx pins + //Requires a DS2480B serial to 1-wire master + //https://www.maximintegrated.com/en/products/interface/controllers-expanders/DS2480B.html + + Serial ow_uart(D1, D0); + Ds2480b owm(ow_uart); + term.printf("\nStarting Serial to 1-wire Demo\n"); + + #elif defined(BIT_BANG_MASTER) + //Instantiates a 1-wire master on the given GPIO pin + //Requires MAX32600MBED platform + //https://www.maximintegrated.com/en/products/digital/microcontrollers/MAX32600MBED.html + + OwGpio owm(D2); + term.printf("\nStarting Bit-Bang 1-wire Demo\n"); + + #else + #error One Wire Master Not Defined + #endif + + OneWireMaster::CmdResult result = owm.OWInitMaster(); + + if(result == OneWireMaster::Success) + { + MultidropRomIterator selector(owm); + + //Search state var for main loop + SearchState searchState; + + while(user_entry != 'n') + { + result = owm.OWReset(); + if(result == OneWireMaster::Success) + { + term.printf("\nOWReset success, starting search\n"); + + result = OWFirst(owm, searchState); + if(result == OneWireMaster::Success) + { + do + { + //print current devices rom id + print_rom_id(term, searchState.romId); + + + //This could be a switch statement based on familyCodes + //if your app has more than one device on the bus + if(searchState.romId.familyCode() == DS18B20::FAMILY_CODE) + { + DS18B20Menu(term, searchState.romId, selector); + } + + //find the next device if any + result = OWNext(owm, searchState); + } + while(result == OneWireMaster::Success); + } + else + { + term.printf("\nSearch failed\n"); + term.printf("\nError code = %d\n", result); + } + } + else + { + term.printf("\nFailed to find any 1-wire devices on bus\n"); + term.printf("\nError code = %d\n", result); + } + + user_entry = term.get_char("\nEnter 'y' to continue, or 'n' to quit: ", 'n', 'y'); + term.cls(); + term.home(); + } + } + else + { + term.printf("\nFailed to initialize the 1-wire Master\n"); + term.printf("\nError code = %d\n", result); + } + + term.printf("\nEnding Program\n"); + + return 0; +} +//***** end main ****************************************************** + + +//********************************************************************* +void print_rom_id(Terminal & term, const RomId & romId) +{ + //print the rom number + term.printf("\n"); + int8_t idx = (RomId::byteLen - 1); + do + { + if(romId[idx] < 16) + { + term.printf("0x0%x ", romId[idx--]); + } + else + { + term.printf("0x%2x ", romId[idx--]); + } + } + while(idx >= 0); + term.printf("\n"); +} + + +//********************************************************************* +void DS18B20Menu(Terminal & term, const RomId & romId, MultidropRomIterator & selector) +{ + char userEntry = '0'; + uint8_t th, tl, idx, intResolution; + DS18B20::Resolution resolution = DS18B20::TWELVE_BIT; + bool localPower = false; + uint8_t scratchPadBuff[9]; + float temperature; + + DS18B20 tempSensor(selector); + OneWireSlave::CmdResult result = OneWireSlave::OperationFailure; + tempSensor.setRomId(romId); + + while(userEntry != '8') + { + term.printf("\nDS18B20 Menu Options\n"); + term.printf("\n%t1. Write ScratchPad"); + term.printf("\n%t2. Read Scratchpad"); + term.printf("\n%t3. Copy Scratchpad"); + term.printf("\n%t4. Convert Temperature"); + term.printf("\n%t5. Recall EEPROM"); + term.printf("\n%t6. Read Power Supply"); + term.printf("\n%t7. Clear Screen"); + term.printf("\n%t8. Continuously Convert Temperature"); + term.printf("\n%t9. Quit"); + + userEntry = term.get_char("\nPlease select an option above: ", '1', '9'); + + switch(userEntry) + { + case '1': + th = term.get_int32("\nPlease enter upper temperature threshold, integer values only: ", 0, 100); + tl = term.get_int32("\nPlease enter lower temperature threshold, integer values only: ", -55, 0); + intResolution = term.get_int32("\nPlease enter desired reolution (9 to 12): ", 9, 12); + + switch(intResolution) + { + case 9: + resolution = DS18B20::NINE_BIT; + case 10: + resolution = DS18B20::TEN_BIT; + case 11: + resolution = DS18B20::ELEVEN_BIT; + case 12: + default: + resolution = DS18B20::TWELVE_BIT; + break; + } + + result = tempSensor.writeScratchPad(th, tl, resolution); + if(result == OneWireSlave::Success) + { + term.printf("\nWrite Scratchpad Success\n"); + } + else + { + term.printf("\nWrite Scratchpad Fail\n"); + } + + break; + + case '2': + + result = tempSensor.readScratchPad(scratchPadBuff); + if(result == OneWireSlave::Success) + { + term.printf("\nRead Scratchpad Success\n"); + term.printf("\nScratchpad = "); + for(idx = 0; idx < 8; idx++) + { + if(scratchPadBuff[idx] < 16) + { + term.printf("0x0%x ", scratchPadBuff[idx]); + } + else + { + term.printf("0x%2x ", scratchPadBuff[idx]); + } + } + term.printf("\n"); + + } + else + { + term.printf("\nRead Scratchpad Fail\n"); + } + + break; + + case '3': + + result = tempSensor.copyScratchPad(); + if(result == OneWireSlave::Success) + { + term.printf("\nCopy Scratchpad Success\n"); + } + else + { + term.printf("\nCopy Scratchpad Fail\n"); + } + + break; + + case '4': + + result = tempSensor.convertTemperature(temperature); + if(result == OneWireSlave::Success) + { + term.printf("\nConvert Temperature Success\n"); + term.printf("\nTemperature = %.4f", temperature); + } + else + { + term.printf("\nConvert Temperature Fail\n"); + } + + break; + + case '5': + + result = tempSensor.recallEEPROM(); + if(result == OneWireSlave::Success) + { + term.printf("\nRecall EEPROM Success\n"); + } + else + { + term.printf("\nRecall EEPROM Fail\n"); + } + + break; + + case '6': + result = tempSensor.readPowerSupply(localPower); + if(result == OneWireSlave::Success) + { + term.printf("Read Power Supply Success\n"); + term.printf("DS18B20 %s\n", localPower ? "Has Local Power" : "Is Parasite Powered"); + } + else + { + term.printf("Read Power Supply Failed\n"); + } + break; + + case '7': + term.cls(); + term.home(); + break; + + case '8': + do + { + result = tempSensor.convertTemperature(temperature); + if(result == OneWireSlave::Success) + { + term.printf("\nTemperature = %.4f", temperature); + } + else + { + term.printf("\nConvert Temperature Fail\n"); + } + } + while(result == OneWireSlave::Success); + break; + + case '9': + term.printf("\nLeaving DS18B20 Menu Options\n"); + break; + + default: + mbed_die(); + break; + } + } +}