yo lo hare con ibutton. Tambien estuve viendo el ejemplo, aunque pone que usa 3 pic??o es que tu coges el que quieras. yo solo quiero leer. Y el esquema de donde las sacado?
cuanto cuesta lo de la huella dactilar, economico¡¡
/////////////////////////////////////////////////////////////////////////
//// EX_TOUCH.C ////
//// ////
//// This program interfaces a Dallas DS1991 touch memory device. ////
//// It will display the family code and ID of any device that ////
//// "touch"es pin B0. ////
//// ////
//// Configure the CCS prototype card as follows: ////
//// Connect pin B0 through a 4.7K resistor to +5V ////
//// Connect the touch device to GND and then "Touch" to pin B0 ////
//// ////
//// Jumpers: ////
//// PCB pin A2 to RS232 RX, pin A3 to RS232 TX ////
//// PCM,PCH pin C7 to RS232 RX, pin C6 to RS232 TX ////
//// ////
//// This example will work with the PCB, PCM and PCH compilers. ////
//// The following conditional compilation lines are used to ////
//// include a valid device for each compiler. Change the device, ////
//// clock and RS232 pins for your hardware if needed. ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////
ESTO NO LO ENTIENDO, IF DEFINE PCB INCLUDE 16C56, Y LUEGO EL PCM USA OTRO y para PCH OTRO. NO se cual tengo que usar¡¡
#if defined(__PCB__)
#include <16C56.h>
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_A3, rcv=PIN_A2)
#elif defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#elif defined(__PCH__)
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#endif
#include <touch.c>
void main() {
BYTE buffer[8];
BYTE i;
printf("\r\nWaiting for a touch device...\r\n");
while (TRUE) {
while(!touch_present()) ;
delay_ms(200);
if(touch_present()) {
touch_write_byte(0x33);
for(i=0;i<8;++i)
buffer=touch_read_byte();
printf("Family: %2X ID: ",buffer[0]);
for(i=6;i!=0;--i)
printf("%2X",buffer);
printf("\r\n");
delay_ms(1000);
}
}
}
