Extmod bluetooth addr mode unix h4 reliability #2
ports/unix: Implement BLE H4 HCI UART for btstack/nimble.
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| /* | ||
| * This file is part of the MicroPython project, http://micropython.org/ | ||
| * | ||
| * The MIT License (MIT) | ||
| * | ||
| * Copyright (c) 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. | ||
| */ | ||
|
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| #include "py/runtime.h" | ||
| #include "py/mperrno.h" | ||
| #include "py/mphal.h" | ||
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| #if MICROPY_PY_BLUETOOTH && (MICROPY_BLUETOOTH_NIMBLE || (MICROPY_BLUETOOTH_BTSTACK && MICROPY_BLUETOOTH_BTSTACK_H4)) | ||
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| #if !MICROPY_PY_THREAD | ||
| #error Unix HCI UART requires MICROPY_PY_THREAD | ||
| #endif | ||
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| #include "extmod/modbluetooth.h" | ||
| #include "extmod/mpbthci.h" | ||
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| #include <pthread.h> | ||
| #include <unistd.h> | ||
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| #include <termios.h> | ||
| #include <fcntl.h> | ||
| #include <stdlib.h> | ||
| #include <string.h> | ||
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| #define DEBUG_printf(...) // printf(__VA_ARGS__) | ||
| #define DEBUG_HCI_DUMP (0) | ||
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| uint8_t mp_bluetooth_hci_cmd_buf[4 + 256]; | ||
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| // Must be provided by the stack bindings (e.g. mpnimbleport.c or mpbtstackport.c). | ||
| extern bool mp_bluetooth_hci_poll(void); | ||
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| STATIC const useconds_t UART_POLL_INTERVAL_US = 1000; | ||
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| STATIC int uart_fd = -1; | ||
| STATIC pthread_t hci_poll_thread_id; | ||
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| STATIC void *hci_poll_thread(void *arg) { | ||
| (void)arg; | ||
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| // This will return false when the stack is shutdown. | ||
| while (mp_bluetooth_hci_poll()) { | ||
| usleep(UART_POLL_INTERVAL_US); | ||
| } | ||
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| return NULL; | ||
| } | ||
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| STATIC int configure_uart(void) { | ||
| struct termios toptions; | ||
|
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| // Get existing config. | ||
| if (tcgetattr(uart_fd, &toptions) < 0) { | ||
| DEBUG_printf("Couldn't get term attributes"); | ||
| return -1; | ||
| } | ||
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| // Raw mode (disable all processing). | ||
| cfmakeraw(&toptions); | ||
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| // 8N1, no parity. | ||
| toptions.c_cflag &= ~CSTOPB; | ||
| toptions.c_cflag |= CS8; | ||
| toptions.c_cflag &= ~PARENB; | ||
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| // Enable receiver, ignore modem control lines | ||
| toptions.c_cflag |= CREAD | CLOCAL; | ||
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| // Blocking, single-byte reads. | ||
| toptions.c_cc[VMIN] = 1; | ||
| toptions.c_cc[VTIME] = 0; | ||
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| // Enable HW RTS/CTS flow control. | ||
| toptions.c_iflag &= ~(IXON | IXOFF | IXANY); | ||
| toptions.c_cflag |= CRTSCTS; | ||
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| // 1Mbit (TODO: make this configurable). | ||
| speed_t brate = B1000000; | ||
| cfsetospeed(&toptions, brate); | ||
| cfsetispeed(&toptions, brate); | ||
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| // Apply immediately. | ||
| if (tcsetattr(uart_fd, TCSANOW, &toptions) < 0) { | ||
| DEBUG_printf("Couldn't set term attributes"); | ||
| return -1; | ||
| } | ||
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| return 0; | ||
| } | ||
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| // HCI UART bindings. | ||
| int mp_bluetooth_hci_uart_init(uint32_t port, uint32_t baudrate) { | ||
| (void)port; | ||
| (void)baudrate; | ||
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| DEBUG_printf("mp_bluetooth_hci_uart_init (unix)\n"); | ||
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| char uart_device_name[256] = "/dev/ttyUSB0"; | ||
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| char *path = getenv("MICROPYBTUART"); | ||
| if (path != NULL) { | ||
| strcpy(uart_device_name, path); | ||
| } | ||
| DEBUG_printf("Using HCI UART: %s\n", uart_device_name); | ||
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| int flags = O_RDWR | O_NOCTTY | O_NONBLOCK; | ||
| uart_fd = open(uart_device_name, flags); | ||
| if (uart_fd == -1) { | ||
| DEBUG_printf("Unable to open port %s", uart_device_name); | ||
| return -1; | ||
| } | ||
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| if (configure_uart()) { | ||
| return -1; | ||
| } | ||
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| // Create a thread to run the polling loop. | ||
| pthread_attr_t attr; | ||
| pthread_attr_init(&attr); | ||
| pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | ||
| pthread_create(&hci_poll_thread_id, &attr, &hci_poll_thread, NULL); | ||
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| return 0; | ||
| } | ||
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| int mp_bluetooth_hci_uart_deinit(void) { | ||
| DEBUG_printf("mp_bluetooth_hci_uart_deinit\n"); | ||
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| // Wait for the poll loop to terminate when the state is set to OFF. | ||
| pthread_join(hci_poll_thread_id, NULL); | ||
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| // Close the UART. | ||
| close(uart_fd); | ||
| uart_fd = -1; | ||
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| return 0; | ||
| } | ||
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| int mp_bluetooth_hci_uart_set_baudrate(uint32_t baudrate) { | ||
| (void)baudrate; | ||
| DEBUG_printf("mp_bluetooth_hci_uart_set_baudrate\n"); | ||
| return 0; | ||
| } | ||
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| int mp_bluetooth_hci_uart_readchar(void) { | ||
| // DEBUG_printf("mp_bluetooth_hci_uart_readchar\n"); | ||
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| uint8_t c; | ||
| ssize_t bytes_read = read(uart_fd, &c, 1); | ||
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| if (bytes_read == 1) { | ||
| #if DEBUG_HCI_DUMP | ||
| printf("[% 8ld] RX: %02x\n", mp_hal_ticks_ms(), c); | ||
| #endif | ||
| return c; | ||
| } else { | ||
| return -1; | ||
| } | ||
| } | ||
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| int mp_bluetooth_hci_uart_write(const uint8_t *buf, size_t len) { | ||
| // DEBUG_printf("mp_bluetooth_hci_uart_write\n"); | ||
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| #if DEBUG_HCI_DUMP | ||
| printf("[% 8ld] TX: %02x", mp_hal_ticks_ms(), buf[0]); | ||
| for (size_t i = 1; i < len; ++i) { | ||
| printf(":%02x", buf[i]); | ||
| } | ||
| printf("\n"); | ||
| #endif | ||
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| return write(uart_fd, buf, len); | ||
| } | ||
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| // No-op implementations of HCI controller interface. | ||
| int mp_bluetooth_hci_controller_init(void) { | ||
| return 0; | ||
| } | ||
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| int mp_bluetooth_hci_controller_deinit(void) { | ||
| return 0; | ||
| } | ||
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| int mp_bluetooth_hci_controller_sleep_maybe(void) { | ||
| return 0; | ||
| } | ||
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| bool mp_bluetooth_hci_controller_woken(void) { | ||
| return true; | ||
| } | ||
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| int mp_bluetooth_hci_controller_wakeup(void) { | ||
| return 0; | ||
| } | ||
|
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| #endif // MICROPY_PY_BLUETOOTH && (MICROPY_BLUETOOTH_NIMBLE || (MICROPY_BLUETOOTH_BTSTACK && MICROPY_BLUETOOTH_BTSTACK_H4)) |
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this duplicates the line just below