CCS/LAUNCHXL-CC1350: using RF and UART Example together

/*
 * 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>

/* Drivers */
#include <ti/drivers/rf/RF.h>
#include <ti/drivers/PIN.h>
#include <ti/drivers/UART.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_LED1 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,
    Board_LED2 | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,
    PIN_TERMINATE
};


/***** Defines *****/
#define TASK_STACK_SIZE      1024

/* 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) */

/***** Prototypes *****/
static void TaskFunction(UArg arg0, UArg arg1);

/***** Variable declarations *****/
static Task_Params TaskParams;
Task_Struct rxTask;    /* not static so you can see in ROV */
static uint8_t TaskStack[TASK_STACK_SIZE];

static RF_Object rfObject;
static RF_Handle rfHandle;

/* 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;
static uint8_t packetLength;
static uint8_t* packetDataPointer;

static uint8_t packet[MAX_LENGTH + NUM_APPENDED_BYTES - 1]; /* The length byte is stored in a separate variable */
uint16_t       PAYLOAD_LENGTH=0;
char           uartTxBuffer[MAX_LENGTH];

UART_Handle uart;

/***** Function definitions *****/
/*
 * This function is called whenever a buffer is full.
 * The content of the buffer is then converted into human-readable format and
 * sent to the PC via UART.
 *
 */
void uartTxPacket_Send(RF_Handle h, RF_CmdHandle ch, RF_EventMask e) {
    uint_fast16_t i;
    uint_fast16_t uartTxBufferOffset=0;

    if (e & RF_EventRxEntryDone)
    {
        /* Toggle pin to indicate RX */
        PIN_setOutputValue(ledPinHandle, 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));

        RFQueue_nextEntry();

        /*
         * Start with a header message and convert each entry in the current buffer
         * to a human-readable format
         */
        uartTxBufferOffset = System_sprintf(uartTxBuffer,
            "\r\nBuffer %u finished:\r\n", PAYLOAD_LENGTH++);

        for (i = 0; i < MAX_LENGTH; i++) {
            uartTxBufferOffset += System_sprintf(uartTxBuffer + uartTxBufferOffset,
                "%u,", packet[i]);
        }
        uartTxBuffer[uartTxBufferOffset] = '\n';
        /* Send out the data via UART */
        UART_write(uart, uartTxBuffer, uartTxBufferOffset + 1);

    }
    PAYLOAD_LENGTH=0;

}

/*
 * Callback function to use the UART in callback mode. It does nothing.
 */
void uartCallback(UART_Handle handle, void *buf, size_t count) {
   return;
}

void Task_init() {

    Task_Params_init(&TaskParams);
    TaskParams.stackSize = TASK_STACK_SIZE;
    TaskParams.stack = &TaskStack;
    //TaskParams.arg0 = (UInt)1000000;

    Task_construct(&rxTask, TaskFunction, &TaskParams, NULL);
}

static void TaskFunction(UArg arg0, UArg arg1)
{
    UART_Params uartParams;
    const char echoPrompt[] = "\fRF Rx :\r\n";

    RF_Params rfParams;
    RF_Params_init(&rfParams);

    /* Create a UART with data processing off. */
    UART_Params_init(&uartParams);
    uartParams.writeDataMode = UART_DATA_BINARY;
    uartParams.writeMode = UART_MODE_CALLBACK;
    uartParams.writeCallback = uartCallback;
    uartParams.baudRate = 115200;
    uart = UART_open(Board_UART0, &uartParams);

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

    UART_write(uart, echoPrompt, sizeof(echoPrompt));

    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;

    /* 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);

    /* Enter RX mode and stay forever in RX */
    RF_runCmd(rfHandle, (RF_Op*)&RF_cmdPropRx, RF_PriorityNormal, &uartTxPacket_Send, IRQ_RX_ENTRY_DONE);

    while(1);
}


/*
 *  ======== main ========
 */
int main(void)
{
    /* 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");
    }

    /* Initialize task */
    Task_init();

    /* Start BIOS */
    BIOS_start();

    return (0);
}