MCU for NFC transportation payment

[dizgah]

In USA, CHINA, IRAN and even twenty thousand leagues under the sea, words have the same meaning ,I read that case on the mifare's website.
any way i think export controls are contain mifare plus too.
these companies does not provide any support to Iranian customers,then i will be appreciate you for any help in this field.
whats your meaning from SDK? PCD chip's SDK (NFCReaderLibrary)do you mean? or other SDK?

thank for your interest to this topic.

[Marco]

That library is a good start. There are export controlled versions of that library, is that the one you will need? Will they give it to you? When they recommend these cards for transportation they presumably factor in their own ecosystem, including stuff like SAM, which you won't necessarily have access to because of export restrictions (or maybe you do, ask NXP).

[dizgah]

whats differences there are between publicly published library and export controlled versions?is this differences ,effective in field of our interest?
As I said there are no support,no request answering and ....
Then i don't think they give us that export controlled version therefor SAM is a complete dream.

[dizgah]

Hi every one
I am using KEIL RTX RTOS which used pre-emptive round robin scheduler.I have a LCD for displaying data and a few tasks have access to this LCD(there are some other tasks also),These tasks need fixed time for handling the LCD(e.g. first task handle LCD for displaying it's data for 50 seconds and after 50 seconds,second task handle and displays it's data for 10 seconds). I know i must use mutex for managing accessing to LCD.but i dont know how i must manage its for fixed times?LCD tasks are in the lowest priority and if there are not any other task to execution these tasks will be execute for displaying messages.
EDIT:
Seems i must use virtual timers.

[nctnico]

I don't want to derail the technical content of this thread: I have been in London recently and over there you can use NFC enabled credit and debit cards to check in/out of the public transport. That works quite well so it could be any idea to consider. Perhaps a credit card company or bank can provide some leverage on getting something like this implemented.

[dizgah]

I don't want to derail the technical content of this thread: I have been in London recently and over there you can use NFC enabled credit and debit cards to check in/out of the public transport. That works quite well so it could be any idea to consider. Perhaps a credit card company or bank can provide some leverage on getting something like this implemented.

First you must prove yourself to them and without good knowledge and ready sample devices there is no chance,TNX for reply.

[dizgah]

I'm using K4S561632C 256Mbit SDRAM for increasing MCU's memory,but i found this lines in the SDRAM's initialing library which deliver  me with product:

    #define SDRAM_BASE_ADDR      0xA0000000
    #define SDRAM_SIZE           0x01000000   /* 16M 128Mbit 1024*1024*16 byte */                         

but as i said above it is 256Mbit memory while SDRAM_Size refer to 128Mbit memory.can any one please clear me ?