/* * SPDX-License-Identifier: MIT * * Copyright (C) 2013-2024 OpenMV, LLC. * * 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. * * Buzzer Python module. */ #include "py/obj.h" #include "omv_boardconfig.h" #if MICROPY_PY_BUZZER #include STM32_HAL_H #include "omv_gpio.h" static TIM_HandleTypeDef buzzer_tim_handle = {}; static int buzzer_freq = OMV_BUZZER_FREQ; static int buzzer_duty = 0; static void buzzer_setup(int freq, int duty) { int tclk = OMV_BUZZER_TIM_PCLK_FREQ() * 2; int period = (tclk / freq) - 1; int pulse = (period * duty) / 510; if (((buzzer_duty <= 0) || (255 < buzzer_duty)) && (0 < duty) && (duty <= 255)) { omv_gpio_config(OMV_BUZZER_PIN, OMV_GPIO_MODE_ALT, OMV_GPIO_PULL_NONE, OMV_GPIO_SPEED_LOW, -1); buzzer_tim_handle.Instance = OMV_BUZZER_TIM; buzzer_tim_handle.Init.Prescaler = 0; buzzer_tim_handle.Init.CounterMode = TIM_COUNTERMODE_UP; buzzer_tim_handle.Init.Period = period; buzzer_tim_handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; buzzer_tim_handle.Init.RepetitionCounter = 0; buzzer_tim_handle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; TIM_OC_InitTypeDef buzzer_tim_oc_handle; buzzer_tim_oc_handle.Pulse = pulse; buzzer_tim_oc_handle.OCMode = TIM_OCMODE_PWM1; buzzer_tim_oc_handle.OCPolarity = TIM_OCPOLARITY_HIGH; buzzer_tim_oc_handle.OCNPolarity = TIM_OCNPOLARITY_HIGH; buzzer_tim_oc_handle.OCFastMode = TIM_OCFAST_DISABLE; buzzer_tim_oc_handle.OCIdleState = TIM_OCIDLESTATE_RESET; buzzer_tim_oc_handle.OCNIdleState = TIM_OCNIDLESTATE_RESET; HAL_TIM_PWM_Init(&buzzer_tim_handle); HAL_TIM_PWM_ConfigChannel(&buzzer_tim_handle, &buzzer_tim_oc_handle, OMV_BUZZER_TIM_CHANNEL); HAL_TIM_PWM_Start(&buzzer_tim_handle, OMV_BUZZER_TIM_CHANNEL); } else if ((0 < buzzer_duty) && (buzzer_duty <= 255) && ((duty <= 0) || (255 < duty))) { HAL_TIM_PWM_Stop(&buzzer_tim_handle, OMV_BUZZER_TIM_CHANNEL); HAL_TIM_PWM_DeInit(&buzzer_tim_handle); omv_gpio_deinit(OMV_BUZZER_PIN); } else if ((0 < buzzer_duty) && (buzzer_duty <= 255) && (0 < duty) && (duty <= 255)) { __HAL_TIM_SET_AUTORELOAD(&buzzer_tim_handle, period); __HAL_TIM_SET_COMPARE(&buzzer_tim_handle, OMV_BUZZER_TIM_CHANNEL, pulse); } buzzer_freq = freq; buzzer_duty = duty; } static mp_obj_t py_buzzer_freq(uint n_args, const mp_obj_t *args) { if (!n_args) { return mp_obj_new_int(buzzer_freq); } else { buzzer_setup(mp_obj_get_int(*args), buzzer_duty); return mp_const_none; } } static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(py_buzzer_freq_obj, 0, 1, py_buzzer_freq); static mp_obj_t py_buzzer_duty(uint n_args, const mp_obj_t *args) { if (!n_args) { return mp_obj_new_int(buzzer_duty); } else { buzzer_setup(buzzer_freq, mp_obj_get_int(*args)); return mp_const_none; } } static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(py_buzzer_duty_obj, 0, 1, py_buzzer_duty); static const mp_rom_map_elem_t globals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_buzzer) }, { MP_ROM_QSTR(MP_QSTR_RESONANT_FREQ), MP_ROM_INT(OMV_BUZZER_FREQ) }, { MP_ROM_QSTR(MP_QSTR_freq), MP_ROM_PTR(&py_buzzer_freq_obj) }, { MP_ROM_QSTR(MP_QSTR_duty), MP_ROM_PTR(&py_buzzer_duty_obj) } }; static MP_DEFINE_CONST_DICT(globals_dict, globals_dict_table); const mp_obj_module_t buzzer_module = { .base = { &mp_type_module }, .globals = (mp_obj_t) &globals_dict, }; void py_buzzer_init0() { buzzer_setup(OMV_BUZZER_FREQ, 0); } MP_REGISTER_MODULE(MP_QSTR_buzzer, buzzer_module); #endif // MICROPY_PY_BUZZER