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|
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
*
* 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 <stdarg.h>
#include <string.h>
#include "py/obj.h"
#include "py/objexcept.h"
#include "py/misc.h"
#include "py/mphal.h"
#include "py/runtime.h"
#include "shared-bindings/usb/core/__init__.h"
#include "shared-bindings/usb/core/Device.h"
//| """USB Core
//|
//| This is a subset of the PyUSB core module.
//| """
//|
//| class USBError(OSError):
//| """Catchall exception for USB related errors."""
//| ...
MP_DEFINE_USB_CORE_EXCEPTION(USBError, OSError)
NORETURN void mp_raise_usb_core_USBError(const compressed_string_t *fmt, ...) {
va_list argptr;
va_start(argptr,fmt);
mp_obj_t exception = mp_obj_new_exception_msg_vlist(&mp_type_usb_core_USBError, fmt, argptr);
va_end(argptr);
nlr_raise(exception);
}
//| class USBTimeoutError(USBError):
//| """Raised when a USB transfer times out."""
//| ...
//|
MP_DEFINE_USB_CORE_EXCEPTION(USBTimeoutError, usb_core_USBError)
NORETURN void mp_raise_usb_core_USBTimeoutError(void) {
mp_raise_type(&mp_type_usb_core_USBTimeoutError);
}
//| def find(find_all=False, *, idVendor=None, idProduct=None):
//| """Find the first device that matches the given requirements or, if
//| find_all is True, return a generator of all matching devices.
//|
//| Returns None if no device matches.
//| """
//|
typedef struct {
mp_obj_base_t base;
mp_int_t vid;
mp_int_t pid;
mp_int_t next_index;
} usb_core_devices_obj_t;
// This is an internal iterator type to use with find.
STATIC mp_obj_t _next_device(usb_core_devices_obj_t *iter) {
// Brute force check all possible device numbers for one that matches.
usb_core_device_obj_t temp_device;
for (size_t i = iter->next_index; i < 256; i++) {
if (!common_hal_usb_core_device_construct(&temp_device, i)) {
continue;
}
if (iter->vid < 0x10000 && iter->vid != common_hal_usb_core_device_get_idVendor(&temp_device)) {
continue;
}
if (iter->pid < 0x10000 && iter->pid != common_hal_usb_core_device_get_idProduct(&temp_device)) {
continue;
}
// We passed the filters. Now make a properly allocated object to
// return to the user.
usb_core_device_obj_t *self = m_new_obj(usb_core_device_obj_t);
self->base.type = &usb_core_device_type;
common_hal_usb_core_device_construct(self, i);
iter->next_index = i + 1;
return MP_OBJ_FROM_PTR(self);
}
// Iter is done.
iter->next_index = 256;
return mp_const_none;
}
STATIC mp_obj_t usb_core_devices_iternext(mp_obj_t self_in) {
mp_check_self(mp_obj_is_type(self_in, &usb_core_devices_type));
usb_core_devices_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_t device = _next_device(self);
if (device != mp_const_none) {
return device;
}
return MP_OBJ_STOP_ITERATION;
}
const mp_obj_type_t usb_core_devices_type = {
{ &mp_type_type },
.flags = MP_TYPE_FLAG_EXTENDED,
.name = MP_QSTR_USBDevices,
MP_TYPE_EXTENDED_FIELDS(
.getiter = mp_identity_getiter,
.iternext = usb_core_devices_iternext,
),
};
STATIC mp_obj_t usb_core_find(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_find_all, ARG_idVendor, ARG_idProduct };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_find_all, MP_ARG_BOOL, {.u_bool = false} },
{ MP_QSTR_idVendor, MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_idProduct, MP_ARG_OBJ, {.u_obj = mp_const_none} },
};
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);
const bool find_all = args[ARG_find_all].u_bool;
usb_core_devices_obj_t temp_iter;
temp_iter.base.type = &usb_core_devices_type;
temp_iter.next_index = 1;
if (!mp_obj_get_int_maybe(args[ARG_idVendor].u_obj, &temp_iter.vid)) {
temp_iter.vid = 0x10000;
}
if (!mp_obj_get_int_maybe(args[ARG_idProduct].u_obj, &temp_iter.pid)) {
temp_iter.pid = 0x10000;
}
if (find_all) {
// Copy the temp iter contents to a heap object before we return it.
// We could do this up front but GCC falsely detects that we may return
// the stack copy.
usb_core_devices_obj_t *iter = m_new_obj(usb_core_devices_obj_t);
memcpy(iter, &temp_iter, sizeof(usb_core_devices_obj_t));
return MP_OBJ_FROM_PTR(iter);
}
return _next_device(&temp_iter);
}
MP_DEFINE_CONST_FUN_OBJ_KW(usb_core_find_obj, 0, usb_core_find);
STATIC mp_rom_map_elem_t usb_core_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_usb_dot_core) },
// Functions
{ MP_ROM_QSTR(MP_QSTR_find), MP_OBJ_FROM_PTR(&usb_core_find_obj) },
// Classes
{ MP_ROM_QSTR(MP_QSTR_Device), MP_OBJ_FROM_PTR(&usb_core_device_type) },
// Errors
{ MP_ROM_QSTR(MP_QSTR_USBError), MP_OBJ_FROM_PTR(&mp_type_usb_core_USBError) },
{ MP_ROM_QSTR(MP_QSTR_USBTimeoutError), MP_OBJ_FROM_PTR(&mp_type_usb_core_USBTimeoutError) },
};
STATIC MP_DEFINE_CONST_DICT(usb_core_module_globals, usb_core_module_globals_table);
void usb_core_exception_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
mp_print_kind_t k = kind & ~PRINT_EXC_SUBCLASS;
bool is_subclass = kind & PRINT_EXC_SUBCLASS;
if (!is_subclass && (k == PRINT_EXC)) {
mp_print_str(print, qstr_str(MP_OBJ_QSTR_VALUE(usb_core_module_globals_table[0].value)));
mp_print_str(print, ".");
}
mp_obj_exception_print(print, o_in, kind);
}
const mp_obj_module_t usb_core_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&usb_core_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_usb_dot_core, usb_core_module, CIRCUITPY_USB_HOST);
|
