dolphin4-api/EO3100I_API_Documentation/app_rssi.html

/************************************************************************-

EVA Board:

    EVA300-3


Input PIN:

    none


Output PIN:

    SCSEDIO0     PWM signal


Description:

    This example demonstrates a RSSI signal interface. From the radio telegrams that are received

    from the AIR the RSSI value will be transformed in a PWM signal depending of the value.


    In order to show really the lowest dBm value from all the subtelegrams, we wait until all the subtelegrams

    are received using the radio_waitEndMaturity(TRUE);


-************************************************************************/


#include "EO3100I_API.h"

#include "EO3100I_CFG.h"

//*********************PWM PARAM***************************


#define RADIO_TRHD_3                45


#define RADIO_TRHD_2                60


#define RADIO_TRHD_1                70


#define RADIO_TRHD_0                93


#define IO_PWM_PERIOD               320


#define IO_PWM_DUTY_4               (1.0 *  IO_PWM_PERIOD)


#define IO_PWM_DUTY_3               (0.7 * IO_PWM_PERIOD)


#define IO_PWM_DUTY_2               (0.5 * IO_PWM_PERIOD)


#define IO_PWM_DUTY_1               (0.3 * IO_PWM_PERIOD)


#define IO_PWM_DUTY_0               (0.1 * IO_PWM_PERIOD)


#define IO_PWM_DUTY_INIT            (IO_PWM_DUTY_0)


#define IO_PWM_HOLD                 500


//************************* GLOBAL VARIABLES **************************

code uint8 RSSI_VERSION[] = {0xE0,'V','E','R','S','I','O','N',1,0,2,0,'A','R','S','S','I',0x00,0xE0};       // RSSI SW Version


//************************* END GLOBAL VARIABLES **************************


void main()

{

    //

    TEL_RADIO_TYPE2  rTel2; // Structure to intepret Radiodata as ...see docu

    TEL_PARAM_TYPE2  pTel2; //param structure for received telegrams

    TIMER_TYPE   timer_Out_PWM;// SW timer structure for output of PWM signal


    // Configuration of the low level peripherals, interrupts, pins and buffers

    mainInit() ;


    // Enable the radio reception

    radio_enableRx(1);

    //Make sure that we wait for all subtelegrams in order to really get the lowest dBm value for the telegram

    radio_waitEndMaturity(TRUE);


    while(1)

    {

        // Watchdogtimerreset

        CLR_WDT();

        // If there is a telegram in the buffer

        if(radio_getTelegram2(&rTel2, &pTel2) == OK)

        {

            // dependent of the db value switch the duty cycle of the PWM output

            if(pTel2.p_rx.u8Dbm < RADIO_TRHD_3)

            {

                timer1_param[IDX_TIMER1_DUTYCYCLE] = IO_PWM_DUTY_4;

                timer1_init(&timer1_param, IDX_TIMER1_DUTYCYCLE);

            }

            else if(pTel2.p_rx.u8Dbm < RADIO_TRHD_2)

            {

                timer1_param[IDX_TIMER1_DUTYCYCLE] = IO_PWM_DUTY_3;

                timer1_init(&timer1_param, IDX_TIMER1_DUTYCYCLE);

            }

            else if(pTel2.p_rx.u8Dbm < RADIO_TRHD_1)

            {

                timer1_param[IDX_TIMER1_DUTYCYCLE] = IO_PWM_DUTY_2;

                timer1_init(&timer1_param, IDX_TIMER1_DUTYCYCLE);

            }

            else if(pTel2.p_rx.u8Dbm < RADIO_TRHD_0)

            {

                timer1_param[IDX_TIMER1_DUTYCYCLE] = IO_PWM_DUTY_1;

                timer1_init(&timer1_param, IDX_TIMER1_DUTYCYCLE);

            }

            else

            {

                timer1_param[IDX_TIMER1_DUTYCYCLE] = IO_PWM_DUTY_0;

                timer1_init(&timer1_param, IDX_TIMER1_DUTYCYCLE);

            }

            // Enables the timer for IO_PWM_HOLD to generate the PWM signal

            timer1_enable(1);

            // Start a sw timer for duration how long the PWM signal will be active

            time_setTimerCount(&timer_Out_PWM, IO_PWM_HOLD);

        }


        // check if the PWM signal has to switched off when timeout of the sw timer occurs

        if (time_getTimeOut(&timer_Out_PWM) == TIME_OUT)

            timer1_enable(0);


    }

}