kopia lustrzana https://github.com/micropython/micropython
92 wiersze
3.3 KiB
C
92 wiersze
3.3 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) 2021 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 <stdio.h>
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "timer.h"
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#include "extmod/mpbthci.h"
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#if !BUILDING_MBOOT
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#define CC2564_PIN_CTS (pyb_pin_BT_CTS)
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#define CC2564_PIN_RTS (pyb_pin_BT_RTS)
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#define CC2564_PIN_BT_SLOWCLK (pyb_pin_BT_SLOWCLK)
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#define CC2564_PIN_BT_ENABLE (pyb_pin_BT_ENABLE)
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// slight difference between LEGO_HUB_NO6 and LEGO_HUB_NO7
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#ifndef CC2564_TIMER_BT_SLOWCLOCK_TIM
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#define CC2564_TIMER_BT_SLOWCLOCK_TIM 8
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#define CC2564_TIMER_BT_SLOWCLOCK_TIM_CH 4
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#endif
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STATIC void cc2564_wait_cts_low(mp_hal_pin_obj_t cts, uint32_t timeout_ms) {
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for (int i = 0; i < timeout_ms; ++i) {
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if (mp_hal_pin_read(cts) == 0) {
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break;
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}
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mp_hal_delay_ms(1);
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}
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}
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int mp_bluetooth_hci_controller_init(void) {
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// Pull BTNSHUTD low to disable chip.
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mp_hal_pin_output(CC2564_PIN_BT_ENABLE);
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mp_hal_pin_low(CC2564_PIN_BT_ENABLE);
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// Output a 32768Hz signal on BTSLOWCLK.
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// tim = pyb.Timer(TIM, freq=32768)
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// tim_ch = tim.channel(TIM_CH, pyb.Timer.PWM, pin=btclk)
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// tim_ch.pulse_width_percent(50)
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mp_obj_t args[6] = { MP_OBJ_NEW_SMALL_INT(CC2564_TIMER_BT_SLOWCLOCK_TIM), MP_OBJ_NEW_QSTR(MP_QSTR_freq), MP_OBJ_NEW_SMALL_INT(32768), MP_OBJ_NULL };
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mp_obj_t tim = MP_OBJ_TYPE_GET_SLOT(&pyb_timer_type, make_new)(&pyb_timer_type, 1, 1, args);
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mp_load_method(tim, MP_QSTR_channel, args);
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args[2] = MP_OBJ_NEW_SMALL_INT(CC2564_TIMER_BT_SLOWCLOCK_TIM_CH);
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args[3] = MP_OBJ_NEW_SMALL_INT(0); // CHANNEL_MODE_PWM_NORMAL
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args[4] = MP_OBJ_NEW_QSTR(MP_QSTR_pin);
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args[5] = (mp_obj_t)CC2564_PIN_BT_SLOWCLK;
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mp_obj_t tim_ch = mp_call_method_n_kw(2, 1, args);
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mp_load_method(tim_ch, MP_QSTR_pulse_width_percent, args);
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args[2] = MP_OBJ_NEW_SMALL_INT(50);
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mp_call_method_n_kw(1, 0, args);
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// Pull BTNSHUTD high to enable chip and wait for CTS to go low to indicate ready.
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mp_hal_pin_high(CC2564_PIN_BT_ENABLE);
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cc2564_wait_cts_low(CC2564_PIN_CTS, 500);
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return 0;
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}
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int mp_bluetooth_hci_controller_deinit(void) {
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// Pull BTNSHUTD low to disable chip.
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mp_hal_pin_low(CC2564_PIN_BT_ENABLE);
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return 0;
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}
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#endif
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