/**
@internal
@brief
Function registered to #ZCL_TIME_ATTR_TIME attribute of Time Cluster and
called to refresh the Time attribute (global zcl_time_time).
See zcl_attribute_update_fn() for calling convention.
*/
_zcl_time_debug
uint_fast8_t _zcl_time_time_get( const zcl_attribute_full_t FAR *attribute)
{
// zcl_attribute_update_fn API, but 'attribute' parameter's value is always
// a pointer to 'zcl_time_time' variable.
XBEE_UNUSED_PARAMETER( attribute);
#if ZCL_TIME_EPOCH_DELTA > 0
if (! zcl_time_skew && xbee_seconds_timer() < ZCL_TIME_EPOCH_DELTA)
{
// we don't really know what time it is...
zcl_time_time = ZCL_UTCTIME_INVALID;
}
else
#endif
{
zcl_time_time = zcl_time_skew +
(xbee_seconds_timer() - ZCL_TIME_EPOCH_DELTA);
}
#ifdef ZCL_TIME_VERBOSE
printf( "%s: read clock & updated zcl_time_time to 0x%" PRIx32 "\n",
__FUNCTION__, zcl_time_time);
#endif
return ZCL_STATUS_SUCCESS;
}
/* START FUNCTION DESCRIPTION ********************************************
_wpan_endpoint_expire_conversations <wpan_aps.c>
SYNTAX:
void _wpan_endpoint_expire_conversations( wpan_ep_state_t FAR *state)
DESCRIPTION:
Walk an endpoint's conversation table and expire any conversations
that have timed out.
PARAMETER1: state - endpoint state (from endpoint table)
**************************************************************************/
wpan_aps_debug
void _wpan_endpoint_expire_conversations( wpan_ep_state_t FAR *state)
{
wpan_conversation_t FAR *conversation;
uint_fast8_t i;
uint16_t now;
if (state == NULL)
{
return;
}
/*
Notes regarding timeout calculation: We just store the lower 16 bits of
the xbee_seconds_timer() value of when we should timeout. We can tell
whether we're before or after that time by subtracting the target time
from the curent time. If the result as a signed integer is >= 0, we
have passed the selected timeout value.
*/
now = (uint16_t) xbee_seconds_timer();
conversation = state->conversations;
for (i = WPAN_MAX_CONVERSATIONS; i; ++conversation, --i)
{
if (conversation->handler != NULL
&& conversation->timeout != 0
&& (int16_t)(now - conversation->timeout) >= 0)
{
// send timeout to conversation's handler, ignore the response
conversation->handler( conversation, NULL);
wpan_conversation_delete( conversation);
}
}
}
/**
@internal
@brief
Function registered to #ZCL_TIME_ATTR_TIME attribute of Time Cluster and
called to modify the attribute. Also called internally to update the
zcl_time_skew global.
@param[in] attribute ignored; assumed to point to zcl_time_time
@param[in,out] rec if NULL, function was called internally to update
zcl_time_skew only
See zcl_attribute_write_fn() for calling convention.
*/
_zcl_time_debug
int _zcl_time_time_set( const zcl_attribute_full_t FAR *attribute,
zcl_attribute_write_rec_t *rec)
{
int16_t bytes_read = 0;
// decode using standard method
if (rec)
{
// if this device is a MASTER, Time is read-only
if (zcl_time_timestatus & ZCL_TIME_STATUS_MASTER)
{
rec->status = ZCL_STATUS_READ_ONLY;
rec->buffer += 4;
return 4;
}
bytes_read = zcl_decode_attribute( &attribute->base, rec);
if (! (rec->flags & ZCL_ATTR_WRITE_FLAG_ASSIGN))
{
return bytes_read;
}
}
zcl_time_skew = zcl_time_time -
(xbee_seconds_timer() - ZCL_TIME_EPOCH_DELTA);
#ifdef ZCL_TIME_VERBOSE
printf( "%s: setting time to 0x%" PRIx32 "; skew is %" PRId32 " sec\n",
__FUNCTION__, zcl_time_time, zcl_time_skew);
#endif
return bytes_read;
}
/* START FUNCTION DESCRIPTION ********************************************
wpan_conversation_register <wpan_aps.c>
SYNTAX:
int wpan_conversation_register( wpan_ep_state_t FAR *state,
wpan_response_fn handler,
const void FAR *context, uint16_t timeout)
DESCRIPTION:
Add a conversation to the table of tracked conversations.
PARAMETER1: state - endpoint state associated with sending endpoint
PARAMETER2: handler - handler to call when responses come back,
or NULL to increment and return the
endpoint's transaction ID
PARAMETER3: context - pointer stored in conversation table and passed
to callback handler
PARAMETER4: timeout - number of seconds before generating timeout,
or 0 for none
RETURNS: 0-255 - transaction ID to use in sent frame
-EINVAL - state is invalid (NULL)
-ENOSPC - table is full
SEE ALSO: wpan_endpoint_next_trans
**************************************************************************/
wpan_aps_debug
int wpan_conversation_register( wpan_ep_state_t FAR *state,
wpan_response_fn handler, const void FAR *context, uint16_t timeout)
{
wpan_conversation_t FAR *conversation;
uint_fast8_t i;
if (! state)
{
return -EINVAL;
}
if (! handler)
{
// caller just wants the next transaction ID
return ++state->last_transaction;
}
conversation = state->conversations;
for (i = WPAN_MAX_CONVERSATIONS; i; ++conversation, --i)
{
if (conversation->handler == NULL)
{
// cast away the const -- allow const and non-const in conversation
conversation->context = (void FAR *)context;
conversation->handler = handler;
if (timeout != 0)
{
timeout += (uint16_t) xbee_seconds_timer();
if (timeout == 0)
{
// timeout of 0 is reserved for "never", so add an extra second
timeout = 1;
}
}
conversation->timeout = timeout;
return (conversation->transaction_id = ++state->last_transaction);
}
}
return -ENOSPC;
}
