From 930112753a43a07e6f771b680d559458f0913042 Mon Sep 17 00:00:00 2001 From: Glenn Ruben Bakke Date: Fri, 16 Dec 2016 19:48:28 +0100 Subject: [PATCH] nrf5: Adding pwm work in progress machine PWM module. --- nrf5/pwm.c | 230 +++++++++++++++++++++++++++++++++++++++++++++++++++++ nrf5/pwm.h | 29 +++++++ 2 files changed, 259 insertions(+) create mode 100644 nrf5/pwm.c create mode 100644 nrf5/pwm.h diff --git a/nrf5/pwm.c b/nrf5/pwm.c new file mode 100644 index 0000000000..446333b07d --- /dev/null +++ b/nrf5/pwm.c @@ -0,0 +1,230 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2016 Glenn Ruben Bakke + * + * 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. + */ + +#include +#include + +#include "py/nlr.h" +#include "py/runtime.h" +#include "py/mphal.h" +#include "pin.h" +#include "genhdr/pins.h" +#include "pwm.h" +#include "hal_pwm.h" + +#if MICROPY_PY_MACHINE_PWM + +typedef struct _pyb_pwm_obj_t { + mp_obj_base_t base; + PWM_HandleTypeDef *pwm; +} pyb_pwm_obj_t; + +#if MICROPY_HW_PWM0 +PWM_HandleTypeDef PWMHandle0 = {.instance = NULL}; +#endif + +STATIC const pyb_pwm_obj_t machine_pwm_obj[] = { + #if MICROPY_HW_PWM0 + {{&machine_hard_pwm_type}, &PWMHandle0}, + #else + {{&machine_hard_pwm_type}, NULL}, + #endif +}; + +void pwm_init0(void) { + // reset the PWM handles + #if MICROPY_HW_PWM0 + memset(&PWMHandle0, 0, sizeof(PWM_HandleTypeDef)); + PWMHandle0.instance = PWM0; + #endif +} + +STATIC int pwm_find(mp_obj_t id) { + if (MP_OBJ_IS_STR(id)) { + // given a string id + const char *port = mp_obj_str_get_str(id); + if (0) { + #ifdef MICROPY_HW_PWM0_NAME + } else if (strcmp(port, MICROPY_HW_PWM0_NAME) == 0) { + return 1; + #endif + } + nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, + "PWM(%s) does not exist", port)); + } else { + // given an integer id + int pwm_id = mp_obj_get_int(id); + if (pwm_id >= 0 && pwm_id <= MP_ARRAY_SIZE(machine_pwm_obj) + && machine_pwm_obj[pwm_id].pwm != NULL) { + return pwm_id; + } + nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, + "PWM(%d) does not exist", pwm_id)); + } +} + +void pwm_init(PWM_HandleTypeDef *pwm) { +} + +void pwm_deinit(PWM_HandleTypeDef *pwm) { +} + +STATIC void pwm_print(const mp_print_t *print, PWM_HandleTypeDef *pwm, bool legacy) { + uint pwm_num = 0; // default to PWM0 + mp_printf(print, "PWM(%u)", pwm_num); +} + +/******************************************************************************/ +/* MicroPython bindings for machine API */ + +// for make_new +enum { + ARG_NEW_id, + ARG_NEW_pin +}; + +// for init +enum { + ARG_INIT_pin +}; + +STATIC mp_obj_t machine_hard_pwm_make_new(mp_arg_val_t *args); +STATIC void machine_hard_pwm_init(mp_obj_t self, mp_arg_val_t *args); +STATIC void machine_hard_pwm_deinit(mp_obj_t self); + +/* common code for both soft and hard implementations *************************/ + +STATIC mp_obj_t machine_pwm_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) { + static const mp_arg_t allowed_args[] = { + { MP_QSTR_id, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} }, + { MP_QSTR_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} } + }; + + // parse args + mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; + mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); + + if (args[ARG_NEW_id].u_obj == MP_OBJ_NEW_SMALL_INT(-1)) { + // TODO: implement soft PWM + // return machine_soft_pwm_make_new(args); + return mp_const_none; + } else { + // hardware peripheral id given + return machine_hard_pwm_make_new(args); + } +} + +STATIC mp_obj_t machine_pwm_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { + static const mp_arg_t allowed_args[] = { + { MP_QSTR_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} } + }; + + // parse args + mp_obj_t self = pos_args[0]; + mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; + mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); + + // dispatch to specific implementation + if (mp_obj_get_type(self) == &machine_hard_pwm_type) { + machine_hard_pwm_init(self, args); + } + + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_pwm_init_obj, 1, machine_pwm_init); + +STATIC mp_obj_t machine_pwm_deinit(mp_obj_t self) { + // dispatch to specific implementation + if (mp_obj_get_type(self) == &machine_hard_pwm_type) { + machine_hard_pwm_deinit(self); + } + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_pwm_deinit_obj, machine_pwm_deinit); + +STATIC const mp_rom_map_elem_t machine_pwm_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_pwm_init_obj) }, + { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_pwm_deinit_obj) }, + + { MP_ROM_QSTR(MP_QSTR_start), MP_ROM_PTR(&mp_machine_pwm_start_obj) }, + { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&mp_machine_pwm_stop_obj) }, + { MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&mp_machine_pwm_update_obj) }, +}; + +STATIC MP_DEFINE_CONST_DICT(machine_pwm_locals_dict, machine_pwm_locals_dict_table); + +/* code for hard implementation ***********************************************/ + +typedef struct _machine_hard_pwm_obj_t { + mp_obj_base_t base; + const pyb_pwm_obj_t *pyb; +} machine_hard_pwm_obj_t; + +STATIC const machine_hard_pwm_obj_t machine_hard_pwm_obj[] = { + {{&machine_hard_pwm_type}, &machine_pwm_obj[0]}, +}; + +STATIC void machine_hard_pwm_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { + machine_hard_pwm_obj_t *self = self_in; + pwm_print(print, self->pyb->pwm, false); +} + +STATIC mp_obj_t machine_hard_pwm_make_new(mp_arg_val_t *args) { + // get static peripheral object + int pwm_id = pwm_find(args[ARG_NEW_id].u_obj); + const machine_hard_pwm_obj_t *self = &machine_hard_pwm_obj[pwm_id]; + + hal_pwm_init_t pwm_init_conf; + + // here we would check the sck/mosi/miso pins and configure them + if (args[ARG_NEW_pin].u_obj != MP_OBJ_NULL) { + pwm_init_conf.pwm_pin = mp_obj_get_int(args[ARG_NEW_pin].u_obj); + } else { + // TODO: raise exception. + } + + hal_pwm_init(self->pyb->pwm->instance, &pwm_init_conf); + + return MP_OBJ_FROM_PTR(self); +} + +STATIC void machine_hard_pwm_init(mp_obj_t self_in, mp_arg_val_t *args) { +} + +STATIC void machine_hard_pwm_deinit(mp_obj_t self_in) { + machine_hard_pwm_obj_t *self = self_in; + pwm_deinit(self->pyb->pwm); +} + +const mp_obj_type_t machine_hard_pwm_type = { + { &mp_type_type }, + .name = MP_QSTR_PWM, + .print = machine_hard_pwm_print, + .make_new = machine_pwm_make_new, + .locals_dict = (mp_obj_t)&machine_pwm_locals_dict, +}; + +#endif // MICROPY_PY_MACHINE_PWM diff --git a/nrf5/pwm.h b/nrf5/pwm.h new file mode 100644 index 0000000000..b6575a9e3f --- /dev/null +++ b/nrf5/pwm.h @@ -0,0 +1,29 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2016 Glenn Ruben Bakke + * + * 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. + */ + +#include "hal_pwm.h" + +extern const mp_obj_type_t machine_hard_pwm_type;