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82 lines
2.1 KiB
82 lines
2.1 KiB
/*
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* downstream_hid.c
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*
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* Created on: Apr 10, 2016
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* Author: Robert Fisk
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include "downstream_hid.h"
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#include "downstream_statemachine.h"
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#include "usbh_hid.h"
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#define HID_REPORT_DATA_LEN 8
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#define HID_MOUSE_DATA_LEN 3
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#define HID_KEYBOARD_DATA_LEN 0
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extern USBH_HandleTypeDef hUsbHostFS; //Hard-link ourselves to usb_host.c
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extern InterfaceCommandClassTypeDef ConfiguredDeviceClass; //Do a cheap hard-link to downstream_statemachine.c, rather than keep a duplicate here
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InterfaceCommandClassTypeDef Downstream_HID_ApproveConnectedDevice(void)
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{
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HID_HandleTypeDef* HID_Handle = (HID_HandleTypeDef*)hUsbHostFS.pActiveClass->pData;
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if (HID_Handle->Protocol == HID_MOUSE_BOOT_CODE)
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{
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if ((HID_Handle->length >= HID_MOUSE_DATA_LEN) && (HID_Handle->length <= HID_REPORT_DATA_LEN))
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{
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return COMMAND_CLASS_HID_MOUSE;
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}
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}
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return COMMAND_CLASS_INTERFACE; //fail
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}
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void Downstream_HID_PacketProcessor(DownstreamPacketTypeDef* receivedPacket)
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{
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if (receivedPacket->Command != COMMAND_HID_REPORT)
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{
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Downstream_PacketProcessor_FreakOut();
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return;
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}
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if (USBH_HID_GetInterruptReport(&hUsbHostFS,
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Downstream_HID_InterruptReportCallback,
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receivedPacket) != HAL_OK) //Don't free the packet, USBH_HID will use it then return it to InterruptReportCallback below
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{
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Downstream_PacketProcessor_FreakOut();
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}
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}
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void Downstream_HID_InterruptReportCallback(DownstreamPacketTypeDef* packetToSend)
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{
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if (ConfiguredDeviceClass == COMMAND_CLASS_HID_MOUSE)
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{
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packetToSend->Length16 = ((HID_MOUSE_DATA_LEN + 1) / 2) + DOWNSTREAM_PACKET_HEADER_LEN_16;
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}
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//else if...
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else
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{
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Downstream_PacketProcessor_FreakOut();
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return;
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}
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Downstream_PacketProcessor_ClassReply(packetToSend);
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}
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