RTOS/LAUNCHXL-CC1350: Encryption and rfpackettx not working

/*
 * Copyright (c) 2015-2016, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/***** Includes *****/
#include <stdlib.h>
#include <xdc/std.h>
#include <xdc/cfg/global.h>
#include <xdc/runtime/System.h>

#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Semaphore.h>

/* Drivers */
#include <ti/drivers/rf/RF.h>
#include <ti/drivers/crypto/CryptoCC26XX.h>
#include <ti/drivers/PIN.h>
#include <driverlib/rf_prop_mailbox.h>
#include <ti/drivers/UART.h>

/* Board Header files */
#include "Board.h"

#include "RFQueue.h"
#include "smartrf_settings/smartrf_settings.h"

#include <stdlib.h>

/* Pin driver handle */
static PIN_Handle ledPinHandle;
static PIN_State ledPinState;

/*
 * Application LED pin configuration table:
 *   - All LEDs board LEDs are off.
 */
PIN_Config pinTable[] =
{
    Board_LED2 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,
    PIN_TERMINATE
};


/* Packet RX Configuration */
#define DATA_ENTRY_HEADER_SIZE 8  /* Constant header size of a Generic Data Entry */
#define MAX_LENGTH             30 /* Max length byte the radio will accept */
#define NUM_DATA_ENTRIES       2  /* NOTE: Only two data entries supported at the moment */
#define NUM_APPENDED_BYTES     2  /* The Data Entries data field will contain:
                                   * 1 Header byte (RF_cmdPropRx.rxConf.bIncludeHdr = 0x1)
                                   * Max 30 payload bytes
                                   * 1 status byte (RF_cmdPropRx.rxConf.bAppendStatus = 0x1) */


/***** Defines *****/
#define UARTCC26XX_CMD_RX_FIFO_FLUSH            UART_CMD_RESERVED + 2


#define RX_TASK_STACK_SIZE 1024
#define RX_TASK_PRIORITY   1

#define AES_TASK_STACK_SIZE 1024
#define AES_TASK_PRIORITY  2

#define UART_RX_TASK_STACK_SIZE 1024
#define UART_RX_TASK_PRIORITY   3


/* ASCII values of some useful keys */
#define CHAR_LINEFEED                         0x0A
#define CHAR_LINE_END_1                       0x0D   // Enter
#define CHAR_LINE_END_2                       0x03   // Enter on numpad
#define CHAR_SPACE                            0x20
#define CHAR_ZERO                             0x30
#define CHAR_UPPERCASE_START                  0x40

/* Encryption Defines */

#define macLength           (4)
#define clearTextLength     (16)
#define cipherTextLength    (macLength + clearTextLength)
#define nonceLength         (12)
#define aadLength           (14)


// Holds the AES-CCM setup for this example
typedef struct
{
    uint8_t key[16];                                // A 128 Bit AES key
    CryptoCC26XX_KeyLocation keyLocation;           // One of 8 key locations in the hardware
    uint8_t clearAndCipherText[cipherTextLength];   // Holds the cleartext before, and the ciphertext
                                                    // after the encryption operation.
                                                    // Ciphertext = encrypted text + message authentication code (MAC).
    uint8_t nonce[nonceLength];  // A value that is used only once (cryptographic term 'nonce')
    uint8_t header[aadLength];   // A header that is not encrypted but is authenticated in the operation (AAD).
} AesCcmExample;

AesCcmExample ccmSetup =
{
    .key = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
             0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C },
    .keyLocation = CRYPTOCC26XX_KEY_0,
    .clearAndCipherText = { 't','h','i','s','i','s','a','p','l','a','i','n','t','e','x','t','0','0','0','0' },
    .nonce  = { 't','h','i','s','i','s','a','n','o','n','c','e' },
    .header = { 't','h','i','s','i','s','a','h','e','a','d','e','r','1' }
};


/***** Prototypes *****/
static void rxTaskFunction(UArg arg0, UArg arg1);
static void callback(RF_Handle h, RF_CmdHandle ch, RF_EventMask e);
static void uartRxTaskFunction(UArg arg0, UArg arg1);
void uart_writePayLoad(uint8_t *packet, uint8_t length);
static void aesTaskFunction(UArg arg0, UArg arg1);
/***** Variable declarations *****/
static Task_Params rxTaskParams;
Task_Struct rxTask;    /* not static so you can see in ROV */
static uint8_t rxTaskStack[RX_TASK_STACK_SIZE];

static Task_Params aesTaskParams;
Task_Struct aesTask;
static uint8_t aesTaskStack[AES_TASK_STACK_SIZE];

static Task_Params uartRxTaskParams;
Task_Struct uartRxTask;    /* not static so you can see in ROV */
static uint8_t uartRxTaskStack[UART_RX_TASK_STACK_SIZE];

Semaphore_Struct semRxStruct;
Semaphore_Handle semRxHandle;

Semaphore_Struct semUartRxStruct;
Semaphore_Handle semUartRxHandle;

Semaphore_Struct semAesStruct;
Semaphore_Handle semAesHandle;

static RF_Object rfObject;
static RF_Handle rfHandle;
static RF_CmdHandle rfRxCmd;

UART_Handle uart = NULL;
UART_Params uartParams;


/* Buffer which contains all Data Entries for receiving data.
 * Pragmas are needed to make sure this buffer is 4 byte aligned (requirement from the RF Core) */
#if defined(__TI_COMPILER_VERSION__)
    #pragma DATA_ALIGN (rxDataEntryBuffer, 4);
        static uint8_t rxDataEntryBuffer[RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
                                                                 MAX_LENGTH,
                                                                 NUM_APPENDED_BYTES)];
#elif defined(__IAR_SYSTEMS_ICC__)
    #pragma data_alignment = 4
        static uint8_t rxDataEntryBuffer[RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
                                                                 MAX_LENGTH,
                                                                 NUM_APPENDED_BYTES)];
#elif defined(__GNUC__)
        static uint8_t rxDataEntryBuffer [RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
            MAX_LENGTH, NUM_APPENDED_BYTES)] __attribute__ ((aligned (4)));
#else
    #error This compiler is not supported.
#endif

/* Receive dataQueue for RF Core to fill in data */
static dataQueue_t dataQueue;
static rfc_dataEntryGeneral_t* currentDataEntry;
uint8_t packetReady = 0;
static uint8_t packetLength;
static uint8_t* packetDataPointer;

static PIN_Handle pinHandle;

static uint8_t packet[MAX_LENGTH + NUM_APPENDED_BYTES - 1]; /* The length byte is stored in a separate variable */


/***** Function definitions *****/
void UartRxTask_init(PIN_Handle ledPinHandle) {
    pinHandle = ledPinHandle;

    Task_Params_init(&uartRxTaskParams);
    uartRxTaskParams.stackSize = UART_RX_TASK_STACK_SIZE;
    uartRxTaskParams.priority = UART_RX_TASK_PRIORITY;
    uartRxTaskParams.stack = &uartRxTaskStack;
    uartRxTaskParams.arg0 = (UInt)1000000;

    Task_construct(&uartRxTask, uartRxTaskFunction, &uartRxTaskParams, NULL);
}

void AesRxTask_init(PIN_Handle ledPinHandle) {
	pinHandle = ledPinHandle;

	Task_Params_init(&aesTaskParams);
    aesTaskParams.stackSize = AES_TASK_STACK_SIZE;
    aesTaskParams.priority = AES_TASK_PRIORITY;
    aesTaskParams.stack = &aesTaskStack;
    aesTaskParams.arg0 = (UInt)1000000;

    Task_construct(&aesTask, aesTaskFunction, &aesTaskParams, NULL);
}

void RxTask_init(PIN_Handle ledPinHandle) {
    pinHandle = ledPinHandle;

    Task_Params_init(&rxTaskParams);
    rxTaskParams.stackSize = RX_TASK_STACK_SIZE;
    rxTaskParams.priority = RX_TASK_PRIORITY;
    rxTaskParams.stack = &rxTaskStack;
    rxTaskParams.arg0 = (UInt)1000000;

    Task_construct(&rxTask, rxTaskFunction, &rxTaskParams, NULL);
}

/* Function Definations */

static void rxTaskFunction(UArg arg0, UArg arg1)
{
    RF_Params rfParams;
    RF_Params_init(&rfParams);

    if( RFQueue_defineQueue(&dataQueue,
                            rxDataEntryBuffer,
                            sizeof(rxDataEntryBuffer),
                            NUM_DATA_ENTRIES,
                            MAX_LENGTH + NUM_APPENDED_BYTES))
    {
        /* Failed to allocate space for all data entries */
        while(1);
    }

    /* Modify CMD_PROP_RX command for application needs */
    RF_cmdPropRx.pQueue = &dataQueue;           /* Set the Data Entity queue for received data */
    RF_cmdPropRx.rxConf.bAutoFlushIgnored = 1;  /* Discard ignored packets from Rx queue */
    RF_cmdPropRx.rxConf.bAutoFlushCrcErr = 1;   /* Discard packets with CRC error from Rx queue */
    RF_cmdPropRx.maxPktLen = MAX_LENGTH;        /* Implement packet length filtering to avoid PROP_ERROR_RXBUF */
    RF_cmdPropRx.pktConf.bRepeatOk = 1;
    RF_cmdPropRx.pktConf.bRepeatNok = 1;

    if (!rfHandle) {
        /* Request access to the radio */
        rfHandle = RF_open(&rfObject, &RF_prop, (RF_RadioSetup*)&RF_cmdPropRadioDivSetup, &rfParams);

        /* Set the frequency */
        RF_postCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);
    }

    while (1) {
    /* Enter RX mode and stay forever in RX */
        rfRxCmd = RF_postCmd(rfHandle, (RF_Op*)&RF_cmdPropRx, RF_PriorityNormal, &callback, IRQ_RX_ENTRY_DONE);

    }

}

void callback(RF_Handle h, RF_CmdHandle ch, RF_EventMask e)
{
    if (e & RF_EventRxEntryDone)
    {
        /* Toggle pin to indicate RX */
        PIN_setOutputValue(pinHandle, Board_LED2,!PIN_getOutputValue(Board_LED2));

        /* Get current unhandled data entry */
        currentDataEntry = RFQueue_getDataEntry();

        /* Handle the packet data, located at &currentDataEntry->data:
         * - Length is the first byte with the current configuration
         * - Data starts from the second byte */
        packetLength      = *(uint8_t*)(&currentDataEntry->data);
        packetDataPointer = (uint8_t*)(&currentDataEntry->data + 1);

        /* Copy the payload + the status byte to the packet variable */
        memcpy(packet, packetDataPointer, (packetLength + 1));
        memcpy(ccmSetup.clearAndCipherText, packetDataPointer, (packetLength + 1));


        packetReady = 1;

        RFQueue_nextEntry();

        Semaphore_post(semAesHandle);
    }
}

static void aesTaskFunction(UArg arg0, UArg arg1)
{
//	int i = 0;
	//for(i=0; i<20; i++){

		//ccmSetup.clearAndCipherText[i] = packet[i];

	//}

	CryptoCC26XX_Handle             handle;
	int32_t                         keyIndex;
	CryptoCC26XX_AESCCM_Transaction trans;
	int32_t                         status;

	// Initialize Crypto driver structures
	CryptoCC26XX_init();

	// Open the crypto hardware with non-exclusive access and default parameters.
	handle = CryptoCC26XX_open(Board_CRYPTO, false, NULL);
	if (handle == NULL) {
	    System_abort("CryptoCC26XX did not open");
	}

	// Allocate a key storage location in the hardware
	keyIndex = CryptoCC26XX_allocateKey(handle, ccmSetup.keyLocation, (const uint32_t *) ccmSetup.key);
	if (keyIndex == CRYPTOCC26XX_STATUS_ERROR) {
	    System_abort("Key Location was not allocated.");
	}

    while(1)
    {

    Semaphore_pend(semAesHandle, BIOS_WAIT_FOREVER);

	// Decrypt and authenticate message
	CryptoCC26XX_Transac_init((CryptoCC26XX_Transaction *) &trans, CRYPTOCC26XX_OP_AES_CCMINV);
	trans.keyIndex   = keyIndex;
	trans.authLength = macLength;
	trans.nonce  = (char *) ccmSetup.nonce;
	trans.header = (char *) ccmSetup.header;
	trans.fieldLength  = 3;
	trans.msgInLength  = cipherTextLength;
	trans.headerLength = aadLength;
	trans.msgIn  = (char *) &(ccmSetup.clearAndCipherText[0]);                // Message is decrypted in place
	trans.msgOut = (char *) &(ccmSetup.clearAndCipherText[clearTextLength]);  // Points to the MAC, is used as input here
//	trans.msgIn  = (char *) &(packet[0]);                // Message is decrypted in place
//	trans.msgOut = (char *) &(packet[20]);  // Points to the MAC, is used as input here

	// Do AES-CCM decryption and authentication
	status = CryptoCC26XX_transact(handle, (CryptoCC26XX_Transaction *) &trans);
	if(status != CRYPTOCC26XX_STATUS_SUCCESS){
	    System_abort("Decryption and authentication failed.");
	}

	packetDataPointer = ccmSetup.clearAndCipherText;
	Semaphore_post(semUartRxHandle);


	// Release the key location
	status = CryptoCC26XX_releaseKey(handle, &keyIndex);
	if (status != CRYPTOCC26XX_STATUS_SUCCESS) {
	    System_abort("Key release was not successful.");
	}
	}
}


static void uartRxTaskFunction(UArg arg0, UArg arg1)
{
    if (uart == NULL) {
        /* Create a UART with data processing off. */
        UART_Params_init(&uartParams);
        uartParams.writeDataMode = UART_DATA_BINARY;
        uartParams.readDataMode = UART_DATA_BINARY;
        uartParams.readReturnMode = UART_RETURN_FULL;
        uartParams.readEcho = UART_ECHO_OFF;
        uartParams.baudRate = 115200;
        uart = UART_open(Board_UART0, &uartParams);

        if (uart == NULL) {
            System_abort("Error opening the UART");
        }
    }

    while (1) {
        Semaphore_pend(semUartRxHandle, BIOS_WAIT_FOREVER);
        if (packetReady) {
            UART_write(uart, ccmSetup.clearAndCipherText, 20);
            uart_writePayLoad(packetDataPointer, packetLength);
           // uart_writePayLoad(ccmSetup.clearAndCipherText, packetLength);

            packetReady = 0;
        }
    }
}


//*****************************************************************************
//
//! Print payload to UART
//
//*****************************************************************************

void uart_writePayLoad(uint8_t *packet, uint8_t length) {
   // char output[2];

    UART_control(uart, UARTCC26XX_CMD_RX_FIFO_FLUSH, 0);
    UART_write(uart, "rx data: ", 9);
    UART_write(uart, packet, length);
    UART_control(uart, UARTCC26XX_CMD_RX_FIFO_FLUSH, 0);

    /* Output a carriage return */
   // output[0] = CHAR_LINE_END_1;
   // UART_write(uart, output, 1);

}


/*
 *  ======== main ========
 */
int main(void)
{
    Semaphore_Params semParams;

    /* Call board init functions. */
    Board_initGeneral();
    Board_initUART();

    /* Open LED pins */
    ledPinHandle = PIN_open(&ledPinState, pinTable);
    if(!ledPinHandle)
    {
        System_abort("Error initializing board LED pins\n");
    }

    /* Construct a Semaphore object to be used as a resource lock, inital count 0 */
    Semaphore_Params_init(&semParams);
    Semaphore_construct(&semRxStruct, 0, &semParams);
    Semaphore_construct(&semUartRxStruct, 0, &semParams);
    Semaphore_construct(&semAesStruct, 0, &semParams);


    /* Obtain instance handle */
    semRxHandle = Semaphore_handle(&semRxStruct);
    semUartRxHandle = Semaphore_handle(&semUartRxStruct);
    semAesHandle = Semaphore_handle(&semAesStruct);
    /* Initialize task */
    RxTask_init(ledPinHandle);

    UartRxTask_init(ledPinHandle);

    AesRxTask_init(ledPinHandle);
    /* Start BIOS */
    BIOS_start();

    return (0);
}

/*
 * Copyright (c) 2015-2016, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/***** Includes *****/
#include <stdlib.h>
#include <xdc/std.h>
#include <xdc/cfg/global.h>
#include <xdc/runtime/System.h>

#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Semaphore.h>

/* Drivers */
#include <ti/drivers/rf/RF.h>
#include <ti/drivers/PIN.h>
#include <ti/drivers/crypto/CryptoCC26XX.h>
#include <driverlib/rf_prop_mailbox.h>
#include <ti/drivers/UART.h>

/* Board Header files */
#include "Board.h"

#include "RFQueue.h"
#include "smartrf_settings/smartrf_settings.h"

#include <stdlib.h>

/* Pin driver handle */
static PIN_Handle ledPinHandle;
static PIN_State ledPinState;

/*
 * Application LED pin configuration table:
 *   - All LEDs board LEDs are off.
 */
PIN_Config pinTable[] =
{
    Board_LED2 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,
    PIN_TERMINATE
};


/* Packet RX Configuration */
#define DATA_ENTRY_HEADER_SIZE 8  /* Constant header size of a Generic Data Entry */
#define MAX_LENGTH             30 /* Max length byte the radio will accept */
#define NUM_DATA_ENTRIES       2  /* NOTE: Only two data entries supported at the moment */
#define NUM_APPENDED_BYTES     2  /* The Data Entries data field will contain:
                                   * 1 Header byte (RF_cmdPropRx.rxConf.bIncludeHdr = 0x1)
                                   * Max 30 payload bytes
                                   * 1 status byte (RF_cmdPropRx.rxConf.bAppendStatus = 0x1) */


/***** Defines *****/
#define UARTCC26XX_CMD_RX_FIFO_FLUSH            UART_CMD_RESERVED + 2


#define RX_TASK_STACK_SIZE 1024
#define RX_TASK_PRIORITY   1

#define AES_TASK_STACK_SIZE 1024
#define AES_TASK_PRIORITY   2

#define UART_RX_TASK_STACK_SIZE 1024
#define UART_RX_TASK_PRIORITY   3


/* ASCII values of some useful keys */
#define CHAR_LINEFEED                         0x0A
#define CHAR_LINE_END_1                       0x0D   // Enter
#define CHAR_LINE_END_2                       0x03   // Enter on numpad
#define CHAR_SPACE                            0x20
#define CHAR_ZERO                             0x30
#define CHAR_UPPERCASE_START                  0x40

/* Encryption Defines */

#define macLength           (4)
#define clearTextLength     (16)
#define cipherTextLength    (macLength + clearTextLength)
#define nonceLength         (12)
#define aadLength           (14)


// Holds the AES-CCM setup for this example
typedef struct
{
    uint8_t key[16];                                // A 128 Bit AES key
    CryptoCC26XX_KeyLocation keyLocation;           // One of 8 key locations in the hardware
    uint8_t clearAndCipherText[cipherTextLength];   // Holds the cleartext before, and the ciphertext
                                                    // after the encryption operation.
                                                    // Ciphertext = encrypted text + message authentication code (MAC).
    uint8_t nonce[nonceLength];  // A value that is used only once (cryptographic term 'nonce')
    uint8_t header[aadLength];   // A header that is not encrypted but is authenticated in the operation (AAD).
} AesCcmExample;

AesCcmExample ccmSetup =
{
    .key = { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
             0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C },
    .keyLocation = CRYPTOCC26XX_KEY_0,
    .clearAndCipherText = { 't','h','i','s','i','s','a','p','l','a','i','n','t','e','x','t','0','0','0','0' },
   // .clearAndCipherText = txPacket[0],
    .nonce  = { 't','h','i','s','i','s','a','n','o','n','c','e' },
    .header = { 't','h','i','s','i','s','a','h','e','a','d','e','r','1' }
};


/***** Prototypes *****/
static void rxTaskFunction(UArg arg0, UArg arg1);
static void callback(RF_Handle h, RF_CmdHandle ch, RF_EventMask e);
static void aesTaskFunction(UArg arg0, UArg arg1);
static void uartRxTaskFunction(UArg arg0, UArg arg1);
void uart_writePayLoad(uint8_t *packet, uint8_t length);

/***** Variable declarations *****/
static Task_Params rxTaskParams;
Task_Struct rxTask;    /* not static so you can see in ROV */
static uint8_t rxTaskStack[RX_TASK_STACK_SIZE];

static Task_Params uartRxTaskParams;
Task_Struct uartRxTask;    /* not static so you can see in ROV */
static uint8_t uartRxTaskStack[UART_RX_TASK_STACK_SIZE];

static Task_Params aesTaskParams;
Task_Struct aesTask;
static uint8_t aesTxTaskStack[AES_TASK_STACK_SIZE];


Semaphore_Struct semRxStruct;
Semaphore_Handle semRxHandle;

Semaphore_Struct semAesStruct;
Semaphore_Handle semAesHandle;


Semaphore_Struct semUartRxStruct;
Semaphore_Handle semUartRxHandle;

static RF_Object rfObject;
static RF_Handle rfHandle;
static RF_CmdHandle rfRxCmd;

UART_Handle uart = NULL;
UART_Params uartParams;


/* Buffer which contains all Data Entries for receiving data.
 * Pragmas are needed to make sure this buffer is 4 byte aligned (requirement from the RF Core) */
#if defined(__TI_COMPILER_VERSION__)
    #pragma DATA_ALIGN (rxDataEntryBuffer, 4);
        static uint8_t rxDataEntryBuffer[RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
                                                                 MAX_LENGTH,
                                                                 NUM_APPENDED_BYTES)];
#elif defined(__IAR_SYSTEMS_ICC__)
    #pragma data_alignment = 4
        static uint8_t rxDataEntryBuffer[RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
                                                                 MAX_LENGTH,
                                                                 NUM_APPENDED_BYTES)];
#elif defined(__GNUC__)
        static uint8_t rxDataEntryBuffer [RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
            MAX_LENGTH, NUM_APPENDED_BYTES)] __attribute__ ((aligned (4)));
#else
    #error This compiler is not supported.
#endif

/* Receive dataQueue for RF Core to fill in data */
static dataQueue_t dataQueue;
static rfc_dataEntryGeneral_t* currentDataEntry;
uint8_t packetReady = 0;
static uint8_t packetLength;
static uint8_t* packetDataPointer;

static PIN_Handle pinHandle;

static uint8_t packet[MAX_LENGTH + NUM_APPENDED_BYTES - 1]; /* The length byte is stored in a separate variable */


/***** Function definitions *****/
void UartRxTask_init(PIN_Handle ledPinHandle) {
    pinHandle = ledPinHandle;

    Task_Params_init(&uartRxTaskParams);
    uartRxTaskParams.stackSize = UART_RX_TASK_STACK_SIZE;
    uartRxTaskParams.priority = UART_RX_TASK_PRIORITY;
    uartRxTaskParams.stack = &uartRxTaskStack;
    uartRxTaskParams.arg0 = (UInt)1000000;

    Task_construct(&uartRxTask, uartRxTaskFunction, &uartRxTaskParams, NULL);
}

void AesTask_init(PIN_Handle inPinHandle)
{
    pinHandle = inPinHandle;

    Task_Params_init(&aesTaskParams);
    aesTaskParams.stackSize = AES_TASK_STACK_SIZE;
    aesTaskParams.priority = AES_TASK_PRIORITY;
    aesTaskParams.stack = &aesTxTaskStack;
    aesTaskParams.arg0 = (UInt)1000000;

    Task_construct(&aesTask, aesTaskFunction, &aesTaskParams, NULL);
}


void RxTask_init(PIN_Handle ledPinHandle) {
    pinHandle = ledPinHandle;

    Task_Params_init(&rxTaskParams);
    rxTaskParams.stackSize = RX_TASK_STACK_SIZE;
    rxTaskParams.priority = RX_TASK_PRIORITY;
    rxTaskParams.stack = &rxTaskStack;
    rxTaskParams.arg0 = (UInt)1000000;

    Task_construct(&rxTask, rxTaskFunction, &rxTaskParams, NULL);
}

static void rxTaskFunction(UArg arg0, UArg arg1)
{
    RF_Params rfParams;
    RF_Params_init(&rfParams);

    if( RFQueue_defineQueue(&dataQueue,
                            rxDataEntryBuffer,
                            sizeof(rxDataEntryBuffer),
                            NUM_DATA_ENTRIES,
                            MAX_LENGTH + NUM_APPENDED_BYTES))
    {
        /* Failed to allocate space for all data entries */
        while(1);
    }

    /* Modify CMD_PROP_RX command for application needs */
    RF_cmdPropRx.pQueue = &dataQueue;           /* Set the Data Entity queue for received data */
    RF_cmdPropRx.rxConf.bAutoFlushIgnored = 1;  /* Discard ignored packets from Rx queue */
    RF_cmdPropRx.rxConf.bAutoFlushCrcErr = 1;   /* Discard packets with CRC error from Rx queue */
    RF_cmdPropRx.maxPktLen = MAX_LENGTH;        /* Implement packet length filtering to avoid PROP_ERROR_RXBUF */
    RF_cmdPropRx.pktConf.bRepeatOk = 1;
    RF_cmdPropRx.pktConf.bRepeatNok = 1;

    if (!rfHandle) {
        /* Request access to the radio */
        rfHandle = RF_open(&rfObject, &RF_prop, (RF_RadioSetup*)&RF_cmdPropRadioDivSetup, &rfParams);

        /* Set the frequency */
        RF_postCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);
    }

    while (1) {
    /* Enter RX mode and stay forever in RX */
        rfRxCmd = RF_postCmd(rfHandle, (RF_Op*)&RF_cmdPropRx, RF_PriorityNormal, &callback, IRQ_RX_ENTRY_DONE);

    }

}

void callback(RF_Handle h, RF_CmdHandle ch, RF_EventMask e)
{
    if (e & RF_EventRxEntryDone)
    {
        /* Toggle pin to indicate RX */
        PIN_setOutputValue(pinHandle, Board_LED2,!PIN_getOutputValue(Board_LED2));

        /* Get current unhandled data entry */
        currentDataEntry = RFQueue_getDataEntry();

        /* Handle the packet data, located at &currentDataEntry->data:
         * - Length is the first byte with the current configuration
         * - Data starts from the second byte */
        packetLength      = *(uint8_t*)(&currentDataEntry->data);
        packetDataPointer = (uint8_t*)(&currentDataEntry->data + 1);

        /* Copy the payload + the status byte to the packet variable */
        memcpy(packet, packetDataPointer, (packetLength + 1));

        	int i = 0;
        	for(i=0; i<20; i++){

        		ccmSetup.clearAndCipherText[i] = packet[i];

        	}


        packetReady = 1;

        RFQueue_nextEntry();

        Semaphore_post(semAesHandle);
    }
}

static void aesTaskFunction(UArg arg0, UArg arg1)
{
/*	int i = 0;
	for(i=0; i<20; i++){

		ccmSetup.clearAndCipherText[i] = txPacket[i];

	}*/

	CryptoCC26XX_Handle             handle;
	int32_t                         keyIndex;
	CryptoCC26XX_AESCCM_Transaction trans;
	int32_t                         status;

	// Initialize Crypto driver structures
	CryptoCC26XX_init();

	// Open the crypto hardware with non-exclusive access and default parameters.
	handle = CryptoCC26XX_open(Board_CRYPTO, false, NULL);
	if (handle == NULL) {
	    System_abort("CryptoCC26XX did not open");
	}

	// Allocate a key storage location in the hardware
	keyIndex = CryptoCC26XX_allocateKey(handle, ccmSetup.keyLocation, (const uint32_t *) ccmSetup.key);
	if (keyIndex == CRYPTOCC26XX_STATUS_ERROR) {
	    System_abort("Key Location was not allocated.");
	}

	while(1){

    Semaphore_pend(semAesHandle, BIOS_WAIT_FOREVER);


    // Decrypt and authenticate message
    CryptoCC26XX_Transac_init((CryptoCC26XX_Transaction *) &trans, CRYPTOCC26XX_OP_AES_CCMINV);
    trans.keyIndex   = keyIndex;
    trans.authLength = macLength;
    trans.nonce  = (char *) ccmSetup.nonce;
    trans.header = (char *) ccmSetup.header;
    trans.fieldLength  = 3;
    trans.msgInLength  = cipherTextLength;
    trans.headerLength = aadLength;
    trans.msgIn  = (char *) &(ccmSetup.clearAndCipherText[0]);                // Message is decrypted in place
    trans.msgOut = (char *) &(ccmSetup.clearAndCipherText[clearTextLength]);  // Points to the MAC, is used as input here


    // Do AES-CCM decryption and authentication
    status = CryptoCC26XX_transact(handle, (CryptoCC26XX_Transaction *) &trans);
    if(status != CRYPTOCC26XX_STATUS_SUCCESS){
        System_abort("Decryption and authentication failed.");
    }


	Semaphore_post(semUartRxHandle);


	// Release the key location
	status = CryptoCC26XX_releaseKey(handle, &keyIndex);
	if (status != CRYPTOCC26XX_STATUS_SUCCESS) {
	    System_abort("Key release was not successful.");
	}
	}
	//	Semaphore_post(semUartRxHandle);

}


static void uartRxTaskFunction(UArg arg0, UArg arg1)
{
    if (uart == NULL) {
        /* Create a UART with data processing off. */
        UART_Params_init(&uartParams);
        uartParams.writeDataMode = UART_DATA_BINARY;
        uartParams.readDataMode = UART_DATA_BINARY;
        uartParams.readReturnMode = UART_RETURN_FULL;
        uartParams.readEcho = UART_ECHO_OFF;
        uartParams.baudRate = 115200;
        uart = UART_open(Board_UART0, &uartParams);

        if (uart == NULL) {
            System_abort("Error opening the UART");
        }
    }

    while (1) {
        Semaphore_pend(semUartRxHandle, BIOS_WAIT_FOREVER);
        if (packetReady) {
            UART_write(uart, ccmSetup.clearAndCipherText, sizeof(ccmSetup.clearAndCipherText));

            uart_writePayLoad(packetDataPointer, packetLength);
            packetReady = 0;
        }
    }
}


//*****************************************************************************
//
//! Print payload to UART
//
//*****************************************************************************

void uart_writePayLoad(uint8_t *packet, uint8_t length) {
 //   char output[2];

    UART_control(uart, UARTCC26XX_CMD_RX_FIFO_FLUSH, 0);
    UART_write(uart, "rx data: ", 9);
    UART_write(uart, packet, length);
    UART_control(uart, UARTCC26XX_CMD_RX_FIFO_FLUSH, 0);

    /* Output a carriage return */
   // output[0] = CHAR_LINE_END_1;
   // UART_write(uart, output, 1);

}


/*
 *  ======== main ========
 */
int main(void)
{
    Semaphore_Params semParams;

    /* Call board init functions. */
    Board_initGeneral();
    Board_initUART();

    /* Open LED pins */
    ledPinHandle = PIN_open(&ledPinState, pinTable);
    if(!ledPinHandle)
    {
        System_abort("Error initializing board LED pins\n");
    }

    /* Construct a Semaphore object to be used as a resource lock, inital count 0 */
    Semaphore_Params_init(&semParams);
    Semaphore_construct(&semRxStruct, 0, &semParams);
    Semaphore_construct(&semUartRxStruct, 0, &semParams);
    Semaphore_construct(&semAesStruct, 0, &semParams);


    /* Obtain instance handle */
    semRxHandle = Semaphore_handle(&semRxStruct);
    semUartRxHandle = Semaphore_handle(&semUartRxStruct);
    semAesHandle = Semaphore_handle(&semAesStruct);


    /* Initialize task */
    RxTask_init(ledPinHandle);

    /* Initialize task */
    UartRxTask_init(ledPinHandle);

    AesTask_init(ledPinHandle);


    /* Start BIOS */
    BIOS_start();

    return (0);
}