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extmod/modbluetooth: Improve ringbuf handling.

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No need to share the irq_data buffer with addresses.  Split them into two
separate buffers and manage their max length independently.
This commit is contained in:
Jim Mussared 2019-10-14 23:37:35 +11:00 committed by Damien George
parent cb73103f57
commit 423e67d0a0
1 changed files with 17 additions and 14 deletions
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31
extmod/modbluetooth.c
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@ -59,6 +59,7 @@ typedef struct {
mp_obj_base_t base;
mp_obj_t irq_handler;
mp_obj_t irq_data_tuple;
uint8_t irq_addr_bytes[6];
uint8_t irq_data_bytes[MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN];
mp_obj_t irq_data_uuid;
uint16_t irq_trigger;
@ -232,7 +233,7 @@ STATIC mp_obj_t bluetooth_ble_make_new(const mp_obj_type_t *type, size_t n_args,
mp_obj_bluetooth_ble_t *o = m_new_obj(mp_obj_bluetooth_ble_t);
o->base.type = &bluetooth_ble_type;
o->irq_handler = mp_const_none;
// Pre-allocated the event data tuple to prevent needing to allocate in the IRQ handler.
// 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);
mp_obj_bluetooth_uuid_t *uuid = m_new_obj(mp_obj_bluetooth_uuid_t);
uuid->base.type = &bluetooth_uuid_type;
@ -287,9 +288,9 @@ STATIC mp_obj_t bluetooth_ble_irq(size_t n_args, const mp_obj_t *pos_args, mp_ma
// Update the callback.
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t* bt = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
bt->irq_handler = callback;
bt->irq_trigger = args[ARG_trigger].u_int;
mp_obj_bluetooth_ble_t* o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
o->irq_handler = callback;
o->irq_trigger = args[ARG_trigger].u_int;
MICROPY_PY_BLUETOOTH_EXIT
return mp_const_none;
@ -693,7 +694,7 @@ STATIC void ringbuf_extract(ringbuf_t* ringbuf, mp_obj_tuple_t *data_tuple, size
if (bytes_addr) {
bytes_addr->len = 6;
for (int i = 0; i < bytes_addr->len; ++i) {
// cast away const, this is actually bt->irq_data_bytes.
// 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);
@ -715,7 +716,7 @@ STATIC void ringbuf_extract(ringbuf_t* ringbuf, mp_obj_tuple_t *data_tuple, size
if (bytes_data) {
bytes_data->len = ringbuf_get(ringbuf);
for (int i = 0; i < bytes_data->len; ++i) {
// cast away const, this is actually bt->irq_data_bytes + 6.
// 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);
@ -746,8 +747,8 @@ STATIC mp_obj_t bluetooth_ble_invoke_irq(mp_obj_t none_in) {
// Some events need to pass bytes objects to their handler, using the
// pre-allocated bytes array.
mp_obj_str_t irq_data_bytes_addr = {{&mp_type_bytes}, 0, 6, o->irq_data_bytes};
mp_obj_str_t irq_data_bytes_data = {{&mp_type_bytes}, 0, 0, o->irq_data_bytes + 6};
mp_obj_str_t irq_data_bytes_addr = {{&mp_type_bytes}, 0, 6, o->irq_addr_bytes};
mp_obj_str_t irq_data_bytes_data = {{&mp_type_bytes}, 0, 0, o->irq_data_bytes};
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
@ -799,7 +800,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(bluetooth_ble_invoke_irq_obj, bluetooth_ble_inv
STATIC bool enqueue_irq(mp_obj_bluetooth_ble_t *o, size_t len, uint16_t event, bool *sched) {
*sched = false;
if (ringbuf_free(&o->ringbuf) >= len + 2 && (o->irq_trigger & event) && o->irq_handler != mp_const_none) {
if (o && ringbuf_free(&o->ringbuf) >= len + 2 && (o->irq_trigger & event) && o->irq_handler != mp_const_none) {
*sched = ringbuf_avail(&o->ringbuf) == 0;
ringbuf_put16(&o->ringbuf, event);
return true;
@ -818,7 +819,7 @@ void mp_bluetooth_gap_on_connected_disconnected(uint16_t event, uint16_t conn_ha
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
bool sched;
if (enqueue_irq(o, 9, event, &sched)) {
if (enqueue_irq(o, 2 + 1 + 6, event, &sched)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put(&o->ringbuf, addr_type);
for (int i = 0; i < 6; ++i) {
@ -833,7 +834,7 @@ 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));
bool sched;
if (enqueue_irq(o, 4, MP_BLUETOOTH_IRQ_GATTS_WRITE, &sched)) {
if (enqueue_irq(o, 2 + 2, MP_BLUETOOTH_IRQ_GATTS_WRITE, &sched)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, value_handle);
}
@ -856,7 +857,8 @@ void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, boo
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
bool sched;
if (enqueue_irq(o, 1 + 6 + 1 + 1 + data_len, MP_BLUETOOTH_IRQ_SCAN_RESULT, &sched)) {
data_len = MIN(MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN, data_len);
if (enqueue_irq(o, 1 + 6 + 1 + 1 + 1 + data_len, MP_BLUETOOTH_IRQ_SCAN_RESULT, &sched)) {
ringbuf_put(&o->ringbuf, addr_type);
for (int i = 0; i < 6; ++i) {
ringbuf_put(&o->ringbuf, addr[i]);
@ -864,7 +866,6 @@ void mp_bluetooth_gap_on_scan_result(uint8_t addr_type, const uint8_t *addr, boo
ringbuf_put(&o->ringbuf, connectable ? 1 : 0);
// Note conversion of int8_t rssi to uint8_t. Must un-convert on the way out.
ringbuf_put(&o->ringbuf, (uint8_t)rssi);
data_len = MIN(MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN, data_len);
ringbuf_put(&o->ringbuf, data_len);
for (int i = 0; i < data_len; ++i) {
ringbuf_put(&o->ringbuf, data[i]);
@ -920,10 +921,10 @@ void mp_bluetooth_gattc_on_data_available(uint16_t event, uint16_t conn_handle,
MICROPY_PY_BLUETOOTH_ENTER
mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
bool sched;
data_len = MIN(MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN, data_len);
if (enqueue_irq(o, 2 + 2 + 1 + data_len, event, &sched)) {
ringbuf_put16(&o->ringbuf, conn_handle);
ringbuf_put16(&o->ringbuf, value_handle);
data_len = MIN(MICROPY_PY_BLUETOOTH_MAX_EVENT_DATA_BYTES_LEN, data_len);
ringbuf_put(&o->ringbuf, data_len);
for (int i = 0; i < data_len; ++i) {
ringbuf_put(&o->ringbuf, data[i]);
@ -949,6 +950,8 @@ void mp_bluetooth_gattc_on_write_status(uint16_t conn_handle, uint16_t value_han
#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_trigger & MP_BLUETOOTH_IRQ_GATTS_READ_REQUEST) && o->irq_handler != mp_const_none) {