206 lines
7.4 KiB
C
206 lines
7.4 KiB
C
#define BTSTACK_FILE__ "bt_device.c"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "pico/cyw43_arch.h"
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#include "pico/btstack_cyw43.h"
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#include "pico/multicore.h"
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#include "btstack.h"
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#include "ble/gatt-service/battery_service_server.h"
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#include "ble/gatt-service/device_information_service_server.h"
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#include "ble/gatt-service/hids_device.h"
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#include "hid_report.h"
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#include "usb_device.h"
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#include "usb_host.h"
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#include "bt_device.h"
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#include "ble_hid.h"
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static btstack_packet_callback_registration_t hci_event_callback_registration;
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static btstack_packet_callback_registration_t l2cap_event_callback_registration;
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static btstack_packet_callback_registration_t sm_event_callback_registration;
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static uint8_t battery = 100;
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hci_con_handle_t con_handle = HCI_CON_HANDLE_INVALID;
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static uint8_t protocol_mode = 1;
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static hids_device_report_t *dev_report_storage;
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const uint8_t adv_data[] = {
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// Flags general discoverable, BR/EDR not supported
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0x02, BLUETOOTH_DATA_TYPE_FLAGS, 0x06,
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// Name
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0x0d, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'P', 'i', 'c', 'o', ' ', 'B', 'L', 'E', ' ', 'H','I','D',
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// 16-bit Service UUIDs
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0x03, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE & 0xff, ORG_BLUETOOTH_SERVICE_HUMAN_INTERFACE_DEVICE >> 8,
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// Appearance HID - Keyboard (Category 15, Sub-Category 1)
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0x03, BLUETOOTH_DATA_TYPE_APPEARANCE, 0xC1, 0x03,
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};
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const uint8_t adv_data_len = sizeof(adv_data);
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static void bt_hid_setup(void);
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static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size);
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//extern uint8_t desc_hid_report[];
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//extern uint16_t desc_hid_report_len;
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// start BTstack
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void btstack_main(void){
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bt_hid_setup();
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init_report_buf();
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hci_power_control(HCI_POWER_ON);
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}
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static void bt_hid_setup(void) {
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cyw43_arch_init();
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l2cap_init();
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// setup SM: Display only
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sm_init();
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sm_set_io_capabilities(IO_CAPABILITY_NO_INPUT_NO_OUTPUT);
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//sm_set_authentication_requirements(SM_AUTHREQ_SECURE_CONNECTION | SM_AUTHREQ_BONDING);
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sm_set_authentication_requirements(SM_AUTHREQ_BONDING);
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// setup ATT server
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att_server_init(profile_data, NULL, NULL);
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// setup battery service
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battery_service_server_init(battery);
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// setup device information service
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device_information_service_server_init();
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// setup HID Device service
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dev_report_storage = (hids_device_report_t *)malloc(sizeof(hids_device_report_t)*NUM_REPORT_IDS);
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hids_device_init_with_storage(0, get_desc_hid_report(), get_desc_hid_report_len(), NUM_REPORT_IDS, dev_report_storage);
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// setup advertisements
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uint16_t adv_int_min = 0x0030;
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uint16_t adv_int_max = 0x0030;
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uint8_t adv_type = 0;
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bd_addr_t null_addr;
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memset(null_addr, 0, 6);
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gap_advertisements_set_params(adv_int_min, adv_int_max, adv_type, 0, null_addr, 0x07, 0x00);
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gap_advertisements_set_data(adv_data_len, (uint8_t*) adv_data);
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gap_advertisements_enable(1);
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// register for HCI events
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hci_event_callback_registration.callback = &packet_handler;
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hci_add_event_handler(&hci_event_callback_registration);
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// register for connection parameter updates
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l2cap_event_callback_registration.callback = &packet_handler;
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l2cap_add_event_handler(&l2cap_event_callback_registration);
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// register for SM events
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sm_event_callback_registration.callback = &packet_handler;
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sm_add_event_handler(&sm_event_callback_registration);
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// register for HIDS
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hids_device_register_packet_handler(packet_handler);
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}
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// handler for BTStack packets
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static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
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(void) channel;
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(void) size;
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uint16_t conn_interval;
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if (packet_type != HCI_EVENT_PACKET) return;
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switch (hci_event_packet_get_type(packet)) {
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case HCI_EVENT_DISCONNECTION_COMPLETE:
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con_handle = HCI_CON_HANDLE_INVALID;
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printf("Disconnected\n");
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set_host_state(HOST_STOP_LISTEN);
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cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 0);
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break;
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case SM_EVENT_JUST_WORKS_REQUEST:
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printf("Just Works requested\n");
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sm_just_works_confirm(sm_event_just_works_request_get_handle(packet));
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cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 0);
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break;
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case SM_EVENT_NUMERIC_COMPARISON_REQUEST:
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printf("Confirming numeric comparison: %"PRIu32"\n", sm_event_numeric_comparison_request_get_passkey(packet));
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sm_numeric_comparison_confirm(sm_event_passkey_display_number_get_handle(packet));
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break;
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case SM_EVENT_PASSKEY_DISPLAY_NUMBER:
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printf("Display Passkey: %"PRIu32"\n", sm_event_passkey_display_number_get_passkey(packet));
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break;
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case L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_RESPONSE:
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printf("L2CAP Connection Parameter Update Complete, response: %x\n", l2cap_event_connection_parameter_update_response_get_result(packet));
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break;
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case HCI_EVENT_LE_META:
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switch (hci_event_le_meta_get_subevent_code(packet)) {
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case HCI_SUBEVENT_LE_CONNECTION_COMPLETE:
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// print connection parameters (without using float operations)
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conn_interval = hci_subevent_le_connection_complete_get_conn_interval(packet);
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printf("LE Connection Complete:\n");
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printf("- Connection Interval: %u.%02u ms\n", conn_interval * 125 / 100, 25 * (conn_interval & 3));
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printf("- Connection Latency: %u\n", hci_subevent_le_connection_complete_get_conn_latency(packet));
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break;
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case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE:
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// print connection parameters (without using float operations)
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conn_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet);
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printf("LE Connection Update:\n");
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printf("- Connection Interval: %u.%02u ms\n", conn_interval * 125 / 100, 25 * (conn_interval & 3));
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printf("- Connection Latency: %u\n", hci_subevent_le_connection_update_complete_get_conn_latency(packet));
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break;
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default:
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break;
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}
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break;
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case HCI_EVENT_HIDS_META:
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switch (hci_event_hids_meta_get_subevent_code(packet)){
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case HIDS_SUBEVENT_INPUT_REPORT_ENABLE:
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con_handle = hids_subevent_input_report_enable_get_con_handle(packet);
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printf("Report Characteristic Subscribed %u\n", hids_subevent_input_report_enable_get_enable(packet));
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set_host_state(HOST_START_LISTEN);
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cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
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// request connection param update via L2CAP following Apple Bluetooth Design Guidelines
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// gap_request_connection_parameter_update(con_handle, 12, 12, 4, 100); // 15 ms, 4, 1s
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// directly update connection params via HCI following Apple Bluetooth Design Guidelines
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// gap_update_connection_parameters(con_handle, 12, 12, 4, 100); // 60-75 ms, 4, 1s
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break;
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case HIDS_SUBEVENT_PROTOCOL_MODE:
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protocol_mode = hids_subevent_protocol_mode_get_protocol_mode(packet);
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printf("Protocol Mode: %s mode\n", hids_subevent_protocol_mode_get_protocol_mode(packet) ? "Report" : "Boot");
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break;
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case HIDS_SUBEVENT_CAN_SEND_NOW:
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printf("HIDS_SUBEVENT_CAN_SEND_NOW\n");
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send_report();
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cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1-cyw43_arch_gpio_get(CYW43_WL_GPIO_LED_PIN));
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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}
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// called to update the report map aka HID report descriptor on the BT interface
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void update_desc_hid_report(void) {
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hci_power_control(HCI_POWER_OFF);
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uint16_t len = get_desc_hid_report_len();
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if (len>0) {
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hids_device_init_with_storage(0, get_desc_hid_report(), len, NUM_REPORT_IDS, dev_report_storage);
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hci_power_control(HCI_POWER_ON);
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}
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}
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