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e152d0c197
micropython/extmod/modbluetooth.c
Jim Mussared e152d0c197 extmod/btstack: Schedule notify/indicate/write ops for bg completion. 
The goal of this commit is to allow using ble.gatts_notify() at any time,
even if the stack is not ready to send the notification right now.  It also
addresses the same issue for ble.gatts_indicate() and ble.gattc_write()
(without response).  In addition this commit fixes the case where the
buffer passed to write-with-response wasn't copied, meaning it could be
modified by the caller, affecting the in-progress write.

The changes are:

- gatts_notify/indicate will now run in the background if the ACL buffer is
  currently full, meaning that notify/indicate can be called at any time.

- gattc_write(mode=0) (no response) will now allow for one outstanding
  write.

- gattc_write(mode=1) (with response) will now copy the buffer so that it
  can't be modified by the caller while the write is in progress.

All four paths also now track the buffer while the operation is in
progress, which prevents the GC free'ing the buffer while it's still
needed.
2020-07-18 14:23:47 +10:00

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 Ayke van Laethem
* Copyright (c) 2019-2020 Jim Mussared
*
* 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 "py/binary.h"
#include "py/misc.h"
#include "py/mperrno.h"
#include "py/obj.h"
#include "py/objstr.h"
#include "py/objarray.h"
#include "py/qstr.h"
#include "py/runtime.h"
#include "py/mphal.h"
#include "extmod/modbluetooth.h"
#include <string.h>
#if MICROPY_PY_BLUETOOTH
#if !MICROPY_ENABLE_SCHEDULER
#error modbluetooth requires MICROPY_ENABLE_SCHEDULER
#endif
#define MP_BLUETOOTH_CONNECT_DEFAULT_SCAN_DURATION_MS 2000
#define MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_TUPLE_LEN 5
// This formula is intended to allow queuing the data of a large characteristic
// while still leaving room for a couple of normal (small, fixed size) events.
#define MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN(ringbuf_size) (MAX((int)((ringbuf_size) / 2), (int)(ringbuf_size) - 64))
STATIC const mp_obj_type_t bluetooth_ble_type;
STATIC const mp_obj_type_t bluetooth_uuid_type;
typedef struct {
mp_obj_base_t base;
mp_obj_t irq_handler;
bool irq_scheduled;
mp_obj_t irq_data_tuple;
uint8_t irq_data_addr_bytes[6];
uint16_t irq_data_data_alloc;
uint8_t *irq_data_data_bytes;
mp_obj_str_t irq_data_addr;
mp_obj_str_t irq_data_data;
mp_obj_bluetooth_uuid_t irq_data_uuid;
ringbuf_t ringbuf;
} mp_obj_bluetooth_ble_t;
// TODO: this seems like it could be generic?
STATIC mp_obj_t bluetooth_handle_errno(int err) {
if (err != 0) {
mp_raise_OSError(err);
}
return mp_const_none;
}
// ----------------------------------------------------------------------------
// UUID object
// ----------------------------------------------------------------------------
STATIC mp_obj_t bluetooth_uuid_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
(void)type;
mp_arg_check_num(n_args, n_kw, 1, 1, false);
mp_obj_bluetooth_uuid_t *self = m_new_obj(mp_obj_bluetooth_uuid_t);
self->base.type = &bluetooth_uuid_type;
if (mp_obj_is_int(all_args[0])) {
self->type = MP_BLUETOOTH_UUID_TYPE_16;
mp_int_t value = mp_obj_get_int(all_args[0]);
if (value > 65535) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid UUID"));
}
self->data[0] = value & 0xff;
self->data[1] = (value >> 8) & 0xff;
} else {
mp_buffer_info_t uuid_bufinfo = {0};
mp_get_buffer_raise(all_args[0], &uuid_bufinfo, MP_BUFFER_READ);
if (uuid_bufinfo.len == 2 || uuid_bufinfo.len == 4 || uuid_bufinfo.len == 16) {
// Bytes data -- infer UUID type from length and copy data.
self->type = uuid_bufinfo.len;
memcpy(self->data, uuid_bufinfo.buf, self->type);
} else {
// Assume UUID string (e.g. '6E400001-B5A3-F393-E0A9-E50E24DCCA9E')
self->type = MP_BLUETOOTH_UUID_TYPE_128;
int uuid_i = 32;
for (size_t i = 0; i < uuid_bufinfo.len; i++) {
char c = ((char *)uuid_bufinfo.buf)[i];
if (c == '-') {
continue;
}
if (!unichar_isxdigit(c)) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid char in UUID"));
}
c = unichar_xdigit_value(c);
uuid_i--;
if (uuid_i < 0) {
mp_raise_ValueError(MP_ERROR_TEXT("UUID too long"));
}
if (uuid_i % 2 == 0) {
// lower nibble
self->data[uuid_i / 2] |= c;
} else {
// upper nibble
self->data[uuid_i / 2] = c << 4;
}
}
if (uuid_i > 0) {
mp_raise_ValueError(MP_ERROR_TEXT("UUID too short"));
}
}
}
return MP_OBJ_FROM_PTR(self);
}
STATIC mp_obj_t bluetooth_uuid_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
mp_obj_bluetooth_uuid_t *self = MP_OBJ_TO_PTR(self_in);
switch (op) {
case MP_UNARY_OP_HASH: {
// Use the QSTR hash function.
return MP_OBJ_NEW_SMALL_INT(qstr_compute_hash(self->data, self->type));
}
default:
return MP_OBJ_NULL; // op not supported
}
}
STATIC mp_obj_t bluetooth_uuid_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
if (!mp_obj_is_type(rhs_in, &bluetooth_uuid_type)) {
return MP_OBJ_NULL;
}
mp_obj_bluetooth_uuid_t *lhs = MP_OBJ_TO_PTR(lhs_in);
mp_obj_bluetooth_uuid_t *rhs = MP_OBJ_TO_PTR(rhs_in);
switch (op) {
case MP_BINARY_OP_EQUAL:
case MP_BINARY_OP_LESS:
case MP_BINARY_OP_LESS_EQUAL:
case MP_BINARY_OP_MORE:
case MP_BINARY_OP_MORE_EQUAL:
if (lhs->type == rhs->type) {
return mp_obj_new_bool(mp_seq_cmp_bytes(op, lhs->data, lhs->type, rhs->data, rhs->type));
} else {
return mp_binary_op(op, MP_OBJ_NEW_SMALL_INT(lhs->type), MP_OBJ_NEW_SMALL_INT(rhs->type));
}
default:
return MP_OBJ_NULL; // op not supported
}
}
STATIC void bluetooth_uuid_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
(void)kind;
mp_obj_bluetooth_uuid_t *self = MP_OBJ_TO_PTR(self_in);
mp_printf(print, "UUID%u(%s", self->type * 8, self->type <= 4 ? "0x" : "'");
for (int i = 0; i < self->type; ++i) {
if (i == 4 || i == 6 || i == 8 || i == 10) {
mp_printf(print, "-");
}
mp_printf(print, "%02x", self->data[self->type - 1 - i]);
}
if (self->type == MP_BLUETOOTH_UUID_TYPE_128) {
mp_printf(print, "'");
}
mp_printf(print, ")");
}
STATIC mp_int_t bluetooth_uuid_get_buffer(mp_obj_t self_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
mp_obj_bluetooth_uuid_t *self = MP_OBJ_TO_PTR(self_in);
if (flags != MP_BUFFER_READ) {
return 1;
}
bufinfo->buf = self->data;
bufinfo->len = self->type;
bufinfo->typecode = 'B';
return 0;
}
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
STATIC void ringbuf_put_uuid(ringbuf_t *ringbuf, mp_obj_bluetooth_uuid_t *uuid) {
assert(ringbuf_free(ringbuf) >= (size_t)uuid->type + 1);
ringbuf_put(ringbuf, uuid->type);
for (int i = 0; i < uuid->type; ++i) {
ringbuf_put(ringbuf, uuid->data[i]);
}
}
STATIC void ringbuf_get_uuid(ringbuf_t *ringbuf, mp_obj_bluetooth_uuid_t *uuid) {
assert(ringbuf_avail(ringbuf) >= 1);
uuid->type = ringbuf_get(ringbuf);
assert(ringbuf_avail(ringbuf) >= uuid->type);
for (int i = 0; i < uuid->type; ++i) {
uuid->data[i] = ringbuf_get(ringbuf);
}
}
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
STATIC const mp_obj_type_t bluetooth_uuid_type = {
{ &mp_type_type },
.name = MP_QSTR_UUID,
.make_new = bluetooth_uuid_make_new,
.unary_op = bluetooth_uuid_unary_op,
.binary_op = bluetooth_uuid_binary_op,
.locals_dict = NULL,
.print = bluetooth_uuid_print,
.buffer_p = { .get_buffer = bluetooth_uuid_get_buffer },
};
// ----------------------------------------------------------------------------
// Bluetooth object: General
// ----------------------------------------------------------------------------
STATIC mp_obj_t bluetooth_ble_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
(void)type;
(void)n_args;
(void)n_kw;
(void)all_args;
if (MP_STATE_VM(bluetooth) == MP_OBJ_NULL) {
mp_obj_bluetooth_ble_t *o = m_new0(mp_obj_bluetooth_ble_t, 1);
o->base.type = &bluetooth_ble_type;
o->irq_handler = mp_const_none;
// Pre-allocate the event data tuple to prevent needing to allocate in the IRQ handler.
o->irq_data_tuple = mp_obj_new_tuple(MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_TUPLE_LEN, NULL);
// Pre-allocated buffers for address, payload and uuid.
o->irq_data_addr.base.type = &mp_type_bytes;
o->irq_data_addr.data = o->irq_data_addr_bytes;
o->irq_data_data_alloc = MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN(MICROPY_PY_BLUETOOTH_RINGBUF_SIZE);
o->irq_data_data.base.type = &mp_type_bytes;
o->irq_data_data.data = m_new(uint8_t, o->irq_data_data_alloc);
o->irq_data_uuid.base.type = &bluetooth_uuid_type;
// Allocate the default ringbuf.
ringbuf_alloc(&o->ringbuf, MICROPY_PY_BLUETOOTH_RINGBUF_SIZE);
MP_STATE_VM(bluetooth) = MP_OBJ_FROM_PTR(o);
}
return MP_STATE_VM(bluetooth);
}
STATIC mp_obj_t bluetooth_ble_active(size_t n_args, const mp_obj_t *args) {
if (n_args == 2) {
// Boolean enable/disable argument supplied, set current state.
if (mp_obj_is_true(args[1])) {
int err = mp_bluetooth_init();
bluetooth_handle_errno(err);
} else {
mp_bluetooth_deinit();
}
}
// Return current state.
return mp_obj_new_bool(mp_bluetooth_is_active());
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_active_obj, 1, 2, bluetooth_ble_active);
STATIC mp_obj_t bluetooth_ble_config(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
mp_obj_bluetooth_ble_t *self = MP_OBJ_TO_PTR(args[0]);
if (kwargs->used == 0) {
// Get config value
if (n_args != 2) {
mp_raise_TypeError(MP_ERROR_TEXT("must query one param"));
}
switch (mp_obj_str_get_qstr(args[1])) {
case MP_QSTR_gap_name: {
const uint8_t *buf;
size_t len = mp_bluetooth_gap_get_device_name(&buf);
return mp_obj_new_bytes(buf, len);
}
case MP_QSTR_mac: {
uint8_t addr[6];
mp_bluetooth_get_device_addr(addr);
return mp_obj_new_bytes(addr, MP_ARRAY_SIZE(addr));
}
case MP_QSTR_rxbuf:
return mp_obj_new_int(self->ringbuf.size);
default:
mp_raise_ValueError(MP_ERROR_TEXT("unknown config param"));
}
} else {
// Set config value(s)
if (n_args != 1) {
mp_raise_TypeError(MP_ERROR_TEXT("can't specify pos and kw args"));
}
for (size_t i = 0; i < kwargs->alloc; ++i) {
if (MP_MAP_SLOT_IS_FILLED(kwargs, i)) {
mp_map_elem_t *e = &kwargs->table[i];
switch (mp_obj_str_get_qstr(e->key)) {
case MP_QSTR_gap_name: {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(e->value, &bufinfo, MP_BUFFER_READ);
bluetooth_handle_errno(mp_bluetooth_gap_set_device_name(bufinfo.buf, bufinfo.len));
break;
}
case MP_QSTR_rxbuf: {
// Determine new buffer sizes
mp_int_t ringbuf_alloc = mp_obj_get_int(e->value);
if (ringbuf_alloc < 16 || ringbuf_alloc > 0xffff) {
mp_raise_ValueError(NULL);
}
size_t irq_data_alloc = MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN(ringbuf_alloc);
// Allocate new buffers
uint8_t *ringbuf = m_new(uint8_t, ringbuf_alloc);
uint8_t *irq_data = m_new(uint8_t, irq_data_alloc);
// Get old buffer sizes and pointers
uint8_t *old_ringbuf_buf = self->ringbuf.buf;
size_t old_ringbuf_alloc = self->ringbuf.size;
uint8_t *old_irq_data_buf = (uint8_t *)self->irq_data_data.data;
size_t old_irq_data_alloc = self->irq_data_data_alloc;
// Atomically update the ringbuf and irq data
MICROPY_PY_BLUETOOTH_ENTER
self->ringbuf.size = ringbuf_alloc;
self->ringbuf.buf = ringbuf;
self->ringbuf.iget = 0;
self->ringbuf.iput = 0;
self->irq_data_data_alloc = irq_data_alloc;
self->irq_data_data.data = irq_data;
MICROPY_PY_BLUETOOTH_EXIT
// Free old buffers
m_del(uint8_t, old_ringbuf_buf, old_ringbuf_alloc);
m_del(uint8_t, old_irq_data_buf, old_irq_data_alloc);
break;
}
default:
mp_raise_ValueError(MP_ERROR_TEXT("unknown config param"));
}
}
}
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bluetooth_ble_config_obj, 1, bluetooth_ble_config);
STATIC mp_obj_t bluetooth_ble_irq(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_handler };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_handler, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_rom_obj = MP_ROM_NONE} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
mp_obj_t callback = args[ARG_handler].u_obj;
if (callback != mp_const_none && !mp_obj_is_callable(callback)) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid callback"));
}
// Update the callback.
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
o->irq_handler = callback;
MICROPY_PY_BLUETOOTH_EXIT
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bluetooth_ble_irq_obj, 1, bluetooth_ble_irq);
// ----------------------------------------------------------------------------
// Bluetooth object: GAP
// ----------------------------------------------------------------------------
STATIC mp_obj_t bluetooth_ble_gap_advertise(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_interval_us, ARG_adv_data, ARG_resp_data, ARG_connectable };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_interval_us, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(500000)} },
{ MP_QSTR_adv_data, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
{ MP_QSTR_resp_data, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_rom_obj = MP_ROM_NONE} },
{ MP_QSTR_connectable, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_rom_obj = MP_ROM_TRUE} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
if (args[ARG_interval_us].u_obj == mp_const_none) {
mp_bluetooth_gap_advertise_stop();
return mp_const_none;
}
mp_int_t interval_us = mp_obj_get_int(args[ARG_interval_us].u_obj);
bool connectable = mp_obj_is_true(args[ARG_connectable].u_obj);
mp_buffer_info_t adv_bufinfo = {0};
if (args[ARG_adv_data].u_obj != mp_const_none) {
mp_get_buffer_raise(args[ARG_adv_data].u_obj, &adv_bufinfo, MP_BUFFER_READ);
}
mp_buffer_info_t resp_bufinfo = {0};
if (args[ARG_resp_data].u_obj != mp_const_none) {
mp_get_buffer_raise(args[ARG_resp_data].u_obj, &resp_bufinfo, MP_BUFFER_READ);
}
return bluetooth_handle_errno(mp_bluetooth_gap_advertise_start(connectable, interval_us, adv_bufinfo.buf, adv_bufinfo.len, resp_bufinfo.buf, resp_bufinfo.len));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bluetooth_ble_gap_advertise_obj, 1, bluetooth_ble_gap_advertise);
STATIC int bluetooth_gatts_register_service(mp_obj_t uuid_in, mp_obj_t characteristics_in, uint16_t **handles, size_t *num_handles) {
if (!mp_obj_is_type(uuid_in, &bluetooth_uuid_type)) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid service UUID"));
}
mp_obj_bluetooth_uuid_t *service_uuid = MP_OBJ_TO_PTR(uuid_in);
mp_obj_t len_in = mp_obj_len(characteristics_in);
size_t len = mp_obj_get_int(len_in);
mp_obj_iter_buf_t iter_buf;
mp_obj_t iterable = mp_getiter(characteristics_in, &iter_buf);
mp_obj_t characteristic_obj;
// Lists of characteristic uuids and flags.
mp_obj_bluetooth_uuid_t **characteristic_uuids = m_new(mp_obj_bluetooth_uuid_t *, len);
uint8_t *characteristic_flags = m_new(uint8_t, len);
// Flattened list of descriptor uuids and flags. Grows (realloc) as more descriptors are encountered.
mp_obj_bluetooth_uuid_t **descriptor_uuids = NULL;
uint8_t *descriptor_flags = NULL;
// How many descriptors in the flattened list per characteristic.
uint8_t *num_descriptors = m_new(uint8_t, len);
// Inititally allocate enough room for the number of characteristics.
// Will be grown to accommodate descriptors as necessary.
*num_handles = len;
*handles = m_new(uint16_t, *num_handles);
// Extract out characteristic uuids & flags.
int characteristic_index = 0; // characteristic index.
int handle_index = 0; // handle index.
int descriptor_index = 0; // descriptor index.
while ((characteristic_obj = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
// (uuid, flags, (optional descriptors),)
size_t characteristic_len;
mp_obj_t *characteristic_items;
mp_obj_get_array(characteristic_obj, &characteristic_len, &characteristic_items);
if (characteristic_len < 2 || characteristic_len > 3) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid characteristic tuple"));
}
mp_obj_t uuid_obj = characteristic_items[0];
if (!mp_obj_is_type(uuid_obj, &bluetooth_uuid_type)) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid characteristic UUID"));
}
(*handles)[handle_index++] = 0xffff;
// Optional third element, iterable of descriptors.
if (characteristic_len >= 3) {
mp_obj_t descriptors_len_in = mp_obj_len(characteristic_items[2]);
num_descriptors[characteristic_index] = mp_obj_get_int(descriptors_len_in);
if (num_descriptors[characteristic_index] == 0) {
continue;
}
// Grow the flattened uuids and flags arrays with this many more descriptors.
descriptor_uuids = m_renew(mp_obj_bluetooth_uuid_t *, descriptor_uuids, descriptor_index, descriptor_index + num_descriptors[characteristic_index]);
descriptor_flags = m_renew(uint8_t, descriptor_flags, descriptor_index, descriptor_index + num_descriptors[characteristic_index]);
// Also grow the handles array.
*handles = m_renew(uint16_t, *handles, *num_handles, *num_handles + num_descriptors[characteristic_index]);
mp_obj_iter_buf_t iter_buf_desc;
mp_obj_t iterable_desc = mp_getiter(characteristic_items[2], &iter_buf_desc);
mp_obj_t descriptor_obj;
// Extract out descriptors for this characteristic.
while ((descriptor_obj = mp_iternext(iterable_desc)) != MP_OBJ_STOP_ITERATION) {
// (uuid, flags,)
mp_obj_t *descriptor_items;
mp_obj_get_array_fixed_n(descriptor_obj, 2, &descriptor_items);
mp_obj_t desc_uuid_obj = descriptor_items[0];
if (!mp_obj_is_type(desc_uuid_obj, &bluetooth_uuid_type)) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid descriptor UUID"));
}
descriptor_uuids[descriptor_index] = MP_OBJ_TO_PTR(desc_uuid_obj);
descriptor_flags[descriptor_index] = mp_obj_get_int(descriptor_items[1]);
++descriptor_index;
(*handles)[handle_index++] = 0xffff;
}
// Reflect that we've grown the handles array.
*num_handles += num_descriptors[characteristic_index];
}
characteristic_uuids[characteristic_index] = MP_OBJ_TO_PTR(uuid_obj);
characteristic_flags[characteristic_index] = mp_obj_get_int(characteristic_items[1]);
++characteristic_index;
}
// Add service.
return mp_bluetooth_gatts_register_service(service_uuid, characteristic_uuids, characteristic_flags, descriptor_uuids, descriptor_flags, num_descriptors, *handles, len);
}
STATIC mp_obj_t bluetooth_ble_gatts_register_services(mp_obj_t self_in, mp_obj_t services_in) {
(void)self_in;
mp_obj_t len_in = mp_obj_len(services_in);
size_t len = mp_obj_get_int(len_in);
mp_obj_iter_buf_t iter_buf;
mp_obj_t iterable = mp_getiter(services_in, &iter_buf);
mp_obj_t service_tuple_obj;
mp_obj_tuple_t *result = MP_OBJ_TO_PTR(mp_obj_new_tuple(len, NULL));
uint16_t **handles = m_new0(uint16_t *, len);
size_t *num_handles = m_new0(size_t, len);
// TODO: Add a `append` kwarg (defaulting to False) to make this behavior optional.
bool append = false;
int err = mp_bluetooth_gatts_register_service_begin(append);
if (err != 0) {
return bluetooth_handle_errno(err);
}
size_t i = 0;
while ((service_tuple_obj = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
// (uuid, chars)
mp_obj_t *service_items;
mp_obj_get_array_fixed_n(service_tuple_obj, 2, &service_items);
err = bluetooth_gatts_register_service(service_items[0], service_items[1], &handles[i], &num_handles[i]);
if (err != 0) {
return bluetooth_handle_errno(err);
}
++i;
}
// On Nimble, this will actually perform the registration, making the handles valid.
err = mp_bluetooth_gatts_register_service_end();
if (err != 0) {
return bluetooth_handle_errno(err);
}
// Return tuple of tuple of value handles.
// TODO: Also the Generic Access service characteristics?
for (i = 0; i < len; ++i) {
mp_obj_tuple_t *service_handles = MP_OBJ_TO_PTR(mp_obj_new_tuple(num_handles[i], NULL));
for (size_t j = 0; j < num_handles[i]; ++j) {
service_handles->items[j] = MP_OBJ_NEW_SMALL_INT(handles[i][j]);
}
result->items[i] = MP_OBJ_FROM_PTR(service_handles);
}
return MP_OBJ_FROM_PTR(result);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(bluetooth_ble_gatts_register_services_obj, bluetooth_ble_gatts_register_services);
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
STATIC mp_obj_t bluetooth_ble_gap_connect(size_t n_args, const mp_obj_t *args) {
uint8_t addr_type = mp_obj_get_int(args[1]);
mp_buffer_info_t bufinfo = {0};
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_READ);
if (bufinfo.len != 6) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid addr"));
}
mp_int_t scan_duration_ms = MP_BLUETOOTH_CONNECT_DEFAULT_SCAN_DURATION_MS;
if (n_args == 4) {
scan_duration_ms = mp_obj_get_int(args[3]);
}
int err = mp_bluetooth_gap_peripheral_connect(addr_type, bufinfo.buf, scan_duration_ms);
return bluetooth_handle_errno(err);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gap_connect_obj, 3, 4, bluetooth_ble_gap_connect);
STATIC mp_obj_t bluetooth_ble_gap_scan(size_t n_args, const mp_obj_t *args) {
// Default is indefinite scan, with the NimBLE "background scan" interval and window.
mp_int_t duration_ms = 0;
mp_int_t interval_us = 1280000;
mp_int_t window_us = 11250;
if (n_args > 1) {
if (args[1] == mp_const_none) {
// scan(None) --> stop scan.
return bluetooth_handle_errno(mp_bluetooth_gap_scan_stop());
}
duration_ms = mp_obj_get_int(args[1]);
if (n_args > 2) {
interval_us = mp_obj_get_int(args[2]);
if (n_args > 3) {
window_us = mp_obj_get_int(args[3]);
}
}
}
return bluetooth_handle_errno(mp_bluetooth_gap_scan_start(duration_ms, interval_us, window_us));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gap_scan_obj, 1, 4, bluetooth_ble_gap_scan);
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
STATIC mp_obj_t bluetooth_ble_gap_disconnect(mp_obj_t self_in, mp_obj_t conn_handle_in) {
(void)self_in;
uint16_t conn_handle = mp_obj_get_int(conn_handle_in);
int err = mp_bluetooth_gap_disconnect(conn_handle);
if (err == 0) {
return mp_const_true;
} else if (err == MP_ENOTCONN) {
return mp_const_false;
} else {
return bluetooth_handle_errno(err);
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(bluetooth_ble_gap_disconnect_obj, bluetooth_ble_gap_disconnect);
// ----------------------------------------------------------------------------
// Bluetooth object: GATTS (Peripheral/Advertiser role)
// ----------------------------------------------------------------------------
STATIC mp_obj_t bluetooth_ble_gatts_read(mp_obj_t self_in, mp_obj_t value_handle_in) {
(void)self_in;
size_t len = 0;
uint8_t *buf;
mp_bluetooth_gatts_read(mp_obj_get_int(value_handle_in), &buf, &len);
return mp_obj_new_bytes(buf, len);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(bluetooth_ble_gatts_read_obj, bluetooth_ble_gatts_read);
STATIC mp_obj_t bluetooth_ble_gatts_write(mp_obj_t self_in, mp_obj_t value_handle_in, mp_obj_t data) {
(void)self_in;
mp_buffer_info_t bufinfo = {0};
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
int err = mp_bluetooth_gatts_write(mp_obj_get_int(value_handle_in), bufinfo.buf, bufinfo.len);
bluetooth_handle_errno(err);
return MP_OBJ_NEW_SMALL_INT(bufinfo.len);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(bluetooth_ble_gatts_write_obj, bluetooth_ble_gatts_write);
STATIC mp_obj_t bluetooth_ble_gatts_notify(size_t n_args, const mp_obj_t *args) {
mp_int_t conn_handle = mp_obj_get_int(args[1]);
mp_int_t value_handle = mp_obj_get_int(args[2]);
if (n_args == 4) {
mp_buffer_info_t bufinfo = {0};
mp_get_buffer_raise(args[3], &bufinfo, MP_BUFFER_READ);
int err = mp_bluetooth_gatts_notify_send(conn_handle, value_handle, bufinfo.buf, bufinfo.len);
bluetooth_handle_errno(err);
return mp_const_none;
} else {
int err = mp_bluetooth_gatts_notify(conn_handle, value_handle);
return bluetooth_handle_errno(err);
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gatts_notify_obj, 3, 4, bluetooth_ble_gatts_notify);
STATIC mp_obj_t bluetooth_ble_gatts_indicate(mp_obj_t self_in, mp_obj_t conn_handle_in, mp_obj_t value_handle_in) {
mp_int_t conn_handle = mp_obj_get_int(conn_handle_in);
mp_int_t value_handle = mp_obj_get_int(value_handle_in);
int err = mp_bluetooth_gatts_indicate(conn_handle, value_handle);
return bluetooth_handle_errno(err);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(bluetooth_ble_gatts_indicate_obj, bluetooth_ble_gatts_indicate);
STATIC mp_obj_t bluetooth_ble_gatts_set_buffer(size_t n_args, const mp_obj_t *args) {
mp_int_t value_handle = mp_obj_get_int(args[1]);
mp_int_t len = mp_obj_get_int(args[2]);
bool append = n_args >= 4 && mp_obj_is_true(args[3]);
return bluetooth_handle_errno(mp_bluetooth_gatts_set_buffer(value_handle, len, append));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gatts_set_buffer_obj, 3, 4, bluetooth_ble_gatts_set_buffer);
// ----------------------------------------------------------------------------
// Bluetooth object: GATTC (Central/Scanner role)
// ----------------------------------------------------------------------------
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
STATIC mp_obj_t bluetooth_ble_gattc_discover_services(size_t n_args, const mp_obj_t *args) {
mp_int_t conn_handle = mp_obj_get_int(args[1]);
mp_obj_bluetooth_uuid_t *uuid = NULL;
if (n_args == 3) {
uuid = MP_OBJ_TO_PTR(args[2]);
}
return bluetooth_handle_errno(mp_bluetooth_gattc_discover_primary_services(conn_handle, uuid));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gattc_discover_services_obj, 2, 3, bluetooth_ble_gattc_discover_services);
STATIC mp_obj_t bluetooth_ble_gattc_discover_characteristics(size_t n_args, const mp_obj_t *args) {
mp_int_t conn_handle = mp_obj_get_int(args[1]);
mp_int_t start_handle = mp_obj_get_int(args[2]);
mp_int_t end_handle = mp_obj_get_int(args[3]);
mp_obj_bluetooth_uuid_t *uuid = NULL;
if (n_args == 3) {
uuid = MP_OBJ_TO_PTR(args[4]);
}
return bluetooth_handle_errno(mp_bluetooth_gattc_discover_characteristics(conn_handle, start_handle, end_handle, uuid));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gattc_discover_characteristics_obj, 4, 5, bluetooth_ble_gattc_discover_characteristics);
STATIC mp_obj_t bluetooth_ble_gattc_discover_descriptors(size_t n_args, const mp_obj_t *args) {
(void)n_args;
mp_int_t conn_handle = mp_obj_get_int(args[1]);
mp_int_t start_handle = mp_obj_get_int(args[2]);
mp_int_t end_handle = mp_obj_get_int(args[3]);
return bluetooth_handle_errno(mp_bluetooth_gattc_discover_descriptors(conn_handle, start_handle, end_handle));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gattc_discover_descriptors_obj, 4, 4, bluetooth_ble_gattc_discover_descriptors);
STATIC mp_obj_t bluetooth_ble_gattc_read(mp_obj_t self_in, mp_obj_t conn_handle_in, mp_obj_t value_handle_in) {
(void)self_in;
mp_int_t conn_handle = mp_obj_get_int(conn_handle_in);
mp_int_t value_handle = mp_obj_get_int(value_handle_in);
return bluetooth_handle_errno(mp_bluetooth_gattc_read(conn_handle, value_handle));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(bluetooth_ble_gattc_read_obj, bluetooth_ble_gattc_read);
STATIC mp_obj_t bluetooth_ble_gattc_write(size_t n_args, const mp_obj_t *args) {
mp_int_t conn_handle = mp_obj_get_int(args[1]);
mp_int_t value_handle = mp_obj_get_int(args[2]);
mp_obj_t data = args[3];
mp_buffer_info_t bufinfo = {0};
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
size_t len = bufinfo.len;
unsigned int mode = MP_BLUETOOTH_WRITE_MODE_NO_RESPONSE;
if (n_args == 5) {
mode = mp_obj_get_int(args[4]);
}
return bluetooth_handle_errno(mp_bluetooth_gattc_write(conn_handle, value_handle, bufinfo.buf, &len, mode));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bluetooth_ble_gattc_write_obj, 4, 5, bluetooth_ble_gattc_write);
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
// ----------------------------------------------------------------------------
// Bluetooth object: Definition
// ----------------------------------------------------------------------------
STATIC const mp_rom_map_elem_t bluetooth_ble_locals_dict_table[] = {
// General
{ MP_ROM_QSTR(MP_QSTR_active), MP_ROM_PTR(&bluetooth_ble_active_obj) },
{ MP_ROM_QSTR(MP_QSTR_config), MP_ROM_PTR(&bluetooth_ble_config_obj) },
{ MP_ROM_QSTR(MP_QSTR_irq), MP_ROM_PTR(&bluetooth_ble_irq_obj) },
// GAP
{ MP_ROM_QSTR(MP_QSTR_gap_advertise), MP_ROM_PTR(&bluetooth_ble_gap_advertise_obj) },
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
{ MP_ROM_QSTR(MP_QSTR_gap_connect), MP_ROM_PTR(&bluetooth_ble_gap_connect_obj) },
{ MP_ROM_QSTR(MP_QSTR_gap_scan), MP_ROM_PTR(&bluetooth_ble_gap_scan_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_gap_disconnect), MP_ROM_PTR(&bluetooth_ble_gap_disconnect_obj) },
// GATT Server (i.e. peripheral/advertiser role)
{ MP_ROM_QSTR(MP_QSTR_gatts_register_services), MP_ROM_PTR(&bluetooth_ble_gatts_register_services_obj) },
{ MP_ROM_QSTR(MP_QSTR_gatts_read), MP_ROM_PTR(&bluetooth_ble_gatts_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_gatts_write), MP_ROM_PTR(&bluetooth_ble_gatts_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_gatts_notify), MP_ROM_PTR(&bluetooth_ble_gatts_notify_obj) },
{ MP_ROM_QSTR(MP_QSTR_gatts_indicate), MP_ROM_PTR(&bluetooth_ble_gatts_indicate_obj) },
{ MP_ROM_QSTR(MP_QSTR_gatts_set_buffer), MP_ROM_PTR(&bluetooth_ble_gatts_set_buffer_obj) },
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
// GATT Client (i.e. central/scanner role)
{ MP_ROM_QSTR(MP_QSTR_gattc_discover_services), MP_ROM_PTR(&bluetooth_ble_gattc_discover_services_obj) },
{ MP_ROM_QSTR(MP_QSTR_gattc_discover_characteristics), MP_ROM_PTR(&bluetooth_ble_gattc_discover_characteristics_obj) },
{ MP_ROM_QSTR(MP_QSTR_gattc_discover_descriptors), MP_ROM_PTR(&bluetooth_ble_gattc_discover_descriptors_obj) },
{ MP_ROM_QSTR(MP_QSTR_gattc_read), MP_ROM_PTR(&bluetooth_ble_gattc_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_gattc_write), MP_ROM_PTR(&bluetooth_ble_gattc_write_obj) },
#endif
};
STATIC MP_DEFINE_CONST_DICT(bluetooth_ble_locals_dict, bluetooth_ble_locals_dict_table);
STATIC const mp_obj_type_t bluetooth_ble_type = {
{ &mp_type_type },
.name = MP_QSTR_BLE,
.make_new = bluetooth_ble_make_new,
.locals_dict = (void *)&bluetooth_ble_locals_dict,
};
STATIC const mp_rom_map_elem_t mp_module_bluetooth_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ubluetooth) },
{ MP_ROM_QSTR(MP_QSTR_BLE), MP_ROM_PTR(&bluetooth_ble_type) },
{ MP_ROM_QSTR(MP_QSTR_UUID), MP_ROM_PTR(&bluetooth_uuid_type) },
{ MP_ROM_QSTR(MP_QSTR_FLAG_READ), MP_ROM_INT(MP_BLUETOOTH_CHARACTERISTIC_FLAG_READ) },
{ MP_ROM_QSTR(MP_QSTR_FLAG_WRITE), MP_ROM_INT(MP_BLUETOOTH_CHARACTERISTIC_FLAG_WRITE) },
{ MP_ROM_QSTR(MP_QSTR_FLAG_NOTIFY), MP_ROM_INT(MP_BLUETOOTH_CHARACTERISTIC_FLAG_NOTIFY) },
{ MP_ROM_QSTR(MP_QSTR_FLAG_WRITE_NO_RESPONSE), MP_ROM_INT(MP_BLUETOOTH_CHARACTERISTIC_FLAG_WRITE_NO_RESPONSE) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_bluetooth_globals, mp_module_bluetooth_globals_table);
const mp_obj_module_t mp_module_ubluetooth = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&mp_module_bluetooth_globals,
};
// Helpers
#include <stdio.h>
STATIC void ringbuf_extract(ringbuf_t *ringbuf, mp_obj_tuple_t *data_tuple, size_t n_u16, size_t n_u8, mp_obj_str_t *bytes_addr, size_t n_i8, mp_obj_bluetooth_uuid_t *uuid, mp_obj_str_t *bytes_data) {
assert(ringbuf_avail(ringbuf) >= n_u16 * 2 + n_u8 + (bytes_addr ? 6 : 0) + n_i8 + (uuid ? 1 : 0) + (bytes_data ? 1 : 0));
size_t j = 0;
for (size_t i = 0; i < n_u16; ++i) {
data_tuple->items[j++] = MP_OBJ_NEW_SMALL_INT(ringbuf_get16(ringbuf));
}
if (n_u8) {
data_tuple->items[j++] = MP_OBJ_NEW_SMALL_INT(ringbuf_get(ringbuf));
}
if (bytes_addr) {
bytes_addr->len = 6;
for (size_t i = 0; i < bytes_addr->len; ++i) {
// cast away const, this is actually bt->irq_addr_bytes.
((uint8_t *)bytes_addr->data)[i] = ringbuf_get(ringbuf);
}
data_tuple->items[j++] = MP_OBJ_FROM_PTR(bytes_addr);
}
for (size_t i = 0; i < n_i8; ++i) {
// Note the int8_t got packed into the ringbuf as a uint8_t.
data_tuple->items[j++] = MP_OBJ_NEW_SMALL_INT((int8_t)ringbuf_get(ringbuf));
}
if (uuid) {
ringbuf_get_uuid(ringbuf, uuid);
data_tuple->items[j++] = MP_OBJ_FROM_PTR(uuid);
}
// The code that enqueues into the ringbuf should ensure that it doesn't
// put more than bt->irq_data_data_alloc bytes into the ringbuf, because
// that's what's available here in bt->irq_data_bytes.
if (bytes_data) {
bytes_data->len = ringbuf_get16(ringbuf);
for (size_t i = 0; i < bytes_data->len; ++i) {
// cast away const, this is actually bt->irq_data_bytes.
((uint8_t *)bytes_data->data)[i] = ringbuf_get(ringbuf);
}
data_tuple->items[j++] = MP_OBJ_FROM_PTR(bytes_data);
}
data_tuple->len = j;
}
STATIC mp_obj_t bluetooth_ble_invoke_irq(mp_obj_t none_in) {
(void)none_in;
// This is always executing in schedule context.
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
o->irq_scheduled = false;
for (;;) {
MICROPY_PY_BLUETOOTH_ENTER
mp_int_t event = ringbuf_get(&o->ringbuf);
if (event < 0) {
// Nothing available in ringbuf.
MICROPY_PY_BLUETOOTH_EXIT
break;
}
// Although we're in schedule context, this code still avoids using any allocations:
// - IRQs are disabled (to protect the ringbuf), and we need to avoid triggering GC
// - The user's handler might not alloc, so we shouldn't either.
mp_obj_t handler = handler = o->irq_handler;
mp_obj_tuple_t *data_tuple = MP_OBJ_TO_PTR(o->irq_data_tuple);
if (event == MP_BLUETOOTH_IRQ_CENTRAL_CONNECT || event == MP_BLUETOOTH_IRQ_PERIPHERAL_CONNECT || event == MP_BLUETOOTH_IRQ_CENTRAL_DISCONNECT || event == MP_BLUETOOTH_IRQ_PERIPHERAL_DISCONNECT) {
// conn_handle, addr_type, addr
ringbuf_extract(&o->ringbuf, data_tuple, 1, 1, &o->irq_data_addr, 0, NULL, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTS_WRITE) {
// conn_handle, value_handle
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, NULL, NULL);
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
} else if (event == MP_BLUETOOTH_IRQ_SCAN_RESULT) {
// addr_type, addr, adv_type, rssi, adv_data
ringbuf_extract(&o->ringbuf, data_tuple, 0, 1, &o->irq_data_addr, 2, NULL, &o->irq_data_data);
} else if (event == MP_BLUETOOTH_IRQ_SCAN_DONE) {
// No params required.
data_tuple->len = 0;
} else if (event == MP_BLUETOOTH_IRQ_GATTC_SERVICE_RESULT) {
// conn_handle, start_handle, end_handle, uuid
ringbuf_extract(&o->ringbuf, data_tuple, 3, 0, NULL, 0, &o->irq_data_uuid, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_CHARACTERISTIC_RESULT) {
// conn_handle, def_handle, value_handle, properties, uuid
ringbuf_extract(&o->ringbuf, data_tuple, 3, 1, NULL, 0, &o->irq_data_uuid, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_DESCRIPTOR_RESULT) {
// conn_handle, handle, uuid
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, &o->irq_data_uuid, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_SERVICE_DONE || event == MP_BLUETOOTH_IRQ_GATTC_CHARACTERISTIC_DONE || event == MP_BLUETOOTH_IRQ_GATTC_DESCRIPTOR_DONE) {
// conn_handle, status
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, NULL, NULL);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_READ_RESULT || event == MP_BLUETOOTH_IRQ_GATTC_NOTIFY || event == MP_BLUETOOTH_IRQ_GATTC_INDICATE) {
// conn_handle, value_handle, data
ringbuf_extract(&o->ringbuf, data_tuple, 2, 0, NULL, 0, NULL, &o->irq_data_data);
} else if (event == MP_BLUETOOTH_IRQ_GATTC_READ_DONE || event == MP_BLUETOOTH_IRQ_GATTC_WRITE_DONE) {
// conn_handle, value_handle, status
ringbuf_extract(&o->ringbuf, data_tuple, 3, 0, NULL, 0, NULL, NULL);
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
}
MICROPY_PY_BLUETOOTH_EXIT
mp_call_function_2(handler, MP_OBJ_NEW_SMALL_INT(event), MP_OBJ_FROM_PTR(data_tuple));
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(bluetooth_ble_invoke_irq_obj, bluetooth_ble_invoke_irq);
// ----------------------------------------------------------------------------
// Port API
// ----------------------------------------------------------------------------
// Callbacks are called in interrupt context (i.e. can't allocate), so we need to push the data
// into the ringbuf and schedule the callback via mp_sched_schedule.
STATIC bool enqueue_irq(mp_obj_bluetooth_ble_t *o, size_t len, uint8_t event) {
if (!o || o->irq_handler == mp_const_none) {
return false;
}
// Check if there is enough room for <event-type><payload>.
if (ringbuf_free(&o->ringbuf) < len + 1) {
// Ringbuffer doesn't have room (and is therefore non-empty).
// If this is another scan result, or the front of the ringbuffer isn't a scan result, then nothing to do.
if (event == MP_BLUETOOTH_IRQ_SCAN_RESULT || ringbuf_peek(&o->ringbuf) != MP_BLUETOOTH_IRQ_SCAN_RESULT) {
return false;
}
// Front of the queue is a scan result, remove it.
// event, addr_type, addr, adv_type, rssi
int n = 1 + 1 + 6 + 1 + 1;
for (int i = 0; i < n; ++i) {
ringbuf_get(&o->ringbuf);
}
// adv_data
n = ringbuf_get(&o->ringbuf);
for (int i = 0; i < n; ++i) {
ringbuf_get(&o->ringbuf);
}
}
// Append this event, the caller will then append the arguments.
ringbuf_put(&o->ringbuf, event);
return true;
}
// Must hold the atomic section before calling this (MICROPY_PY_BLUETOOTH_ENTER).
STATIC void schedule_ringbuf(mp_uint_t atomic_state) {
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (!o->irq_scheduled) {
o->irq_scheduled = true;
MICROPY_PY_BLUETOOTH_EXIT
mp_sched_schedule(MP_OBJ_FROM_PTR(&bluetooth_ble_invoke_irq_obj), mp_const_none);
} else {
MICROPY_PY_BLUETOOTH_EXIT
}
}
void mp_bluetooth_gap_on_connected_disconnected(uint8_t event, uint16_t conn_handle, uint8_t addr_type, const uint8_t *addr) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 1 + 6, event)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put(&o->ringbuf, addr_type);
for (int i = 0; i < 6; ++i) {
ringbuf_put(&o->ringbuf, addr[i]);
}
}
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gatts_on_write(uint16_t conn_handle, uint16_t value_handle) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 2, MP_BLUETOOTH_IRQ_GATTS_WRITE)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, value_handle);
}
schedule_ringbuf(atomic_state);
}
#if MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
void mp_bluetooth_gap_on_scan_complete(void) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 0, MP_BLUETOOTH_IRQ_SCAN_DONE)) {
}
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, uint8_t adv_type, const int8_t rssi, const uint8_t *data, size_t data_len) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
data_len = MIN(o->irq_data_data_alloc, data_len);
if (enqueue_irq(o, 1 + 6 + 1 + 1 + 2 + data_len, MP_BLUETOOTH_IRQ_SCAN_RESULT)) {
ringbuf_put(&o->ringbuf, addr_type);
for (int i = 0; i < 6; ++i) {
ringbuf_put(&o->ringbuf, addr[i]);
}
// The adv_type will get extracted as an int8_t but that's ok because valid values are 0x00-0x04.
ringbuf_put(&o->ringbuf, adv_type);
// Note conversion of int8_t rssi to uint8_t. Must un-convert on the way out.
ringbuf_put(&o->ringbuf, (uint8_t)rssi);
// Length field is 16-bit.
data_len = MIN(UINT16_MAX, data_len);
ringbuf_put16(&o->ringbuf, data_len);
for (size_t i = 0; i < data_len; ++i) {
ringbuf_put(&o->ringbuf, data[i]);
}
}
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gattc_on_primary_service_result(uint16_t conn_handle, uint16_t start_handle, uint16_t end_handle, mp_obj_bluetooth_uuid_t *service_uuid) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 2 + 2 + 1 + service_uuid->type, MP_BLUETOOTH_IRQ_GATTC_SERVICE_RESULT)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, start_handle);
ringbuf_put16(&o->ringbuf, end_handle);
ringbuf_put_uuid(&o->ringbuf, service_uuid);
}
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gattc_on_characteristic_result(uint16_t conn_handle, uint16_t def_handle, uint16_t value_handle, uint8_t properties, mp_obj_bluetooth_uuid_t *characteristic_uuid) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 2 + 2 + 1 + characteristic_uuid->type, MP_BLUETOOTH_IRQ_GATTC_CHARACTERISTIC_RESULT)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, def_handle);
ringbuf_put16(&o->ringbuf, value_handle);
ringbuf_put(&o->ringbuf, properties);
ringbuf_put_uuid(&o->ringbuf, characteristic_uuid);
}
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gattc_on_descriptor_result(uint16_t conn_handle, uint16_t handle, mp_obj_bluetooth_uuid_t *descriptor_uuid) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 2 + 1 + descriptor_uuid->type, MP_BLUETOOTH_IRQ_GATTC_DESCRIPTOR_RESULT)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, handle);
ringbuf_put_uuid(&o->ringbuf, descriptor_uuid);
}
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gattc_on_discover_complete(uint8_t event, uint16_t conn_handle, uint16_t status) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 2, event)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, status);
}
schedule_ringbuf(atomic_state);
}
size_t mp_bluetooth_gattc_on_data_available_start(uint8_t event, uint16_t conn_handle, uint16_t value_handle, size_t data_len, mp_uint_t *atomic_state_out) {
MICROPY_PY_BLUETOOTH_ENTER
*atomic_state_out = atomic_state;
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
data_len = MIN(o->irq_data_data_alloc, data_len);
if (enqueue_irq(o, 2 + 2 + 2 + data_len, event)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, value_handle);
// Length field is 16-bit.
data_len = MIN(UINT16_MAX, data_len);
ringbuf_put16(&o->ringbuf, data_len);
return data_len;
} else {
return 0;
}
}
void mp_bluetooth_gattc_on_data_available_chunk(const uint8_t *data, size_t data_len) {
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
for (size_t i = 0; i < data_len; ++i) {
ringbuf_put(&o->ringbuf, data[i]);
}
}
void mp_bluetooth_gattc_on_data_available_end(mp_uint_t atomic_state) {
schedule_ringbuf(atomic_state);
}
void mp_bluetooth_gattc_on_read_write_status(uint8_t event, uint16_t conn_handle, uint16_t value_handle, uint16_t status) {
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (enqueue_irq(o, 2 + 2 + 2, event)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, value_handle);
ringbuf_put16(&o->ringbuf, status);
}
schedule_ringbuf(atomic_state);
}
#endif // MICROPY_PY_BLUETOOTH_ENABLE_CENTRAL_MODE
#if MICROPY_PY_BLUETOOTH_GATTS_ON_READ_CALLBACK
// This can only be enabled when the thread invoking this is a MicroPython thread.
// On ESP32, for example, this is not the case.
bool mp_bluetooth_gatts_on_read_request(uint16_t conn_handle, uint16_t value_handle) {
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
if (o->irq_handler != mp_const_none) {
// Use pre-allocated tuple because this is a hard IRQ.
mp_obj_tuple_t *data = MP_OBJ_TO_PTR(o->irq_data_tuple);
data->items[0] = MP_OBJ_NEW_SMALL_INT(conn_handle);
data->items[1] = MP_OBJ_NEW_SMALL_INT(value_handle);
data->len = 2;
mp_obj_t irq_ret = mp_call_function_2_protected(o->irq_handler, MP_OBJ_NEW_SMALL_INT(MP_BLUETOOTH_IRQ_GATTS_READ_REQUEST), o->irq_data_tuple);
// If the IRQ handler explicitly returned false, then deny the read. Otherwise if it returns None/True, allow it.
return irq_ret != MP_OBJ_NULL && (irq_ret == mp_const_none || mp_obj_is_true(irq_ret));
} else {
// No IRQ handler, allow the read.
return true;
}
}
#endif
void mp_bluetooth_gatts_db_create_entry(mp_gatts_db_t db, uint16_t handle, size_t len) {
mp_map_elem_t *elem = mp_map_lookup(db, MP_OBJ_NEW_SMALL_INT(handle), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
mp_bluetooth_gatts_db_entry_t *entry = m_new(mp_bluetooth_gatts_db_entry_t, 1);
entry->data = m_new(uint8_t, len);
entry->data_alloc = len;
entry->data_len = 0;
entry->append = false;
elem->value = MP_OBJ_FROM_PTR(entry);
}
mp_bluetooth_gatts_db_entry_t *mp_bluetooth_gatts_db_lookup(mp_gatts_db_t db, uint16_t handle) {
mp_map_elem_t *elem = mp_map_lookup(db, MP_OBJ_NEW_SMALL_INT(handle), MP_MAP_LOOKUP);
if (!elem) {
return NULL;
}
return MP_OBJ_TO_PTR(elem->value);
}
int mp_bluetooth_gatts_db_read(mp_gatts_db_t db, uint16_t handle, uint8_t **value, size_t *value_len) {
MICROPY_PY_BLUETOOTH_ENTER
mp_bluetooth_gatts_db_entry_t *entry = mp_bluetooth_gatts_db_lookup(db, handle);
if (entry) {
*value = entry->data;
*value_len = entry->data_len;
if (entry->append) {
entry->data_len = 0;
}
}
MICROPY_PY_BLUETOOTH_EXIT
return entry ? 0 : MP_EINVAL;
}
int mp_bluetooth_gatts_db_write(mp_gatts_db_t db, uint16_t handle, const uint8_t *value, size_t value_len) {
MICROPY_PY_BLUETOOTH_ENTER
mp_bluetooth_gatts_db_entry_t *entry = mp_bluetooth_gatts_db_lookup(db, handle);
if (entry) {
if (value_len > entry->data_alloc) {
uint8_t *data = m_new_maybe(uint8_t, value_len);
if (data) {
entry->data = data;
entry->data_alloc = value_len;
} else {
MICROPY_PY_BLUETOOTH_EXIT
return MP_ENOMEM;
}
}
memcpy(entry->data, value, value_len);
entry->data_len = value_len;
}
MICROPY_PY_BLUETOOTH_EXIT
return entry ? 0 : MP_EINVAL;
}
int mp_bluetooth_gatts_db_resize(mp_gatts_db_t db, uint16_t handle, size_t len, bool append) {
MICROPY_PY_BLUETOOTH_ENTER
mp_bluetooth_gatts_db_entry_t *entry = mp_bluetooth_gatts_db_lookup(db, handle);
if (entry) {
uint8_t *data = m_renew_maybe(uint8_t, entry->data, entry->data_alloc, len, true);
if (data) {
entry->data = data;
entry->data_alloc = len;
entry->data_len = 0;
entry->append = append;
} else {
MICROPY_PY_BLUETOOTH_EXIT
return MP_ENOMEM;
}
}
MICROPY_PY_BLUETOOTH_EXIT
return entry ? 0 : MP_EINVAL;
}
#endif // MICROPY_PY_BLUETOOTH
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