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review spp counter example

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This commit is contained in:
Matthias Ringwald 2015-04-24 23:40:48 +02:00
parent f96bcf527f
commit b87cb105d6
1 changed files with 16 additions and 14 deletions
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30
example/embedded/spp_counter.c
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@ -76,19 +76,16 @@ static uint8_t spp_service_buffer[150];
/* @section SPP Service Setup /* @section SPP Service Setup
* *
* @text SPP is based on RFCOMM, a Bluetooth protocol that emulates RS-232 serial * @text To provide an SPP service, the L2CAP, RFCOMM, and SDP protocol layers
* ports. To access an RFCOMM serial port on a remote device, a client has to * are required. After setting up an RFCOMM service with channel nubmer
* query its Service Discovery Protocol (SDP) server. The SDP response for an SPP * RFCOMM_SERVER_CHANNEL, an SDP record is created and registered with the SDP server.
* service contains the RFCOMM channel number. To provide an SPP service, you need * Example code for SPP service setup is
* to initialize memory and the run loop, setup HCI and L2CAP, then register an * provided in Listing SPPSetup. The SDP record created by function
* RFCOMM service and provide its RFCOMM channel number as part of the Protocol * sdp_create_spp_service consists of a basic SPP definition that uses the provided
* List attribute of the SDP record. Example code for SPP service setup is
* provided in Listing SPPSetup. The SDP record created by
* $sdp_create_spp_service$ consists of a basic SPP definition that uses provided
* RFCOMM channel ID and service name. For more details, please have a look at it * RFCOMM channel ID and service name. For more details, please have a look at it
* in \path{include/btstack/sdp_util.c}. The SDP record is created on the fly in * in \path{src/sdp_util.c}.
* RAM and is deterministic. To preserve valuable RAM, the result can be stored as * The SDP record is created on the fly in RAM and is deterministic.
* constant data inside the ROM. * To preserve valuable RAM, the result cuold be stored as constant data inside the ROM.
*/ */
/* LISTING_START(SPPSetup): SPP service setup */ /* LISTING_START(SPPSetup): SPP service setup */
@ -103,23 +100,27 @@ void spp_service_setup(){
// init SDP, create record for SPP and register with SDP // init SDP, create record for SPP and register with SDP
sdp_init(); sdp_init();
memset(spp_service_buffer, 0, sizeof(spp_service_buffer)); memset(spp_service_buffer, 0, sizeof(spp_service_buffer));
/* LISTING_PAUSE */
#ifdef EMBEDDED #ifdef EMBEDDED
/* LISTING_RESUME */
service_record_item_t * service_record_item = (service_record_item_t *) spp_service_buffer; service_record_item_t * service_record_item = (service_record_item_t *) spp_service_buffer;
sdp_create_spp_service( (uint8_t*) &service_record_item->service_record, RFCOMM_SERVER_CHANNEL, "SPP Counter"); sdp_create_spp_service( (uint8_t*) &service_record_item->service_record, RFCOMM_SERVER_CHANNEL, "SPP Counter");
printf("SDP service buffer size: %u\n", (uint16_t) (sizeof(service_record_item_t) + de_get_len((uint8_t*) &service_record_item->service_record))); printf("SDP service buffer size: %u\n", (uint16_t) (sizeof(service_record_item_t) + de_get_len((uint8_t*) &service_record_item->service_record)));
sdp_register_service_internal(NULL, service_record_item); sdp_register_service_internal(NULL, service_record_item);
/* LISTING_PAUSE */
#else #else
sdp_create_spp_service( spp_service_buffer, RFCOMM_SERVER_CHANNEL, "SPP Counter"); sdp_create_spp_service( spp_service_buffer, RFCOMM_SERVER_CHANNEL, "SPP Counter");
printf("SDP service record size: %u\n", de_get_len(spp_service_buffer)); printf("SDP service record size: %u\n", de_get_len(spp_service_buffer));
sdp_register_service_internal(NULL, spp_service_buffer); sdp_register_service_internal(NULL, spp_service_buffer);
#endif #endif
/* LISTING_RESUME */
} }
/* LISTING_END */ /* LISTING_END */
/* @section Periodic Timer Setup /* @section Periodic Timer Setup
* *
* @text The heartbeat handler increases the real counter every second, * @text The heartbeat handler increases the real counter every second,
* as shown in Listing PeriodicCounter. * and sends a text string with the counter value, as shown in Listing PeriodicCounter.
*/ */
/* LISTING_START(PeriodicCounter): Periodic Counter */ /* LISTING_START(PeriodicCounter): Periodic Counter */
@ -157,7 +158,8 @@ static void one_shot_timer_setup(){
* packet handler, see Listing SppServerPacketHandler. In this example, * packet handler, see Listing SppServerPacketHandler. In this example,
* the following events are passed sequentially: * the following events are passed sequentially:
* - BTSTACK_EVENT_STATE, * - BTSTACK_EVENT_STATE,
* - HCI_EVENT_PIN_CODE_REQUEST or HCI_EVENT_USER_CONFIRMATION_REQUEST, * - HCI_EVENT_PIN_CODE_REQUEST (Standard pairing) or \\
* HCI_EVENT_USER_CONFIRMATION_REQUEST \\ (Secure Simple Pairing),
* - RFCOMM_EVENT_INCOMING_CONNECTION, * - RFCOMM_EVENT_INCOMING_CONNECTION,
* - RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE, and * - RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE, and
* - RFCOMM_EVENT_CHANNEL_CLOSED * - RFCOMM_EVENT_CHANNEL_CLOSED