circuitpython/ports/atmel-samd/common-hal/usb_hid/Device.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 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 <string.h>
#include "py/nlr.h"
#include "common-hal/usb_hid/__init__.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/usb_hid/Device.h"
static void report_sent(udd_ep_status_t status, iram_size_t nb_sent,
udd_ep_id_t ep) {
UNUSED(status);
UNUSED(nb_sent);
for (uint8_t i = 0; i < 2; i++) {
if (ep == usb_hid_devices[i].endpoint) {
usb_hid_devices[i].transaction_ongoing = false;
return;
}
}
}
bool usb_hid_send_report(usb_hid_device_obj_t *self, uint8_t* report, uint8_t len) {
if (!self->enabled) {
return true;
}
// Wait for the previous transaction to finish. Shouldn't happen.
uint32_t timeout = 0xffff;
while (self->transaction_ongoing && timeout > 0) {
timeout--;
}
if (self->transaction_ongoing) {
return false;
}
memcpy(self->report_buffer, report, len);
// Disable interrupts to make sure we save the ongoing state before the
// report_sent interrupt.
common_hal_mcu_disable_interrupts();
bool ok = udd_ep_run(self->endpoint, false,
self->report_buffer, self->report_length, report_sent);
self->transaction_ongoing = ok;
common_hal_mcu_enable_interrupts();
return ok;
}
void common_hal_usb_hid_device_send_report(usb_hid_device_obj_t *self, uint8_t* report, uint8_t len) {
if (len != self->report_length) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
"Buffer incorrect size. Should be %d bytes.", self->report_length));
}
if (!self->enabled) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "USB Inactive"));
}
if (!usb_hid_send_report(self, report, len)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "USB Busy"));
}
}
uint8_t common_hal_usb_hid_device_get_usage_page(usb_hid_device_obj_t *self) {
return self->usage_page;
}
uint8_t common_hal_usb_hid_device_get_usage(usb_hid_device_obj_t *self) {
return self->usage;
}