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>
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#include "common-hal/usb_hid/Device.h"
#include "py/runtime.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/usb_hid/Device.h"
#include "genhdr/autogen_usb_descriptor.h"
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#include "tick.h"
#include "usb/class/hid/device/hiddf_generic.h"
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static uint32_t usb_hid_send_report(usb_hid_device_obj_t *self, uint8_t* report, uint8_t len) {
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int32_t status;
// Don't get stuck if USB fails in some way; timeout after a while.
uint64_t end_ticks = ticks_ms + 2000;
while (ticks_ms < end_ticks) {
status = usb_d_ep_get_status(self->endpoint, NULL);
if (status == USB_BUSY) {
continue;
}
if (status == USB_OK) {
break;
}
// Some error. Give up.
return status;
}
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// Copy the data only when endpoint is ready to send. The previous
// buffer load gets zero'd out when transaction completes, so if
// you copy before it's ready, only zeros will get sent.
// Prefix with a report id if one is supplied.
if (self->report_id > 0) {
self->report_buffer[0] = self->report_id;
memcpy(&(self->report_buffer[1]), report, len);
return hiddf_generic_write(self->report_buffer, len + 1);
} else {
memcpy(self->report_buffer, report, len);
return hiddf_generic_write(self->report_buffer, len);
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}
}
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) {
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mp_raise_ValueError_varg("Buffer incorrect size. Should be %d bytes.", self->report_length);
}
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int32_t status = usb_hid_send_report(self, report, len);
if (status != ERR_NONE) {
mp_raise_msg(&mp_type_OSError, status == USB_BUSY ? "USB Busy" : "USB Error");
}
}
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;
}
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void usb_hid_init() {
}
void usb_hid_reset() {
// We don't actually reset. We just set a report that is empty to prevent
// long keypresses and such.
uint8_t report[USB_HID_MAX_REPORT_LENGTH] = {0};
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for (size_t i = 0; i < USB_HID_NUM_DEVICES; i++) {
usb_hid_send_report(&usb_hid_devices[i], report, usb_hid_devices[i].report_length);
}
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}