Copy existing Host mode demos to new ClassDriver and LowLevel subfolders.
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Dean Camera
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335
Demos/Host/LowLevel/KeyboardHost/KeyboardHost.c
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335
Demos/Host/LowLevel/KeyboardHost/KeyboardHost.c
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* Main source file for the KeyboardHost demo. This file contains the main tasks of
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* the demo and is responsible for the initial application hardware configuration.
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*/
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#include "KeyboardHost.h"
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/* Scheduler Task List */
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TASK_LIST
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{
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{ .Task = USB_USBTask , .TaskStatus = TASK_STOP },
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{ .Task = USB_Keyboard_Host , .TaskStatus = TASK_STOP },
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};
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/** Main program entry point. This routine configures the hardware required by the application, then
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* starts the scheduler to run the application tasks.
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*/
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int main(void)
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{
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/* Disable watchdog if enabled by bootloader/fuses */
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MCUSR &= ~(1 << WDRF);
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wdt_disable();
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/* Disable clock division */
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clock_prescale_set(clock_div_1);
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/* Hardware Initialization */
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SerialStream_Init(9600, false);
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LEDs_Init();
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/* Indicate USB not ready */
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UpdateStatus(Status_USBNotReady);
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/* Initialize Scheduler so that it can be used */
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Scheduler_Init();
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/* Initialize USB Subsystem */
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USB_Init();
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/* Start-up message */
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puts_P(PSTR(ESC_RESET ESC_BG_WHITE ESC_INVERSE_ON ESC_ERASE_DISPLAY
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"Keyboard Host Demo running.\r\n" ESC_INVERSE_OFF));
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/* Scheduling - routine never returns, so put this last in the main function */
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Scheduler_Start();
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}
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/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
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* starts the library USB task to begin the enumeration and USB management process.
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*/
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void EVENT_USB_DeviceAttached(void)
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{
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puts_P(PSTR("Device Attached.\r\n"));
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UpdateStatus(Status_USBEnumerating);
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/* Start USB management task to enumerate the device */
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Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
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}
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/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
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* stops the library USB task management process.
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*/
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void EVENT_USB_DeviceUnattached(void)
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{
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/* Stop Keyboard and USB management task */
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Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
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Scheduler_SetTaskMode(USB_Keyboard_Host, TASK_STOP);
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puts_P(PSTR("Device Unattached.\r\n"));
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UpdateStatus(Status_USBNotReady);
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}
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/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
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* enumerated by the host and is now ready to be used by the application.
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*/
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void EVENT_USB_DeviceEnumerationComplete(void)
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{
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/* Start Keyboard Host task */
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Scheduler_SetTaskMode(USB_Keyboard_Host, TASK_RUN);
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/* Indicate device enumeration complete */
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UpdateStatus(Status_USBReady);
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}
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/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
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void EVENT_USB_HostError(const uint8_t ErrorCode)
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{
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USB_ShutDown();
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puts_P(PSTR(ESC_BG_RED "Host Mode Error\r\n"));
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printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
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UpdateStatus(Status_HardwareError);
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for(;;);
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}
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/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
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* enumerating an attached USB device.
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*/
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void EVENT_USB_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
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{
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puts_P(PSTR(ESC_BG_RED "Dev Enum Error\r\n"));
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printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode);
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printf_P(PSTR(" -- Sub Error Code %d\r\n"), SubErrorCode);
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printf_P(PSTR(" -- In State %d\r\n"), USB_HostState);
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UpdateStatus(Status_EnumerationError);
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}
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/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to
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* log to a serial port, or anything else that is suitable for status updates.
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*
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* \param CurrentStatus Current status of the system, from the KeyboardHost_StatusCodes_t enum
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*/
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void UpdateStatus(uint8_t CurrentStatus)
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{
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uint8_t LEDMask = LEDS_NO_LEDS;
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/* Set the LED mask to the appropriate LED mask based on the given status code */
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switch (CurrentStatus)
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{
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case Status_USBNotReady:
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LEDMask = (LEDS_LED1);
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break;
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case Status_USBEnumerating:
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LEDMask = (LEDS_LED1 | LEDS_LED2);
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break;
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case Status_USBReady:
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LEDMask = (LEDS_LED2);
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break;
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case Status_EnumerationError:
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case Status_HardwareError:
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LEDMask = (LEDS_LED1 | LEDS_LED3);
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break;
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}
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/* Set the board LEDs to the new LED mask */
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LEDs_SetAllLEDs(LEDMask);
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}
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/** Reads in and processes the next report from the attached device, displaying the report
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* contents on the board LEDs and via the serial port.
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*/
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void ReadNextReport(void)
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{
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USB_KeyboardReport_Data_t KeyboardReport;
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/* Select keyboard data pipe */
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Pipe_SelectPipe(KEYBOARD_DATAPIPE);
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/* Unfreeze keyboard data pipe */
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Pipe_Unfreeze();
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/* Check to see if a packet has been received */
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if (!(Pipe_IsINReceived()))
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{
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/* Refreeze HID data IN pipe */
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Pipe_Freeze();
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return;
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}
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/* Ensure pipe contains data before trying to read from it */
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if (Pipe_IsReadWriteAllowed())
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{
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/* Read in keyboard report data */
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Pipe_Read_Stream_LE(&KeyboardReport, sizeof(KeyboardReport));
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/* Indicate if the modifier byte is non-zero (special key such as shift is being pressed) */
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LEDs_ChangeLEDs(LEDS_LED1, (KeyboardReport.Modifier) ? LEDS_LED1 : 0);
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/* Check if a key has been pressed */
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if (KeyboardReport.KeyCode)
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{
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/* Toggle status LED to indicate keypress */
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if (LEDs_GetLEDs() & LEDS_LED2)
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LEDs_TurnOffLEDs(LEDS_LED2);
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else
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LEDs_TurnOnLEDs(LEDS_LED2);
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char PressedKey = 0;
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/* Retrieve pressed key character if alphanumeric */
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if ((KeyboardReport.KeyCode >= 0x04) && (KeyboardReport.KeyCode <= 0x1D))
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PressedKey = (KeyboardReport.KeyCode - 0x04) + 'A';
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else if ((KeyboardReport.KeyCode >= 0x1E) && (KeyboardReport.KeyCode <= 0x27))
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PressedKey = (KeyboardReport.KeyCode - 0x1E) + '0';
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else if (KeyboardReport.KeyCode == 0x2C)
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PressedKey = ' ';
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else if (KeyboardReport.KeyCode == 0x28)
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PressedKey = '\n';
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/* Print the pressed key character out through the serial port if valid */
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if (PressedKey)
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putchar(PressedKey);
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}
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}
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/* Clear the IN endpoint, ready for next data packet */
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Pipe_ClearIN();
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/* Refreeze keyboard data pipe */
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Pipe_Freeze();
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}
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/** Task to set the configuration of the attached device after it has been enumerated, and to read and process
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* HID reports from the device and display the results onto the board LEDs.
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*/
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TASK(USB_Keyboard_Host)
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{
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uint8_t ErrorCode;
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switch (USB_HostState)
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{
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case HOST_STATE_Addressed:
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/* Standard request to set the device configuration to configuration 1 */
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USB_ControlRequest = (USB_Request_Header_t)
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{
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.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
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.bRequest = REQ_SetConfiguration,
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.wValue = 1,
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.wIndex = 0,
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.wLength = 0,
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};
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/* Select the control pipe for the request transfer */
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Pipe_SelectPipe(PIPE_CONTROLPIPE);
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/* Send the request, display error and wait for device detach if request fails */
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if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
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{
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puts_P(PSTR("Control Error (Set Configuration).\r\n"));
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printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
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/* Indicate error status */
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UpdateStatus(Status_EnumerationError);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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break;
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}
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USB_HostState = HOST_STATE_Configured;
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break;
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case HOST_STATE_Configured:
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puts_P(PSTR("Getting Config Data.\r\n"));
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/* Get and process the configuration descriptor data */
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if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
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{
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if (ErrorCode == ControlError)
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puts_P(PSTR("Control Error (Get Configuration).\r\n"));
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else
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puts_P(PSTR("Invalid Device.\r\n"));
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printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
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/* Indicate error status */
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UpdateStatus(Status_EnumerationError);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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break;
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}
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/* HID class request to set the keyboard protocol to the Boot Protocol */
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USB_ControlRequest = (USB_Request_Header_t)
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{
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.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
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.bRequest = REQ_SetProtocol,
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.wValue = 0,
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.wIndex = 0,
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.wLength = 0,
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};
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/* Select the control pipe for the request transfer */
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Pipe_SelectPipe(PIPE_CONTROLPIPE);
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/* Send the request, display error and wait for device detach if request fails */
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if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
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{
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puts_P(PSTR("Control Error (Set Protocol).\r\n"));
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printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
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/* Indicate error status */
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UpdateStatus(Status_EnumerationError);
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/* Wait until USB device disconnected */
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while (USB_IsConnected);
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break;
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}
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puts_P(PSTR("Keyboard Enumerated.\r\n"));
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USB_HostState = HOST_STATE_Ready;
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break;
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case HOST_STATE_Ready:
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/* If a report has been received, read and process it */
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ReadNextReport();
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break;
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}
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}
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