xmpl_trx_base.c - Using Basic Transceiver Access Functions

This example illustrates the use of the basic radio transceiver access functions. It can be used to test a new board definition.

/* $Id: pgXmplTrxBase.html,v 1.1.1.4 2013/04/09 21:11:54 awachtler Exp $ */
/* Example for accessing the transceiver */

#include "board.h"
#include "transceiver.h"
#include "ioutil.h"
#include "xmpl.h"

static volatile trx_regval_t irq_cause;

int main(void)
{
static volatile trx_regval_t rval;

    /* This will stop the application before initializing the radio transceiver
     * (ISP issue with MISO pin, see FAQ)
     */
    trap_if_key_pressed();

    /* init peripherals */
    LED_INIT();
    trx_io_init(SPI_RATE_1_2);
    LED_SET_VALUE(LED_MAX_VALUE);
    LED_SET_VALUE(0);

    /* Step 1: reset transceiver */
    DELAY_US(TRX_INIT_TIME_US);
    TRX_RESET_LOW();
    TRX_SLPTR_LOW();
    DELAY_US(TRX_RESET_TIME_US);
    TRX_RESET_HIGH();
    LED_SET_VALUE(1);
    DELAY_MS(10);

    /* Step 2: check if correct transceiver is present
     * verify if the part and version ID's are correct.
     */
    rval = trx_reg_read(RG_PART_NUM);
    ERR_CHECK(RADIO_PART_NUM != rval);

    rval = trx_reg_read(RG_VERSION_NUM);
    ERR_CHECK_DIAG(RADIO_VERSION_NUM !=rval,2);


    /* Step 3: try a write command on an arbitrary RW register.
     */
    trx_reg_write(RG_IEEE_ADDR_0,42);
    rval = trx_reg_read(RG_IEEE_ADDR_0);
    ERR_CHECK_DIAG((42!=rval),3);


    /* Step 4: go to state TRX_OFF
     * bring the transceiver in state TRX_OFF and verify it.
     */
    trx_reg_write(RG_TRX_STATE, CMD_TRX_OFF);
    DELAY_US(TRX_INIT_TIME_US);
    DELAY_MS(1000);
    rval = trx_bit_read(SR_TRX_STATUS);
    ERR_CHECK_DIAG((TRX_OFF!=rval),4);

    /* Step 5: check SRAM access */

    /* Step 6: check IRQ
     * enable PLL-LOCK IRQ and transceiver IRQ at MCU
     * switch to PLL_ON state (which causes lock IRQ)
     * wait until the interrupt happened
     */
    trx_reg_write(RG_IRQ_MASK, TRX_IRQ_PLL_LOCK);
    irq_cause = 0;
    sei();

    trx_reg_write(RG_TRX_STATE,CMD_PLL_ON);
    
    DELAY_US(TRX_PLL_LOCK_TIME_US);
    DELAY_MS(200);
    ERR_CHECK_DIAG((0==irq_cause),6);
    /* done */
    LED_SET_VALUE(0);
    while(1)
    {
        WAIT500MS();
        LED_TOGGLE(0);
    }
}

#if defined(TRX_IF_RFA1)
ISR(TRX24_PLL_LOCK_vect)
{
    irq_cause |= TRX_IRQ_PLL_LOCK;
}
#else
ISR(TRX_IRQ_vect)
{
    /* reading IRQ_STATUS acknowledges the interrupt */
    irq_cause |= trx_reg_read(RG_IRQ_STATUS);
    LED_SET(1);
}
#endif

/* EOF */