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example/gatt_battery_query: clean up

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This commit is contained in:
Milanka Ringwald 2021-03-04 10:20:31 +01:00
parent 638e72d8dc
commit 83b6788cc1
1 changed files with 58 additions and 154 deletions
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212
example/gatt_battery_query.c
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@ -65,43 +65,25 @@ typedef struct advertising_report {
const uint8_t * data;
} advertising_report_t;
typedef enum {
TC_IDLE,
TC_W4_SCAN_RESULT,
TC_W4_CONNECT,
TC_W4_SERVICE_RESULT,
TC_W4_CHARACTERISTIC_RESULT,
TC_W4_BATTERY_DATA
} gc_state_t;
static enum {
APP_STATE_IDLE,
APP_STATE_W4_SCAN_RESULT,
APP_STATE_W4_CONNECT,
APP_STATE_CONNECTED
} app_state;
static int blacklist_index = 0;
static bd_addr_t blacklist[20];
static advertising_report_t report;
static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
static hci_con_handle_t connection_handle;
static uint16_t battery_service_cid;
static bd_addr_t cmdline_addr;
static int cmdline_addr_found = 0;
static hci_con_handle_t connection_handle;
static uint16_t battery_service_cid;
static gatt_client_characteristic_t battery_level_characteristic;
static gc_state_t state = TC_IDLE;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static gatt_client_notification_t notification_listener;
static int listener_registered;
static void printUUID(uint8_t * uuid128, uint16_t uuid16){
if (uuid16){
printf("%04x",uuid16);
} else {
printf("%s", uuid128_to_str(uuid128));
}
}
static int blacklist_size(void){
return sizeof(blacklist) / sizeof(bd_addr_t);
}
@ -120,35 +102,27 @@ static void add_to_blacklist(bd_addr_t addr){
blacklist_index = (blacklist_index + 1) % blacklist_size();
}
static void dump_advertising_report(advertising_report_t * e){
printf(" * adv. event: evt-type %u, addr-type %u, addr %s, rssi %u, length adv %u, data: ", e->event_type,
e->address_type, bd_addr_to_str(e->address), e->rssi, e->length);
printf_hexdump(e->data, e->length);
static void dump_advertising_report(uint8_t *packet){
bd_addr_t address;
gap_event_advertising_report_get_address(packet, address);
printf(" * adv. event: evt-type %u, addr-type %u, addr %s, rssi %u, length adv %u, data: ",
gap_event_advertising_report_get_advertising_event_type(packet),
gap_event_advertising_report_get_address_type(packet),
bd_addr_to_str(address),
gap_event_advertising_report_get_rssi(packet),
gap_event_advertising_report_get_data_length(packet));
printf_hexdump(gap_event_advertising_report_get_data(packet), gap_event_advertising_report_get_data_length(packet));
}
static void dump_characteristic_value(uint8_t * blob, uint16_t blob_length){
printf(" * characteristic value of length %d *** ", blob_length );
printf_hexdump(blob , blob_length);
printf("\n");
}
static void dump_characteristic(gatt_client_characteristic_t * characteristic){
printf(" * characteristic: [0x%04x-0x%04x-0x%04x], properties 0x%02x, uuid ",
characteristic->start_handle, characteristic->value_handle, characteristic->end_handle, characteristic->properties);
printUUID(characteristic->uuid128, characteristic->uuid16);
printf("\n");
}
static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(packet_type);
UNUSED(channel);
UNUSED(size);
int status;
uint8_t battery_level;
if (hci_event_packet_get_type(packet) != HCI_EVENT_GATTSERVICE_META){
return;
}
@ -168,150 +142,87 @@ static void handle_gatt_client_event(uint8_t packet_type, uint16_t channel, uint
break;
}
break;
default:
break;
}
switch(state){
case TC_W4_CHARACTERISTIC_RESULT:
switch(hci_event_packet_get_type(packet)){
case GATT_EVENT_CHARACTERISTIC_QUERY_RESULT:
gatt_event_characteristic_query_result_get_characteristic(packet, &battery_level_characteristic);
dump_characteristic(&battery_level_characteristic);
break;
case GATT_EVENT_QUERY_COMPLETE:
if (packet[4] != 0){
printf("CHARACTERISTIC_QUERY_RESULT - Error status %x.\n", packet[4]);
add_to_blacklist(report.address);
gap_disconnect(connection_handle);
break;
}
// register handler for notifications
listener_registered = 1;
gatt_client_listen_for_characteristic_value_updates(&notification_listener, handle_gatt_client_event, connection_handle, &battery_level_characteristic);
state = TC_W4_BATTERY_DATA;
printf("\nConfigure battery level characteristic for notify.\n");
status = gatt_client_write_client_characteristic_configuration(handle_gatt_client_event, connection_handle, &battery_level_characteristic, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION_NOTIFICATION);
if (status != 0){
printf("\nNotification not supported. Query value of characteristic.\n");
gatt_client_read_value_of_characteristic(handle_gatt_client_event, connection_handle, &battery_level_characteristic);
}
break;
default:
break;
}
break;
case TC_W4_BATTERY_DATA:
switch(hci_event_packet_get_type(packet)){
case GATT_EVENT_NOTIFICATION:
printf("\nBattery Data:\n");
dump_characteristic_value(&packet[8], little_endian_read_16(packet, 6));
break;
case GATT_EVENT_CHARACTERISTIC_VALUE_QUERY_RESULT:
if (gatt_event_characteristic_value_query_result_get_value_length(packet) < 1) break;
battery_level = gatt_event_characteristic_value_query_result_get_value(packet)[0];
printf("Battery level %d \n", battery_level);
break;
case GATT_EVENT_QUERY_COMPLETE:
if (packet[4] != 0){
printf("CHARACTERISTIC_VALUE_QUERY_RESULT - Error status %x.\n", packet[4]);
break;
}
break;
default:
printf("Unknown packet type %x\n", hci_event_packet_get_type(packet));
break;
}
case GATTSERVICE_SUBEVENT_BATTERY_SERVICE_LEVEL:
printf("Service index: %d, Battery level %d \n",
gattservice_subevent_battery_service_level_get_sevice_index(packet),
gattservice_subevent_battery_service_level_get_level(packet));
break;
default:
printf("error\n");
break;
}
}
static void fill_advertising_report_from_packet(advertising_report_t * adv_report, uint8_t *packet){
gap_event_advertising_report_get_address(packet, adv_report->address);
adv_report->event_type = gap_event_advertising_report_get_advertising_event_type(packet);
adv_report->address_type = gap_event_advertising_report_get_address_type(packet);
adv_report->rssi = gap_event_advertising_report_get_rssi(packet);
adv_report->length = gap_event_advertising_report_get_data_length(packet);
adv_report->data = gap_event_advertising_report_get_data(packet);
}
static void hci_event_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t status;
bd_addr_t address;
uint8_t event = hci_event_packet_get_type(packet);
switch (event) {
if (packet_type != HCI_EVENT_PACKET){
return;
}
switch (hci_event_packet_get_type(packet)) {
case BTSTACK_EVENT_STATE:
// BTstack activated, get started
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) break;
if (cmdline_addr_found){
printf("Connect to %s\n", bd_addr_to_str(cmdline_addr));
state = TC_W4_CONNECT;
app_state = APP_STATE_W4_CONNECT;
gap_connect(cmdline_addr, 0);
break;
}
printf("Start scanning!\n");
state = TC_W4_SCAN_RESULT;
app_state = APP_STATE_W4_SCAN_RESULT;
gap_set_scan_parameters(0,0x0030, 0x0030);
gap_start_scan();
break;
case GAP_EVENT_ADVERTISING_REPORT:
if (state != TC_W4_SCAN_RESULT) return;
fill_advertising_report_from_packet(&report, packet);
if (blacklist_contains(report.address)) {
if (app_state != APP_STATE_W4_SCAN_RESULT) return;
gap_event_advertising_report_get_address(packet, address);
if (blacklist_contains(address)) {
break;
}
dump_advertising_report(&report);
dump_advertising_report(packet);
// stop scanning, and connect to the device
state = TC_W4_CONNECT;
app_state = APP_STATE_W4_CONNECT;
gap_stop_scan();
printf("Stop scan. Connect to device with addr %s.\n", bd_addr_to_str(report.address));
gap_connect(report.address,report.address_type);
break;
case HCI_EVENT_LE_META:
// wait for connection complete
if (hci_event_le_meta_get_subevent_code(packet) != HCI_SUBEVENT_LE_CONNECTION_COMPLETE) break;
if (state != TC_W4_CONNECT) return;
if (app_state != APP_STATE_W4_CONNECT) return;
connection_handle = hci_subevent_le_connection_complete_get_connection_handle(packet);
// initialize gatt client context with handle, and add it to the list of active clients
// query primary services
printf("\nSearch for battery service.\n");
status = battery_service_client_connect(connection_handle, handle_gatt_client_event, &battery_service_cid);
if (status == ERROR_CODE_SUCCESS){
state = TC_W4_SERVICE_RESULT;
}
btstack_assert(status == ERROR_CODE_SUCCESS);
app_state = APP_STATE_CONNECTED;
printf("Battery service connected.\n");
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
// unregister listener
connection_handle = HCI_CON_HANDLE_INVALID;
if (listener_registered){
listener_registered = 0;
gatt_client_stop_listening_for_characteristic_value_updates(&notification_listener);
}
// Disconnect battery service
battery_service_client_disconnect(battery_service_cid);
if (cmdline_addr_found){
printf("\nDisconnected %s\n", bd_addr_to_str(cmdline_addr));
printf("Disconnected %s\n", bd_addr_to_str(cmdline_addr));
return;
}
printf("\nDisconnected %s\n", bd_addr_to_str(report.address));
printf("Disconnected %s\n", bd_addr_to_str(report.address));
printf("Restart scan.\n");
state = TC_W4_SCAN_RESULT;
app_state = APP_STATE_W4_SCAN_RESULT;
gap_start_scan();
break;
default:
@ -319,17 +230,10 @@ static void hci_event_handler(uint8_t packet_type, uint16_t channel, uint8_t *pa
}
}
#ifdef HAVE_BTSTACK_STDIN
static void usage(const char *name){
fprintf(stderr, "\nUsage: %s [-a|--address aa:bb:cc:dd:ee:ff]\n", name);
fprintf(stderr, "If no argument is provided, GATT browser will start scanning and connect to the first found device.\nTo connect to a specific device use argument [-a].\n\n");
}
#endif
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
#ifdef HAVE_BTSTACK_STDIN
// parse address if command line arguments are provided
int arg = 1;
cmdline_addr_found = 0;
@ -341,13 +245,12 @@ int btstack_main(int argc, const char * argv[]){
if (!cmdline_addr_found) exit(1);
continue;
}
usage(argv[0]);
fprintf(stderr, "\nUsage: %s [-a|--address aa:bb:cc:dd:ee:ff]\n", argv[0]);
fprintf(stderr, "If no argument is provided, GATT browser will start scanning and connect to the first found device.\nTo connect to a specific device use argument [-a].\n\n");
return 0;
}
#else
(void)argc;
(void)argv;
#endif
l2cap_init();
// setup ATT server - only needed if LE Peripheral does ATT queries on its own, e.g. Android phones
@ -363,6 +266,7 @@ int btstack_main(int argc, const char * argv[]){
hci_event_callback_registration.callback = &hci_event_handler;
hci_add_event_handler(&hci_event_callback_registration);
app_state = APP_STATE_IDLE;
// turn on!
hci_power_control(HCI_POWER_ON);