dotnfc Tang / LibPN532

PN532 Driver library This library provides an abstract API to drive the pn532 nfc chip, with I2C/HSU/SPI interface. Its based on the Seeed Studio's Arduino version.

Dependents:   PN532_ReadUid Nfctest2

Wire.h@0:db8030e71f55, 2016-09-13 (annotated)

Committer:
dotnfc
Date:
Tue Sep 13 06:01:19 2016 +0000
Revision:
0:db8030e71f55
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dotnfc 0:db8030e71f55 1 /*
dotnfc 0:db8030e71f55 2 * TwoWire.h
dotnfc 0:db8030e71f55 3 * Copyright (c) 2011 Cristian Maglie <c.maglie@bug.st>.
dotnfc 0:db8030e71f55 4 * All rights reserved.
dotnfc 0:db8030e71f55 5 *
dotnfc 0:db8030e71f55 6 * This library is free software; you can redistribute it and/or
dotnfc 0:db8030e71f55 7 * modify it under the terms of the GNU Lesser General Public
dotnfc 0:db8030e71f55 8 * License as published by the Free Software Foundation; either
dotnfc 0:db8030e71f55 9 * version 2.1 of the License, or (at your option) any later version.
dotnfc 0:db8030e71f55 10 *
dotnfc 0:db8030e71f55 11 * This library is distributed in the hope that it will be useful,
dotnfc 0:db8030e71f55 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
dotnfc 0:db8030e71f55 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dotnfc 0:db8030e71f55 14 * Lesser General Public License for more details.
dotnfc 0:db8030e71f55 15 *
dotnfc 0:db8030e71f55 16 * You should have received a copy of the GNU Lesser General Public
dotnfc 0:db8030e71f55 17 * License along with this library; if not, write to the Free Software
dotnfc 0:db8030e71f55 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
dotnfc 0:db8030e71f55 19 */
dotnfc 0:db8030e71f55 20
dotnfc 0:db8030e71f55 21 #ifndef TwoWire_h
dotnfc 0:db8030e71f55 22 #define TwoWire_h
dotnfc 0:db8030e71f55 23
dotnfc 0:db8030e71f55 24 // Include Atmel CMSIS driver
dotnfc 0:db8030e71f55 25 //#include <include/twi.h>
dotnfc 0:db8030e71f55 26
dotnfc 0:db8030e71f55 27 #include "Stream.h"
dotnfc 0:db8030e71f55 28 #include "variant.h"
dotnfc 0:db8030e71f55 29
dotnfc 0:db8030e71f55 30 #define BUFFER_LENGTH 32
dotnfc 0:db8030e71f55 31
dotnfc 0:db8030e71f55 32 class TwoWire : public Stream {
dotnfc 0:db8030e71f55 33 public:
dotnfc 0:db8030e71f55 34 TwoWire(I2C_TypeDef *twi);
dotnfc 0:db8030e71f55 35 void begin();
dotnfc 0:db8030e71f55 36 void begin(uint8_t);
dotnfc 0:db8030e71f55 37 void begin(int);
dotnfc 0:db8030e71f55 38 void beginTransmission(uint8_t);
dotnfc 0:db8030e71f55 39 void beginTransmission(int);
dotnfc 0:db8030e71f55 40 uint8_t endTransmission(void);
dotnfc 0:db8030e71f55 41 uint8_t endTransmission(uint8_t);
dotnfc 0:db8030e71f55 42 uint8_t requestFrom(uint8_t, uint8_t);
dotnfc 0:db8030e71f55 43 uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
dotnfc 0:db8030e71f55 44 uint8_t requestFrom(int, int);
dotnfc 0:db8030e71f55 45 uint8_t requestFrom(int, int, int);
dotnfc 0:db8030e71f55 46 virtual size_t write(uint8_t);
dotnfc 0:db8030e71f55 47 virtual size_t write(const uint8_t *, size_t);
dotnfc 0:db8030e71f55 48 virtual int available(void);
dotnfc 0:db8030e71f55 49 virtual int read(void);
dotnfc 0:db8030e71f55 50 virtual int peek(void);
dotnfc 0:db8030e71f55 51 virtual void flush(void);
dotnfc 0:db8030e71f55 52 void onReceive(void(*)(int));
dotnfc 0:db8030e71f55 53 void onRequest(void(*)(void));
dotnfc 0:db8030e71f55 54
dotnfc 0:db8030e71f55 55 inline size_t write(unsigned long n) { return write((uint8_t)n); }
dotnfc 0:db8030e71f55 56 inline size_t write(long n) { return write((uint8_t)n); }
dotnfc 0:db8030e71f55 57 inline size_t write(unsigned int n) { return write((uint8_t)n); }
dotnfc 0:db8030e71f55 58 inline size_t write(int n) { return write((uint8_t)n); }
dotnfc 0:db8030e71f55 59 using Print::write;
dotnfc 0:db8030e71f55 60
dotnfc 0:db8030e71f55 61 void onService(void);
dotnfc 0:db8030e71f55 62
dotnfc 0:db8030e71f55 63 private:
dotnfc 0:db8030e71f55 64 // RX Buffer
dotnfc 0:db8030e71f55 65 uint8_t rxBuffer[BUFFER_LENGTH];
dotnfc 0:db8030e71f55 66 uint8_t rxBufferIndex;
dotnfc 0:db8030e71f55 67 uint8_t rxBufferLength;
dotnfc 0:db8030e71f55 68
dotnfc 0:db8030e71f55 69 // TX Buffer
dotnfc 0:db8030e71f55 70 uint8_t txAddress;
dotnfc 0:db8030e71f55 71 uint8_t txBuffer[BUFFER_LENGTH];
dotnfc 0:db8030e71f55 72 uint8_t txBufferLength;
dotnfc 0:db8030e71f55 73
dotnfc 0:db8030e71f55 74 // Service buffer
dotnfc 0:db8030e71f55 75 uint8_t srvBuffer[BUFFER_LENGTH];
dotnfc 0:db8030e71f55 76 uint8_t srvBufferIndex;
dotnfc 0:db8030e71f55 77 uint8_t srvBufferLength;
dotnfc 0:db8030e71f55 78
dotnfc 0:db8030e71f55 79 // Callback user functions
dotnfc 0:db8030e71f55 80 void (*onRequestCallback)(void);
dotnfc 0:db8030e71f55 81 void (*onReceiveCallback)(int);
dotnfc 0:db8030e71f55 82
dotnfc 0:db8030e71f55 83 // Called before initialization
dotnfc 0:db8030e71f55 84 void (*onBeginCallback)(void);
dotnfc 0:db8030e71f55 85
dotnfc 0:db8030e71f55 86 // TWI instance
dotnfc 0:db8030e71f55 87 I2C_TypeDef *twi;
dotnfc 0:db8030e71f55 88 I2C_InitTypeDef I2C_InitStructure;
dotnfc 0:db8030e71f55 89
dotnfc 0:db8030e71f55 90 // TWI state
dotnfc 0:db8030e71f55 91 enum TwoWireStatus {
dotnfc 0:db8030e71f55 92 UNINITIALIZED,
dotnfc 0:db8030e71f55 93 MASTER_IDLE,
dotnfc 0:db8030e71f55 94 MASTER_SEND,
dotnfc 0:db8030e71f55 95 MASTER_RECV,
dotnfc 0:db8030e71f55 96 SLAVE_IDLE,
dotnfc 0:db8030e71f55 97 SLAVE_RECV,
dotnfc 0:db8030e71f55 98 SLAVE_SEND
dotnfc 0:db8030e71f55 99 };
dotnfc 0:db8030e71f55 100 TwoWireStatus status;
dotnfc 0:db8030e71f55 101
dotnfc 0:db8030e71f55 102 // TWI clock frequency
dotnfc 0:db8030e71f55 103 static const uint32_t TWI_CLOCK = 100000;
dotnfc 0:db8030e71f55 104
dotnfc 0:db8030e71f55 105 // Timeouts (
dotnfc 0:db8030e71f55 106 static const uint32_t RECV_TIMEOUT = 100000;
dotnfc 0:db8030e71f55 107 static const uint32_t XMIT_TIMEOUT = 100000;
dotnfc 0:db8030e71f55 108 };
dotnfc 0:db8030e71f55 109
dotnfc 0:db8030e71f55 110 extern TwoWire Wire;
dotnfc 0:db8030e71f55 111 extern TwoWire Wire1;
dotnfc 0:db8030e71f55 112
dotnfc 0:db8030e71f55 113
dotnfc 0:db8030e71f55 114 #endif
dotnfc 0:db8030e71f55 115