TRF7970A EVM sample code interfacing with on board MSP430F2370

Thanks fot the information, but right now I'm still trying to understand the code and looking for a JTAG interface. Of both codes, wich one is the parallel one? because the header of the main.c of both zip's says the same , "using a SPI interface" and same date, so I'm confused. An regarding the bluetooth connection, how it is connected? becase the UART pins are already used by the configuration between the MCU and the USB for the PC.

Another question, I also have an msp430 launchpad , can i connect this to the TRF7970A EVM so I no longer need the JTAG interface? And also, how it is done?

And last, maybe it's very basic , but, , of all the code examples, is there one that can make this module act as a card, so a cellphone can recognize it?

Thanks in advance.

Hi. Josh

I just tested your two driver program. But they didn't work with Android Smart Phone.

It looks like that the two codes supports only SPI. But the original TRF7970A-EVM has  parallel interface.

Can you provide a source code which support parallel interface.

Thanks.

Hi Josh...

Dongbeom Shin is right!!! When I'm testing with two codes on my EVM, one of them gets no response,

the rest just card type displaying on LEDs (for card A display 2nd red LED and for card B display 3th orange LED).

But I'm testing with with reader, none of them responses as a card or detecting the card existance.

Which part should I try to change the code EVM to response as a 14443A/14443B card emulation???

Thanks!!!

Brs...

Johnathan, Chen.

Hello Jonathan,

Please see the reference firmware attached for using a MSP430G2553 + TRF7970A  supporting both Card Emulation Type A / B.

 0456.ez430_TRF7970_UART_Card_Emulation_Type_A_or_B.zip

Best regards,

Erick M.

Dear Erick...

Thanks for your information!!! I'll have a try on it.

Brs...

Johnathan, Chen.

Hi

I'm developing a project using TRF7970EVM (MSP430F2370 + TRF7970A). The code you have attached is designed for MSP430G2553 as I see. I would like to know if there is a version for MSP430F2370?

Regards

yep - see attached for parallel and SPI w/SS versions

0211.Card Emulation TRF7970EVM Parallel Mode Jan 7.zip

3362.Card Emulation TRF7970EVM Jan 2013.zip

Hello,

I am trying to get these samples working on the TRF7970EVM with Android devices. I have a problem on setting EVM into emulation state. At the beginning EVM waits for an IRQ, then we read IRQ state register and  NFC target protocol. We expect to get 0xC9 for Type A and 0xC5 for Type B. The problem is that I've used two Android phones, the first one gave me 0x05 and the second one 0xC0. I have never seen 0xC5 on 0xC9. How can I solve this issue? And what does these bytes mean?

Here is the function I am talking about.

/******************************************************************************
 * @brief Waits for a radio IRQ
 * This function will lock the mcu while waiting for IRQ. Note that the
 * microcontroller is not expected to do anything else in BSL
 *
 * @return  none
 *****************************************************************************/
void Radio_Wait_IRQ(void) {
  u08_t Register[4];
  static unsigned char retry_counter = 0;

  // Wait for an IRQ forever
  while (!IRQ_IS_SET())
  {
//    TRF_DISABLE;
    __bis_SR_register(GIE);
  }

  if (g_i2c_busy_flag  == TRUE_s) {
    NFC_State = POWER_OFF_STATE;
    return;
  }

  do {
    // Clear Buffer
    Register[0] = IRQ_STATUS;
    Trf797xReadCont(Register, 2); /* IRQ status register address */
//    Trf796xReadSingle(&Register[0], 1);

    Register[2] = NFC_TARGET_PROTOCOL;
    Trf797xReadSingle(&Register[2], 1);

#if CARD_EMULATION_TYPE_A
    if (Register[2] == 0xC9) {
#endif
#if CARD_EMULATION_TYPE_B
      if (Register[2] == 0xC5) {
#endif
      retry_counter = 0;
      Radio_Process_IRQ(Register[0]);
       break;
    }
    //
    // Reset the TRF7970 when :
    // 1. Target Protocol Register has the RF_h and RF_l enabled but incorrect bit rate ( not 106 kbps)
    // 2. Target Protocol Register
    //
    else if (((Register[2]) & 0x0F) != 0x00 || Register[2] == 0xC0 || Register[2] == 0x40 || Register[1] != 0x3E) {
      Trf797xInitialSettings();
      NFC_State = SENSE_STATE;
    }
    else if( Register[2] == 0x80)
    {
      Trf797xInitialSettings();
    }
    else
    {
      //
      // Increment retry counter, once it reaches 10 then reset
      //
      retry_counter++;
      if(retry_counter == 10)
      {
        retry_counter = 0;
        Trf797xInitialSettings();
      }
      NFC_State = SENSE_STATE;
    }

  } while (IRQ_IS_SET() && g_i2c_busy_flag == FALSE_s);

  return;
}

Hi, Ralph.

I am getting a controversial information here. In this thread were already posted source codes for firmware for TRF7970A EVM which implements card emulation. So it looks for me like it is possible.