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95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* Copyright (C) 2014 INRIA
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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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/**
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* @ingroup drivers_at86rf231
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* @{
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*
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* @file
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* @brief Register access functions for the AT86RF231 device driver
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*
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* @author Alaeddine Weslati <alaeddine.weslati@inria.fr>
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* @author Thomas Eichinger <thomas.eichinger@fu-berlin.de>
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* @author Joakim Gebart <joakim.gebart@eistec.se>
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*
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* @}
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*/
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#include "at86rf231_spi.h"
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#include "at86rf231.h"
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#include "board.h"
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#include "periph/spi.h"
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#include "periph/gpio.h"
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void at86rf231_reg_write(uint8_t addr, uint8_t value)
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{
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/* Acquire exclusive access to the bus. */
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spi_acquire(AT86RF231_SPI);
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/* Start the SPI transfer */
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gpio_clear(AT86RF231_CS);
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/* write to register */
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spi_transfer_reg(AT86RF231_SPI, AT86RF231_ACCESS_REG | AT86RF231_ACCESS_WRITE | addr, value, 0);
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/* End the SPI transfer */
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gpio_set(AT86RF231_CS);
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/* Release the bus for other threads. */
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spi_release(AT86RF231_SPI);
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}
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uint8_t at86rf231_reg_read(uint8_t addr)
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{
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char value;
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/* Acquire exclusive access to the bus. */
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spi_acquire(AT86RF231_SPI);
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/* Start the SPI transfer */
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gpio_clear(AT86RF231_CS);
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/* read from register */
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spi_transfer_reg(AT86RF231_SPI, AT86RF231_ACCESS_REG | AT86RF231_ACCESS_READ | addr, 0, &value);
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/* End the SPI transfer */
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gpio_set(AT86RF231_CS);
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/* Release the bus for other threads. */
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spi_release(AT86RF231_SPI);
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return (uint8_t)value;
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}
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void at86rf231_read_fifo(uint8_t *data, radio_packet_length_t length)
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{
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/* Acquire exclusive access to the bus. */
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spi_acquire(AT86RF231_SPI);
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/* Start the SPI transfer */
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gpio_clear(AT86RF231_CS);
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/* Read a number of bytes from the devices frame buffer */
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spi_transfer_regs(AT86RF231_SPI, AT86RF231_ACCESS_FRAMEBUFFER | AT86RF231_ACCESS_READ,
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0, (char*)data, length);
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/* End the SPI transfer */
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gpio_set(AT86RF231_CS);
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/* Release the bus for other threads. */
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spi_release(AT86RF231_SPI);
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}
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void at86rf231_write_fifo(const uint8_t *data, radio_packet_length_t length)
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{
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/* Acquire exclusive access to the bus. */
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spi_acquire(AT86RF231_SPI);
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/* Start the SPI transfer */
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gpio_clear(AT86RF231_CS);
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/* Send Frame Buffer Write access */
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spi_transfer_regs(AT86RF231_SPI, AT86RF231_ACCESS_FRAMEBUFFER | AT86RF231_ACCESS_WRITE,
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(char*)data, 0, length);
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/* End the SPI transfer */
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gpio_set(AT86RF231_CS);
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/* Release the bus for other threads. */
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spi_release(AT86RF231_SPI);
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}
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uint8_t at86rf231_get_status(void)
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{
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return (at86rf231_reg_read(AT86RF231_REG__TRX_STATUS)
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& AT86RF231_TRX_STATUS_MASK__TRX_STATUS);
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}
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