米6体育平台手机版

SLOA192B April 2014 – March 2019 TRF7970A , TRF7970A

7.2.1 Low-Level Initialization

For the low-level initialization, the MCU is initialized in MCU_init() by setting the MSP430F5529 main clock frequency to 25 MHz. The TRF7970A hardware connections and the MSP430F5529 SPI module (SPI clock running at 4 MHz – minimum recommended is 2 MHz) is initialized in TRF79x0_init(). The local variables are needed for transmit and receive and the peer-to-peer stack initialization. The Buttons_init function set the GPIO direction to inputs and the Buttons_interruptEnable() enable the interrupt for buttons S1 and S2.

#include "msp430.h"
#include "nfc_controller.h"
#include "ndef_image.h"
#include "lp_buttons.h"

uint16_t g_ui16ListenTime;
t_sNfcP2PMode g_sP2PSupportedModes;
t_sNfcP2PCommBitrate g_sP2PSupportedTargetBitrates;
t_sNfcP2PCommBitrate g_sP2PSupportedInitiatorBitrates;
t_sNfcDEP_P2PSetup g_sP2PSetupOptions;
uint8_t g_ui8NfcDepInitiatorDID;

void main(void)
{
     tNfcState eTempNFCState;
     tNfcState eCurrentNFCState;

     uint32_t ui32PacketRemaining;
     uint8_t ui8TXBytes;
     uint16_t ui16TxIndex;
     uint32_t ui32PacketLength;
     uint8_t * pui8NdefPointer;
     uint8_t ui8FragmentSize;

     // Peer to peer RX Status
     tNfcP2PRxStatus sP2PRxStatus;
     t_sNfcP2PMode sP2PMode;
     t_sNfcP2PCommBitrate sP2PBitrate;

     // Bytes Received from Peer to Peer
     uint16_t ui16BytesReceived = 0x00;

     // Initialize MCU
     MCU_init();

     //Enable interrupts globally
     __enable_interrupt();

     // Initialize TRF7970
     TRF79x0_init();

     // Initialize S1 and S2 buttons
     Buttons_init(BUTTON_ALL);
     Buttons_interruptEnable(BUTTON_ALL);

     // Initialize TRF7970A Idle Mode
     TRF79x0_idleMode();

     // Initialize the NFC Controller
     NFC_init();

     // This function will configure all the settings for each protocol
     NFC_configuration();

     // Initialize IDs for NFC-A, NFC-B and NFC-F
     NFC_initIDs();