Commit 1a0a323c authored by Damien George's avatar Damien George Committed by Paul Sokolovsky
Browse files

esp8266: Add initial implementation of machine.UART.

Currently UART(0) and UART(1) are exposed and only uart.write works.
parent 4e51a303
......@@ -66,6 +66,7 @@ SRC_C = \
modpybpwm.c \
modpybrtc.c \
modpybadc.c \
modpybuart.c \
modpybi2c.c \
modpybspi.c \
modesp.c \
......
......@@ -137,6 +137,7 @@ SECTIONS
*modpybpwm.o(.literal*, .text*)
*modpybrtc.o(.literal*, .text*)
*modpybadc.o(.literal*, .text*)
*modpybuart.o(.literal*, .text*)
*modpybi2c.o(.literal*, .text*)
*modpybspi.o(.literal*, .text*)
*modesp.o(.literal* .text*)
......
......@@ -158,6 +158,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&pyb_pin_type) },
{ MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&pyb_pwm_type) },
{ MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&pyb_adc_type) },
{ MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&pyb_uart_type) },
{ MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&pyb_i2c_type) },
{ MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&pyb_spi_type) },
};
......
......@@ -2,6 +2,7 @@ extern const mp_obj_type_t pyb_pin_type;
extern const mp_obj_type_t pyb_pwm_type;
extern const mp_obj_type_t pyb_adc_type;
extern const mp_obj_type_t pyb_rtc_type;
extern const mp_obj_type_t pyb_uart_type;
extern const mp_obj_type_t pyb_i2c_type;
extern const mp_obj_type_t pyb_spi_type;
......
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Damien P. George
*
* 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 <stdio.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include "ets_sys.h"
#include "uart.h"
#include "py/runtime.h"
#include "py/stream.h"
#include "modpyb.h"
typedef struct _pyb_uart_obj_t {
mp_obj_base_t base;
uint8_t uart_id;
} pyb_uart_obj_t;
/******************************************************************************/
// MicroPython bindings for UART
STATIC void pyb_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pyb_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_printf(print, "UART(%u)", self->uart_id);
}
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) {
/*
enum { ARG_baudrate, ARG_bits, ARG_parity, ARG_stop };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_baudrate, MP_ARG_REQUIRED | MP_ARG_INT, {.u_int = 9600} },
{ MP_QSTR_bits, MP_ARG_INT, {.u_int = 8} },
{ MP_QSTR_parity, MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_stop, MP_ARG_INT, {.u_int = 1} },
{ MP_QSTR_tx, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_rx, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
*/
// not implemented
}
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) {
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
// get uart id
mp_int_t uart_id = mp_obj_get_int(args[0]);
if (uart_id != 0 && uart_id != 1) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "UART(%d) does not exist", uart_id));
}
// create instance
pyb_uart_obj_t *self = m_new_obj(pyb_uart_obj_t);
self->base.type = &pyb_uart_type;
self->uart_id = uart_id;
if (n_args > 1 || n_kw > 0) {
// init the peripheral
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
pyb_uart_init_helper(self, n_args - 1, args + 1, &kw_args);
}
return MP_OBJ_FROM_PTR(self);
}
STATIC mp_obj_t pyb_uart_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
pyb_uart_init_helper(args[0], n_args - 1, args + 1, kw_args);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(pyb_uart_init_obj, 1, pyb_uart_init);
STATIC const mp_rom_map_elem_t pyb_uart_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_uart_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readall), MP_ROM_PTR(&mp_stream_readall_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
};
STATIC MP_DEFINE_CONST_DICT(pyb_uart_locals_dict, pyb_uart_locals_dict_table);
STATIC mp_uint_t pyb_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
mp_not_implemented("reading from UART");
}
STATIC mp_uint_t pyb_uart_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) {
pyb_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
const byte *buf = buf_in;
/* TODO implement non-blocking
// wait to be able to write the first character
if (!uart_tx_wait(self, timeout)) {
*errcode = EAGAIN;
return MP_STREAM_ERROR;
}
*/
// write the data
for (size_t i = 0; i < size; ++i) {
uart_tx_one_char(self->uart_id, *buf++);
}
// return number of bytes written
return size;
}
STATIC mp_uint_t pyb_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint_t arg, int *errcode) {
*errcode = EINVAL;
return MP_STREAM_ERROR;
}
STATIC const mp_stream_p_t uart_stream_p = {
.read = pyb_uart_read,
.write = pyb_uart_write,
.ioctl = pyb_uart_ioctl,
.is_text = false,
};
const mp_obj_type_t pyb_uart_type = {
{ &mp_type_type },
.name = MP_QSTR_UART,
.print = pyb_uart_print,
.make_new = pyb_uart_make_new,
.getiter = mp_identity,
.iternext = mp_stream_unbuffered_iter,
.stream_p = &uart_stream_p,
.locals_dict = (mp_obj_dict_t*)&pyb_uart_locals_dict,
};
......@@ -150,6 +150,10 @@ Q(memory)
Q(ADC)
Q(read)
// UART
Q(UART)
Q(init)
// I2C
Q(I2C)
Q(init)
......
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