From 5631a560323044b832113ef8febba58edcca9435 Mon Sep 17 00:00:00 2001
From: Roel Verdult <roel@libnfc.org>
Date: Wed, 3 Jun 2009 08:11:28 +0000
Subject: [PATCH] Adding ARYGON ADRA-USB/ADRB-USB reader support, part 2

---
 src/dev_arygon.c | 139 +++++++++++++++++++++++++++++++++++++++++++++++
 src/dev_arygon.h |  35 ++++++++++++
 2 files changed, 174 insertions(+)
 create mode 100644 src/dev_arygon.c
 create mode 100644 src/dev_arygon.h

diff --git a/src/dev_arygon.c b/src/dev_arygon.c
new file mode 100644
index 0000000..63da211
--- /dev/null
+++ b/src/dev_arygon.c
@@ -0,0 +1,139 @@
+/*
+ 
+Public platform independent Near Field Communication (NFC) library
+Copyright (C) 2009, Roel Verdult
+ 
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "dev_arygon.h"
+#include "rs232.h"
+#include "bitutils.h"
+
+#ifdef _WIN32
+  #define SERIAL_STRING "COM"
+#endif
+#ifdef _LINUX
+  #define SERIAL_STRING "/dev/ttyusb"
+#endif
+#ifdef __APPLE__
+  #define SERIAL_STRING "/dev/tty.SLAB_USBtoUART"
+#endif
+
+#define BUFFER_LENGTH 256
+#define USB_TIMEOUT   30000
+static byte abtTxBuf[BUFFER_LENGTH] = { 0x32, 0x00, 0x00, 0xff }; // Every packet must start with "00 00 ff"
+
+dev_info* dev_arygon_connect(const ui32 uiIndex)
+{
+  ui32 uiDevNr;
+  serial_port sp;
+  char acConnect[BUFFER_LENGTH];
+  dev_info* pdi = INVALID_DEVICE_INFO;
+  
+#ifdef _LIBNFC_VERBOSE_
+  printf("Trying to find ARYGON device on serial port: %s#\n",SERIAL_STRING);
+#endif
+  
+  // I have no idea how MAC OS X deals with multiple devices, so a quick workaround
+  for (uiDevNr=0; uiDevNr<MAX_DEVICES; uiDevNr++)
+  {
+    #ifdef __APPLE__
+      strcpy(acConnect,SERIAL_STRING);
+      sp = rs232_open(acConnect);
+    #else
+      sprintf(acConnect,"%s%d",SERIAL_STRING,uiDevNr);
+      sp = rs232_open(acConnect);
+    #endif
+    if ((sp != INVALID_SERIAL_PORT) && (sp != CLAIMED_SERIAL_PORT)) break;
+    #ifdef _LIBNFC_VERBOSE_
+      if (sp == INVALID_SERIAL_PORT) printf("invalid serial port: %s\n",acConnect);
+      if (sp == CLAIMED_SERIAL_PORT) printf("serial port already claimed: %s\n",acConnect);
+    #endif
+  }
+  // Test if we have found a device
+  if (uiDevNr == MAX_DEVICES) return INVALID_DEVICE_INFO;
+  
+#ifdef _LIBNFC_VERBOSE_
+  printf("Succesfully connected to: %s\n",acConnect);
+#endif
+  
+  // We have a connection
+  pdi = malloc(sizeof(dev_info));
+  strcpy(pdi->acName,"ARYGON");
+  pdi->ct = CT_PN532;
+  pdi->ds = (dev_spec)sp;
+  pdi->bActive = true;
+  pdi->bCrc = true;
+  pdi->bPar = true;
+  pdi->ui8TxBits = 0;
+  return pdi;
+}                                                                                          
+
+void dev_arygon_disconnect(dev_info* pdi)
+{
+  rs232_close((serial_port)pdi->ds);
+  free(pdi);
+}                                        
+
+bool dev_arygon_transceive(const dev_spec ds, const byte* pbtTx, const ui32 uiTxLen, byte* pbtRx, ui32* puiRxLen)
+{
+  byte abtRxBuf[BUFFER_LENGTH];
+  ui32 uiRxBufLen = BUFFER_LENGTH;
+  ui32 uiPos;
+    
+  // Packet length = data length (len) + checksum (1) + end of stream marker (1)
+  abtTxBuf[4] = uiTxLen;                                                                
+  // Packet length checksum 
+  abtTxBuf[5] = BUFFER_LENGTH - abtTxBuf[4];                                                  
+  // Copy the PN53X command into the packet buffer
+  memmove(abtTxBuf+6,pbtTx,uiTxLen);
+  
+  // Calculate data payload checksum
+  abtTxBuf[uiTxLen+6] = 0;                   
+  for(uiPos=0; uiPos < uiTxLen; uiPos++) 
+  {
+    abtTxBuf[uiTxLen+6] -= abtTxBuf[uiPos+6];
+  }
+  
+  // End of stream marker
+  abtTxBuf[uiTxLen+7] = 0;        
+  
+#ifdef _LIBNFC_VERBOSE_
+  printf("Tx: ");
+  print_hex(abtTxBuf,uiTxLen+8);
+#endif
+  if (!rs232_send((serial_port)ds,abtTxBuf,uiTxLen+8)) return false;
+
+  if (!rs232_receive((serial_port)ds,abtRxBuf,&uiRxBufLen)) return false;
+  
+
+#ifdef _LIBNFC_VERBOSE_
+  printf("Rx: ");
+  print_hex(abtRxBuf,uiRxBufLen);
+#endif
+  
+  // When the answer should be ignored, just return a succesful result    
+  if(pbtRx == null || puiRxLen == null) return true;
+
+  // Only succeed when the result is at least 00 00 ff 00 ff 00 00 00 FF xx Fx Dx xx .. .. .. xx 00 (x = variable)
+  if(uiRxBufLen < 15) return false;
+  
+  // Remove the preceding and appending bytes 00 00 ff 00 ff 00 00 00 FF xx Fx .. .. .. xx 00 (x = variable)
+  *puiRxLen = uiRxBufLen - 15;
+  memcpy(pbtRx, abtRxBuf+13, *puiRxLen);
+  
+  return true;
+}
diff --git a/src/dev_arygon.h b/src/dev_arygon.h
new file mode 100644
index 0000000..a1dfd2d
--- /dev/null
+++ b/src/dev_arygon.h
@@ -0,0 +1,35 @@
+/*
+ 
+Public platform independent Near Field Communication (NFC) library
+Copyright (C) 2009, Roel Verdult
+ 
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#ifndef _LIBNFC_DEV_ARYGON_H_
+#define _LIBNFC_DEV_ARYGON_H_
+
+#include "defines.h"
+#include "types.h"
+
+// Functions used by developer to handle connection to this device
+dev_info* dev_arygon_connect(const ui32 uiIndex);
+void dev_arygon_disconnect(dev_info* pdi);
+
+// Callback function used by libnfc to transmit commands to the PN53X chip
+bool dev_arygon_transceive(const dev_spec ds, const byte* pbtTx, const ui32 uiTxLen, byte* pbtRx, ui32* puiRxLen);
+
+#endif // _LIBNFC_DEV_ARYGON_H_
+