/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include "shared-bindings/_bleio/__init__.h" #include "shared-bindings/_bleio/Adapter.h" #include "shared-bindings/_bleio/Characteristic.h" #include "shared-bindings/_bleio/CharacteristicBuffer.h" #include "shared-bindings/_bleio/PacketBuffer.h" #include "shared-bindings/_bleio/Service.h" #include "shared-bindings/_bleio/UUID.h" #include "shared-module/storage/__init__.h" #include "common-hal/_bleio/__init__.h" #include "py/mpstate.h" STATIC bleio_service_obj_t supervisor_ble_serial_service; STATIC bleio_uuid_obj_t supervisor_ble_serial_service_uuid; STATIC bleio_characteristic_obj_t supervisor_ble_rx_characteristic; STATIC bleio_uuid_obj_t supervisor_ble_rx_uuid; STATIC bleio_characteristic_obj_t supervisor_ble_tx_characteristic; STATIC bleio_uuid_obj_t supervisor_ble_tx_uuid; // This is the base UUID for the nordic uart service. const uint8_t nordic_uart_base_uuid[16] = {0x9e, 0xca, 0xdc, 0x24, 0x0e, 0xe5, 0xa9, 0xe0, 0x93, 0xf3, 0xa3, 0xb5, 0x00, 0x00, 0x40, 0x6e }; STATIC mp_obj_list_t characteristic_list; STATIC mp_obj_t characteristic_list_items[2]; STATIC uint32_t _outgoing1[BLE_GATTS_VAR_ATTR_LEN_MAX / 4]; STATIC uint32_t _outgoing2[BLE_GATTS_VAR_ATTR_LEN_MAX / 4]; STATIC ble_drv_evt_handler_entry_t rx_static_handler_entry; STATIC ble_drv_evt_handler_entry_t tx_static_handler_entry; STATIC bleio_packet_buffer_obj_t _tx_packet_buffer; STATIC uint32_t _incoming[64]; STATIC bleio_characteristic_buffer_obj_t _rx_buffer; void supervisor_start_bluetooth_serial(void) { supervisor_ble_serial_service_uuid.base.type = &bleio_uuid_type; common_hal_bleio_uuid_construct(&supervisor_ble_serial_service_uuid, 0x0001, nordic_uart_base_uuid); // We know we'll only be N characteristics so we can statically allocate it. characteristic_list.base.type = &mp_type_list; characteristic_list.alloc = sizeof(characteristic_list_items) / sizeof(characteristic_list_items[0]); characteristic_list.len = 0; characteristic_list.items = characteristic_list_items; mp_seq_clear(characteristic_list.items, 0, characteristic_list.alloc, sizeof(*characteristic_list.items)); _common_hal_bleio_service_construct(&supervisor_ble_serial_service, &supervisor_ble_serial_service_uuid, false /* is secondary */, &characteristic_list); // RX supervisor_ble_rx_uuid.base.type = &bleio_uuid_type; common_hal_bleio_uuid_construct(&supervisor_ble_rx_uuid, 0x0002, nordic_uart_base_uuid); common_hal_bleio_characteristic_construct(&supervisor_ble_rx_characteristic, &supervisor_ble_serial_service, 0, // handle (for remote only) &supervisor_ble_rx_uuid, CHAR_PROP_WRITE | CHAR_PROP_WRITE_NO_RESPONSE, SECURITY_MODE_NO_ACCESS, SECURITY_MODE_ENC_NO_MITM, BLE_GATTS_VAR_ATTR_LEN_MAX, // max length false, // fixed length NULL, // no initial value "CircuitPython Serial"); // TX supervisor_ble_tx_uuid.base.type = &bleio_uuid_type; common_hal_bleio_uuid_construct(&supervisor_ble_tx_uuid, 0x0003, nordic_uart_base_uuid); common_hal_bleio_characteristic_construct(&supervisor_ble_tx_characteristic, &supervisor_ble_serial_service, 0, // handle (for remote only) &supervisor_ble_tx_uuid, CHAR_PROP_NOTIFY, SECURITY_MODE_ENC_NO_MITM, SECURITY_MODE_NO_ACCESS, BLE_GATTS_VAR_ATTR_LEN_MAX, // max length false, // fixed length NULL, // no initial value "CircuitPython Serial"); // Use a PacketBuffer to transmit so that we glom characters to transmit // together and save BLE overhead. _common_hal_bleio_packet_buffer_construct( &_tx_packet_buffer, &supervisor_ble_tx_characteristic, NULL, 0, _outgoing1, _outgoing2, BLE_GATTS_VAR_ATTR_LEN_MAX, &tx_static_handler_entry); // Use a CharacteristicBuffer for rx so we can read a single character at a time. _common_hal_bleio_characteristic_buffer_construct(&_rx_buffer, &supervisor_ble_rx_characteristic, 0.1f, (uint8_t *)_incoming, sizeof(_incoming) * sizeof(uint32_t), &rx_static_handler_entry); } bool ble_serial_connected(void) { return _tx_packet_buffer.conn_handle != BLE_CONN_HANDLE_INVALID; } bool ble_serial_available(void) { return !common_hal_bleio_characteristic_buffer_deinited(&_rx_buffer) && common_hal_bleio_characteristic_buffer_rx_characters_available(&_rx_buffer); } char ble_serial_read_char(void) { if (common_hal_bleio_characteristic_buffer_deinited(&_rx_buffer)) { return -1; } uint8_t c; common_hal_bleio_characteristic_buffer_read(&_rx_buffer, &c, 1, NULL); return c; } void ble_serial_write(const char *text, size_t len) { if (common_hal_bleio_packet_buffer_deinited(&_tx_packet_buffer)) { return; } size_t sent = 0; while (sent < len) { uint16_t packet_size = MIN(len, (size_t)common_hal_bleio_packet_buffer_get_outgoing_packet_length(&_tx_packet_buffer)); mp_int_t written = common_hal_bleio_packet_buffer_write(&_tx_packet_buffer, (const uint8_t *)text + sent, packet_size, NULL, 0); // Error, so we drop characters to transmit. if (written < 0) { break; } sent += written; } }