Paul van der Wielen
rfid lock build to interface with mf7 rfid reader using white / black list
Diff: main.cpp
- Revision:
- 0:c9e183da8303
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Feb 09 07:44:59 2011 +0000
@@ -0,0 +1,342 @@
+/*
+ * Copyright (c) 2011 Paul van der Wielen, Pro-Serv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to use
+ * and implement the software for none commercial reason and usage only and
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * Usage and assumptions:
+ * a RFID reader Model MF7(1.05) is configured in ascii mode and attached to p10 via
+ * a level converter (rs232 at ttl level to 3.3V), which also inverses the signal
+ * The imbedded local drive holds a white list and black list file in csv format.
+ * Operation signalling is available via default LED 1-4 being:
+ * LED1 - access granted, LED2 - access denied, LED3 - door unlocked, LED4 - file reading
+ *
+ * the white list master card should be at white[0], being first entry in white list csv file
+ * while the black list master card should be at white[1], being second entry in white list csv
+ * file, mind these two card DON'T provide access and/or door unlocking operations
+ *
+ * Used device = LPC1768, basic logging is availabe as needed on the serial to usb port via
+ * terminal emulator like Tera, extend logging or debugging data is available by uncomment
+ * the #define DEBUG statement
+ */
+
+#include "mbed.h"
+#include <string.h>
+
+//#define DEBUG
+
+Serial pc(USBTX, USBRX); // tx, rx
+Serial device(p9, p10); // tx, rx
+LocalFileSystem local("local");
+
+const char *wl = "/local/list_wht.csv";
+const char *bl = "/local/list_blk.csv";
+
+const char *ver = "V1.1";
+
+/*
+ * In order to assure proper white & black list operation we assume to
+ * have the master card for white & black list to be at index 0 and 1 resp.
+ */
+unsigned long white[256] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0
+ };
+
+unsigned long black[64] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
+ 0,0,0,0,0,0,0,0,0,0,0,0,0
+ };
+
+unsigned int hex2int(char a);
+bool rfid_match_wl( unsigned long b);
+bool rfid_match_bl( unsigned long b);
+int add_card(const char *ft, char *xx);
+int get_list(const char *ft, unsigned long *xx);
+
+void memdump( char *p, int n );
+
+char rfid[10];
+char buffer[32];
+
+unsigned char tmp;
+int cnt = 0;
+int pnt = 0;
+int mst = 0; // usage format abxxxxxn where a = white, b = black operation, n indicates second step
+
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+DigitalOut myled4(LED4);
+
+int main() {
+
+#ifdef DEBUG
+ char mem[ 1024 ]; // memory, it should be aligned to word boundary
+#endif
+
+ float release = 7.0;
+ unsigned long val = 0;
+
+ printf( "\r\nRFID Lock System, version: %s\r\n", ver);
+ printf( " CPU running %dkHz\r\n", SystemCoreClock / 1000 );
+
+ cnt = get_list(wl, white);
+#ifdef DEBUG
+ memcpy(&mem, &white, 1024);
+
+ printf( "Showing `White List` content ...\r\n" );
+ memdump( mem, 256 * 4 );
+#endif
+ printf( "Started with %d known RFID 'White list' cards\r\n\n", cnt);
+
+ cnt = get_list(bl, black);
+#ifdef DEBUG
+ memcpy(&mem, &black, 256);
+
+ printf( "Showing `Black List` content ...\r\n" );
+ memdump( mem, 256 * 1 );
+#endif
+ printf( "Started with %d known RFID 'Black list' cards\r\n\n", cnt);
+
+ while (1) {
+ if (device.readable()) {
+ tmp = device.getc();
+ switch (tmp) {
+ case 0x02:
+ cnt = 0;
+ val = 0;
+ break;
+ case 0x03:
+ rfid[cnt++] = 0x00;
+ val = strtoul(rfid, 0, 16);
+#ifdef DEBUG
+ pc.printf("%s %u", rfid, val ); // define for debug mode
+#endif
+ pc.printf("%s", rfid );
+ if ((rfid_match_wl(val)) && !(rfid_match_bl(val)) && (mst == 0x00)) {
+ // green led - access provided
+ myled1 = 1;
+ // activate lock for 'release' time duration
+ myled3 = 1;
+ // we will need to add a defenition for DigitalOut here
+ wait(0.25);
+ myled1 = 0;
+ wait(release-0.25);
+ myled3 = 0;
+ // we will need to add a defenition for DigitalOut here
+ pc.printf(" -> Granted\r\n" );
+ } else {
+ if (mst == 0x81) {
+ // master mode, add new card to white list
+ white[cnt++] = val;
+ mst = 0;
+ pc.printf(" -> Card added\r\n" );
+ if (add_card(wl, rfid) != 0) {
+ pc.printf("%s -> WL Add Failed\r\n", rfid );
+ }
+ } else if (mst == 0x41) {
+ // master mode, add new card to white list
+ black[cnt++] = val;
+ mst = 0;
+ pc.printf(" -> Card Removed\r\n" );
+ if (add_card(bl, rfid) != 0) {
+ pc.printf("%s -> BL Remove Failed\r\n", rfid );
+ }
+ } else {
+ // red led - no access
+ myled2 = 1;
+ wait(0.25);
+ myled2 = 0;
+ if (mst == 0x80) {
+ pc.printf(" -> White List Mode!\r\n");
+ } else if (mst == 0x40) {
+ pc.printf(" -> Black List Mode!\r\n");
+ } else {
+ pc.printf(" -> Denied !\r\n" );
+ }
+ }
+ }
+ break;
+ case 0x0a:
+ case 0x0d:
+ break;
+ default:
+ // data from MF7 (ascii mode) is in `litle endian` format, so need
+ // to swap groups but, we will store rfid card as a value
+ // char array addressing = [group + count - count offset]
+ switch (cnt) {
+ case 0x00:
+ case 0x01:
+ rfid[6 + cnt] = tmp;
+ break;
+ case 0x02:
+ case 0x03:
+ rfid[4 + cnt - 2] = tmp;
+ break;
+ case 0x04:
+ case 0x05:
+ rfid[2 + cnt - 4] = tmp;
+ break;
+ case 0x06:
+ case 0x07:
+ rfid[0 + cnt - 6] = tmp;
+ break;
+ }
+ cnt++;
+ }
+ }
+ }
+}
+/*
+ * All used functions are listed below
+ *
+ * function to add a card to selected list (black or white)
+ */
+int add_card(const char *ft, char *xx) {
+
+ FILE *fp;
+
+ if ((fp = fopen(ft, "a")) == NULL) {
+ fprintf(stderr, "File %s could not be opened!\r\n", ft);
+ return -1;
+ }
+ fprintf(fp,"%s\r\n", xx);
+ fclose(fp);
+ return 0;
+}
+
+/*
+ * function to read initial content for selected list (black or white)
+ */
+int get_list(const char *ft, unsigned long *xx) {
+
+ FILE *fp;
+
+ if ((fp = fopen(ft, "r")) == NULL) {
+ fprintf(stderr, "File %s could not be opened!\r\n", ft);
+ return 0;
+ } else {
+ cnt = pnt = 0;
+ printf("Reading Data File...\r\n");
+ // reading file content
+ while ((tmp = getc(fp)) != 0xff) {
+ switch (tmp) {
+ case 0x0d:
+ myled4 = 1;
+ rfid[pnt++] = 0x00;
+ xx[cnt++] = strtoul(rfid, 0, 16);
+#ifdef DEBUG
+ printf( " %s !\r\n", rfid); // define for debug mode
+#endif
+ pnt = 0;
+ myled4 = 0;
+ break;
+ case 0x0a:
+ break;
+ default:
+ rfid[pnt++] = tmp;
+ break;
+ }
+ }
+ printf("Closing Data File...\r\n");
+ fclose(fp);
+ }
+ return cnt;
+}
+
+/*
+ * function to match current card against selected white list
+ */
+bool rfid_match_wl( unsigned long myval) {
+ int i;
+
+ if (( mst == 0x80 ) || ( mst == 0x40 )) {
+ mst++;
+ }
+ for (i = 0; i < sizeof(white)/sizeof(white[0]); i++) {
+ if (white[i] == myval) {
+ // if master card (being first in list) is presented twice ! -> add new card
+ if (( i == 0 ) && (mst == 0)) {
+ mst = 0x80;
+ } else if (( i == 1 ) && (mst == 0)) {
+ mst = 0x40;
+ } else {
+ ;
+ }
+#ifdef DEBUG
+ pc.printf("%u %u\r\n", white[i], i); // define for debug mode
+#endif
+ return true;
+ }
+ }
+ return false;
+}
+
+/*
+ * function to match current card against selected black list
+ */
+bool rfid_match_bl( unsigned long myval) {
+ int i;
+
+ for (i = 0; i < sizeof(black)/sizeof(black[0]); i++) {
+ if (black[i] == myval) {
+ return true;
+ }
+ }
+ return false;
+}
+
+/*
+ * function to convert single character value it's decimal value
+ */
+unsigned int hex2int(char a) {
+ unsigned int val = 0;
+
+ if ((int)a <= 57)
+ val = ((int)a-48);
+ else
+ val = ((int)a-55);
+ return val;
+}
+
+/*
+ * function to dump specific memory block
+ */
+void memdump( char *base, int n ) {
+ unsigned int *p;
+
+ printf( " memdump from 0x%08X for %d bytes", (unsigned long)base, n );
+
+ p = (unsigned int *)((unsigned int)base & ~(unsigned int)0x3);
+
+ for ( int i = 0; i < (n >> 2); i++, p++ ) {
+ if ( !(i % 4) )
+ printf( "\r\n 0x%08X :", (unsigned int)p );
+
+ printf( " 0x%08X", *p );
+ }
+
+ printf( "\r\n" );
+}