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I managed to implement the MFRC522. The headerfile is based on #include <main.h>
#include <lcd16216.c>
#define CS PIN_A5
#use rs232( baud=9600, parity=N, xmit=PIN_C6, rcv=PIN_C7, bi ...

Well, the MFRC522 data sheet says the current can go up to 100ma
when the TX outputs are enabled. So the effective load resistance
can be calculated:

R = V/I = 3.3v / 0.1 A = 33 ohms

So your ...

Are you using a resistor divider to try and function as a voltage regulator?
Yes I thought that be sufficient for the first tests.

What are those resistor values ?
1Kohm and 2KOhm

I think Tx1 and TX2 are connected to the antenna , at least that what the library says.

I use the ICD- U40 as power supply and then an easy voltage divider made of two resistors to cut the voltage ...

This chip is giving me the hardest headache ever.

I can read/write but whenever I set the TxControlReg the chip turns off, even the LED on the chip is off and I have to reconnect.

I use the same ...

Yes true, but I swapped them without success.
It so weird because I just hooked up my MC3202-C ADC with SPI and it is running without any problem. So basically SPI seems correct from my point of view ...

https://s8.postimg.org/s73dgztq9/connection.png

I swapped SDO and SDI several time just to make sure thats not the issue.

I had that before and then I decided to use it without functions because I just want to read that one Register to find out where the issue is.

I still changed it and there is no difference :(

#i ...

#include <main.h>
#include <lcd16216.c>
#define VersionReg 0x37

//spi modes
#define SPI_MODE_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H)
#define SPI_MODE_1 (SPI_L_TO_H)
#define SPI_MO ...

Sounds reasonable but didnt change anything unfortunately

Thats all I want to do know because the rest will be selfexplaining once i get to write/read one register.

output_low(CS);
//spi_ ...

Cool beans,

I have another Question. I have an Arduino Mega here and the RFID reader is working perfectly fine. Anyway I need to use PIC16...

First step is reading the firmware version in the sa ...

Honestly that's what programming is ! Reading hundreds of pages of datasheets, spending weeks cutting code, and drinking pots of coffee into the wee hours to LEARN how to use 'chips'. I've got 5+ dec ...

...as for the hardware, just use a 3 volt power supply and keep set the PIC clock at 8MHz. This will interface properly however you might have damaged the RFID device from supplying 5 volts. It's best ...

The 'N' is a standard abbreviation for -ve. The PD input needs to be high, or the whole chip is disabled. However the data sheet suggests that the RST is an _edge triggered_ signal, with a reset trig ...

I had some issues today which I can't fix before Friday :(.

Anyway I am not too sure how to connect the Reset. In this thread he guys claimed RST is connected to ground?
On some other schematics I ...