This is a RFID based attendance system. The current program is only for two users but can be easily scaled for more users. Apart from FRDM-K64F board, we have MFRC522, Nokia 5110 LCD and SD card as external hardware. Each time a legitimate card is flashed the name of the person will be displayed on the LCD and his information will be stored in SD card if it's already not there. I have used existing libraries for all the harware. Here is the list. MFRC522 - By Martin Olejar SDFileSystem - By Andrew Lindsay NOKIA_5110 - By Chris Yan.
Dependencies: MFRC522 NOKIA_5110 SDFileSystem mbed
Fork of FTF2014_lab4 by
Diff: main.cpp
- Revision:
- 0:a83db87be46c
- Child:
- 3:ade6c26d1b90
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Apr 03 09:05:13 2014 +0000 @@ -0,0 +1,38 @@ +#include "mbed.h" +#include "SDFileSystem.h" + +SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd"); // MOSI, MISO, SCK, CS +Serial pc(USBTX, USBRX); +FILE *fp; +char buffer[1024]; + +int main() { + pc.printf("Initializing \n"); + wait(2); + + fp = fopen("/sd/hello.txt", "r"); + if (fp != NULL) { + fclose(fp); + remove("/sd/hello.txt"); + pc.printf("Remove an existing file with the same name \n"); + } + + printf("\nWriting data to the sd card \n"); + fp = fopen("/sd/hello.txt", "w"); + if (fp == NULL) { + pc.printf("Unable to write the file \n"); + } else { + fprintf(fp, "mbed SDCard application!"); + fclose(fp); + pc.printf("File successfully written! \n"); + } + + printf("\nReading data from the SD card. \n"); + fp = fopen("/sd/hello.txt", "r"); + if (fp != NULL) { + int size = fread(buffer, sizeof(char), 1024, fp); + printf("Number of data read: %d, text from hello.txt file: %s \n", size, buffer); + fclose(fp); + } + printf("End of Lab 4. \n"); +}