/**
* @brief Reset transceiver
*
* @return MAC_SUCCESS if the transceiver state is changed to TRX_OFF
* FAILURE otherwise
*/
static retval_t trx_reset(void)
{
tal_trx_status_t trx_status;
uint8_t poll_counter = 0;
#if (EXTERN_EEPROM_AVAILABLE == 1)
uint8_t xtal_trim_value;
#endif
/* Get trim value for 16 MHz xtal; needs to be done before reset */
#if (EXTERN_EEPROM_AVAILABLE == 1)
pal_ps_get(EXTERN_EEPROM, EE_XTAL_TRIM_ADDR, 1, &xtal_trim_value);
#endif
/* trx might sleep, so wake it up */
PAL_SLP_TR_LOW();
pal_timer_delay(SLEEP_TO_TRX_OFF_TYP_US);
/* Apply reset pulse */
PAL_RST_LOW();
pal_timer_delay(RST_PULSE_WIDTH_US);
PAL_RST_HIGH();
/* verify that trx has reached TRX_OFF */
do
{
/* Wait a short time interval. */
pal_timer_delay(TRX_POLL_WAIT_TIME_US);
trx_status = (tal_trx_status_t)pal_trx_bit_read(SR_TRX_STATUS);
/* Wait not more than max. value of TR2. */
if (poll_counter == SLEEP_TO_TRX_OFF_ATTEMPTS)
{
#if (DEBUG > 0)
pal_alert();
#endif
return FAILURE;
}
poll_counter++;
}
while (trx_status != TRX_OFF);
tal_trx_status = TRX_OFF;
// Write 16MHz xtal trim value to trx.
// It's only necessary if it differs from the reset value.
#if (EXTERN_EEPROM_AVAILABLE == 1)
if (xtal_trim_value != 0x00)
{
pal_trx_bit_write(SR_XTAL_TRIM, xtal_trim_value);
}
#endif
return MAC_SUCCESS;
}
/**
* \brief Reset transceiver
*/
static retval_t trx_reset(void)
{
tal_trx_status_t trx_status;
uint8_t poll_counter = 0;
#if (EXTERN_EEPROM_AVAILABLE == 1)
uint8_t xtal_trim_value;
#endif
/* Get trim value for 16 MHz xtal; needs to be done before reset */
#if (EXTERN_EEPROM_AVAILABLE == 1)
pal_ps_get(EXTERN_EEPROM, EE_XTAL_TRIM_ADDR, 1, &xtal_trim_value);
#endif
/* trx might sleep, so wake it up */
PAL_SLP_TR_LOW();
pal_timer_delay(SLEEP_TO_TRX_OFF_US);
PAL_RST_LOW();
pal_timer_delay(RST_PULSE_WIDTH_US);
PAL_RST_HIGH();
/* verify that trx has reached TRX_OFF */
do {
trx_status = (tal_trx_status_t)pal_trx_bit_read(SR_TRX_STATUS);
poll_counter++;
if (poll_counter > 250) {
#if (_DEBUG_ > 0)
Assert(
"MAX Attempts to switch to TRX_OFF state reached" ==
0);
#endif
return FAILURE;
}
} while (trx_status != TRX_OFF);
tal_trx_status = TRX_OFF;
/* Write 16MHz xtal trim value to trx. */
/* It's only necessary if it differs from the reset value. */
#if (EXTERN_EEPROM_AVAILABLE == 1)
if (xtal_trim_value != 0x00) {
pal_trx_bit_write(SR_XTAL_TRIM, xtal_trim_value);
}
#endif
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 (EXTERN_EEPROM_AVAILABLE == 1)
pal_ps_get(EXTERN_EEPROM, EE_IEEE_ADDR, 8, &tal_pib.IeeeAddress);
#else
pal_ps_get(INTERN_EEPROM, EE_IEEE_ADDR, 8, &tal_pib.IeeeAddress);
#endif
/*
* Do the reset stuff.
* Set the default PIBs.
* Generate random seed.
*/
if (internal_tal_reset(true) != MAC_SUCCESS)
{
return FAILURE;
}
#ifndef DISABLE_IEEE_ADDR_CHECK
/* 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.IeeeAddress == 0x0000000000000000) ||
(tal_pib.IeeeAddress == 0xFFFFFFFFFFFFFFFF)
)
{
/*
* 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...
*/
}
}
#endif /* #ifndef DISABLE_IEEE_ADDR_CHECK */
/*
* Configure interrupt handling.
* Install handlers for the transceiver interrupts.
*/
pal_trx_irq_init_rx_end((FUNC_PTR)trx_rx_end_handler_cb);
pal_trx_irq_init_tx_end((FUNC_PTR)trx_tx_end_handler_cb);
pal_trx_irq_init_awake((FUNC_PTR)trx_awake_handler_cb);
#if (defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP)
/* Configure time stamp interrupt. */
pal_trx_irq_init_tstamp((FUNC_PTR)trx_irq_timestamp_handler_cb);
#endif /* (defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP) */
/* 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 */
#ifdef ENABLE_TFA
tfa_init();
#endif
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 */
#ifdef ENABLE_RP
/*
* The ranging processor (RP) only performs a minimalistic
* initialization here.
*/
pal_basic_init();
#else /* !ENABLE_RP */
if (pal_init() != MAC_SUCCESS)
{
return FAILURE;
}
if (trx_init() != MAC_SUCCESS)
{
return FAILURE;
}
#if (EXTERN_EEPROM_AVAILABLE == 1)
pal_ps_get(EXTERN_EEPROM, EE_IEEE_ADDR, 8, &tal_pib.IeeeAddress);
#else
#if (USER_SIGN_AVAILABLE == 1)
pal_ps_get(USER_SIGNATURE, USER_SIGNATURES_START + 2, 8, &tal_pib.IeeeAddress);
//http://www.atmel.com/Images/Atmel-42172-Wireless-ZigBit-ATZB-X0-256-3-0-C_Datasheet.pdf
#else
pal_ps_get(INTERN_EEPROM, EE_IEEE_ADDR, 8, &tal_pib.IeeeAddress);
#endif
#endif
/*
* Do the reset stuff.
* Set the default PIBs.
* Generate random seed.
*/
if (internal_tal_reset(true) != MAC_SUCCESS)
{
return FAILURE;
}
#ifndef DISABLE_IEEE_ADDR_CHECK
/* 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.IeeeAddress == 0x0000000000000000) ||
(tal_pib.IeeeAddress == 0xFFFFFFFFFFFFFFFF))
{
/*
* 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...
*/
}
}
#endif /* #ifndef DISABLE_IEEE_ADDR_CHECK */
#endif /* ENABLE_RP */
/*
* Configure interrupt handling.
* Install a handler for the transceiver interrupt.
*/
pal_trx_irq_init(trx_irq_handler_cb);
#ifndef ENABLE_RP
pal_trx_irq_en(); /* Enable transceiver main interrupt. */
#endif
#if ((defined BEACON_SUPPORT) || (defined ENABLE_TSTAMP)) && (DISABLE_TSTAMP_IRQ == 0)
/* Configure time stamp interrupt. */
pal_trx_irq_init_tstamp(trx_irq_timestamp_handler_cb);
#ifndef ENABLE_RP
pal_trx_irq_en_tstamp(); /* Enable timestamp interrupt. */
#endif
#endif
/* Initialize the buffer management module and get a buffer to store received frames. */
bmm_buffer_init();
tal_rx_buffer = bmm_buffer_alloc(LARGE_BUFFER_SIZE);
#if DEBUG > 0
if (tal_rx_buffer == NULL)
{
return FAILURE;
}
#endif
/* 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 */
#ifdef ENABLE_TFA
tfa_init();
#endif
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;
}
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() */