mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
|
|
* Copyright (C) 2015-2016 Freie Universität Berlin
|
|
* 2016 Inria
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU Lesser
|
|
* General Public License v2.1. See the file LICENSE in the top level
|
|
* directory for more details.
|
|
*/
|
|
|
|
/**
|
|
* @ingroup drivers_cc2420
|
|
* @{
|
|
*
|
|
* @file
|
|
* @brief Implementation of driver internal functions
|
|
*
|
|
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
|
|
* @author Francisco Acosta <francisco.acosta@inria.fr>
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#include "periph/spi.h"
|
|
#include "periph/gpio.h"
|
|
#include "xtimer.h"
|
|
|
|
#include "cc2420_internal.h"
|
|
#include "cc2420_registers.h"
|
|
|
|
#define SPI_BUS (dev->params.spi)
|
|
#define SPI_CS (dev->params.pin_cs)
|
|
#define SPI_MODE (SPI_MODE_0)
|
|
#define SPI_CLK (dev->params.spi_clk)
|
|
|
|
uint8_t cc2420_strobe(const cc2420_t *dev, const uint8_t command)
|
|
{
|
|
uint8_t res;
|
|
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
res = spi_transfer_byte(SPI_BUS, SPI_CS, false, command);
|
|
spi_release(SPI_BUS);
|
|
|
|
return res;
|
|
}
|
|
|
|
void cc2420_reg_write(const cc2420_t *dev,
|
|
const uint8_t addr,
|
|
const uint16_t value)
|
|
{
|
|
uint16_t tmp = byteorder_htons(value).u16;
|
|
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
spi_transfer_regs(SPI_BUS, SPI_CS, (CC2420_REG_WRITE | addr), &tmp, NULL, 2);
|
|
spi_release(SPI_BUS);
|
|
}
|
|
|
|
uint16_t cc2420_reg_read(const cc2420_t *dev, const uint8_t addr)
|
|
{
|
|
network_uint16_t tmp;
|
|
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
spi_transfer_regs(SPI_BUS, SPI_CS, (CC2420_REG_READ | addr),NULL, &tmp, 2);
|
|
spi_release(SPI_BUS);
|
|
|
|
return byteorder_ntohs(tmp);
|
|
}
|
|
|
|
void cc2420_ram_read(const cc2420_t *dev, const uint16_t addr,
|
|
uint8_t *data, const size_t len)
|
|
{
|
|
uint8_t tmp[] = { (CC2420_RAM | (addr & 0x7f)),
|
|
(CC2420_RAM_READ | ((addr >> 1) & 0xc0)) };
|
|
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
spi_transfer_bytes(SPI_BUS, SPI_CS, true, tmp, NULL, 2);
|
|
spi_transfer_bytes(SPI_BUS, SPI_CS, false, NULL, data, len);
|
|
spi_release(SPI_BUS);
|
|
}
|
|
|
|
void cc2420_ram_write(const cc2420_t *dev, const uint16_t addr,
|
|
const uint8_t *data, const size_t len)
|
|
{
|
|
uint8_t tmp[] = { (CC2420_RAM | (addr & 0x7f)),
|
|
(CC2420_RAM_WRITE | ((addr >> 1) & 0xc0)) };
|
|
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
spi_transfer_bytes(SPI_BUS, SPI_CS, true, tmp, NULL, 2);
|
|
spi_transfer_bytes(SPI_BUS, SPI_CS, false, data, NULL, len);
|
|
spi_release(SPI_BUS);
|
|
}
|
|
|
|
void cc2420_fifo_read(const cc2420_t *dev, uint8_t *data, const size_t len)
|
|
{
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
spi_transfer_regs(SPI_BUS, SPI_CS, CC2420_FIFO_READ, NULL, data, len);
|
|
spi_release(SPI_BUS);
|
|
}
|
|
|
|
void cc2420_fifo_write(const cc2420_t *dev, uint8_t *data, const size_t len)
|
|
{
|
|
spi_acquire(SPI_BUS, SPI_CS, SPI_MODE, SPI_CLK);
|
|
spi_transfer_regs(SPI_BUS, SPI_CS, CC2420_FIFO_WRITE, data, NULL, len);
|
|
gpio_set(dev->params.pin_cs);
|
|
spi_release(SPI_BUS);
|
|
}
|
|
|
|
uint8_t cc2420_status(cc2420_t *dev)
|
|
{
|
|
return cc2420_strobe(dev, CC2420_STROBE_NOP);
|
|
}
|
|
|
|
uint8_t cc2420_state(cc2420_t *dev)
|
|
{
|
|
return (uint8_t)cc2420_reg_read(dev, CC2420_REG_FSMSTATE);
|
|
}
|
|
|
|
void cc2420_en_xosc(cc2420_t *dev)
|
|
{
|
|
cc2420_strobe(dev, CC2420_STROBE_XOSCON);
|
|
xtimer_usleep(CC2420_XOSCON_DELAY);
|
|
}
|