/**
* @brief Internal TAL reset function
*
* @param set_default_pib Defines whether PIB values need to be set
* to its default values
*
* @return MAC_SUCCESS if the transceiver state is changed to TRX_OFF and the
* current device part number and version number are correct;
* FAILURE otherwise
*/
static retval_t internal_tal_reset(bool set_default_pib)
{
if (trx_reset() != MAC_SUCCESS)
{
return FAILURE;
}
/*
* Generate a seed for the random number generator in function rand().
* This is required (for example) as seed for the CSMA-CA algorithm.
*/
tal_generate_rand_seed();
/* Configure the transceiver register values. */
trx_config();
if (set_default_pib)
{
/* Set the default PIB values */
init_tal_pib(); /* implementation can be found in 'tal_pib.c' */
}
else
{
/* nothing to do - the current TAL PIB attribute values are used */
}
/*
* Write all PIB values to the transceiver
* that are needed by the transceiver itself.
*/
write_all_tal_pib_to_trx(); /* implementation can be found in 'tal_pib.c' */
/* Reset TAL variables. */
tal_state = TAL_IDLE;
#ifdef BEACON_SUPPORT
tal_csma_state = CSMA_IDLE;
#endif /* BEACON_SUPPORT */
#if ((MAC_START_REQUEST_CONFIRM == 1) && (defined BEACON_SUPPORT))
tal_beacon_transmission = false;
#endif /* ((MAC_START_REQUEST_CONFIRM == 1) && (defined BEACON_SUPPORT)) */
tal_rx_on_required = false;
return MAC_SUCCESS;
}
/*
* \brief Initializes the TAL
*
* This function is called to initialize the TAL. The transceiver is
* initialized, the TAL PIBs are set to their default values, and the TAL state
* machine is set to TAL_IDLE state.
*
* \return MAC_SUCCESS if the transceiver state is changed to TRX_OFF and the
* current device part number and version number are correct;
* FAILURE otherwise
*/
retval_t tal_init(void)
{
/* Init the PAL and by this means also the transceiver interface */
if (pal_init() != MAC_SUCCESS) {
return FAILURE;
}
if (trx_init() != MAC_SUCCESS) {
return FAILURE;
}
if (tal_timer_init() != MAC_SUCCESS) {
return FAILURE;
}
#ifdef ENABLE_STACK_NVM
pal_ps_get(INTERN_EEPROM, EE_IEEE_ADDR, 8, &tal_pib.IeeeAddress);
#endif
/*
* For systems including the AT86RF230B the random seed generation
* cannot be done using a dedicated hardware feature.
* Therefore all random seed generation needs to be done by special
* means (e.g. utilization of ADC) that generate a random value only
* within a certain range.
*
* In case the node already has a valid IEEE address (i.e. an IEEE
* address which is different from 0x0000000000000000 or
* 0xFFFFFFFFFFFFFFFF), this IEEE address (the lower 16 bit)
* shall be used as seed for srand(), since each node should have a
*unique
* IEEE address.
* In this case srand() is called directly and function
*tal_generate_rand_seed()
* is not called.
*
* Note: This behaviour is different in all other TALs, since in these
* cases the seed for srand() is always generated based on transceiver
* hardware support.
*/
#ifndef DISABLE_IEEE_ADDR_CHECK
if ((tal_pib.IeeeAddress == 0x0000000000000000) ||
(tal_pib.IeeeAddress == 0xFFFFFFFFFFFFFFFF)
) {
/*
* Generate a seed for the random number generator in function
*rand().
* This is required (for example) as seed for the CSMA-CA
*algorithm.
*/
tal_generate_rand_seed();
/*
* Now that we have generated a random seed, we can generate a
*random
* IEEE address for this node.
*/
do {
/*
* In case no valid IEEE address is available, a random
* IEEE address will be generated to be able to run the
* applications for demonstration purposes.
* In production code this can be omitted.
*/
/*
* The proper seed for function rand() has already been
*generated
* in function tal_generate_rand_seed().
*/
uint8_t *ptr_pib = (uint8_t *)&tal_pib.IeeeAddress;
for (uint8_t i = 0; i < 8; i++) {
*ptr_pib++ = (uint8_t)rand();
/*
* Note:
* Even if casting the 16 bit rand value back to
*8 bit,
* and running the loop 8 timers (instead of
*only 4 times)
* may look cumbersome, it turns out that the
*code gets
* smaller using 8-bit here.
* And timing is not an issue at this place...
*/
}
}
/* Check if a valid IEEE address is available. */
while ((tal_pib.IeeeAddress == 0x0000000000000000) ||
(tal_pib.IeeeAddress == 0xFFFFFFFFFFFFFFFF)
);
} else {
/* Valid IEEE address, so no need to generate a new random seed.
**/
uint16_t cur_rand_seed = (uint16_t)tal_pib.IeeeAddress;
srand(cur_rand_seed);
}
#else
/*
* No check for a valid IEEE address done, so directly create a seed
* for srand().
*/
tal_generate_rand_seed();
#endif
/*
* Do the reset stuff.
* Set the default PIBs.
*/
if (internal_tal_reset(true) != MAC_SUCCESS) {
return FAILURE;
}
pal_trx_reg_read(RG_IRQ_STATUS); /* clear pending irqs, dummy read */
/*
* Configure interrupt handling.
* Install a handler for the transceiver interrupt.
*/
pal_trx_irq_init((FUNC_PTR)trx_irq_handler_cb);
pal_trx_irq_en(); /* Enable transceiver main interrupt. */
/* Initialize the buffer management module and get a buffer to store
*reveived frames. */
bmm_buffer_init();
tal_rx_buffer = bmm_buffer_alloc(LARGE_BUFFER_SIZE);
/* Init incoming frame queue */
#ifdef ENABLE_QUEUE_CAPACITY
qmm_queue_init(&tal_incoming_frame_queue,
TAL_INCOMING_FRAME_QUEUE_CAPACITY);
#else
qmm_queue_init(&tal_incoming_frame_queue);
#endif /* ENABLE_QUEUE_CAPACITY */
return MAC_SUCCESS;
} /* tal_init() */
/**
* @brief Initializes the TAL
*
* This function is called to initialize the TAL. The transceiver is
* initialized, the TAL PIBs are set to their default values, and the TAL state
* machine is set to TAL_IDLE state.
*
* @return MAC_SUCCESS if the transceiver state is changed to TRX_OFF and the
* current device part number and version number are correct;
* FAILURE otherwise
*/
retval_t tal_init(void)
{
/* Init the PAL and by this means also the transceiver interface */
if (pal_init() != MAC_SUCCESS) {
return FAILURE;
}
/* Reset trx */
if (trx_reset(RFBOTH) != MAC_SUCCESS) {
return FAILURE;
}
/* Check if RF215 is connected */
if ((trx_reg_read( RG_RF_PN) != 0x34) ||
(trx_reg_read( RG_RF_VN) != 0x01)) {
return FAILURE;
}
/* Initialize trx */
trx_init();
if (tal_timer_init() != MAC_SUCCESS) {
return FAILURE;
}
/* Initialize the buffer management */
bmm_buffer_init();
/* Configure both trx and set default PIB values */
for (uint8_t trx_id = 0; trx_id < NUM_TRX; trx_id++) {
/* Configure transceiver */
trx_config((trx_id_t)trx_id);
#ifdef RF215V1
/* Calibrate LO */
calibrate_LO((trx_id_t)trx_id);
#endif
/* Set the default PIB values */
init_tal_pib((trx_id_t)trx_id); /* see 'tal_pib.c' */
calculate_pib_values((trx_id_t)trx_id);
/*
* Write all PIB values to the transceiver
* that are needed by the transceiver itself.
*/
write_all_tal_pib_to_trx((trx_id_t)trx_id); /* see 'tal_pib.c'
**/
config_phy((trx_id_t)trx_id);
tal_rx_buffer[trx_id] = bmm_buffer_alloc(LARGE_BUFFER_SIZE);
if (tal_rx_buffer[trx_id] == NULL) {
return FAILURE;
}
/* Init incoming frame queue */
qmm_queue_init(&tal_incoming_frame_queue[trx_id]);
tal_state[trx_id] = TAL_IDLE;
tx_state[trx_id] = TX_IDLE;
}
/* Init seed of rand() */
tal_generate_rand_seed();
#ifndef DISABLE_IEEE_ADDR_CHECK
for (uint8_t trx_id = 0; trx_id < 2; trx_id++) {
/* Check if a valid IEEE address is available. */
/*
* This while loop is on purpose, since just in the
* rare case that such an address is randomly
* generated again, we must repeat this.
*/
while ((tal_pib[trx_id].IeeeAddress == 0x0000000000000000) ||
(tal_pib[trx_id].IeeeAddress ==
((uint64_t)-1))) {
/*
* In case no valid IEEE address is available, a random
* IEEE address will be generated to be able to run the
* applications for demonstration purposes.
* In production code this can be omitted.
*/
/*
* The proper seed for function rand() has already been
*generated
* in function tal_generate_rand_seed().
*/
uint8_t *ptr_pib
= (uint8_t *)&tal_pib[trx_id].IeeeAddress;
for (uint8_t i = 0; i < 8; i++) {
*ptr_pib++ = (uint8_t)rand();
/*
* Note:
* Even if casting the 16 bit rand value back to
*8 bit,
* and running the loop 8 timers (instead of
*only 4 times)
* may look cumbersome, it turns out that the
*code gets
* smaller using 8-bit here.
* And timing is not an issue at this place...
*/
}
}
}
#endif
#ifdef IQ_RADIO
/* Init BB IRQ handler */
pal_trx_irq_flag_clr(RF215_BB);
trx_irq_init(RF215_BB, bb_irq_handler_cb);
pal_trx_irq_en(RF215_BB);
/* Init RF IRQ handler */
pal_trx_irq_flag_clr(RF215_RF);
trx_irq_init(RF215_RF, rf_irq_handler_cb);
pal_trx_irq_en(RF215_RF);
#else
/*
* Configure interrupt handling.
* Install a handler for the radio and the baseband interrupt.
*/
pal_trx_irq_flag_clr();
trx_irq_init((FUNC_PTR)trx_irq_handler_cb);
pal_trx_irq_en(); /* Enable transceiver main interrupt. */
#endif
#if ((defined SUPPORT_FSK) && (defined SUPPORT_MODE_SWITCH))
init_mode_switch();
#endif
return MAC_SUCCESS;
} /* tal_init() */