154 lines
5.5 KiB
C
154 lines
5.5 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) 2022 KY-zhang-X
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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 "py/mpconfig.h"
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#if MICROPY_PY_MACHINE_SPI
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#include "py/mphal.h"
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "extmod/machine_spi.h"
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#include "modmachine.h"
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#if !(MP_GEN_HDR)
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#include "tos_k.h"
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#include "mp_tos_hal_spi.h"
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#endif
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typedef struct _machine_hard_spi_obj_t {
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mp_obj_base_t base;
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hal_spi_port_t port;
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hal_spi_t spi;
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uint16_t timeout;
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uint16_t timeout_char;
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uint8_t init;
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} machine_hard_spi_obj_t;
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STATIC machine_hard_spi_obj_t machine_hard_spi_obj_all[MICROPY_HW_SPI_NUM];
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STATIC machine_hard_spi_obj_t *machine_hard_spi_find(mp_obj_t user_obj) {
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machine_hard_spi_obj_t *spi = NULL;
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if (mp_obj_is_int(user_obj)) {
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mp_uint_t spi_id = mp_obj_get_int(user_obj);
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if (spi_id < MICROPY_HW_SPI_NUM)
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spi = &machine_hard_spi_obj_all[spi_id];
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if (spi->base.type == NULL) {
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spi->base.type = &machine_hard_spi_type;
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spi->port = (hal_spi_port_t)spi_id;
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spi->init = 0;
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}
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}
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return spi;
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}
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STATIC void machine_hard_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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machine_hard_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "SPI(%u)", self->port);
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}
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STATIC mp_obj_t machine_hard_spi_init_helper(machine_hard_spi_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args);
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mp_obj_t machine_hard_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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// check arguments
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mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
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machine_hard_spi_obj_t *spi = machine_hard_spi_find(args[0]);
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if (spi == NULL) {
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mp_raise_msg(&mp_type_ValueError, MP_ERROR_TEXT("invalid spi"));
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}
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
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machine_hard_spi_init_helper(spi, n_args - 1, args + 1, &kw_args);
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return MP_OBJ_FROM_PTR(spi);
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}
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STATIC mp_obj_t machine_hard_spi_init_helper(machine_hard_spi_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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/*
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enum { ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_baudrate, MP_ARG_INT, {.u_int = 500000} },
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{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} },
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{ MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = SPI_FIRSTBIT_MSB} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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*/
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if (self->init) {
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mp_raise_msg_varg(&mp_type_OSError, MP_ERROR_TEXT("SPI(%u) has been initialized"), self->port);
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}
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if (0 != tos_hal_spi_init(&self->spi, self->port)) {
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mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("SPI(%u) doesn't exist"), self->port);
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}
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// FIXME: should not be fixed
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self->timeout = 100;
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self->timeout_char = 1;
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self->init = 1;
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return mp_const_none;
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}
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STATIC void machine_hard_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)self_in;
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machine_hard_spi_init_helper(self, n_args, pos_args, kw_args);
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}
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STATIC void machine_hard_spi_deinit(mp_obj_base_t *self_in) {
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machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)self_in;
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if (self->init) {
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tos_hal_spi_deinit(&self->spi);
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self->init = 0;
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}
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}
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STATIC void machine_hard_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
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machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)self_in;
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tos_hal_spi_transfer(&self->spi, src, dest, len, self->timeout + len * self->timeout_char);
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}
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STATIC const mp_machine_spi_p_t machine_hard_spi_p = {
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.init = machine_hard_spi_init,
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.deinit = machine_hard_spi_deinit,
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.transfer = machine_hard_spi_transfer,
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};
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const mp_obj_type_t machine_hard_spi_type = {
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{ &mp_type_type },
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.name = MP_QSTR_SPI,
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.print = machine_hard_spi_print,
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.make_new = machine_hard_spi_make_new,
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.protocol = &machine_hard_spi_p,
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.locals_dict = (mp_obj_dict_t *)&mp_machine_spi_locals_dict,
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};
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#endif /* MICROPY_PY_MACHINE_SPI */
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