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
- Committer:
- dotnfc
- Date:
- 2016-09-13
- Revision:
- 0:db8030e71f55
File content as of revision 0:db8030e71f55:
/* * TwoWire.h * Copyright (c) 2011 Cristian Maglie <c.maglie@bug.st>. * All rights reserved. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef TwoWire_h #define TwoWire_h // Include Atmel CMSIS driver //#include <include/twi.h> #include "Stream.h" #include "variant.h" #define BUFFER_LENGTH 32 class TwoWire : public Stream { public: TwoWire(I2C_TypeDef *twi); void begin(); void begin(uint8_t); void begin(int); void beginTransmission(uint8_t); void beginTransmission(int); uint8_t endTransmission(void); uint8_t endTransmission(uint8_t); uint8_t requestFrom(uint8_t, uint8_t); uint8_t requestFrom(uint8_t, uint8_t, uint8_t); uint8_t requestFrom(int, int); uint8_t requestFrom(int, int, int); virtual size_t write(uint8_t); virtual size_t write(const uint8_t *, size_t); virtual int available(void); virtual int read(void); virtual int peek(void); virtual void flush(void); void onReceive(void(*)(int)); void onRequest(void(*)(void)); inline size_t write(unsigned long n) { return write((uint8_t)n); } inline size_t write(long n) { return write((uint8_t)n); } inline size_t write(unsigned int n) { return write((uint8_t)n); } inline size_t write(int n) { return write((uint8_t)n); } using Print::write; void onService(void); private: // RX Buffer uint8_t rxBuffer[BUFFER_LENGTH]; uint8_t rxBufferIndex; uint8_t rxBufferLength; // TX Buffer uint8_t txAddress; uint8_t txBuffer[BUFFER_LENGTH]; uint8_t txBufferLength; // Service buffer uint8_t srvBuffer[BUFFER_LENGTH]; uint8_t srvBufferIndex; uint8_t srvBufferLength; // Callback user functions void (*onRequestCallback)(void); void (*onReceiveCallback)(int); // Called before initialization void (*onBeginCallback)(void); // TWI instance I2C_TypeDef *twi; I2C_InitTypeDef I2C_InitStructure; // TWI state enum TwoWireStatus { UNINITIALIZED, MASTER_IDLE, MASTER_SEND, MASTER_RECV, SLAVE_IDLE, SLAVE_RECV, SLAVE_SEND }; TwoWireStatus status; // TWI clock frequency static const uint32_t TWI_CLOCK = 100000; // Timeouts ( static const uint32_t RECV_TIMEOUT = 100000; static const uint32_t XMIT_TIMEOUT = 100000; }; extern TwoWire Wire; extern TwoWire Wire1; #endif