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Copy pathmodtermios.c
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156 lines (136 loc) · 5.71 KB
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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Paul Sokolovsky
*
* 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 <sys/types.h>
#include <termios.h>
#include <unistd.h>
#include <errno.h>
#include "py/nlr.h"
#include "py/objlist.h"
#include "py/runtime.h"
#define RAISE_ERRNO(err_flag, error_val) \
{ if (err_flag == -1) \
{ nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(error_val))); } }
STATIC mp_obj_t mod_termios_tcgetattr(mp_obj_t fd_in) {
struct termios term;
int fd = mp_obj_get_int(fd_in);
int res = tcgetattr(fd, &term);
RAISE_ERRNO(res, errno);
mp_obj_list_t *r = MP_OBJ_TO_PTR(mp_obj_new_list(7, NULL));
r->items[0] = MP_OBJ_NEW_SMALL_INT(term.c_iflag);
r->items[1] = MP_OBJ_NEW_SMALL_INT(term.c_oflag);
r->items[2] = MP_OBJ_NEW_SMALL_INT(term.c_cflag);
r->items[3] = MP_OBJ_NEW_SMALL_INT(term.c_lflag);
r->items[4] = MP_OBJ_NEW_SMALL_INT(cfgetispeed(&term));
r->items[5] = MP_OBJ_NEW_SMALL_INT(cfgetospeed(&term));
mp_obj_list_t *cc = MP_OBJ_TO_PTR(mp_obj_new_list(NCCS, NULL));
r->items[6] = MP_OBJ_FROM_PTR(cc);
for (int i = 0; i < NCCS; i++) {
if (i == VMIN || i == VTIME) {
cc->items[i] = MP_OBJ_NEW_SMALL_INT(term.c_cc[i]);
} else {
// https://docs.python.org/3/library/termios.html says value is *string*,
// but no way unicode chars could be there, if c_cc is defined to be a
// a "char". But it's type is actually cc_t, which can be anything.
// TODO: For now, we still deal with it like that.
cc->items[i] = mp_obj_new_bytes((byte*)&term.c_cc[i], 1);
}
}
return MP_OBJ_FROM_PTR(r);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_termios_tcgetattr_obj, mod_termios_tcgetattr);
STATIC mp_obj_t mod_termios_tcsetattr(mp_obj_t fd_in, mp_obj_t when_in, mp_obj_t attrs_in) {
struct termios term;
int fd = mp_obj_get_int(fd_in);
int when = mp_obj_get_int(when_in);
if (when == 0) {
// We don't export TCSANOW and friends to save on code space. Then
// common lazy sense says that passing 0 should be godo enough, and
// it is e.g. for glibc. But for other libc's it's not, so set just
// treat 0 as defauling to TCSANOW.
when = TCSANOW;
}
assert(MP_OBJ_IS_TYPE(attrs_in, &mp_type_list));
mp_obj_list_t *attrs = MP_OBJ_TO_PTR(attrs_in);
term.c_iflag = mp_obj_get_int(attrs->items[0]);
term.c_oflag = mp_obj_get_int(attrs->items[1]);
term.c_cflag = mp_obj_get_int(attrs->items[2]);
term.c_lflag = mp_obj_get_int(attrs->items[3]);
mp_obj_list_t *cc = MP_OBJ_TO_PTR(attrs->items[6]);
for (int i = 0; i < NCCS; i++) {
if (i == VMIN || i == VTIME) {
term.c_cc[i] = mp_obj_get_int(cc->items[i]);
} else {
mp_uint_t len;
term.c_cc[i] = *mp_obj_str_get_data(cc->items[i], &len);
}
}
int res = cfsetispeed(&term, mp_obj_get_int(attrs->items[4]));
RAISE_ERRNO(res, errno);
res = cfsetispeed(&term, mp_obj_get_int(attrs->items[5]));
RAISE_ERRNO(res, errno);
res = tcsetattr(fd, when, &term);
RAISE_ERRNO(res, errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_termios_tcsetattr_obj, mod_termios_tcsetattr);
STATIC mp_obj_t mod_termios_setraw(mp_obj_t fd_in) {
struct termios term;
int fd = mp_obj_get_int(fd_in);
int res = tcgetattr(fd, &term);
RAISE_ERRNO(res, errno);
term.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
term.c_oflag = 0;
term.c_cflag = (term.c_cflag & ~(CSIZE | PARENB)) | CS8;
term.c_lflag = 0;
term.c_cc[VMIN] = 1;
term.c_cc[VTIME] = 0;
res = tcsetattr(fd, TCSAFLUSH, &term);
RAISE_ERRNO(res, errno);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_termios_setraw_obj, mod_termios_setraw);
STATIC const mp_rom_map_elem_t mp_module_termios_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_termios) },
{ MP_ROM_QSTR(MP_QSTR_tcgetattr), MP_ROM_PTR(&mod_termios_tcgetattr_obj) },
{ MP_ROM_QSTR(MP_QSTR_tcsetattr), MP_ROM_PTR(&mod_termios_tcsetattr_obj) },
{ MP_ROM_QSTR(MP_QSTR_setraw), MP_ROM_PTR(&mod_termios_setraw_obj) },
#define C(name) { MP_ROM_QSTR(MP_QSTR_ ## name), MP_ROM_INT(name) }
C(TCSANOW),
C(B9600),
#ifdef B57600
C(B57600),
#endif
#ifdef B115200
C(B115200),
#endif
#undef C
};
STATIC MP_DEFINE_CONST_DICT(mp_module_termios_globals, mp_module_termios_globals_table);
const mp_obj_module_t mp_module_termios = {
.base = { &mp_type_module },
.name = MP_QSTR_termios,
.globals = (mp_obj_dict_t*)&mp_module_termios_globals,
};