84 lines
3.0 KiB
C++
84 lines
3.0 KiB
C++
#include <btstack.h>
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#include "advertising.hpp"
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#include <cstring>
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namespace cs::midi_ble_btstack {
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namespace {
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#ifdef CS_MIDI_HID_MOUSE
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uint8_t adv_data[] {
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// Flags general discoverable
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0x02, BLUETOOTH_DATA_TYPE_FLAGS, 0x06,
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// HID Service UUID (16-bit)
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0x03, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_16_BIT_SERVICE_CLASS_UUIDS,
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0x12, 0x18,
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// Appearance: Mouse (0x03C2)
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0x03, BLUETOOTH_DATA_TYPE_APPEARANCE, 0xC2, 0x03,
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// MIDI Service UUID (128-bit)
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0x11, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_128_BIT_SERVICE_CLASS_UUIDS,
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0x00, 0xc7, 0xc4, 0x4e, 0xe3, 0x6c, 0x51, 0xa7, 0x33, 0x4b, 0xe8, 0xed,
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0x5a, 0x0e, 0xb8, 0x03};
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#else
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uint8_t adv_data[] {
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// Flags general discoverable
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0x02, BLUETOOTH_DATA_TYPE_FLAGS, 0x06,
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// Connection interval range
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0x05, BLUETOOTH_DATA_TYPE_SLAVE_CONNECTION_INTERVAL_RANGE, 0x0c, 0x00, 0x0c,
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0x00,
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// MIDI Service UUID (128-bit)
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0x11, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_128_BIT_SERVICE_CLASS_UUIDS,
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0x00, 0xc7, 0xc4, 0x4e, 0xe3, 0x6c, 0x51, 0xa7, 0x33, 0x4b, 0xe8, 0xed,
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0x5a, 0x0e, 0xb8, 0x03};
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#endif
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static_assert(sizeof(adv_data) <= LE_ADVERTISING_DATA_SIZE);
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uint8_t adv_rsp_data[LE_ADVERTISING_DATA_SIZE] {
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// Name header
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0x15, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME,
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// Name value
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'C', 'o', 'n', 't', 'r', 'o', 'l', ' ', 'S', 'u', 'r', 'f', 'a', 'c', 'e',
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' ', 'M', 'I', 'D', 'I'};
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uint8_t adv_rsp_data_len() { return adv_rsp_data[0] + 1; }
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#ifdef CS_MIDI_HID_MOUSE
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void set_adv_connection_interval(uint16_t, uint16_t) {}
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#else
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void set_adv_connection_interval(uint16_t min_itvl, uint16_t max_itvl) {
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uint8_t *slave_itvl_range = adv_data + 5;
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slave_itvl_range[0] = (min_itvl >> 0) & 0xFF;
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slave_itvl_range[1] = (min_itvl >> 8) & 0xFF;
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slave_itvl_range[2] = (max_itvl >> 0) & 0xFF;
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slave_itvl_range[3] = (max_itvl >> 8) & 0xFF;
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}
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#endif
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void set_adv_name(const char *name) {
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auto len = std::min(std::strlen(name), sizeof(adv_rsp_data) - 2);
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uint8_t *adv_name_len = adv_rsp_data;
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uint8_t *adv_name = adv_rsp_data + 2;
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std::memcpy(adv_name, name, len);
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*adv_name_len = static_cast<uint8_t>(len + 1);
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}
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} // namespace
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void le_midi_setup_adv(const BLESettings &ble_settings) {
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set_adv_name(ble_settings.device_name);
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set_adv_connection_interval(ble_settings.connection_interval.minimum,
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ble_settings.connection_interval.maximum);
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uint16_t adv_int_min = 0x0020; // 20 ms (multiple of 0.625ms)
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uint16_t adv_int_max = 0x0040; // 40 ms (multiple of 0.625ms)
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uint8_t adv_type = 0;
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bd_addr_t null_addr {};
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uint8_t channel_map = 0x07; // All channels
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uint8_t filter_policy = 0x00; // Allow any
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gap_advertisements_set_params(adv_int_min, adv_int_max, adv_type, 0,
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null_addr, channel_map, filter_policy);
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gap_advertisements_set_data(sizeof(adv_data), adv_data);
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gap_scan_response_set_data(adv_rsp_data_len(), adv_rsp_data);
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gap_advertisements_enable(1);
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}
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} // namespace cs::midi_ble_btstack
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