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IAQ2000DHT11/I2Cdev/I2Cdev.h

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  1. // I2Cdev library collection - Main I2C device class header file

  2. // Abstracts bit and byte I2C R/W functions into a convenient class

  3. // 2013-06-05 by Jeff Rowberg <jeff@rowberg.net>

  4. //

  5. // Changelog:

  6. //      2020-01-20 - hardija : complete support for Teensy 3.x

  7. //      2015-10-30 - simondlevy : support i2c_t3 for Teensy3.1

  8. //      2013-05-06 - add Francesco Ferrara's Fastwire v0.24 implementation with small modifications

  9. //      2013-05-05 - fix issue with writing bit values to words (Sasquatch/Farzanegan)

  10. //      2012-06-09 - fix major issue with reading > 32 bytes at a time with Arduino Wire

  11. //                 - add compiler warnings when using outdated or IDE or limited I2Cdev implementation

  12. //      2011-11-01 - fix write*Bits mask calculation (thanks sasquatch @ Arduino forums)

  13. //      2011-10-03 - added automatic Arduino version detection for ease of use

  14. //      2011-10-02 - added Gene Knight's NBWire TwoWire class implementation with small modifications

  15. //      2011-08-31 - added support for Arduino 1.0 Wire library (methods are different from 0.x)

  16. //      2011-08-03 - added optional timeout parameter to read* methods to easily change from default

  17. //      2011-08-02 - added support for 16-bit registers

  18. //                 - fixed incorrect Doxygen comments on some methods

  19. //                 - added timeout value for read operations (thanks mem @ Arduino forums)

  20. //      2011-07-30 - changed read/write function structures to return success or byte counts

  21. //                 - made all methods static for multi-device memory savings

  22. //      2011-07-28 - initial release

  23. 

  24. /* ============================================

  25.  I2Cdev device library code is placed under the MIT license

  26.  Copyright (c) 2013 Jeff Rowberg

  27. 

  28.  Permission is hereby granted, free of charge, to any person obtaining a copy

  29.  of this software and associated documentation files (the "Software"), to deal

  30.  in the Software without restriction, including without limitation the rights

  31.  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

  32.  copies of the Software, and to permit persons to whom the Software is

  33.  furnished to do so, subject to the following conditions:

  34. 

  35.  The above copyright notice and this permission notice shall be included in

  36.  all copies or substantial portions of the Software.

  37. 

  38.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

  39.  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

  40.  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

  41.  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

  42.  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

  43.  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

  44.  THE SOFTWARE.

  45.  ===============================================

  46.  */

  47. 

  48. #ifndef _I2CDEV_H_

  49. #define _I2CDEV_H_

  50. 

  51. // -----------------------------------------------------------------------------

  52. // I2C interface implementation setting

  53. // -----------------------------------------------------------------------------

  54. #ifndef I2CDEV_IMPLEMENTATION

  55. #define I2CDEV_IMPLEMENTATION       I2CDEV_ARDUINO_WIRE

  56. //#define I2CDEV_IMPLEMENTATION       I2CDEV_TEENSY_3X_WIRE

  57. //#define I2CDEV_IMPLEMENTATION       I2CDEV_BUILTIN_SBWIRE

  58. //#define I2CDEV_IMPLEMENTATION       I2CDEV_BUILTIN_FASTWIRE

  59. #endif // I2CDEV_IMPLEMENTATION

  60. 

  61. // comment this out if you are using a non-optimal IDE/implementation setting

  62. // but want the compiler to shut up about it

  63. #define I2CDEV_IMPLEMENTATION_WARNINGS

  64. 

  65. // -----------------------------------------------------------------------------

  66. // I2C interface implementation options

  67. // -----------------------------------------------------------------------------

  68. #define I2CDEV_ARDUINO_WIRE         1 // Wire object from Arduino

  69. #define I2CDEV_BUILTIN_NBWIRE       2 // Tweaked Wire object from Gene Knight's NBWire project

  70. // ^^^ NBWire implementation is still buggy w/some interrupts!

  71. #define I2CDEV_BUILTIN_FASTWIRE     3 // FastWire object from Francesco Ferrara's project

  72. #define I2CDEV_I2CMASTER_LIBRARY    4 // I2C object from DSSCircuits I2C-Master Library at https://github.com/DSSCircuits/I2C-Master-Library

  73. #define I2CDEV_BUILTIN_SBWIRE	    5 // I2C object from Shuning (Steve) Bian's SBWire Library at https://github.com/freespace/SBWire 

  74. #define I2CDEV_TEENSY_3X_WIRE       6 // Teensy 3.x support using i2c_t3 library

  75. 

  76. // -----------------------------------------------------------------------------

  77. // Arduino-style "Serial.print" debug constant (uncomment to enable)

  78. // -----------------------------------------------------------------------------

  79. //#define I2CDEV_SERIAL_DEBUG

  80. 

  81. #ifdef ARDUINO

  82. #if ARDUINO < 100

  83.         #include "WProgram.h"

  84.     #else

  85. #include "Arduino.h"

  86. #endif

  87. #if I2CDEV_IMPLEMENTATION == I2CDEV_ARDUINO_WIRE

  88. #include <Wire.h>

  89. #endif

  90. #if I2CDEV_IMPLEMENTATION == I2CDEV_TEENSY_3X_WIRE

  91.         #include <i2c_t3.h>

  92.     #endif

  93. #if I2CDEV_IMPLEMENTATION == I2CDEV_I2CMASTER_LIBRARY

  94.         #include <I2C.h>

  95.     #endif

  96. #if I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_SBWIRE

  97.         #include "SBWire.h"

  98.     #endif

  99. #endif

  100. 

  101. #ifdef SPARK

  102.     #include <spark_wiring_i2c.h>

  103.     #define ARDUINO 101

  104. #endif

  105. 

  106. // 1000ms default read timeout (modify with "I2Cdev::readTimeout = [ms];")

  107. #define I2CDEV_DEFAULT_READ_TIMEOUT     1000

  108. 

  109. class I2Cdev {

  110. public:

  111. 	I2Cdev();

  112. 

  113. 	static int8_t readBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum,

  114. 			uint8_t *data, uint16_t timeout = I2Cdev::readTimeout);

  115. 	static int8_t readBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum,

  116. 			uint16_t *data, uint16_t timeout = I2Cdev::readTimeout);

  117. 	static int8_t readBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart,

  118. 			uint8_t length, uint8_t *data, uint16_t timeout =

  119. 					I2Cdev::readTimeout);

  120. 	static int8_t readBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart,

  121. 			uint8_t length, uint16_t *data, uint16_t timeout =

  122. 					I2Cdev::readTimeout);

  123. 	static int8_t readByte(uint8_t devAddr, uint8_t regAddr, uint8_t *data,

  124. 			uint16_t timeout = I2Cdev::readTimeout);

  125. 	static int8_t readWord(uint8_t devAddr, uint8_t regAddr, uint16_t *data,

  126. 			uint16_t timeout = I2Cdev::readTimeout);

  127. 	static int8_t readBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length,

  128. 			uint8_t *data, uint16_t timeout = I2Cdev::readTimeout);

  129. 	static int8_t readWords(uint8_t devAddr, uint8_t regAddr, uint8_t length,

  130. 			uint16_t *data, uint16_t timeout = I2Cdev::readTimeout);

  131. 

  132. 	static bool writeBit(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum,

  133. 			uint8_t data);

  134. 	static bool writeBitW(uint8_t devAddr, uint8_t regAddr, uint8_t bitNum,

  135. 			uint16_t data);

  136. 	static bool writeBits(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart,

  137. 			uint8_t length, uint8_t data);

  138. 	static bool writeBitsW(uint8_t devAddr, uint8_t regAddr, uint8_t bitStart,

  139. 			uint8_t length, uint16_t data);

  140. 	static bool writeByte(uint8_t devAddr, uint8_t regAddr, uint8_t data);

  141. 	static bool writeWord(uint8_t devAddr, uint8_t regAddr, uint16_t data);

  142. 	static bool writeBytes(uint8_t devAddr, uint8_t regAddr, uint8_t length,

  143. 			uint8_t *data);

  144. 	static bool writeWords(uint8_t devAddr, uint8_t regAddr, uint8_t length,

  145. 			uint16_t *data);

  146. 

  147. 	static uint16_t readTimeout;

  148. };

  149. 

  150. #if I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_FASTWIRE

  151.     //////////////////////

  152.     // FastWire 0.24

  153.     // This is a library to help faster programs to read I2C devices.

  154.     // Copyright(C) 2012

  155.     // Francesco Ferrara

  156.     //////////////////////

  157. 

  158.     /* Master */

  159.     #define TW_START                0x08

  160.     #define TW_REP_START            0x10

  161. 

  162.     /* Master Transmitter */

  163.     #define TW_MT_SLA_ACK           0x18

  164.     #define TW_MT_SLA_NACK          0x20

  165.     #define TW_MT_DATA_ACK          0x28

  166.     #define TW_MT_DATA_NACK         0x30

  167.     #define TW_MT_ARB_LOST          0x38

  168. 

  169.     /* Master Receiver */

  170.     #define TW_MR_ARB_LOST          0x38

  171.     #define TW_MR_SLA_ACK           0x40

  172.     #define TW_MR_SLA_NACK          0x48

  173.     #define TW_MR_DATA_ACK          0x50

  174.     #define TW_MR_DATA_NACK         0x58

  175. 

  176.     #define TW_OK                   0

  177.     #define TW_ERROR                1

  178. 

  179.     class Fastwire {

  180.         private:

  181.             static boolean waitInt();

  182. 

  183.         public:

  184.             static void setup(int khz, boolean pullup);

  185.             static byte beginTransmission(byte device);

  186.             static byte write(byte value);

  187.             static byte writeBuf(byte device, byte address, byte *data, byte num);

  188.             static byte readBuf(byte device, byte address, byte *data, byte num);

  189.             static void reset();

  190.             static byte stop();

  191.     };

  192. #endif

  193. 

  194. #if I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_NBWIRE

  195.     // NBWire implementation based heavily on code by Gene Knight <Gene@Telobot.com>

  196.     // Originally posted on the Arduino forum at http://arduino.cc/forum/index.php/topic,70705.0.html

  197.     // Originally offered to the i2cdevlib project at http://arduino.cc/forum/index.php/topic,68210.30.html

  198. 

  199.     #define NBWIRE_BUFFER_LENGTH 32

  200. 

  201.     class TwoWire {

  202.         private:

  203.             static uint8_t rxBuffer[];

  204.             static uint8_t rxBufferIndex;

  205.             static uint8_t rxBufferLength;

  206. 

  207.             static uint8_t txAddress;

  208.             static uint8_t txBuffer[];

  209.             static uint8_t txBufferIndex;

  210.             static uint8_t txBufferLength;

  211. 

  212.             // static uint8_t transmitting;

  213.             static void (*user_onRequest)(void);

  214.             static void (*user_onReceive)(int);

  215.             static void onRequestService(void);

  216.             static void onReceiveService(uint8_t*, int);

  217. 

  218.         public:

  219.             TwoWire();

  220.             void begin();

  221.             void begin(uint8_t);

  222.             void begin(int);

  223.             void beginTransmission(uint8_t);

  224.             //void beginTransmission(int);

  225.             uint8_t endTransmission(uint16_t timeout=0);

  226.             void nbendTransmission(void (*function)(int)) ;

  227.             uint8_t requestFrom(uint8_t, int, uint16_t timeout=0);

  228.             //uint8_t requestFrom(int, int);

  229.             void nbrequestFrom(uint8_t, int, void (*function)(int));

  230.             void send(uint8_t);

  231.             void send(uint8_t*, uint8_t);

  232.             //void send(int);

  233.             void send(char*);

  234.             uint8_t available(void);

  235.             uint8_t receive(void);

  236.             void onReceive(void (*)(int));

  237.             void onRequest(void (*)(void));

  238.     };

  239. 

  240.     #define TWI_READY   0

  241.     #define TWI_MRX     1

  242.     #define TWI_MTX     2

  243.     #define TWI_SRX     3

  244.     #define TWI_STX     4

  245. 

  246.     #define TW_WRITE    0

  247.     #define TW_READ     1

  248. 

  249.     #define TW_MT_SLA_NACK      0x20

  250.     #define TW_MT_DATA_NACK     0x30

  251. 

  252.     #define CPU_FREQ            16000000L

  253.     #define TWI_FREQ            100000L

  254.     #define TWI_BUFFER_LENGTH   32

  255. 

  256.     /* TWI Status is in TWSR, in the top 5 bits: TWS7 - TWS3 */

  257. 

  258.     #define TW_STATUS_MASK              (_BV(TWS7)|_BV(TWS6)|_BV(TWS5)|_BV(TWS4)|_BV(TWS3))

  259.     #define TW_STATUS                   (TWSR & TW_STATUS_MASK)

  260.     #define TW_START                    0x08

  261.     #define TW_REP_START                0x10

  262.     #define TW_MT_SLA_ACK               0x18

  263.     #define TW_MT_SLA_NACK              0x20

  264.     #define TW_MT_DATA_ACK              0x28

  265.     #define TW_MT_DATA_NACK             0x30

  266.     #define TW_MT_ARB_LOST              0x38

  267.     #define TW_MR_ARB_LOST              0x38

  268.     #define TW_MR_SLA_ACK               0x40

  269.     #define TW_MR_SLA_NACK              0x48

  270.     #define TW_MR_DATA_ACK              0x50

  271.     #define TW_MR_DATA_NACK             0x58

  272.     #define TW_ST_SLA_ACK               0xA8

  273.     #define TW_ST_ARB_LOST_SLA_ACK      0xB0

  274.     #define TW_ST_DATA_ACK              0xB8

  275.     #define TW_ST_DATA_NACK             0xC0

  276.     #define TW_ST_LAST_DATA             0xC8

  277.     #define TW_SR_SLA_ACK               0x60

  278.     #define TW_SR_ARB_LOST_SLA_ACK      0x68

  279.     #define TW_SR_GCALL_ACK             0x70

  280.     #define TW_SR_ARB_LOST_GCALL_ACK    0x78

  281.     #define TW_SR_DATA_ACK              0x80

  282.     #define TW_SR_DATA_NACK             0x88

  283.     #define TW_SR_GCALL_DATA_ACK        0x90

  284.     #define TW_SR_GCALL_DATA_NACK       0x98

  285.     #define TW_SR_STOP                  0xA0

  286.     #define TW_NO_INFO                  0xF8

  287.     #define TW_BUS_ERROR                0x00

  288. 

  289.     //#define _MMIO_BYTE(mem_addr) (*(volatile uint8_t *)(mem_addr))

  290.     //#define _SFR_BYTE(sfr) _MMIO_BYTE(_SFR_ADDR(sfr))

  291. 

  292.     #ifndef sbi // set bit

  293.         #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))

  294.     #endif // sbi

  295. 

  296.     #ifndef cbi // clear bit

  297.         #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))

  298.     #endif // cbi

  299. 

  300.     extern TwoWire Wire;

  301. 

  302. #endif // I2CDEV_IMPLEMENTATION == I2CDEV_BUILTIN_NBWIRE

  303. 

  304. #endif /* _I2CDEV_H_ */