150 lines
4.7 KiB
C
150 lines
4.7 KiB
C
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/*
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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) 2023 Arduino SA
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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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* ESP-Hosted Bluetooth HCI driver.
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*/
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#include "py/mphal.h"
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#if MICROPY_PY_BLUETOOTH && MICROPY_PY_NETWORK_ESP_HOSTED
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#include <stdio.h>
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#include <string.h>
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#include "py/runtime.h"
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#include "extmod/mpbthci.h"
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#include "esp_hosted_hal.h"
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#define HCI_COMMAND_PACKET (0x01)
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#define HCI_ACLDATA_PACKET (0x02)
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#define HCI_EVENT_PACKET (0x04)
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#define HCI_COMMAND_COMPLETE (0x0e)
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#define HCI_COMMAND_TIMEOUT (3000)
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#define OGF_LINK_CTL (0x01)
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#define OGF_HOST_CTL (0x03)
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#define OCF_SET_EVENT_MASK (0x0001)
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#define OCF_RESET (0x0003)
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// Provided by the port, and also possibly shared with the stack.
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extern uint8_t mp_bluetooth_hci_cmd_buf[4 + 256];
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int esp_hosted_hci_cmd(int ogf, int ocf, size_t param_len, const uint8_t *param_buf) {
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uint8_t *buf = mp_bluetooth_hci_cmd_buf;
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buf[0] = HCI_COMMAND_PACKET;
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buf[1] = ocf;
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buf[2] = ogf << 2 | ocf >> 8;
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buf[3] = param_len;
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if (param_len) {
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memcpy(buf + 4, param_buf, param_len);
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}
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debug_printf("HCI Command: %02x %02x %02x %02x\n", buf[0], buf[1], buf[2], buf[3]);
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mp_bluetooth_hci_uart_write(buf, 4 + param_len);
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// Receive HCI event packet, initially reading 3 bytes (HCI Event, Event code, Plen).
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for (mp_uint_t start = mp_hal_ticks_ms(), size = 3, i = 0; i < size;) {
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while (!mp_bluetooth_hci_uart_any()) {
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MICROPY_EVENT_POLL_HOOK
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// Timeout.
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if ((mp_hal_ticks_ms() - start) > HCI_COMMAND_TIMEOUT) {
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error_printf("timeout waiting for HCI packet\n");
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return -1;
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}
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}
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buf[i] = mp_bluetooth_hci_uart_readchar();
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// There seems to be a sync issue with this fw/module.
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if (i == 0 && buf[0] == 0xFF) {
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continue;
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}
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// Check for packet type.
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if (i == 0 && buf[0] != HCI_EVENT_PACKET) {
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error_printf("unexpected HCI packet: %02x\n", buf[0]);
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return -1;
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}
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// Sanity check the packet parameters length.
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if (i == 2 && ((size += buf[2]) > sizeof(mp_bluetooth_hci_cmd_buf))) {
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error_printf("unexpected event packet length: %d\n", size);
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return -1;
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}
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i++;
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}
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// We're only looking for command complete events.
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if (buf[1] != HCI_COMMAND_COMPLETE || buf[4] != ocf || buf[5] != (ogf << 2 | ocf >> 8)) {
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error_printf("response mismatch: %02x %02x\n", buf[4], buf[5]);
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return -1;
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}
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// Log event.
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debug_printf("HCI Event packet: %02x %02x %02x %02x %02x %02x %02x\n",
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
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// Status code.
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return buf[6];
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}
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int mp_bluetooth_hci_controller_init(void) {
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// Low-level pins init, memory pool allocation etc...
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esp_hosted_hal_init(ESP_HOSTED_MODE_BT);
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mp_uint_t start = mp_hal_ticks_ms();
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// Skip bootloader messages.
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while ((mp_hal_ticks_ms() - start) < 2500) {
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if (mp_bluetooth_hci_uart_any()) {
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mp_bluetooth_hci_uart_readchar();
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}
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MICROPY_EVENT_POLL_HOOK
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}
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#ifdef MICROPY_HW_BLE_UART_BAUDRATE_SECONDARY
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mp_bluetooth_hci_uart_set_baudrate(MICROPY_HW_BLE_UART_BAUDRATE_SECONDARY);
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#endif
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mp_hal_pin_output(MICROPY_HW_BLE_UART_RTS);
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mp_hal_pin_write(MICROPY_HW_BLE_UART_RTS, 0);
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// Send reset command
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// It seems that nothing else is needed for now.
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return esp_hosted_hci_cmd(OGF_HOST_CTL, OCF_RESET, 0, NULL);
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}
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int mp_bluetooth_hci_controller_deinit(void) {
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esp_hosted_hal_deinit();
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return 0;
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}
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#endif
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