Commit 6198289b authored by Dean Camera's avatar Dean Camera
Browse files

Added new GenericHIDHost demo.

Corrections to the KeyboardHost and MouseHost demos' pipe handling to freeze and unfreeze the data pipes at the point of use.
parent 74496a94
/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
*
* USB Device Configuration Descriptor processing routines, to determine the correct pipe configurations
* needed to communication with an attached USB device. Descriptors are special computer-readable structures
* which the host requests upon device enumeration, to determine the device's capabilities and functions.
*/
#include "ConfigDescriptor.h"
/** Reads and processes an attached device's descriptors, to determine compatibility and pipe configurations. This
* routine will read in the entire configuration descriptor, and configure the hosts pipes to correctly communicate
* with compatible devices.
*
* This routine searches for a HID interface descriptor containing at least one Interrupt type IN endpoint.
*
* \return An error code from the GenericHIDHost_GetConfigDescriptorDataCodes_t enum.
*/
uint8_t ProcessConfigurationDescriptor(void)
{
uint8_t* ConfigDescriptorData;
uint16_t ConfigDescriptorSize;
uint8_t FoundEndpoints = 0;
/* Get Configuration Descriptor size from the device */
if (USB_Host_GetDeviceConfigDescriptor(&ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful)
return ControlError;
/* Ensure that the Configuration Descriptor isn't too large */
if (ConfigDescriptorSize > MAX_CONFIG_DESCRIPTOR_SIZE)
return DescriptorTooLarge;
/* Allocate enough memory for the entire config descriptor */
ConfigDescriptorData = alloca(ConfigDescriptorSize);
/* Retrieve the entire configuration descriptor into the allocated buffer */
USB_Host_GetDeviceConfigDescriptor(&ConfigDescriptorSize, ConfigDescriptorData);
/* Validate returned data - ensure first entry is a configuration header descriptor */
if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)
return InvalidConfigDataReturned;
/* Get the HID interface from the configuration descriptor */
if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextHIDInterface))
{
/* Descriptor not found, error out */
return NoHIDInterfaceFound;
}
while (FoundEndpoints != ((1 << HID_DATA_IN_PIPE) | (1 << HID_DATA_OUT_PIPE)))
{
/* Get the next HID interface's data endpoint descriptor */
if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,
NextInterfaceHIDDataEndpoint))
{
/* Not all HID devices have an OUT endpoint - if we've reached the end of the HID descriptor
* but only found the mandatory IN endpoint, it's safe to continue with the device enumeration */
if (FoundEndpoints == (1 << HID_DATA_IN_PIPE))
break;
/* Descriptor not found, error out */
return NoEndpointFound;
}
/* Retrieve the endpoint address from the endpoint descriptor */
USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);
/* If the endpoint is a IN type endpoint */
if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
{
/* Configure the HID data IN pipe */
Pipe_ConfigurePipe(HID_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
Pipe_SetInfiniteINRequests();
#if defined(INTERRUPT_DATA_PIPE)
Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
/* Enable the pipe IN interrupt for the data pipe */
USB_INT_Enable(PIPE_INT_IN);
#endif
FoundEndpoints |= (1 << HID_DATA_IN_PIPE);
}
else
{
/* Configure the HID data OUT pipe */
Pipe_ConfigurePipe(HID_DATA_OUT_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT,
EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
FoundEndpoints |= (1 << HID_DATA_OUT_PIPE);
}
}
/* Valid data found, return success */
return SuccessfulConfigRead;
}
/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
* configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
* descriptor processing if an incompatible descriptor configuration is found.
*
* This comparator searches for the next Interface descriptor of the correct HID Class value.
*
* \return A value from the DSEARCH_Return_ErrorCodes_t enum
*/
DESCRIPTOR_COMPARATOR(NextHIDInterface)
{
/* Determine if the current descriptor is an interface descriptor */
if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
{
/* Check the HID descriptor class and protocol, break out if correct class/protocol interface found */
if (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == HID_CLASS)
{
/* Indicate that the descriptor being searched for has been found */
return Descriptor_Search_Found;
}
}
/* Current descriptor does not match what this comparator is looking for */
return Descriptor_Search_NotFound;
}
/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
* configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
* descriptor processing if an incompatible descriptor configuration is found.
*
* This comparator searches for the next Endpoint descriptor inside the current interface descriptor,
* aborting the search if another interface descriptor is found before the required endpoint.
*
* \return A value from the DSEARCH_Return_ErrorCodes_t enum
*/
DESCRIPTOR_COMPARATOR(NextInterfaceHIDDataEndpoint)
{
/* Determine the type of the current descriptor */
if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint)
{
/* Indicate that the descriptor being searched for has been found */
return Descriptor_Search_Found;
}
else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface)
{
/* Indicate that the search has failed prematurely and should be aborted */
return Descriptor_Search_Fail;
}
/* Current descriptor does not match what this comparator is looking for */
return Descriptor_Search_NotFound;
}
/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
*
* Header file for ConfigDescriptor.c.
*/
#ifndef _CONFIGDESCRIPTOR_H_
#define _CONFIGDESCRIPTOR_H_
/* Includes: */
#include <LUFA/Drivers/USB/USB.h> // USB Functionality
#include <LUFA/Drivers/USB/Class/ConfigDescriptor.h> // Configuration Descriptor Parser
#include "GenericHIDHost.h"
/* Macros: */
/** Interface Class value for the Human Interface Device class */
#define HID_CLASS 0x03
/** Maximum size of a device configuration descriptor which can be processed by the host, in bytes */
#define MAX_CONFIG_DESCRIPTOR_SIZE 512
/* Enums: */
/** Enum for the possible return codes of the ProcessConfigurationDescriptor() function. */
enum GenericHIDHost_GetConfigDescriptorDataCodes_t
{
SuccessfulConfigRead = 0, /**< Configuration Descriptor was processed successfully */
ControlError = 1, /**< A control request to the device failed to complete successfully */
DescriptorTooLarge = 2, /**< The device's Configuration Descriptor is too large to process */
InvalidConfigDataReturned = 3, /**< The device returned an invalid Configuration Descriptor */
NoHIDInterfaceFound = 4, /**< A compatible HID interface was not found in the device's Configuration Descriptor */
NoEndpointFound = 5, /**< A compatible HID IN endpoint was not found in the device's HID interface */
};
/* Configuration Descriptor Comparison Functions: */
DESCRIPTOR_COMPARATOR(NextHIDInterface);
DESCRIPTOR_COMPARATOR(NextInterfaceHIDDataEndpoint);
/* Function Prototypes: */
uint8_t ProcessConfigurationDescriptor(void);
#endif
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/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
*
* Main source file for the GenericHIDHost demo. This file contains the main tasks of
* the demo and is responsible for the initial application hardware configuration.
*/
#include "GenericHIDHost.h"
/* Project Tags, for reading out using the ButtLoad project */
BUTTLOADTAG(ProjName, "LUFA GenHid Host App");
BUTTLOADTAG(BuildTime, __TIME__);
BUTTLOADTAG(BuildDate, __DATE__);
BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING);
/* Scheduler Task List */
TASK_LIST
{
{ Task: USB_USBTask , TaskStatus: TASK_STOP },
{ Task: USB_HID_Host , TaskStatus: TASK_STOP },
};
/** Main program entry point. This routine configures the hardware required by the application, then
* starts the scheduler to run the application tasks.
*/
int main(void)
{
/* Disable watchdog if enabled by bootloader/fuses */
MCUSR &= ~(1 << WDRF);
wdt_disable();
/* Disable clock division */
clock_prescale_set(clock_div_1);
/* Hardware Initialization */
SerialStream_Init(9600, false);
LEDs_Init();
/* Indicate USB not ready */
UpdateStatus(Status_USBNotReady);
/* Initialize Scheduler so that it can be used */
Scheduler_Init();
/* Initialize USB Subsystem */
USB_Init();
/* Startup message */
puts_P(PSTR(ESC_RESET ESC_BG_WHITE ESC_INVERSE_ON ESC_ERASE_DISPLAY
"Generic HID Host Demo running.\r\n" ESC_INVERSE_OFF));
/* Scheduling - routine never returns, so put this last in the main function */
Scheduler_Start();
}
/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
* starts the library USB task to begin the enumeration and USB management process.
*/
EVENT_HANDLER(USB_DeviceAttached)
{
puts_P(PSTR("Device Attached.\r\n"));
UpdateStatus(Status_USBEnumerating);
/* Start USB management task to enumerate the device */
Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
}
/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
* stops the library USB task management process.
*/
EVENT_HANDLER(USB_DeviceUnattached)
{
/* Stop HID and USB management task */
Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
Scheduler_SetTaskMode(USB_HID_Host, TASK_STOP);
puts_P(PSTR("Device Unattached.\r\n"));
UpdateStatus(Status_USBNotReady);
}
/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
* enumerated by the host and is now ready to be used by the application.
*/
EVENT_HANDLER(USB_DeviceEnumerationComplete)
{
/* Start HID Host task */
Scheduler_SetTaskMode(USB_HID_Host, TASK_RUN);
/* Indicate device enumeration complete */
UpdateStatus(Status_USBReady);
}
/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
EVENT_HANDLER(USB_HostError)
{
USB_ShutDown();
puts_P(PSTR(ESC_BG_RED "Host Mode Error\r\n"));
printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
UpdateStatus(Status_HardwareError);
for(;;);
}
/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occured while
* enumerating an attached USB device.
*/
EVENT_HANDLER(USB_DeviceEnumerationFailed)
{
puts_P(PSTR(ESC_BG_RED "Dev Enum Error\r\n"));
printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
printf_P(PSTR(" -- Sub Error Code %d\r\n"), SubErrorCode);
printf_P(PSTR(" -- In State %d\r\n"), USB_HostState);
UpdateStatus(Status_EnumerationError);
}
/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to
* log to a serial port, or anything else that is suitable for status updates.
*
* \param CurrentStatus Current status of the system, from the GenericHIDHost_StatusCodes_t enum
*/
void UpdateStatus(uint8_t CurrentStatus)
{
uint8_t LEDMask = LEDS_NO_LEDS;
/* Set the LED mask to the appropriate LED mask based on the given status code */
switch (CurrentStatus)
{
case Status_USBNotReady:
LEDMask = (LEDS_LED1);
break;
case Status_USBEnumerating:
LEDMask = (LEDS_LED1 | LEDS_LED2);
break;
case Status_USBReady:
LEDMask = (LEDS_LED2);
break;
case Status_EnumerationError:
case Status_HardwareError:
LEDMask = (LEDS_LED1 | LEDS_LED3);
break;
}
/* Set the board LEDs to the new LED mask */
LEDs_SetAllLEDs(LEDMask);
}
/** Reads in and processes the next report from the attached device, displaying the report
* contents on the board LEDs and via the serial port.
*/
void ReadNextReport(void)
{
/* Select and unfreeze HID data IN pipe */
Pipe_SelectPipe(HID_DATA_IN_PIPE);
Pipe_Unfreeze();
/* Ensure pipe contains data and is ready to be read before continuing */
if (!(Pipe_ReadWriteAllowed()))
{
#if !defined(INTERRUPT_DATA_PIPE)
/* Refreeze HID data IN pipe */
Pipe_Freeze();
#endif
return;
}
uint8_t ReportINData[Pipe_BytesInPipe()];
/* Read in HID report data */
Pipe_Read_Stream_LE(&ReportINData, sizeof(ReportINData));
/* Clear the IN endpoint, ready for next data packet */
Pipe_ClearCurrentBank();
/* Print report data through the serial port */
for (uint16_t CurrByte = 0; CurrByte < sizeof(ReportINData); CurrByte++)
printf_P(PSTR("0x%02X "), ReportINData[CurrByte]);
puts_P(PSTR("\r\n"));
#if !defined(INTERRUPT_DATA_PIPE)
/* Refreeze HID data IN pipe */
Pipe_Freeze();
#endif
}
/** Writes a report to the attached device.
*
* \param ReportOUTData Buffer containing the report to send to the device
* \param ReportLength Length of the report to send
*/
void WriteNextReport(uint8_t ReportOUTData, uint16_t ReportLength)
{
/* Select and unfreeze HID data OUT pipe */
Pipe_SelectPipe(HID_DATA_IN_PIPE);
/* Not all HID devices have an OUT endpoint (some require OUT reports to be sent over the
* control endpoint instead) - check to see if the OUT endpoint has been initialized */
if (Pipe_IsConfigured())
{
Pipe_Unfreeze();
/* Ensure pipe is ready to be written to before continuing */
if (!(Pipe_ReadWriteAllowed()))
{
/* Refreeze the data OUT pipe */
Pipe_Freeze();
return;
}
/* Read in HID report data */
Pipe_Write_Stream_LE(&ReportOUTData, ReportLength);
/* Clear the OUT endpoint, send last data packet */
Pipe_ClearCurrentBank();
/* Refreeze the data OUT pipe */
Pipe_Freeze();
}
else
{
/* Class specific request to send a HID report to the device */
USB_HostRequest = (USB_Host_Request_Header_t)
{
bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
bRequest: REQ_SetReport,
wValue: 0,
wIndex: 0,
wLength: ReportLength,
};
/* Send the request to the device */
USB_Host_SendControlRequest(ReportOUTData);
}
}
/** Task to set the configuration of the attached device after it has been enumerated, and to read and process
* HID reports from the device and to send reports if desired.
*/
TASK(USB_HID_Host)
{
uint8_t ErrorCode;
/* Switch to determine what user-application handled host state the host state machine is in */
switch (USB_HostState)
{
case HOST_STATE_Addressed:
/* Standard request to set the device configuration to configuration 1 */
USB_HostRequest = (USB_Host_Request_Header_t)
{
bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
bRequest: REQ_SetConfiguration,
wValue: 1,
wIndex: 0,
wLength: 0,
};
/* Send the request, display error and wait for device detatch if request fails */
if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
{
puts_P(PSTR("Control Error (Set Configuration).\r\n"));
printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
/* Indicate error status */
UpdateStatus(Status_EnumerationError);
/* Wait until USB device disconnected */
while (USB_IsConnected);
break;
}
USB_HostState = HOST_STATE_Configured;
break;
case HOST_STATE_Configured:
puts_P(PSTR("Getting Config Data.\r\n"));
/* Get and process the configuration descriptor data */
if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
{
if (ErrorCode == ControlError)
puts_P(PSTR("Control Error (Get Configuration).\r\n"));
else
puts_P(PSTR("Invalid Device.\r\n"));
printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
/* Indicate error status */
UpdateStatus(Status_EnumerationError);
/* Wait until USB device disconnected */
while (USB_IsConnected);
break;
}
#if defined(INTERRUPT_DATA_PIPE)
/* Select and unfreeze HID data IN pipe */
Pipe_SelectPipe(HID_DATA_IN_PIPE);
Pipe_Unfreeze();
#endif
puts_P(PSTR("HID Device Enumerated.\r\n"));
USB_HostState = HOST_STATE_Ready;
break;
#if !defined(INTERRUPT_DATA_PIPE)
case HOST_STATE_Ready:
ReadNextReport();
break;
#endif
}
}
#if defined(INTERRUPT_DATA_PIPE)
/** Interrupt handler for the Endpoint/Pipe interrupt vector. This interrupt fires each time an enabled
* pipe interrupt occurs on a pipe which has had that interrupt enabled.
*/
ISR(ENDPOINT_PIPE_vect, ISR_BLOCK)
{
/* Check to see if the HID data IN pipe has caused the interrupt */
if (Pipe_HasPipeInterrupted(HID_DATA_IN_PIPE))
{
/* Clear the pipe interrupt, and select the data IN pipe */
Pipe_ClearPipeInterrupt(HID_DATA_IN_PIPE);
Pipe_SelectPipe(HID_DATA_IN_PIPE);
/* Check to see if the pipe IN interrupt has fired */