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118 lines
2.6 KiB
118 lines
2.6 KiB
/*
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* upstream_hid.c
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*
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* Created on: Jan 16, 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 "upstream_hid.h"
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#include "upstream_spi.h"
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#include "upstream_interface_def.h"
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#include "usbd_hid.h"
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#define HID_MOUSE_REPORT_LEN 4
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InterfaceCommandClassTypeDef ActiveHidClass = COMMAND_CLASS_INTERFACE;
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UpstreamPacketTypeDef* UpstreamHidPacket = NULL;
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void Upstream_HID_GetNextReportReceiveCallback(UpstreamPacketTypeDef* receivedPacket);
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void Upstream_HID_Init(InterfaceCommandClassTypeDef newClass)
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{
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if ((newClass != COMMAND_CLASS_HID_MOUSE)) //add classes here
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{
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UPSTREAM_SPI_FREAKOUT;
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return;
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}
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if (UpstreamHidPacket != NULL)
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{
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UPSTREAM_SPI_FREAKOUT;
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return;
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}
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ActiveHidClass = newClass;
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}
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void Upstream_HID_DeInit(void)
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{
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ActiveHidClass = COMMAND_CLASS_INTERFACE;
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if (UpstreamHidPacket != NULL)
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{
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Upstream_ReleasePacket(UpstreamHidPacket);
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UpstreamHidPacket = NULL;
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}
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}
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void Upstream_HID_GetNextReport(UpstreamHidSendReportCallback callback)
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{
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if ((ActiveHidClass != COMMAND_CLASS_HID_MOUSE)) //add classes here
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{
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UPSTREAM_SPI_FREAKOUT;
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return;
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}
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//Release packet used for last transaction (if any)
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if (UpstreamHidPacket != NULL)
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{
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Upstream_ReleasePacket(UpstreamHidPacket);
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UpstreamHidPacket = NULL;
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}
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//Get next packet
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Upstream_SetExpectedReceivedCommand(ActiveHidClass, COMMAND_HID_REPORT);
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Upstream_ReceivePacket(Upstream_HID_GetNextReportReceiveCallback);
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}
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void Upstream_HID_GetNextReportReceiveCallback(UpstreamPacketTypeDef* receivedPacket)
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{
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uint8_t reportLength;
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if (UpstreamHidPacket != NULL)
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{
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UPSTREAM_SPI_FREAKOUT;
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return;
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}
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if (receivedPacket == NULL)
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{
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return; //Just give up...
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}
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if (ActiveHidClass == COMMAND_CLASS_HID_MOUSE)
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{
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if (receivedPacket->Length16 != (UPSTREAM_PACKET_HEADER_LEN_16 + ((HID_MOUSE_REPORT_LEN + 1) / 2)))
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{
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UPSTREAM_SPI_FREAKOUT;
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return;
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}
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//Mouse sanity checks & stuff go here...
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reportLength = HID_MOUSE_REPORT_LEN;
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}
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//Other HID classes go here...
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UpstreamHidPacket = receivedPacket; //Save packet so we can free it when upstream USB transaction is done
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USBD_HID_SendReport(receivedPacket->Data, reportLength);
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}
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