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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) 2016 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 <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include "ets_sys.h"
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#include "uart.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "modpyb.h"
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typedef struct _pyb_uart_obj_t {
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mp_obj_base_t base;
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uint8_t uart_id;
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} pyb_uart_obj_t;
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/******************************************************************************/
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// MicroPython bindings for UART
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STATIC void pyb_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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pyb_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "UART(%u)", self->uart_id);
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}
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STATIC void pyb_uart_init_helper(pyb_uart_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_bits, ARG_parity, ARG_stop };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_baudrate, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 9600} },
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{ MP_QSTR_bits, MP_ARG_INT, {.u_int = 8} },
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{ MP_QSTR_parity, MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_stop, MP_ARG_INT, {.u_int = 1} },
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{ MP_QSTR_tx, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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{ MP_QSTR_rx, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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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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// not implemented
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}
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STATIC mp_obj_t pyb_uart_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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mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
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// get uart id
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mp_int_t uart_id = mp_obj_get_int(args[0]);
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if (uart_id != 0 && uart_id != 1) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "UART(%d) does not exist", uart_id));
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}
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// create instance
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pyb_uart_obj_t *self = m_new_obj(pyb_uart_obj_t);
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self->base.type = &pyb_uart_type;
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self->uart_id = uart_id;
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if (n_args > 1 || n_kw > 0) {
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// init the peripheral
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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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pyb_uart_init_helper(self, n_args - 1, args + 1, &kw_args);
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}
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return MP_OBJ_FROM_PTR(self);
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}
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STATIC mp_obj_t pyb_uart_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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pyb_uart_init_helper(args[0], n_args - 1, args + 1, kw_args);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(pyb_uart_init_obj, 1, pyb_uart_init);
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STATIC const mp_rom_map_elem_t pyb_uart_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_uart_init_obj) },
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readall), MP_ROM_PTR(&mp_stream_readall_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
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{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(pyb_uart_locals_dict, pyb_uart_locals_dict_table);
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STATIC mp_uint_t pyb_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
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mp_not_implemented("reading from UART");
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}
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STATIC mp_uint_t pyb_uart_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) {
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pyb_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
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const byte *buf = buf_in;
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/* TODO implement non-blocking
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// wait to be able to write the first character
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if (!uart_tx_wait(self, timeout)) {
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*errcode = EAGAIN;
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return MP_STREAM_ERROR;
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}
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*/
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// write the data
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for (size_t i = 0; i < size; ++i) {
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uart_tx_one_char(self->uart_id, *buf++);
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}
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// return number of bytes written
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return size;
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}
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STATIC mp_uint_t pyb_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint_t arg, int *errcode) {
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*errcode = EINVAL;
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return MP_STREAM_ERROR;
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}
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STATIC const mp_stream_p_t uart_stream_p = {
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.read = pyb_uart_read,
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.write = pyb_uart_write,
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.ioctl = pyb_uart_ioctl,
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.is_text = false,
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};
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const mp_obj_type_t pyb_uart_type = {
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{ &mp_type_type },
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.name = MP_QSTR_UART,
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.print = pyb_uart_print,
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.make_new = pyb_uart_make_new,
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.getiter = mp_identity,
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.iternext = mp_stream_unbuffered_iter,
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.stream_p = &uart_stream_p,
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.locals_dict = (mp_obj_dict_t*)&pyb_uart_locals_dict,
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};
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Damien George