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157 lines
3.6 KiB
157 lines
3.6 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_DATA_LEN 4
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#define HID_KEYBOARD_DATA_LEN 0
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#define HID_MOUSE_MAX_BUTTONS 4
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UpstreamPacketTypeDef* UpstreamHidPacket = NULL;
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UpstreamHidSendReportCallback ReportCallback = NULL;
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void Upstream_HID_GetNextReportReceiveCallback(UpstreamPacketTypeDef* receivedPacket);
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void Upstream_HID_DeInit(void)
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{
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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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HAL_StatusTypeDef Upstream_HID_GetNextReport(UpstreamHidSendReportCallback callback)
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{
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UpstreamPacketTypeDef* freePacket;
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InterfaceCommandClassTypeDef activeClass;
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activeClass = Upstream_StateMachine_CheckActiveClass();
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if ((activeClass != COMMAND_CLASS_HID_MOUSE)) //add classes here
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{
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UPSTREAM_STATEMACHINE_FREAKOUT;
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return HAL_ERROR;
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}
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//Just return if we already have an outstanding request
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if (ReportCallback != NULL)
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{
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return HAL_OK;
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}
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ReportCallback = callback;
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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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freePacket = Upstream_GetFreePacketImmediately();
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if (freePacket == NULL)
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{
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return HAL_ERROR;
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}
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freePacket->Length16 = UPSTREAM_PACKET_HEADER_LEN_16;
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freePacket->CommandClass = activeClass;
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freePacket->Command = COMMAND_HID_REPORT;
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if (Upstream_TransmitPacket(freePacket) == HAL_OK)
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{
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return Upstream_ReceivePacket(Upstream_HID_GetNextReportReceiveCallback);
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}
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//else:
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Upstream_ReleasePacket(freePacket);
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return HAL_ERROR;
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}
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void Upstream_HID_GetNextReportReceiveCallback(UpstreamPacketTypeDef* receivedPacket)
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{
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UpstreamHidSendReportCallback tempReportCallback;
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InterfaceCommandClassTypeDef activeClass;
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uint8_t dataLength = 0;
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uint8_t i;
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activeClass = Upstream_StateMachine_CheckActiveClass();
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if ((activeClass != COMMAND_CLASS_HID_MOUSE)) //add classes here
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{
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UPSTREAM_STATEMACHINE_FREAKOUT;
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return;
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}
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if ((UpstreamHidPacket != NULL) ||
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(ReportCallback == 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 (activeClass == COMMAND_CLASS_HID_MOUSE)
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{
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if (receivedPacket->Length16 != (UPSTREAM_PACKET_HEADER_LEN_16 + ((HID_MOUSE_DATA_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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receivedPacket->Data[0] &= ((1 << HID_MOUSE_MAX_BUTTONS) - 1); //Limit number of buttons received
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//Mouse sanity checks & stuff go here...
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dataLength = HID_MOUSE_DATA_LEN;
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}
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//Other HID classes go here...
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if (dataLength == 0)
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{
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UPSTREAM_SPI_FREAKOUT;
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return;
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}
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for (i = dataLength; i < HID_EPIN_SIZE; i++)
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{
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receivedPacket->Data[i] = 0; //Zero out unused bytes before we send report upstream
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}
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UpstreamHidPacket = receivedPacket; //Save packet so we can free it when upstream USB transaction is done
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tempReportCallback = ReportCallback;
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ReportCallback = NULL;
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tempReportCallback(receivedPacket->Data, HID_EPIN_SIZE);
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}
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