Diff: SmartCardReader.cpp

Revision:

0:5bf6fcf71548

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SmartCardReader.cpp	Sun Feb 27 22:20:40 2011 +0000
@@ -0,0 +1,130 @@
+/*
+This file encapsulates logic for SmartCard Reader
+
+Author: Calin Bira
+Date: 28.02.2011
+*/
+
+#include "SmartCardReader.h"
+
+SmartCardReader::SmartCardReader(Serial *_dut, DigitalOut *_vcc, DigitalOut *_rst,PwmOut *_clock, char *_format)
+    {
+        int databits,stopbits;
+        Serial::Parity parity;
+        
+        freq = 1000*1000;
+        divfact = 372;
+                
+        dut = _dut;
+        rst = _rst;
+        vcc = _vcc;
+        clk = _clock;
+        
+        BytesToIgnore = 0;
+        ReceiveBufferIndex = 0;
+                
+        databits = _format[0] - '0';
+        switch (_format[1])
+        {
+            case 'E': {parity = Serial::Even; break;}
+            case 'O': {parity = Serial::Odd; break;}
+            default: {parity = Serial::None; break;}
+        }
+        
+        stopbits = _format[2] - '0';
+        dut->format(databits,parity,stopbits);
+        
+        setClock(freq);
+        clk->write(0.5);// 50% duty cycle
+        
+        
+    }
+    
+void SmartCardReader::setClock(int Hz)
+    {
+        freq = Hz;
+        clk->period_us(1000*1000/freq);
+        dut->baud(freq/divfact);
+    }
+
+void SmartCardReader::cold_reset()
+    {
+        *vcc = 0;
+        *rst = 0;
+        wait(0.1);
+        *vcc = 1;
+        wait(0.1);
+        
+        while (dut->readable())
+            dut->getc();
+        *rst = 1;
+    }
+    
+void SmartCardReader::warm_reset()
+    {
+        *rst = 0;
+        wait(0.1);
+        *rst = 1;
+    }
+
+/*    
+void SmartCardReader::Relay_PC_SC()
+        {
+            static char ignore=0;
+            
+            while (dut->readable()) //if there is data from smartcard
+            {
+                if (ignore>0)
+                {
+                    dut->getc();//ignore data: this is data from pc
+                    ignore--;
+                }
+                else pc->putc(dut->getc());//send to pc
+            }
+            
+            while (pc->readable()) //if there is data from pc
+            {
+                ignore++;
+                dut->putc(pc->getc());  //send data to smartcard
+            }    
+        }
+*/
+void SmartCardReader::send(char *buf, int len)
+{
+    while(len-- >0)
+    {
+        BytesToIgnore++;
+        dut->putc(*buf++);
+    }
+}
+
+int SmartCardReader::receive(char *buf)
+{
+    int OldIndex = ReceiveBufferIndex;
+    for (int i=0; i < ReceiveBufferIndex; i++)
+    {
+        buf[i] =  ReceiveBuffer[i];
+    }
+    ReceiveBufferIndex = 0;
+    return OldIndex;
+}
+
+void SmartCardReader::doEvents()
+    {
+        //Relay_PC_SC();
+          
+            while (dut->readable()) //if there is data from smartcard
+            {
+                if (BytesToIgnore > 0)
+                {
+                    dut->getc();//ignore data: this is data from previous send
+                    BytesToIgnore--;
+                }
+                else 
+                {
+                    if (ReceiveBufferIndex < ReceiveBufferLen)
+                        ReceiveBuffer[ReceiveBufferIndex++] = dut->getc();
+                    else dut->getc();//discard data, no space in buffer
+                }
+            }  
+    }