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trezor-firmware/embed/extmod/modtrezorio/modtrezorio-poll.h

120 lines
4.6 KiB
C

/*
* This file is part of the TREZOR project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <unistd.h>
#include "embed/extmod/trezorobj.h"
#include "usb.h"
#define TOUCH_IFACE (255)
#define POLL_READ (0x0000)
#define POLL_WRITE (0x0100)
#define CHECK_PARAM_RANGE(value, minimum, maximum) \
if (value < minimum || value > maximum) { \
mp_raise_ValueError(#value " is out of range"); \
}
/// def poll(ifaces: Iterable[int], list_ref: List, timeout_us: int) -> bool:
/// '''
/// Wait until one of `ifaces` is ready to read or write (using masks
// `io.POLL_READ` and `io.POLL_WRITE`) and assign the result into
/// `list_ref`:
///
/// `list_ref[0]` - the interface number, including the mask
/// `list_ref[1]` - for touch event, tuple of (event_type, x_position, y_position)
/// - for USB read event, received bytes
///
/// If timeout occurs, False is returned, True otherwise.
/// '''
STATIC mp_obj_t mod_trezorio_poll(mp_obj_t ifaces, mp_obj_t list_ref, mp_obj_t timeout_us) {
mp_obj_list_t *ret = MP_OBJ_TO_PTR(list_ref);
if (!MP_OBJ_IS_TYPE(list_ref, &mp_type_list) || ret->len < 2) {
mp_raise_TypeError("invalid list_ref");
}
const mp_uint_t timeout = trezor_obj_get_uint(timeout_us);
const mp_uint_t deadline = mp_hal_ticks_us() + timeout;
mp_obj_iter_buf_t iterbuf;
for (;;) {
mp_obj_t iter = mp_getiter(ifaces, &iterbuf);
mp_obj_t item;
while ((item = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
const mp_uint_t i = trezor_obj_get_uint(item);
const mp_uint_t iface = i & 0x00FF;
const mp_uint_t mode = i & 0xFF00;
if (iface == TOUCH_IFACE) {
const uint32_t evt = touch_read();
if (evt) {
mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL));
tuple->items[0] = MP_OBJ_NEW_SMALL_INT((evt >> 24) & 0xFFU); // event type
tuple->items[1] = MP_OBJ_NEW_SMALL_INT((evt >> 12) & 0xFFFU); // x position
tuple->items[2] = MP_OBJ_NEW_SMALL_INT(evt & 0xFFFU); // y position
ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
ret->items[1] = MP_OBJ_FROM_PTR(tuple);
return mp_const_true;
}
} else
if (mode == POLL_READ) {
if (sectrue == usb_hid_can_read(iface)) {
uint8_t buf[64];
int len = usb_hid_read(iface, buf, sizeof(buf));
if (len > 0) {
ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
ret->items[1] = mp_obj_new_bytes(buf, len);
return mp_const_true;
}
} else if (sectrue == usb_webusb_can_read(iface)) {
uint8_t buf[64];
int len = usb_webusb_read(iface, buf, sizeof(buf));
if (len > 0) {
ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
ret->items[1] = mp_obj_new_bytes(buf, len);
return mp_const_true;
}
}
} else
if (mode == POLL_WRITE) {
if (sectrue == usb_hid_can_write(iface)) {
ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
ret->items[1] = mp_const_none;
return mp_const_true;
} else if (sectrue == usb_webusb_can_write(iface)) {
ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
ret->items[1] = mp_const_none;
return mp_const_true;
}
}
}
if (mp_hal_ticks_us() >= deadline) {
break;
} else {
MICROPY_EVENT_POLL_HOOK
}
}
return mp_const_false;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_trezorio_poll_obj, mod_trezorio_poll);