CCS/CC1310: The division operation of arithmetic causing effect on the transceiver

/***** Includes *****/
#include <stdlib.h>
#include <stdio.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>

/* Drivers */
#include <ti/drivers/rf/RF.h>
#include <ti/drivers/PIN.h>
#include <driverlib/rf_prop_mailbox.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,
    Board_LED1 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,
    PIN_TERMINATE
};


/***** Defines *****/
#define RX_TASK_STACK_SIZE 1024
#define RX_TASK_PRIORITY   2

/* TX 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 TX_TASK_STACK_SIZE 1024
#define TX_TASK_PRIORITY   3

/* TX Configuration */
#define PAYLOAD_LENGTH      10
#define PACKET_INTERVAL     (uint32_t)(4000000*0.5f) /* Set packet interval to 500ms */


/***** Prototypes *****/
static void txTaskFunction(UArg arg0, UArg arg1);
static void rxTaskFunction(UArg arg0, UArg arg1);
static void callback(RF_Handle h, RF_CmdHandle ch, RF_EventMask e);

/***** 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 txTaskParams;
Task_Struct txTask;    /* not static so you can see in ROV */
static uint8_t txTaskStack[TX_TASK_STACK_SIZE];

Semaphore_Struct semTxStruct;
Semaphore_Handle semTxHandle;

Semaphore_Struct semRxStruct;
Semaphore_Handle semRxHandle;


static RF_Object rfObject;
static RF_Handle rfHandle;


#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_ALIGN (rxDataEntryBuffer, 4);
#elif defined(__IAR_SYSTEMS_ICC__)
#pragma data_alignment = 4
#endif
static uint8_t rxDataEntryBuffer[RF_QUEUE_DATA_ENTRY_BUFFER_SIZE(NUM_DATA_ENTRIES,
                                                                 MAX_LENGTH,
                                                                 NUM_APPENDED_BYTES)];

/* Receive dataQueue for RF Core to fill in data */
static dataQueue_t dataQueue;
static rfc_dataEntryGeneral_t* currentDataEntry;
static uint8_t packetLength;
static uint8_t* packetDataPointer;
uint32_t time;
static uint8_t txPacket[PAYLOAD_LENGTH];
//static uint16_t seqNumber;

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 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 = 0;
    RF_cmdPropRx.pktConf.bRepeatNok = 0;

    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 */
        RF_runCmd(rfHandle, (RF_Op*)&RF_cmdPropRx, RF_PriorityNormal, &callback, IRQ_RX_ENTRY_DONE);
        Semaphore_pend(semRxHandle, BIOS_WAIT_FOREVER);
    }

}

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));
		
		printf("Data: %d %d %d %d %d %d %d %d %d %d\n", *packet, *(packet+1), *(packet+2),*(packet+3),*(packet+4),*(packet+5),*(packet+6),*(packet+7),*(packet+8),*(packet+9));
		
        Semaphore_post(semTxHandle);

        RFQueue_nextEntry();
    }
}

#if 1
/***** Function definitions *****/
void TxTask_init(PIN_Handle inPinHandle)
{
    pinHandle = inPinHandle;

    Task_Params_init(&txTaskParams);
    txTaskParams.stackSize = TX_TASK_STACK_SIZE;
    txTaskParams.priority = TX_TASK_PRIORITY;
    txTaskParams.stack = &txTaskStack;
    txTaskParams.arg0 = (UInt)1000000;

    Task_construct(&txTask, txTaskFunction, &txTaskParams, NULL);
}


static void txTaskFunction(UArg arg0, UArg arg1)
{
    uint32_t time;
    RF_Params rfParams;
    RF_Params_init(&rfParams);

    RF_cmdPropTx.pktLen = PAYLOAD_LENGTH;
    RF_cmdPropTx.pPkt = txPacket;
    RF_cmdPropTx.startTrigger.triggerType = TRIG_ABSTIME;
    RF_cmdPropTx.startTrigger.pastTrig = 1;
    RF_cmdPropTx.startTime = 0;

    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);
    }

    /* Get current time */
    time = RF_getCurrentTime();
	
	while(1)
    {
        Semaphore_pend(semTxHandle, BIOS_WAIT_FOREVER);
		printf("In Tx \n");
		
		uint32_t quotient;
		uint32_t rem;
		
		quotient = time/PACKET_INTERVAL;
		rem = quotient % 2 ;
	
        uint8_t i;
		if ( rem == 0 )
			for (i = 0; i < PAYLOAD_LENGTH; i++)
			{
				txPacket[i] = 2*i;
			}
		else
		{
			for (i = 0; i < PAYLOAD_LENGTH; i++)
			{
				txPacket[i] = 2*i+1;
			}
		}
        /* Set absolute TX time to utilize automatic power management */
        time += PACKET_INTERVAL;
        RF_cmdPropTx.startTime = time;

        /* Send packet */
        RF_EventMask result = RF_runCmd(rfHandle, (RF_Op*)&RF_cmdPropTx, RF_PriorityNormal, NULL, 0);
        if (!(result & RF_EventLastCmdDone))
        {
            /* Error */
            while(1);
        }

        PIN_setOutputValue(pinHandle, Board_LED1,!PIN_getOutputValue(Board_LED1));
        Semaphore_post(semRxHandle);
    }
}
#endif

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

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

    /* 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(&semTxStruct, 1, &semParams);
    Semaphore_construct(&semRxStruct, 1, &semParams);


    /* Obtain instance handle */
    semTxHandle = Semaphore_handle(&semTxStruct);
    semRxHandle = Semaphore_handle(&semRxStruct);

    /* Initialize task */
    RxTask_init(ledPinHandle);

    /* Initialize task */
    TxTask_init(ledPinHandle);

    /* Start BIOS */
    BIOS_start();

    return (0);
}