217 lines
9.2 KiB
C
217 lines
9.2 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* CC2420 driver header file
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* \author
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* Adam Dunkels <adam@sics.se>
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* Joakim Eriksson <joakime@sics.se>
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*/
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#ifndef CC2420_H_
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#define CC2420_H_
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#include "contiki.h"
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#include "dev/spi.h"
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#include "dev/radio.h"
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#include "cc2420_const.h"
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int cc2420_init(void);
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#define CC2420_MAX_PACKET_LEN 127
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int cc2420_set_channel(int channel);
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int cc2420_get_channel(void);
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void cc2420_set_pan_addr(unsigned pan,
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unsigned addr,
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const uint8_t *ieee_addr);
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extern signed char cc2420_last_rssi;
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extern uint8_t cc2420_last_correlation;
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int cc2420_rssi(void);
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extern const struct radio_driver cc2420_driver;
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/**
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* \param power Between 1 and 31.
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*/
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void cc2420_set_txpower(uint8_t power);
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int cc2420_get_txpower(void);
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#define CC2420_TXPOWER_MAX 31
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#define CC2420_TXPOWER_MIN 0
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/**
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* Interrupt function, called from the simple-cc2420-arch driver.
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*
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*/
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int cc2420_interrupt(void);
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/* XXX hack: these will be made as Chameleon packet attributes */
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extern rtimer_clock_t cc2420_time_of_arrival,
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cc2420_time_of_departure;
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extern int cc2420_authority_level_of_sender;
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int cc2420_on(void);
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int cc2420_off(void);
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void cc2420_set_cca_threshold(int value);
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/************************************************************************/
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/* Additional SPI Macros for the CC2420 */
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/************************************************************************/
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/* Send a strobe to the CC2420 */
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#define CC2420_STROBE(s) \
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do { \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE(s); \
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CC2420_SPI_DISABLE(); \
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} while (0)
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/* Write to a register in the CC2420 */
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/* Note: the SPI_WRITE(0) seems to be needed for getting the */
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/* write reg working on the Z1 / MSP430X platform */
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#define CC2420_WRITE_REG(adr,data) \
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do { \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE_FAST(adr); \
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SPI_WRITE_FAST((uint8_t)((data) >> 8)); \
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SPI_WRITE_FAST((uint8_t)(data & 0xff)); \
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SPI_WAITFORTx_ENDED(); \
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SPI_WRITE(0); \
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CC2420_SPI_DISABLE(); \
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} while(0)
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/* Read a register in the CC2420 */
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#define CC2420_READ_REG(adr,data) \
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do { \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE(adr | 0x40); \
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data = (uint8_t)SPI_RXBUF; \
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SPI_TXBUF = 0; \
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SPI_WAITFOREORx(); \
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data = SPI_RXBUF << 8; \
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SPI_TXBUF = 0; \
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SPI_WAITFOREORx(); \
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data |= SPI_RXBUF; \
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CC2420_SPI_DISABLE(); \
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} while(0)
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#define CC2420_READ_FIFO_BYTE(data) \
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do { \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE(CC2420_RXFIFO | 0x40); \
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(void)SPI_RXBUF; \
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SPI_READ(*data); \
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clock_delay(1); \
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CC2420_SPI_DISABLE(); \
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} while(0)
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#define CC2420_READ_FIFO_BUF(buffer,count) \
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do { \
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uint8_t i; \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE(CC2420_RXFIFO | 0x40); \
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(void)SPI_RXBUF; \
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for(i = 0; i < (count); i++) { \
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SPI_READ(((uint8_t *)(buffer))[i]); \
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} \
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clock_delay(1); \
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CC2420_SPI_DISABLE(); \
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} while(0)
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#define CC2420_WRITE_FIFO_BUF(buffer,count) \
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do { \
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uint8_t i; \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE_FAST(CC2420_TXFIFO); \
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for(i = 0; i < (count); i++) { \
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SPI_WRITE_FAST(((uint8_t *)(buffer))[i]); \
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} \
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SPI_WAITFORTx_ENDED(); \
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CC2420_SPI_DISABLE(); \
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} while(0)
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enum cc2420_write_ram_order {
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/* Begin with writing the first given byte */
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CC2420_WRITE_RAM_IN_ORDER,
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/* Begin with writing the last given byte */
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CC2420_WRITE_RAM_REVERSE
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};
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/* Write to RAM in the CC2420 */
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#define CC2420_WRITE_RAM(buffer,adr,count,order) \
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do { \
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uint8_t i; \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE_FAST(0x80 | ((adr) & 0x7f)); \
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SPI_WRITE_FAST(((adr) >> 1) & 0xc0); \
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if(order == CC2420_WRITE_RAM_IN_ORDER) { \
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for(i = 0; i < (count); i++) { \
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SPI_WRITE_FAST(((uint8_t*)(buffer))[i]); \
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} \
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} else { \
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for(i = (count); i > 0; i--) { \
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SPI_WRITE_FAST(((uint8_t*)(buffer))[i - 1]); \
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} \
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} \
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SPI_WAITFORTx_ENDED(); \
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CC2420_SPI_DISABLE(); \
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} while(0)
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/* Read from RAM in the CC2420 */
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#define CC2420_READ_RAM(buffer,adr,count) \
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do { \
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uint8_t i; \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE(0x80 | ((adr) & 0x7f)); \
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SPI_WRITE((((adr) >> 1) & 0xc0) | 0x20); \
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SPI_RXBUF; \
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for(i = 0; i < (count); i++) { \
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SPI_READ(((uint8_t*)(buffer))[i]); \
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} \
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CC2420_SPI_DISABLE(); \
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} while(0)
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/* Read status of the CC2420 */
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#define CC2420_GET_STATUS(s) \
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do { \
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CC2420_SPI_ENABLE(); \
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SPI_WRITE(CC2420_SNOP); \
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s = SPI_RXBUF; \
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CC2420_SPI_DISABLE(); \
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} while (0)
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#endif /* CC2420_H_ */
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