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81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/*
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* Copyright (C) 2018 Otto-von-Guericke-Universität Magdeburg
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#pragma once
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/**
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* @ingroup drivers_cc110x
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* @{
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*
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* @file
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* @brief Internal functions of the CC110x transceiver driver
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*
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* @author Marian Buschsieweke <marian.buschsieweke@ovgu.de>
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*/
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#include "cc110x_calibration.h"
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#include "cc110x_communication.h"
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#include "cc110x_constants.h"
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#include "cc110x_netdev.h"
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#include "cc110x_rx_tx.h"
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#include "cc110x_settings.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Extract the device state from the status register value
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*
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* @param status Contents of the CC110x's status register
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* @return The state encoded in @p status
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*
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* The status register contains the device state at the bits 1 - 3
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Format of the status byte
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* 0 1 2 3 4 5 6 7
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* +-+-+-+-+-+-+-+-+
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* |R|STATE| FIFO |
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* +-+-+-+-+-+-+-+-+
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*
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* R = Chip Ready bit (0 = ready, 1 = power and crystal are not yet stable)
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* STATE = The device state
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* FIFO = Number of bytes available in RX FIFO or (in TX mode) number of free
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* bytes
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* Note: The FIFO has a size of 64 bytes. If more than 15 bytes are available
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* for reading in the FIFO (or more than 15 bytes can be written in TX), the
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* value will still show 15. This driver never uses this information, but
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* accesses a dedicated register for that.
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*/
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static inline cc110x_state_t cc110x_state_from_status(uint8_t status)
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{
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return (cc110x_state_t)((status >> 4) & 0x7);
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}
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/**
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* @brief Figure out of the transceiver is ready or still powering up
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* @param status Contents of the CC110x's status register
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* @retval 1 Transceiver is ready
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* @retval 0 *NOT* ready, still powering up
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*
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* @see cc110x_state_from_status
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*/
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static inline int cc110x_is_ready_from_status(uint8_t status)
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{
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return (status & 0x80) ? 0: 1;
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}
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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