Initialization

PHY_INIT

This command sequence is executed in order to bring the radio transceiver to the basic state TRX_OFF after power on. Nevertheless this sequence can safely be executed from any state.

After the reset, the hardware identification data are read. All interrupts will be disabled (RG_IRQ_MASK = 0) and a dummy read of the register RG_IRQ_STATUS is done, in order to avoid the occurence of unhandled interrupts, before the chip is started. In the case, that the radio transceiver is in state P_ON, when this sequence is executed, the state TRX_OFF is reached typically 510 us (refer to AT86RF230 data sheet) after CMD_TRX_OFF is written to the sub register SR_TRX_CMD.

Code example

    delay_us(510);
    trx_pinset_reset(0);
    trx_pinset_slptr(0);
    delay_us(6);
    trx_pinset_reset(1);
    pn = trx_reg_read(RG_PART_NUM);
    vn = trx_reg_read(RG_VERSION_NUM);
    mid0 = trx_reg_read(RG_MAN_ID_0);
    mid1 = trx_reg_read(RG_MAN_ID_1);
    trx_reg_write(RG_IRQ_MASK, 0);
    irqs = trx_reg_read(RG_IRQ_STATUS);
    trx_bit_write(SR_TRX_CMD, CMD_TRX_OFF);
    delay_us(510);
    state = trx_bit_read(SR_TRX_STATUS);
    ASSERT(state==TRX_OFF);

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