61d1e4b01b
This changes stm32 from using PENDSV to run NimBLE to use the MicroPython scheduler instead. This allows Python BLE callbacks to be invoked directly (and therefore synchronously) rather than via the ringbuffer. The NimBLE UART HCI and event processing now happens in a scheduled task every 128ms. When RX IRQ idle events arrive, it will also schedule this task to improve latency. There is a similar change for the unix port where the background thread now queues the scheduled task. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018-2019 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "nimble/ble.h"
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#include "extmod/nimble/hal/hal_uart.h"
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#include "extmod/nimble/nimble/nimble_npl_os.h"
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#include "extmod/mpbthci.h"
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#if MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_NIMBLE
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#define HCI_TRACE (0)
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static hal_uart_tx_cb_t hal_uart_tx_cb;
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static void *hal_uart_tx_arg;
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static hal_uart_rx_cb_t hal_uart_rx_cb;
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static void *hal_uart_rx_arg;
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// Provided by the port, and also possibly shared with the driver.
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extern uint8_t mp_bluetooth_hci_cmd_buf[4 + 256];
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int hal_uart_init_cbs(uint32_t port, hal_uart_tx_cb_t tx_cb, void *tx_arg, hal_uart_rx_cb_t rx_cb, void *rx_arg) {
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hal_uart_tx_cb = tx_cb;
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hal_uart_tx_arg = tx_arg;
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hal_uart_rx_cb = rx_cb;
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hal_uart_rx_arg = rx_arg;
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return 0; // success
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}
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int hal_uart_config(uint32_t port, uint32_t baudrate, uint32_t bits, uint32_t stop, uint32_t parity, uint32_t flow) {
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return mp_bluetooth_hci_uart_init(port, baudrate);
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}
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void hal_uart_start_tx(uint32_t port) {
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size_t len = 0;
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for (;;) {
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int data = hal_uart_tx_cb(hal_uart_tx_arg);
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if (data == -1) {
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break;
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}
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mp_bluetooth_hci_cmd_buf[len++] = data;
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}
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#if HCI_TRACE
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printf("< [% 8d] %02x", mp_hal_ticks_ms(), mp_bluetooth_hci_cmd_buf[0]);
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for (size_t i = 1; i < len; ++i) {
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printf(":%02x", mp_bluetooth_hci_cmd_buf[i]);
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}
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printf("\n");
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#endif
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mp_bluetooth_hci_uart_write(mp_bluetooth_hci_cmd_buf, len);
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}
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int hal_uart_close(uint32_t port) {
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return 0; // success
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}
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void mp_bluetooth_nimble_hci_uart_process(bool run_events) {
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bool host_wake = mp_bluetooth_hci_controller_woken();
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int chr;
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while ((chr = mp_bluetooth_hci_uart_readchar()) >= 0) {
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#if HCI_TRACE
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printf("> %02x (%d)\n", chr);
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#endif
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hal_uart_rx_cb(hal_uart_rx_arg, chr);
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// Incoming data may result in events being enqueued. If we're in
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// scheduler context then we can run those events immediately.
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if (run_events) {
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mp_bluetooth_nimble_os_eventq_run_all();
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}
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}
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if (host_wake) {
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mp_bluetooth_hci_controller_sleep_maybe();
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}
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}
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#endif // MICROPY_PY_BLUETOOTH && MICROPY_BLUETOOTH_NIMBLE
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