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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Dan Halbert for Adafruit Industries
* Copyright (c) 2018 Artur Pacholec
* Copyright (c) 2017 Glenn Ruben Bakke
*
* 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 <string.h>
#include "ble.h"
#include "ble_uart.h"
#include "ringbuffer.h"
#include "py/mphal.h"
#include "py/runtime.h"
#include "lib/utils/interrupt_char.h"
#include "shared-bindings/_bleio/Adapter.h"
#include "shared-bindings/_bleio/Characteristic.h"
#include "shared-bindings/_bleio/Device.h"
#include "shared-bindings/_bleio/Service.h"
#include "shared-bindings/_bleio/UUID.h"
#if CIRCUITPY_REPL_BLE
static const char default_name[] = "CP-REPL"; // max 8 chars or uuid won't fit in adv data
static const char NUS_UUID[] = "6e400001-b5a3-f393-e0a9-e50e24dcca9e";
#define NUS_RX_UUID 0x0002
#define NUS_TX_UUID 0x0003
#define BUFFER_SIZE 128
ringBuffer_typedef(uint8_t, ringbuffer_t);
static bleio_device_obj_t m_device;
static bleio_service_obj_t *m_nus;
static bleio_characteristic_obj_t *m_tx_chara;
static bleio_characteristic_obj_t *m_rx_chara;
static volatile bool m_cccd_enabled;
static uint8_t m_rx_ring_buffer_data[BUFFER_SIZE];
static ringbuffer_t m_rx_ring_buffer = {
.size = sizeof(m_rx_ring_buffer_data) + 1,
.elems = m_rx_ring_buffer_data,
};
STATIC void on_ble_evt(ble_evt_t *ble_evt, void *param) {
switch (ble_evt->header.evt_id) {
case BLE_GAP_EVT_DISCONNECTED: {
mp_obj_t device_obj = MP_OBJ_FROM_PTR(&m_device);
mp_call_function_0(mp_load_attr(device_obj, qstr_from_str("start_advertising")));
break;
}
case BLE_GATTS_EVT_WRITE: {
ble_gatts_evt_write_t *write = &ble_evt->evt.gatts_evt.params.write;
if (write->handle == m_tx_chara->cccd_handle) {
m_cccd_enabled = true;
} else if (write->handle == m_rx_chara->handle) {
for (size_t i = 0; i < write->len; ++i) {
#if MICROPY_KBD_EXCEPTION
if (write->data[i] == mp_interrupt_char) {
mp_keyboard_interrupt();
} else
#endif
{
bufferWrite(&m_rx_ring_buffer, write->data[i]);
}
}
}
}
}
}
void ble_uart_init(void) {
mp_obj_t device_obj = MP_OBJ_FROM_PTR(&m_device);
m_device.base.type = &bleio_device_type;
m_device.service_list = mp_obj_new_list(0, NULL);
m_device.notif_handler = mp_const_none;
m_device.conn_handler = mp_const_none;
m_device.conn_handle = 0xFFFF;
m_device.is_peripheral = true;
m_device.name = mp_obj_new_str(default_name, strlen(default_name), false);
common_hal_bleio_adapter_get_address(&m_device.address);
mp_obj_t nus_uuid_str = mp_obj_new_str(NUS_UUID, strlen(NUS_UUID), false);
mp_obj_t nus_uuid_obj = bleio_uuid_type.make_new(&bleio_uuid_type, 1, 0, &nus_uuid_str);
mp_obj_t nus_obj = bleio_service_type.make_new(&bleio_service_type, 1, 0, &nus_uuid_obj);
m_nus = MP_OBJ_TO_PTR(nus_obj);
mp_call_function_1(mp_load_attr(device_obj, qstr_from_str("add_service")), nus_obj);
mp_obj_t tx_uuid_int = mp_obj_new_int(NUS_TX_UUID);
mp_obj_t tx_uuid_obj = bleio_uuid_type.make_new(&bleio_uuid_type, 1, 0, &tx_uuid_int);
mp_obj_t tx_obj = bleio_characteristic_type.make_new(&bleio_characteristic_type, 1, 0, &tx_uuid_obj);
m_tx_chara = MP_OBJ_TO_PTR(tx_obj);
m_tx_chara->uuid->type = UUID_TYPE_128BIT;
m_tx_chara->uuid->uuid_vs_idx = m_nus->uuid->uuid_vs_idx;
m_tx_chara->props.notify = true;
mp_call_function_1(mp_load_attr(nus_obj, qstr_from_str("add_characteristic")), tx_obj);
mp_obj_t rx_uuid_int = mp_obj_new_int(NUS_RX_UUID);
mp_obj_t rx_uuid_obj = bleio_uuid_type.make_new(&bleio_uuid_type, 1, 0, &rx_uuid_int);
mp_obj_t rx_obj = bleio_characteristic_type.make_new(&bleio_characteristic_type, 1, 0, &rx_uuid_obj);
m_rx_chara = MP_OBJ_TO_PTR(rx_obj);
m_rx_chara->uuid->type = UUID_TYPE_128BIT;
m_rx_chara->uuid->uuid_vs_idx = m_nus->uuid->uuid_vs_idx;
m_rx_chara->props.write = true;
m_rx_chara->props.write_wo_resp = true;
mp_call_function_1(mp_load_attr(nus_obj, qstr_from_str("add_characteristic")), rx_obj);
mp_call_function_0(mp_load_attr(device_obj, qstr_from_str("start_advertising")));
ble_drv_add_event_handler(on_ble_evt, &m_device);
m_cccd_enabled = false;
while (!m_cccd_enabled) {
RUN_BACKGROUND_TASKS;
}
}
bool ble_uart_connected(void) {
return m_device.conn_handle != BLE_CONN_HANDLE_INVALID;
}
char ble_uart_rx_chr(void) {
while (isBufferEmpty(&m_rx_ring_buffer)) {
RUN_BACKGROUND_TASKS;
}
uint8_t byte;
bufferRead(&m_rx_ring_buffer, byte);
return (int)byte;
}
bool ble_uart_stdin_any(void) {
return !isBufferEmpty(&m_rx_ring_buffer);
}
void ble_uart_stdout_tx_str(const char *text) {
mp_hal_stdout_tx_strn(text, strlen(text));
}
int mp_hal_stdin_rx_chr(void) {
return ble_uart_rx_chr();
}
void mp_hal_stdout_tx_strn(const char *str, size_t len) {
size_t send_len;
while (len > 0) {
if (len >= BLE_GATT_ATT_MTU_DEFAULT - 3) {
send_len = (BLE_GATT_ATT_MTU_DEFAULT - 3);
} else {
send_len = len;
}
mp_buffer_info_t bufinfo = {
.buf = (uint8_t *)str,
.len = send_len,
};
common_hal_bleio_characteristic_write_value(m_tx_chara, &bufinfo);
len -= send_len;
str += send_len;
}
}
#endif // CIRCUITPY_REPL_BLE
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