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ble client: implement get characteristics for service

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This commit is contained in:
mila@ringwald.ch 2013-11-29 14:29:34 +00:00
parent f556090f1c
commit e562e8b5c2
2 changed files with 178 additions and 42 deletions
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203
example/libusb/ble_client.c
View File

@ -124,6 +124,22 @@ static void send_gatt_connection_complete_event(le_peripheral_t * peripheral, ui
(*le_central_callback)((le_central_event_t*)&event);
}
static le_command_status_t send_gatt_characteristic_request(le_peripheral_t *peripheral){
if (!l2cap_can_send_conectionless_packet_now()) return BLE_PERIPHERAL_BUSY;
uint8_t request[7];
request[0] = ATT_READ_BY_TYPE_REQUEST;
uint16_t att_client_end_handle = peripheral->end_group_handle;
uint16_t att_client_attribute_group_type = GATT_CHARACTERISTICS_UUID;
bt_store_16(request, 1, peripheral->last_group_handle+1);
bt_store_16(request, 3, att_client_end_handle);
bt_store_16(request, 5, att_client_attribute_group_type);
l2cap_send_connectionless(peripheral->handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, request, sizeof(request));
return BLE_PERIPHERAL_OK;
}
static le_command_status_t send_gatt_services_request(le_peripheral_t *peripheral){
if (!l2cap_can_send_conectionless_packet_now()) return BLE_PERIPHERAL_BUSY;
@ -131,14 +147,14 @@ static le_command_status_t send_gatt_services_request(le_peripheral_t *periphera
uint8_t request[7];
request[0] = ATT_READ_BY_GROUP_TYPE_REQUEST;
uint16_t att_client_end_handle = 0xffff;
uint16_t att_client_attribute_group_type = 0x2800;
uint16_t att_client_attribute_group_type = GATT_PRIMARY_SERVICE_UUID;
bt_store_16(request, 1, peripheral->last_group_handle+1);
bt_store_16(request, 3, att_client_end_handle);
bt_store_16(request, 5, att_client_attribute_group_type);
l2cap_send_connectionless(peripheral->handle, L2CAP_CID_ATTRIBUTE_PROTOCOL, request, sizeof(request));
printf("le_central_get_services sent\n");
return BLE_PERIPHERAL_OK;
}
@ -279,6 +295,12 @@ static void handle_peripheral_list(){
peripheral->state = P_W4_SERVICE_QUERY_RESULT;
break;
case P_W2_SEND_CHARACTERISTIC_QUERY:
status = send_gatt_characteristic_request(peripheral);
if (status != BLE_PERIPHERAL_OK) break;
peripheral->state = P_W4_CHARACTERISTIC_QUERY_RESULT;
break;
case P_W2_DISCONNECT:
peripheral->state = P_W4_DISCONNECTED;
hci_send_cmd(&hci_disconnect, peripheral->handle,0x13);
@ -372,10 +394,15 @@ le_command_status_t le_central_get_services(le_peripheral_t *peripheral){
return BLE_PERIPHERAL_OK;
}
le_command_status_t le_central_get_characteristics_for_service(le_peripheral_t *peripheral, le_service_t service){
le_command_status_t le_central_get_characteristics_for_service(le_peripheral_t *peripheral, le_service_t *service){
if (peripheral->state != P_CONNECTED) return BLE_PERIPHERAL_IN_WRONG_STATE;
printf("le_central_get_characteristics_for_service ready to send\n");
// TODO
// send will increment last_group_handle, so substract in advance
peripheral->last_group_handle = service->start_group_handle - 1;
peripheral->end_group_handle = service->end_group_handle;
peripheral->state = P_W2_SEND_CHARACTERISTIC_QUERY;
gatt_client_run();
return BLE_PERIPHERAL_OK;
}
@ -558,7 +585,6 @@ void printUUID128(const uint8_t * uuid){
static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){
if (packet_type != ATT_DATA_PACKET) return;
printf("att_packet_handler ...\n");
le_peripheral_t * peripheral = get_peripheral_for_handle(handle);
if (!peripheral) return;
@ -575,6 +601,7 @@ static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pa
break;
}
case ATT_READ_BY_GROUP_TYPE_RESPONSE:
// if (peripheral->state != P_W4_SERVICE_QUERY_RESULT) return;
{
printf("att_packet_handler :: ATT_READ_BY_GROUP_TYPE_RESPONSE\n");
@ -604,7 +631,7 @@ static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pa
}
}
if (peripheral->last_group_handle != 0xffff){
if (peripheral->last_group_handle < 0xffff){
peripheral->state = P_W2_SEND_SERVICE_QUERY;
break;
}
@ -617,20 +644,88 @@ static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pa
(*le_central_callback)((le_central_event_t*)&event);
break;
}
case ATT_ERROR_ATTRIBUTE_NOT_FOUND:
if (peripheral->state == P_W4_SERVICE_QUERY_RESULT){
// DONE
printf("att_packet_handler :: ATT_READ_BY_GROUP_TYPE_RESPONSE ---> DONE with error\n");
case ATT_READ_BY_TYPE_RESPONSE:
// if (peripheral->state != P_W4_CHARACTERISTIC_QUERY_RESULT) return;
/*
uint8_t permision;
uint16_t handle;
uint16_t uuid16;
uint8_t uuid128[16];
*/
{
uint8_t attr_length = packet[1];
uint8_t uuid_length = attr_length - 5;
peripheral->state = P_CONNECTED;
le_query_complete_event_t event;
event.type = GATT_SERVICE_QUERY_COMPLETE;
event.peripheral = peripheral;
int i;
for (i = 2; i < size; i += attr_length){
le_characteristic_event_t event;
le_characteristic_t characteristic;
event.type = GATT_CHARACTERISTIC_QUERY_RESULT;
peripheral->last_group_handle = READ_BT_16(packet,i);
characteristic.properties = packet[i+2];
characteristic.value_handle = READ_BT_16(packet, i+3);
if (uuid_length == 2){
memcpy((uint8_t*) &characteristic.uuid16, &packet[i+5], uuid_length);
sdp_normalize_uuid((uint8_t*) &characteristic.uuid128, characteristic.uuid16);
} else {
memcpy(characteristic.uuid128, &packet[i+5], uuid_length);
}
event.characteristic = characteristic;
(*le_central_callback)((le_central_event_t*)&event);
}
if (peripheral->last_group_handle < peripheral->end_group_handle){
peripheral->state = P_W2_SEND_CHARACTERISTIC_QUERY;
break;
}
printf("att_packet_handler :: ATT_READ_BY_TYPE_RESPONSE ---> DONE\n");
// DONE
peripheral->state = P_CONNECTED;
le_query_complete_event_t event;
event.type = GATT_CHARACTERISTIC_QUERY_COMPLETE;
event.peripheral = peripheral;
(*le_central_callback)((le_central_event_t*)&event);
break;
}
case ATT_ERROR_RESPONSE:
switch (packet[4]){
case ATT_ERROR_ATTRIBUTE_NOT_FOUND: {
le_query_complete_event_t event;
event.peripheral = peripheral;
event.type = 0;
switch(peripheral->state){
case P_W4_SERVICE_QUERY_RESULT:
event.type = GATT_SERVICE_QUERY_COMPLETE;
break;
case P_W4_CHARACTERISTIC_QUERY_RESULT:
event.type = GATT_CHARACTERISTIC_QUERY_COMPLETE;
break;
default:
return;
}
peripheral->state = P_CONNECTED;
if (event.type){
(*le_central_callback)((le_central_event_t*)&event);
}
break;
}
default:
att_client_report_error(packet, size);
break;
}
break;
default:
att_client_report_error(packet, size);
printf("ATT Handler, unhandled response type 0x%02x\n", packet[0]);
break;
}
gatt_client_run();
@ -718,6 +813,10 @@ static void dump_state(){
}
le_peripheral_t test_device;
le_service_t services[20];
int service_count = 0;
int service_index = 0;
static bd_addr_t test_device_addr = {0x1c, 0xba, 0x8c, 0x20, 0xc7, 0xf6};
typedef enum {
@ -726,7 +825,13 @@ typedef enum {
TC_SCAN_ACTIVE,
TC_W2_CONNECT,
TC_W4_CONNECT,
TC_CONNECTED,
TC_W2_SERVICE_REQUEST,
TC_W4_SERVICE_RESULT,
TC_W2_CHARACTERISTIC_REQUEST,
TC_W4_CHARACTERISTIC_RESULT,
TC_W2_DISCONNECT,
TC_W4_DISCONNECT,
TC_DISCONNECTED
@ -750,29 +855,32 @@ void test_client(){
break;
case TC_SCAN_ACTIVE:
// printf("test client - TC_SCAN_ACTIVE\n");
status = le_central_stop_scan();
// if (status != BLE_PERIPHERAL_OK) return;
le_central_stop_scan();
status = le_central_connect(&test_device, 0, test_device_addr);
// printf("test client - status after connect %u, result %u\n", test_device.state, status);
if (status != BLE_PERIPHERAL_OK) return;
tc_state = TC_W4_CONNECT;
// printf("test client - TC_W4_CONNECT\n");
break;
case TC_CONNECTED:
printf("test client - TC_CONNECTED, peripheral in state: ");
dump_peripheral_state(test_device.state);
case TC_W2_SERVICE_REQUEST:
status = le_central_get_services(&test_device);
if (status != BLE_PERIPHERAL_OK) return;
printf("le_central_get_services requested\n");
tc_state = TC_W4_SERVICE_RESULT;
break;
case TC_W2_CHARACTERISTIC_REQUEST:
printf("test client - TC_W2_CHARACTERISTIC_REQUEST, for service[%d/%d]\n", service_index, service_count-1);
status = le_central_get_characteristics_for_service(&test_device, &services[service_index++]);
if (status != BLE_PERIPHERAL_OK) return;
tc_state = TC_W4_CHARACTERISTIC_RESULT;
printf("le_central_get_characteristics_for_service requested\n");
break;
case TC_W2_DISCONNECT:
status = le_central_disconnect(&test_device);
if (status != BLE_PERIPHERAL_OK) return;
tc_state = TC_W4_DISCONNECT;
default:
break;
@ -782,8 +890,10 @@ void test_client(){
static void handle_le_central_event(le_central_event_t * event){
ad_event_t * advertisement_event;
le_peripheral_event_t * peripheral_event;
le_service_event_t * service_event;
le_query_complete_event_t * query_event;
le_service_t service;
le_characteristic_t characteristic;
switch (event->type){
case GATT_ADVERTISEMENT:
@ -802,7 +912,7 @@ static void handle_le_central_event(le_central_event_t * event){
peripheral_event = (le_peripheral_event_t *) event;
if (peripheral_event->status == 0){
// printf("handle_le_central_event::device is connected\n");
tc_state = TC_CONNECTED;
tc_state = TC_W2_SERVICE_REQUEST;
printf("test client - TC_CONNECTED\n");
test_client();
} else {
@ -813,18 +923,41 @@ static void handle_le_central_event(le_central_event_t * event){
break;
case GATT_SERVICE_QUERY_RESULT:
service_event = (le_service_event_t *) event;
service = ((le_service_event_t *) event)->service;
services[service_count++] = service;
test_client();
break;
printf(" *** service request *** start group handle %02x, end group handle %02x, uuid ", service_event->service.start_group_handle, service_event->service.end_group_handle);
printUUID128(service_event->service.uuid128);
case GATT_SERVICE_QUERY_COMPLETE:
query_event = (le_query_complete_event_t*) event;
tc_state = TC_W2_CHARACTERISTIC_REQUEST;
int i;
for (i = 0; i < service_count; i++){
printf(" *** found service *** start group handle %02x, end group handle %02x, uuid ", services[i].start_group_handle, services[i].end_group_handle);
printUUID128(services[i].uuid128);
printf("\n");
}
test_client();
break;
case GATT_CHARACTERISTIC_QUERY_RESULT:
characteristic = ((le_characteristic_event_t *) event)->characteristic;
printf(" *** found characteristic *** properties %x, handle %02x, uuid ", characteristic.properties, characteristic.value_handle);
printUUID128(characteristic.uuid128);
printf("\n");
test_client();
break;
case GATT_SERVICE_QUERY_COMPLETE:
query_event = (le_query_complete_event_t*) event;
printf("get services query complete for device %s\n", bd_addr_to_str(query_event->peripheral->address));
tc_state = TC_W2_DISCONNECT;
case GATT_CHARACTERISTIC_QUERY_COMPLETE:
query_event = (le_query_complete_event_t*) event;
if (service_index == service_count) {
tc_state = TC_W2_DISCONNECT;
break;
}
tc_state = TC_W2_CHARACTERISTIC_REQUEST;
test_client();
break;
default:
break;

17
example/libusb/ble_client.h
View File

@ -107,6 +107,7 @@ typedef struct le_peripheral{
// for service discovery
uint16_t last_group_handle;
uint16_t end_group_handle;
} le_peripheral_t;
typedef struct le_peripheral_event{
@ -133,14 +134,16 @@ typedef struct le_query_complete_event{
} le_query_complete_event_t;
typedef struct le_characteristic{
uint8_t permision;
uint16_t characteristic_handle;
uint8_t has_uuid128;
uint8_t properties;
uint16_t value_handle;
uint16_t uuid16;
uint8_t uuid128[16];
} le_characteristic_t;
typedef struct le_characteristic_event{
uint8_t type;
le_characteristic_t characteristic;
} le_characteristic_event_t;
void le_central_init();
void le_central_register_handler(void (*le_callback)(le_central_event_t * event));
@ -156,7 +159,7 @@ le_command_status_t le_central_disconnect(le_peripheral_t *context);
le_command_status_t le_central_get_services(le_peripheral_t *context);
// { type (8), le_peripheral_t *context, service_handle }
le_command_status_t le_central_get_characteristics_for_service(le_peripheral_t *context, le_service_t service);
le_command_status_t le_central_get_characteristics_for_service(le_peripheral_t *context, le_service_t *service);
// { type (8), le_peripheral_t *context, service_handle, le_characteristic *}
le_command_status_t le_central_read_value_of_characteristic(le_peripheral_t *context, uint16_t characteristic_handle);
@ -170,8 +173,8 @@ le_command_status_t le_central_unsubscribe_from_characteristic(le_peripheral_t *
// ADVANCED .. more convenience
le_command_status_t le_central_get_services_with_uuid16 (le_peripheral_t *context, uint16_t uuid16);
le_command_status_t le_central_get_services_with_uuid128(le_peripheral_t *context, uint8_t * uuid128);
le_command_status_t le_central_get_characteristics_for_service_with_uuid16 (le_peripheral_t *context, le_service_t service, uint16_t uuid16);
le_command_status_t le_central_get_characteristics_for_service_with_uuid128(le_peripheral_t *context, le_service_t service, uint8_t * uuid128);
le_command_status_t le_central_get_characteristics_for_service_with_uuid16 (le_peripheral_t *context, le_service_t *service, uint16_t uuid16);
le_command_status_t le_central_get_characteristics_for_service_with_uuid128(le_peripheral_t *context, le_service_t *service, uint8_t * uuid128);
#if defined __cplusplus