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275 lines
10 KiB
C
Executable File
275 lines
10 KiB
C
Executable File
/*
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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) 2018 SummerGift <zhangyuan@rt-thread.com>
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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 <string.h>
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "py/mperrno.h"
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#include "py/stream.h"
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#include <stdarg.h>
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#include "machine_uart.h"
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#include "rtdevice.h"
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#ifdef MICROPYTHON_USING_MACHINE_UART
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#ifndef RT_USING_SERIAL
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#error "Please define the RT_USING_SERIAL on 'rtconfig.h'"
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#endif
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typedef struct _machine_uart_obj_t {
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mp_obj_base_t base;
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struct rt_serial_device *uart_device;
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}machine_uart_obj_t;
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STATIC void machine_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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machine_uart_obj_t *self = (machine_uart_obj_t*) self_in;
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mp_printf(print, "uart( device port : %s,baud_rate = %d, data_bits = %d, parity = %d, stop_bits = %d )",
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self->uart_device->parent.parent.name,
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self->uart_device->config.baud_rate,
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self->uart_device->config.data_bits,
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self->uart_device->config.parity,
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self->uart_device->config.stop_bits);
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}
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STATIC mp_obj_t machine_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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char uart_dev_name[RT_NAME_MAX];
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snprintf(uart_dev_name, sizeof(uart_dev_name), "uart%d", mp_obj_get_int(args[0]));
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struct rt_serial_device *rt_serial_device = (struct rt_serial_device *) rt_device_find(uart_dev_name);
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if (rt_serial_device == RT_NULL || rt_serial_device->parent.type != RT_Device_Class_Char) {
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mp_printf(&mp_plat_print, "ERROR: UART device %s not found!\n", uart_dev_name);
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "UART(%s) doesn't exist", uart_dev_name));
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}
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rt_err_t result;
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result = rt_device_open((rt_device_t)rt_serial_device, RT_DEVICE_OFLAG_RDWR | RT_DEVICE_FLAG_INT_RX );
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if (result != RT_EOK)
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{
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mp_printf(&mp_plat_print, "ERROR: UART device %s can't open!\n", uart_dev_name);
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "UART(%s) can't open", uart_dev_name));
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}
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// create new uart object
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machine_uart_obj_t *self = m_new_obj(machine_uart_obj_t);
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self->base.type = &machine_uart_type;
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self->uart_device = rt_serial_device;
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return (mp_obj_t) self;
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}
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/// \method init(baudrate, bits=8, parity=None, stop=1, *, timeout=1000, timeout_char=0, flow=0, read_buf_len=64)
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///
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/// Initialise the UART bus with the given parameters:
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///
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/// - `baudrate` is the clock rate.
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/// - `bits` is the number of bits per byte, 7, 8 or 9.
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/// - `parity` is the parity, `None`, 0 (even) or 1 (odd).
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/// - `stop` is the number of stop bits, 1 or 2.
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/// - `timeout` is the timeout in milliseconds to wait for the first character.
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/// - `timeout_char` is the timeout in milliseconds to wait between characters.
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/// - `flow` is RTS | CTS where RTS == 256, CTS == 512
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/// - `read_buf_len` is the character length of the read buffer (0 to disable).
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///
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STATIC mp_obj_t machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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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_flow, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} }, // rt-thread does not support
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{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1000} },
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{ MP_QSTR_timeout_char, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
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{ MP_QSTR_read_buf_len, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 64} },
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};
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// parse args
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struct {
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mp_arg_val_t baudrate, bits, parity, stop, flow, timeout, timeout_char, read_buf_len;
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} args;
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mp_arg_parse_all(n_args, pos_args, kw_args,
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MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);
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// set the UART configuration values
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struct rt_serial_device *uart_p = self->uart_device;
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struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
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// baudrate
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config.baud_rate = args.baudrate.u_int;
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// parity
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mp_int_t bits = args.bits.u_int;
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if (args.parity.u_obj == mp_const_none) {
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config.parity = PARITY_NONE;
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} else {
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mp_int_t parity = mp_obj_get_int(args.parity.u_obj);
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config.parity = (parity & 1) ? PARITY_ODD : PARITY_EVEN;
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//bits += 1; // STs convention has bits including parity, not all mcu
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}
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// number of bits
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if (bits == 8) {
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config.data_bits = DATA_BITS_8;
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} else if (bits == 9) {
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config.data_bits = DATA_BITS_9;
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} else if (bits == 7) {
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config.data_bits = DATA_BITS_7;
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} else {
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mp_raise_ValueError("unsupported combination of bits and parity");
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}
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// stop bits
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switch (args.stop.u_int) {
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case 1: config.stop_bits = STOP_BITS_1; break;
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default: config.stop_bits = STOP_BITS_2; break;
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}
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//buffer size
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#if defined(RT_USING_SERIAL_V1)
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config.bufsz = args.read_buf_len.u_int;
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#elif defined(RT_USING_SERIAL_V2)
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config.rx_bufsz = args.read_buf_len.u_int;
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config.tx_bufsz = args.read_buf_len.u_int;
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#endif
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rt_device_control((struct rt_device *) uart_p, RT_DEVICE_CTRL_CONFIG, &config);
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return mp_const_none;
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}
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STATIC mp_obj_t machine_uart_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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return machine_uart_init_helper(args[0], n_args - 1, args + 1, kw_args);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_uart_init_obj, 1, machine_uart_init);
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STATIC mp_obj_t machine_uart_deinit(mp_obj_t self_in) {
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_uart_deinit_obj, machine_uart_deinit);
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#define RETRY_TIMES 500
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STATIC mp_obj_t machine_uart_writechar(mp_obj_t self_in, mp_obj_t char_in) {
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machine_uart_obj_t *self = self_in;
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uint16_t data = mp_obj_get_int(char_in);
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rt_size_t len = 0;
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rt_uint32_t timeout = 0;
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do
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{
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len = rt_device_write((struct rt_device *)(self->uart_device), 0, &data, 1);
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timeout++;
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}
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while (len != 1 && timeout < RETRY_TIMES);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(machine_uart_writechar_obj, machine_uart_writechar);
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#define UART_RX_EVENT (1 << 0)
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static struct rt_event event;
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STATIC mp_obj_t machine_uart_readchar(mp_obj_t self_in) {
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machine_uart_obj_t *self = self_in;
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rt_uint32_t e;
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rt_uint8_t ch;
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while (rt_device_read((struct rt_device *)(self->uart_device), 0, &ch, 1) != 1) {
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rt_event_recv(&event, UART_RX_EVENT, RT_EVENT_FLAG_AND |
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RT_EVENT_FLAG_CLEAR, RT_WAITING_FOREVER, &e);
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}
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return MP_OBJ_NEW_SMALL_INT(ch);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_uart_readchar_obj, machine_uart_readchar);
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STATIC const mp_rom_map_elem_t machine_uart_locals_dict_table[] = {
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// instance methods
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{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_uart_init_obj) },
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_uart_deinit_obj) },
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// { MP_ROM_QSTR(MP_QSTR_any), MP_ROM_PTR(&machine_uart_any_obj) },
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/// \method read([nbytes])
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
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/// \method readline()
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{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj)},
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/// \method readinto(buf[, nbytes])
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{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
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/// \method write(buf)
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{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
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{ MP_ROM_QSTR(MP_QSTR_writechar), MP_ROM_PTR(&machine_uart_writechar_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readchar), MP_ROM_PTR(&machine_uart_readchar_obj) },
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// { MP_ROM_QSTR(MP_QSTR_sendbreak), MP_ROM_PTR(&pyb_uart_sendbreak_obj) },
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// class constants
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// { MP_ROM_QSTR(MP_QSTR_RTS), MP_ROM_INT(UART_HWCONTROL_RTS) },
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// { MP_ROM_QSTR(MP_QSTR_CTS), MP_ROM_INT(UART_HWCONTROL_CTS) },
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};
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STATIC MP_DEFINE_CONST_DICT(machine_uart_locals_dict, machine_uart_locals_dict_table);
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STATIC mp_uint_t machine_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
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machine_uart_obj_t *self = self_in;
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byte *buf = buf_in;
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//TODO dfs sync read
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//MP_RTT_NOT_IMPL_PRINT;
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return rt_device_read((struct rt_device *)(self->uart_device), -1, buf, size);
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}
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STATIC mp_uint_t machine_uart_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) {
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machine_uart_obj_t *self = self_in;
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const byte *buf = buf_in;
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//TODO dfs sync write
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//MP_RTT_NOT_IMPL_PRINT;
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return rt_device_write((struct rt_device *)(self->uart_device), -1, buf, size);
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}
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STATIC mp_uint_t machine_uart_ioctl(mp_obj_t obj, mp_uint_t request, uintptr_t arg, int *errcode) {
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return NULL;
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}
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STATIC const mp_stream_p_t uart_stream_p = {
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.read = machine_uart_read,
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.write = machine_uart_write,
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.ioctl = machine_uart_ioctl,
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.is_text = false,
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};
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const mp_obj_type_t machine_uart_type = {
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{ &mp_type_type },
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.name = MP_QSTR_UART,
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.print = machine_uart_print,
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.make_new = machine_uart_make_new,
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.getiter = mp_identity_getiter,
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.iternext = mp_stream_unbuffered_iter,
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.protocol = &uart_stream_p,
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.locals_dict = (mp_obj_dict_t*)&machine_uart_locals_dict,
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};
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#endif // MICROPYTHON_USING_MACHINE_UART
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