Atmel Software Framework

at86rf231/src/tal_slotted_csma.c File Reference
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include "pal.h"
#include "return_val.h"
#include "tal.h"
#include "ieee_const.h"
#include "tal_constants.h"
#include "tal_slotted_csma.h"
#include "tal_pib.h"
#include "at86rf231.h"
#include "tal_internal.h"
#include "tal_tx.h"
#include "tal_irq_handler.h"
#include "mac_build_config.h"

Macros

#define ACK_FRAME   (0x02)
 
#define ACK_FRAME_LEN   (0x05)
 
#define CCA_GUARD_DURATION_US
 
#define CONVERT_OCTETS_TO_SYM(octets)   (2 * octets)
 
#define CSMA_BEACON_LOSS_GUARD_TIME_US   (2000)
 
#define PRE_BEACON_GUARD_TIME_US   (1000)
 

Functions

static void beacon_loss_timer_cb (void *parameter)
 Handler for beacon loss timer. More...
 
uint16_t calc_frame_transmit_duration (uint8_t *phy_frame)
 Calculates the entire transaction duration. More...
 
static void calculate_transaction_duration (void)
 Calculates the entire transaction duration. More...
 
static void cca_timer_handler_cb (void *parameter)
 CCA timer callback. More...
 
static bool check_beacon_reception (void)
 Checks if node is receiving beacons. More...
 
static void csma_backoff_calculation (void)
 Calculates backoff duration and handles the start of the CCA. More...
 
static void csma_param_init (void)
 Initializes CSMA variables. More...
 
static uint8_t perform_cca_twice (void)
 Performs CCA twice. More...
 
static void send_frame_at_next_backoff_boundary (void)
 Sends the frame at the next backoff boundary. More...
 
bool slotted_csma_start (bool perform_frame_retry)
 Starts slotted CSMA. More...
 
void slotted_csma_state_handling (void)
 State machine handling slotted CSMA. More...
 
static void start_beacon_loss_timer (void)
 Starts the beacon loss timer. More...
 
static void tx_done (retval_t status)
 Finalizes the CSMA procedure. More...
 

Variables

static uint8_t BE
 
static uint32_t cca_starttime_us
 
static uint8_t NB
 
static uint8_t number_of_tx_retries
 
static uint8_t remaining_backoff_periods
 
static uint8_t transaction_duration_periods