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contiki/platform/jn516x/dev/micromac-radio.c

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/*
* Copyright (c) 2014, NXP and SICS Swedish ICT.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Contiki driver for NXP JN516X using MMAC interface
* \authors
* Beshr Al Nahas <beshr@sics.se>
* Simon Duquennot <simonduq@sics.se>
* Atis Elsts <atis.elsts@sics.se>
*
*/
#include <string.h>
#include "contiki.h"
#include "dev/leds.h"
#include "sys/rtimer.h"
#include "net/packetbuf.h"
#include "net/rime/rimestats.h"
#include "net/netstack.h"
#include "net/mac/frame802154.h"
#include "lib/crc16.h"
#include "lib/ringbufindex.h"
#include "AppHardwareApi.h"
#include "MMAC.h"
#include "micromac-radio.h"
#include "JPT.h"
#include "PeripheralRegs.h"
void vMMAC_SetChannelAndPower(uint8 u8Channel, int8 i8power);
/* This driver configures the radio in PHY mode and does address decoding
* and acknowledging in software. */
#define DEBUG DEBUG_NONE
#include "net/ip/uip-debug.h"
/* Perform CRC check for received packets in SW,
* since we use PHY mode which does not calculate CRC in HW */
#define CRC_SW 1
#define CHECKSUM_LEN 2
/* Max packet duration: 5 + 127 + 2 bytes, 32us per byte */
#define MAX_PACKET_DURATION US_TO_RTIMERTICKS((127 + 2) * 32 + RADIO_DELAY_BEFORE_TX)
/* Max ACK duration: 5 + 3 + 2 bytes */
#define MAX_ACK_DURATION US_TO_RTIMERTICKS((3 + 2) * 32 + RADIO_DELAY_BEFORE_TX)
/* Test-mode pins output on dev-kit */
#define RADIO_TEST_MODE_HIGH_PWR 1
#define RADIO_TEST_MODE_ADVANCED 2
#define RADIO_TEST_MODE_DISABLED 0
#ifndef RADIO_TEST_MODE
#define RADIO_TEST_MODE RADIO_TEST_MODE_DISABLED
#endif /* RADIO_TEST_MODE */
/* The number of input buffers */
#ifndef MIRCOMAC_CONF_BUF_NUM
#define MIRCOMAC_CONF_BUF_NUM 2
#endif /* MIRCOMAC_CONF_BUF_NUM */
/* Init radio channel */
#ifndef MICROMAC_CONF_CHANNEL
#define MICROMAC_CONF_CHANNEL 26
#endif
/* Default energy level threshold for clear channel detection */
#ifndef MICROMAC_CONF_CCA_THR
#define MICROMAC_CONF_CCA_THR 39 /* approximately -85 dBm */
#endif /* MICROMAC_CONF_CCA_THR */
#if (JENNIC_CHIP == JN5169)
#define OUTPUT_POWER_MAX 10
#define OUTPUT_POWER_MIN (-32)
#define ABS_OUTPUT_POWER_MIN (32)
#else
#define OUTPUT_POWER_MAX 0
#define OUTPUT_POWER_MIN (-32)
#endif
/* Default Tx power [dBm] (between OUTPUT_POWER_MIN and OUTPUT_POWER_MAX) */
#ifndef MICROMAC_CONF_TX_POWER
#define MICROMAC_CONF_TX_POWER 0
#endif
/* Autoack */
#ifndef MICROMAC_CONF_AUTOACK
#define MICROMAC_CONF_AUTOACK 1
#endif /* MICROMAC_CONF_AUTOACK */
/* Set radio always on for now because this is what Contiki MAC layers
* expect. */
#ifndef MICROMAC_CONF_ALWAYS_ON
#define MICROMAC_CONF_ALWAYS_ON 1
#endif /* MICROMAC_CONF_ALWAYS_ON */
#define BUSYWAIT_UNTIL(cond, max_time) \
do { \
rtimer_clock_t t0; \
t0 = RTIMER_NOW(); \
while(!(cond) && RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + (max_time))) ; \
} while(0)
/* Local variables */
static volatile signed char radio_last_rssi;
static volatile uint8_t radio_last_correlation; /* LQI */
/* Did we miss a request to turn the radio on due to overflow? */
static volatile uint8_t missed_radio_on_request = 0;
/* Poll mode disabled by default */
static uint8_t poll_mode = 0;
/* (Software) frame filtering enabled by default */
static uint8_t frame_filtering = 1;
/* (Software) autoack */
static uint8_t autoack_enabled = MICROMAC_CONF_AUTOACK;
/* CCA before sending? Disabled by default. */
static uint8_t send_on_cca = 0;
/* Current radio channel */
static int current_channel = MICROMAC_CONF_CHANNEL;
/* Current set point tx power
Actual tx power may be different. Use get_txpower() for actual power */
static int current_tx_power = MICROMAC_CONF_TX_POWER;
/* an integer between 0 and 255, used only with cca() */
static uint8_t cca_thershold = MICROMAC_CONF_CCA_THR;
/* Tx in progress? */
static volatile uint8_t tx_in_progress = 0;
/* Are we currently listening? */
static volatile uint8_t listen_on = 0;
/* Is the driver currently transmitting a software ACK? */
static uint8_t in_ack_transmission = 0;
/* TX frame buffer */
static tsPhyFrame tx_frame_buffer;
/* RX frame buffer */
static tsPhyFrame *rx_frame_buffer;
/* Frame buffer pointer to read from */
static tsPhyFrame *input_frame_buffer = NULL;
/* Ringbuffer for received packets in interrupt enabled mode */
static struct ringbufindex input_ringbuf;
static tsPhyFrame input_array[MIRCOMAC_CONF_BUF_NUM];
/* SFD timestamp in RTIMER ticks */
static volatile uint32_t last_packet_timestamp = 0;
/* Local functions prototypes */
static int on(void);
static int off(void);
static int is_packet_for_us(uint8_t *buf, int len, int do_send_ack);
static void set_frame_filtering(uint8_t enable);
static rtimer_clock_t get_packet_timestamp(void);
static void set_txpower(int8_t power);
void set_channel(int c);
static void radio_interrupt_handler(uint32 mac_event);
static int get_detected_energy(void);
static int get_rssi(void);
static void read_last_rssi(void);
/*---------------------------------------------------------------------------*/
PROCESS(micromac_radio_process, "micromac_radio_driver");
/*---------------------------------------------------------------------------*/
/* Custom Radio parameters */
#ifndef RADIO_RX_MODE_POLL_MODE
#define RADIO_PARAM_LAST_RSSI 0x80
#define RADIO_PARAM_LAST_PACKET_TIMESTAMP 0x81
#define RADIO_RX_MODE_POLL_MODE (1 << 2)
#endif /* RADIO_RX_MODE_POLL_MODE */
/*---------------------------------------------------------------------------*/
static rtimer_clock_t
get_packet_timestamp(void)
{
/* Wait for an edge */
uint32_t t = u32MMAC_GetTime();
while(u32MMAC_GetTime() == t);
/* Save SFD timestamp, converted from radio timer to RTIMER */
last_packet_timestamp = RTIMER_NOW() -
RADIO_TO_RTIMER((uint32_t)(u32MMAC_GetTime() - (u32MMAC_GetRxTime() - 1)));
/* The remaining measured error is typically in range 0..16 usec.
* Center it around zero, in the -8..+8 usec range. */
last_packet_timestamp -= US_TO_RTIMERTICKS(8);
return last_packet_timestamp;
}
/*---------------------------------------------------------------------------*/
static int
init_software(void)
{
int put_index;
/* Initialize ring buffer and first input packet pointer */
ringbufindex_init(&input_ringbuf, MIRCOMAC_CONF_BUF_NUM);
/* get pointer to next input slot */
put_index = ringbufindex_peek_put(&input_ringbuf);
if(put_index == -1) {
rx_frame_buffer = NULL;
printf("micromac_radio init:! no buffer available. Abort init.\n");
off();
return 0;
} else {
rx_frame_buffer = &input_array[put_index];
}
input_frame_buffer = rx_frame_buffer;
process_start(&micromac_radio_process, NULL);
return 1;
}
/*---------------------------------------------------------------------------*/
static int
init(void)
{
int ret = 1;
tsExtAddr node_long_address;
uint16_t node_short_address;
static uint8_t is_initialized;
tx_in_progress = 0;
u32JPT_Init();
vMMAC_Enable();
/* Enable/disable interrupts */
if(poll_mode) {
vMMAC_EnableInterrupts(NULL);
vMMAC_ConfigureInterruptSources(0);
} else {
vMMAC_EnableInterrupts(&radio_interrupt_handler);
}
vMMAC_ConfigureRadio();
set_channel(current_channel);
set_txpower(current_tx_power);
vMMAC_GetMacAddress(&node_long_address);
/* Short addresses are disabled by default */
node_short_address = (uint16_t)node_long_address.u32L;
vMMAC_SetRxAddress(frame802154_get_pan_id(), node_short_address, &node_long_address);
/* Disable hardware backoff */
vMMAC_SetTxParameters(1, 0, 0, 0);
vMMAC_SetCutOffTimer(0, FALSE);
#if RADIO_TEST_MODE == RADIO_TEST_MODE_HIGH_PWR
/* Enable high power mode.
* In this mode DIO2 goes high during RX
* and DIO3 goes high during TX
**/
vREG_SysWrite(REG_SYS_PWR_CTRL,
u32REG_SysRead(REG_SYS_PWR_CTRL)
| REG_SYSCTRL_PWRCTRL_RFRXEN_MASK
| REG_SYSCTRL_PWRCTRL_RFTXEN_MASK);
#elif RADIO_TEST_MODE == RADIO_TEST_MODE_ADVANCED
/* output internal radio status on IO pins.
* See Chris@NXP email */
vREG_SysWrite(REG_SYS_PWR_CTRL,
u32REG_SysRead(REG_SYS_PWR_CTRL) | (1UL << 26UL));
#endif /* TEST_MODE */
if(!is_initialized) {
is_initialized = 1;
ret = init_software();
}
return ret;
}
/*---------------------------------------------------------------------------*/
static int
on(void)
{
/* No address matching or frame decoding */
if(rx_frame_buffer != NULL) {
vMMAC_StartPhyReceive(rx_frame_buffer,
(uint16_t)(E_MMAC_RX_START_NOW
| E_MMAC_RX_NO_FCS_ERROR) /* means: reject FCS errors */
);
} else {
missed_radio_on_request = 1;
}
ENERGEST_ON(ENERGEST_TYPE_LISTEN);
listen_on = 1;
return 1;
}
/*---------------------------------------------------------------------------*/
static int
off(void)
{
listen_on = 0;
tx_in_progress = 0;
ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
/* The following would be needed with delayed Tx/Rx functions
* vMMAC_SetCutOffTimer(0, FALSE);*/
vMMAC_RadioOff();
return 1;
}
/*---------------------------------------------------------------------------*/
static int
transmit(unsigned short payload_len)
{
if(tx_in_progress) {
return RADIO_TX_COLLISION;
}
tx_in_progress = 1;
/* Energest */
if(listen_on) {
ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
}
ENERGEST_ON(ENERGEST_TYPE_TRANSMIT);
/* Transmit and wait */
vMMAC_StartPhyTransmit(&tx_frame_buffer,
E_MMAC_TX_START_NOW |
(send_on_cca ? E_MMAC_TX_USE_CCA : E_MMAC_TX_NO_CCA));
if(poll_mode) {
BUSYWAIT_UNTIL(u32MMAC_PollInterruptSource(E_MMAC_INT_TX_COMPLETE), MAX_PACKET_DURATION);
} else {
if(in_ack_transmission) {
/* as nested interupts are not possible, the tx flag will never be cleared */
BUSYWAIT_UNTIL(FALSE, MAX_ACK_DURATION);
} else {
/* wait until the tx flag is cleared */
BUSYWAIT_UNTIL(!tx_in_progress, MAX_PACKET_DURATION);
}
}
/* Energest */
ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
if(listen_on) {
ENERGEST_ON(ENERGEST_TYPE_LISTEN);
}
tx_in_progress = 0;
/* Check error code */
int ret;
uint32_t tx_error = u32MMAC_GetTxErrors();
if(tx_error == 0) {
ret = RADIO_TX_OK;
RIMESTATS_ADD(acktx);
} else if(tx_error & E_MMAC_TXSTAT_ABORTED) {
ret = RADIO_TX_ERR;
RIMESTATS_ADD(sendingdrop);
} else if(tx_error & E_MMAC_TXSTAT_CCA_BUSY) {
ret = RADIO_TX_COLLISION;
RIMESTATS_ADD(contentiondrop);
} else if(tx_error & E_MMAC_TXSTAT_NO_ACK) {
ret = RADIO_TX_NOACK;
RIMESTATS_ADD(noacktx);
} else {
ret = RADIO_TX_ERR;
}
return ret;
}
/*---------------------------------------------------------------------------*/
static int
prepare(const void *payload, unsigned short payload_len)
{
uint8_t i;
uint16_t checksum;
RIMESTATS_ADD(lltx);
if(tx_in_progress) {
return 1;
}
if(payload_len > 127 || payload == NULL) {
return 1;
}
/* Copy payload to (soft) Ttx buffer */
memcpy(tx_frame_buffer.uPayload.au8Byte, payload, payload_len);
i = payload_len;
#if CRC_SW
/* Compute CRC */
checksum = crc16_data(payload, payload_len, 0);
tx_frame_buffer.uPayload.au8Byte[i++] = checksum;
tx_frame_buffer.uPayload.au8Byte[i++] = (checksum >> 8) & 0xff;
tx_frame_buffer.u8PayloadLength = payload_len + CHECKSUM_LEN;
#else
tx_frame_buffer.u8PayloadLength = payload_len;
#endif
return 0;
}
/*---------------------------------------------------------------------------*/
static int
send(const void *payload, unsigned short payload_len)
{
if(prepare(payload, payload_len) == 0) {
return transmit(payload_len);
} else {
return RADIO_TX_ERR;
}
}
/*---------------------------------------------------------------------------*/
int
get_channel(void)
{
return current_channel;
}
/*---------------------------------------------------------------------------*/
void
set_channel(int c)
{
current_channel = c;
/* will fine tune TX power as well */
vMMAC_SetChannel(current_channel);
}
/*---------------------------------------------------------------------------*/
static int
is_broadcast_addr(uint8_t mode, uint8_t *addr)
{
int i = ((mode == FRAME802154_SHORTADDRMODE) ? 2 : 8);
while(i-- > 0) {
if(addr[i] != 0xff) {
return 0;
}
}
return 1;
}
/*---------------------------------------------------------------------------*/
/* Send an ACK */
static void
send_ack(const frame802154_t *frame)
{
uint8_t buffer[3];
/* FCF: 2 octets */
buffer[0] = FRAME802154_ACKFRAME;
buffer[1] = 0;
/* Seqnum: 1 octets */
buffer[2] = frame->seq;
in_ack_transmission = 1;
send(&buffer, sizeof(buffer));
in_ack_transmission = 0;
}
/*---------------------------------------------------------------------------*/
/* Check if a packet is for us */
static int
is_packet_for_us(uint8_t *buf, int len, int do_send_ack)
{
frame802154_t frame;
int result;
uint8_t parsed = frame802154_parse(buf, len, &frame);
if(parsed) {
if(frame.fcf.dest_addr_mode) {
int has_dest_panid;
frame802154_has_panid(&frame.fcf, NULL, &has_dest_panid);
if(has_dest_panid
&& frame802154_get_pan_id() != FRAME802154_BROADCASTPANDID
&& frame.dest_pid != frame802154_get_pan_id()
&& frame.dest_pid != FRAME802154_BROADCASTPANDID) {
/* Packet to another PAN */
return 0;
}
if(!is_broadcast_addr(frame.fcf.dest_addr_mode, frame.dest_addr)) {
result = linkaddr_cmp((linkaddr_t *)frame.dest_addr, &linkaddr_node_addr);
if(autoack_enabled && result && do_send_ack) {
/* this is a unicast frame and sending ACKs is enabled */
send_ack(&frame);
}
return result;
}
}
return 1;
} else {
return 0;
}
}
/*---------------------------------------------------------------------------*/
static int
read(void *buf, unsigned short bufsize)
{
int len = 0;
uint16_t radio_last_rx_crc;
uint8_t radio_last_rx_crc_ok = 1;
len = input_frame_buffer->u8PayloadLength;
if(len <= CHECKSUM_LEN) {
input_frame_buffer->u8PayloadLength = 0;
return 0;
} else {
len -= CHECKSUM_LEN;
/* Check CRC */
#if CRC_SW
uint16_t checksum = crc16_data(input_frame_buffer->uPayload.au8Byte, len, 0);
radio_last_rx_crc =
(uint16_t)(input_frame_buffer->uPayload.au8Byte[len + 1] << (uint16_t)8)
| input_frame_buffer->uPayload.au8Byte[len];
radio_last_rx_crc_ok = (checksum == radio_last_rx_crc);
if(!radio_last_rx_crc_ok) {
RIMESTATS_ADD(badcrc);
}
#endif /* CRC_SW */
if(radio_last_rx_crc_ok) {
/* If we are in poll mode we need to check the frame here */
if(poll_mode) {
if(frame_filtering &&
!is_packet_for_us(input_frame_buffer->uPayload.au8Byte, len, 0)) {
len = 0;
} else {
read_last_rssi();
}
}
if(len != 0) {
bufsize = MIN(len, bufsize);
memcpy(buf, input_frame_buffer->uPayload.au8Byte, bufsize);
RIMESTATS_ADD(llrx);
if(!poll_mode) {
/* Not in poll mode: packetbuf should not be accessed in interrupt context */
packetbuf_set_attr(PACKETBUF_ATTR_RSSI, radio_last_rssi);
packetbuf_set_attr(PACKETBUF_ATTR_LINK_QUALITY, radio_last_correlation);
}
}
} else {
len = 0;
}
/* Disable further read attempts */
input_frame_buffer->u8PayloadLength = 0;
}
return len;
}
/*---------------------------------------------------------------------------*/
static void
set_txpower(int8_t power)
{
if(power > OUTPUT_POWER_MAX) {
current_tx_power = OUTPUT_POWER_MAX;
} else {
if(power < OUTPUT_POWER_MIN) {
current_tx_power = OUTPUT_POWER_MIN;
} else {
current_tx_power = power;
}
}
vMMAC_SetChannelAndPower(current_channel, current_tx_power);
}
/*--------------------------------------------------------------------------*/
static int
get_txpower(void)
{
int actual_tx_power;
#if (JENNIC_CHIP == JN5169)
/* Actual tx power value rounded to nearest integer number */
const static int8 power_table [] = {
-32, -30, -29, -29, /* -32 .. -29 */
-28, -28, -28, -28, /* -28 .. -25 */
-21, -21, -21, -2, /* -24 .. -21 */
-20, -19, -18, -17, /* -20 .. -17 */
-17, -17, -17, -10, /* -16 .. -13 */
-10, -10, -10, -9, /* -12 .. -09 */
-8, -7, -6, -6, /* -08 .. -05 */
-6, -6, 1, 1, /* -04 .. -01 */
1, 1, 2, 3, /* 00 .. 03 */
4, 5, 6, 7, /* 04 .. 07 */
9, 9, 10 }; /* 08 .. 10 */
if(current_tx_power > OUTPUT_POWER_MAX) {
actual_tx_power = OUTPUT_POWER_MAX;
} else if(current_tx_power < OUTPUT_POWER_MIN) {
actual_tx_power = OUTPUT_POWER_MIN;
} else {
actual_tx_power = power_table[current_tx_power + ABS_OUTPUT_POWER_MIN];
}
#else
/* Other JN516x chips */
if(current_tx_power < (-24)) {
actual_tx_power = OUTPUT_POWER_MIN;
} else if(current_tx_power < (-12)) {
actual_tx_power = (-20);
} else if(current_tx_power < 0) {
actual_tx_power = (-9);
} else {
actual_tx_power = OUTPUT_POWER_MAX;
}
#endif
return (int)actual_tx_power;
}
/*---------------------------------------------------------------------------*/
static int
get_detected_energy(void)
{
const uint32 u32Samples = 8;
return u8JPT_EnergyDetect(current_channel, u32Samples);
}
/*---------------------------------------------------------------------------*/
static int
get_rssi(void)
{
/* this approximate formula for RSSI is taken from NXP internal docs */
return (7 * get_detected_energy() - 1970) / 20;
}
/*---------------------------------------------------------------------------*/
static void
read_last_rssi(void)
{
uint8_t radio_last_rx_energy;
radio_last_rx_energy = u8MMAC_GetRxLqi((uint8_t *)&radio_last_correlation);
radio_last_rssi = i16JPT_ConvertEnergyTodBm(radio_last_rx_energy);
}
/*---------------------------------------------------------------------------*/
int
receiving_packet(void)
{
return bMMAC_RxDetected();
}
/*---------------------------------------------------------------------------*/
static int
pending_packet(void)
{
if(!poll_mode) {
return ringbufindex_peek_get(&input_ringbuf) != -1;
} else {
return u32MMAC_PollInterruptSource(
E_MMAC_INT_RX_COMPLETE | E_MMAC_INT_RX_HEADER);
}
}
/*---------------------------------------------------------------------------*/
static int
cca(void)
{
bool_t is_channel_busy = bJPT_CCA(current_channel,
E_JPT_CCA_MODE_CARRIER_OR_ENERGY,
cca_thershold);
return is_channel_busy == FALSE;
}
/*---------------------------------------------------------------------------*/
static void
radio_interrupt_handler(uint32 mac_event)
{
uint32_t rx_status;
uint8_t overflow = 0;
int get_index;
int put_index;
int packet_for_me = 0;
if(mac_event & E_MMAC_INT_TX_COMPLETE) {
/* Transmission attempt has finished */
tx_in_progress = 0;
} else if(mac_event & E_MMAC_INT_RX_COMPLETE) {
rx_status = u32MMAC_GetRxErrors();
/* If rx is successful */
if(rx_status == 0) {
/* Save SFD timestamp */
last_packet_timestamp = get_packet_timestamp();
if(!poll_mode && (mac_event & E_MMAC_INT_RX_COMPLETE)) {
if(rx_frame_buffer->u8PayloadLength > CHECKSUM_LEN) {
if(frame_filtering) {
/* Check RX address */
packet_for_me = is_packet_for_us(rx_frame_buffer->uPayload.au8Byte, rx_frame_buffer->u8PayloadLength - CHECKSUM_LEN, 1);
} else if(!frame_filtering) {
packet_for_me = 1;
}
}
if(!packet_for_me) {
/* Prevent reading */
rx_frame_buffer->u8PayloadLength = 0;
} else {
/* read and cache RSSI and LQI values */
read_last_rssi();
/* Put received frame in queue */
ringbufindex_put(&input_ringbuf);
if((get_index = ringbufindex_peek_get(&input_ringbuf)) != -1) {
input_frame_buffer = &input_array[get_index];
}
process_poll(&micromac_radio_process);
/* get pointer to next input slot */
put_index = ringbufindex_peek_put(&input_ringbuf);
/* is there space? */
if(put_index != -1) {
/* move rx_frame_buffer to next empty slot */
rx_frame_buffer = &input_array[put_index];
} else {
overflow = 1;
rx_frame_buffer = NULL;
}
}
}
} else { /* if rx is not successful */
if(rx_status & E_MMAC_RXSTAT_ABORTED) {
RIMESTATS_ADD(badsynch);
} else if(rx_status & E_MMAC_RXSTAT_ERROR) {
RIMESTATS_ADD(badcrc);
} else if(rx_status & E_MMAC_RXSTAT_MALFORMED) {
RIMESTATS_ADD(toolong);
}
}
}
if(overflow) {
off();
} else if(MICROMAC_CONF_ALWAYS_ON
&& (mac_event & (E_MMAC_INT_TX_COMPLETE | E_MMAC_INT_RX_COMPLETE))) {
on();
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(micromac_radio_process, ev, data)
{
PROCESS_BEGIN();
while(1) {
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
/* Pass received packets to upper layer */
int16_t read_index;
/* Loop on accessing (without removing) a pending input packet */
while((read_index = ringbufindex_peek_get(&input_ringbuf)) != -1) {
input_frame_buffer = &input_array[read_index];
/* Put packet into packetbuf for input callback */
packetbuf_clear();
int len = read(packetbuf_dataptr(), PACKETBUF_SIZE);
/* is packet valid? */
if(len > 0) {
packetbuf_set_datalen(len);
NETSTACK_RDC.input();
}
/* Remove packet from ringbuf */
ringbufindex_get(&input_ringbuf);
/* Disable further read attempts */
input_frame_buffer->u8PayloadLength = 0;
}
/* Are we recovering from overflow? */
if(rx_frame_buffer == NULL) {
/* get pointer to next input slot */
int put_index = ringbufindex_peek_put(&input_ringbuf);
/* is there space? */
if(put_index != -1) {
/* move rx_frame_buffer to next empty slot */
rx_frame_buffer = &input_array[put_index];
/* do we need to turn radio on? */
if(MICROMAC_CONF_ALWAYS_ON || missed_radio_on_request) {
missed_radio_on_request = 0;
on();
}
} else {
rx_frame_buffer = NULL;
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static void
set_frame_filtering(uint8_t enable)
{
frame_filtering = enable;
}
/*---------------------------------------------------------------------------*/
static void
set_autoack(uint8_t enable)
{
autoack_enabled = enable;
}
/*---------------------------------------------------------------------------*/
static void
set_poll_mode(uint8_t enable)
{
poll_mode = enable;
if(poll_mode) {
/* Disable interrupts */
vMMAC_EnableInterrupts(NULL);
vMMAC_ConfigureInterruptSources(0);
} else {
/* Initialize and enable interrupts */
/* TODO: enable E_MMAC_INT_RX_HEADER & filter out frames after header rx */
vMMAC_ConfigureInterruptSources(
E_MMAC_INT_RX_COMPLETE | E_MMAC_INT_TX_COMPLETE);
vMMAC_EnableInterrupts(&radio_interrupt_handler);
}
}
/* Enable or disable CCA before sending */
static void
set_send_on_cca(uint8_t enable)
{
send_on_cca = enable;
}
/*---------------------------------------------------------------------------*/
static radio_result_t
get_value(radio_param_t param, radio_value_t *value)
{
if(!value) {
return RADIO_RESULT_INVALID_VALUE;
}
switch(param) {
case RADIO_PARAM_POWER_MODE:
*value = listen_on || tx_in_progress ? RADIO_POWER_MODE_ON : RADIO_POWER_MODE_OFF;
return RADIO_RESULT_OK;
case RADIO_PARAM_CHANNEL:
*value = get_channel();
return RADIO_RESULT_OK;
case RADIO_PARAM_RX_MODE:
*value = 0;
if(frame_filtering) {
*value |= RADIO_RX_MODE_ADDRESS_FILTER;
}
if(autoack_enabled) {
*value |= RADIO_RX_MODE_AUTOACK;
}
if(poll_mode) {
*value |= RADIO_RX_MODE_POLL_MODE;
}
return RADIO_RESULT_OK;
case RADIO_PARAM_TX_MODE:
*value = 0;
if(send_on_cca) {
*value |= RADIO_TX_MODE_SEND_ON_CCA;
}
return RADIO_RESULT_OK;
case RADIO_PARAM_TXPOWER:
*value = get_txpower();
return RADIO_RESULT_OK;
case RADIO_PARAM_RSSI:
*value = get_rssi();
return RADIO_RESULT_OK;
case RADIO_PARAM_LAST_RSSI:
*value = radio_last_rssi;
return RADIO_RESULT_OK;
case RADIO_PARAM_CCA_THRESHOLD:
*value = cca_thershold;
return RADIO_RESULT_OK;
case RADIO_CONST_CHANNEL_MIN:
*value = 11;
return RADIO_RESULT_OK;
case RADIO_CONST_CHANNEL_MAX:
*value = 26;
return RADIO_RESULT_OK;
case RADIO_CONST_TXPOWER_MIN:
*value = OUTPUT_POWER_MIN;
return RADIO_RESULT_OK;
case RADIO_CONST_TXPOWER_MAX:
*value = OUTPUT_POWER_MAX;
return RADIO_RESULT_OK;
default:
return RADIO_RESULT_NOT_SUPPORTED;
}
}
/*---------------------------------------------------------------------------*/
static radio_result_t
set_value(radio_param_t param, radio_value_t value)
{
switch(param) {
case RADIO_PARAM_POWER_MODE:
if(value == RADIO_POWER_MODE_ON) {
on();
return RADIO_RESULT_OK;
}
if(value == RADIO_POWER_MODE_OFF) {
off();
return RADIO_RESULT_OK;
}
return RADIO_RESULT_INVALID_VALUE;
case RADIO_PARAM_CHANNEL:
if(value < 11 || value > 26) {
return RADIO_RESULT_INVALID_VALUE;
}
set_channel(value);
return RADIO_RESULT_OK;
case RADIO_PARAM_RX_MODE:
if(value & ~(RADIO_RX_MODE_ADDRESS_FILTER |
RADIO_RX_MODE_AUTOACK | RADIO_RX_MODE_POLL_MODE)) {
return RADIO_RESULT_INVALID_VALUE;
}
set_frame_filtering((value & RADIO_RX_MODE_ADDRESS_FILTER) != 0);
set_autoack((value & RADIO_RX_MODE_AUTOACK) != 0);
set_poll_mode((value & RADIO_RX_MODE_POLL_MODE) != 0);
return RADIO_RESULT_OK;
case RADIO_PARAM_TX_MODE:
if(value & ~(RADIO_TX_MODE_SEND_ON_CCA)) {
return RADIO_RESULT_INVALID_VALUE;
}
set_send_on_cca((value & RADIO_TX_MODE_SEND_ON_CCA) != 0);
return RADIO_RESULT_OK;
case RADIO_PARAM_TXPOWER:
if(value < OUTPUT_POWER_MIN || value > OUTPUT_POWER_MAX) {
return RADIO_RESULT_INVALID_VALUE;
/* Find the closest higher PA_LEVEL for the desired output power */
}
set_txpower(value);
return RADIO_RESULT_OK;
case RADIO_PARAM_CCA_THRESHOLD:
cca_thershold = value;
return RADIO_RESULT_OK;
default:
return RADIO_RESULT_NOT_SUPPORTED;
}
}
/*---------------------------------------------------------------------------*/
static radio_result_t
get_object(radio_param_t param, void *dest, size_t size)
{
if(param == RADIO_PARAM_LAST_PACKET_TIMESTAMP) {
if(size != sizeof(rtimer_clock_t) || !dest) {
return RADIO_RESULT_INVALID_VALUE;
}
*(rtimer_clock_t *)dest = get_packet_timestamp();
return RADIO_RESULT_OK;
}
return RADIO_RESULT_NOT_SUPPORTED;
}
/*---------------------------------------------------------------------------*/
static radio_result_t
set_object(radio_param_t param, const void *src, size_t size)
{
return RADIO_RESULT_NOT_SUPPORTED;
}
/*---------------------------------------------------------------------------*/
const struct radio_driver micromac_radio_driver = {
init,
prepare,
transmit,
send,
read,
cca,
receiving_packet,
pending_packet,
on,
off,
get_value,
set_value,
get_object,
set_object
};
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