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# QMK鍵盤固件

[![當前版本](https://img.shields.io/github/tag/qmk/qmk_firmware.svg)](https://github.com/qmk/qmk_firmware/tags)
[![築邦](https://travis-ci.org/qmk/qmk_firmware.svg?branch=master)](https://travis-ci.org/qmk/qmk_firmware)
[![不和諧](https://img.shields.io/discord/440868230475677696.svg)](https://discord.gg/Uq7gcHh)
[![文檔狀態](https://img.shields.io/badge/docs-ready-orange.svg)](https://docs.qmk.fm)
[![GitHub的貢獻者](https://img.shields.io/github/contributors/qmk/qmk_firmware.svg)](https://github.com/qmk/qmk_firmware/pulse/monthly)
[![GitHub的叉](https://img.shields.io/github/forks/qmk/qmk_firmware.svg?style=social&label=Fork)](https://github.com/qmk/qmk_firmware/)

## 什麼是QMK固件？

QMK是一個由社群維護的開源鍵盤韌體，其中包含了QMK Toolbox、qmk.fm和其它文件。QMK韌體是以[tmk\_keyboard](http://github.com/tmk/tmk_keyboard)為基礎，讓一些有用的功能在Atmel AVR控制器實現，使用於[OLKB](https://olkb.com)、[ergodox EZ](http://www.ergodox-ez.com)，和[Clueboard](http://clueboard.co/)的產品中。它也被移植到使用ChibiOS的ARM晶片上。你也可以用它來讓你徒手佈線，或是客製的鍵盤PCB發揮功能。

## 如何得到QMK

如果你打算貢獻鍵盤佈局，鍵盤或功能QMK，最容易做的事情是[叉通過Github上爬行](https://github.com/qmk/qmk_firmware#fork-destination-box)，和克隆你爬在本地進行更改，推動他們，然後打開從你的叉子[拉請求](https://github.com/qmk/qmk_firmware/pulls)。

否則，您可以直接下載([拉鍊](https://github.com/qmk/qmk_firmware/zipball/master) [焦油](https://github.com/qmk/qmk_firmware/tarball/master))，或者通過GIT中克隆它(`git@github.com:qmk/qmk_firmware.git`)或HTTP(`https://github.com/qmk/qmk_firmware.git`)。

## 如何編譯

你可以編譯之前，你需要[安裝環境](getting_started_build_tools.md)用於AVR或/和ARM開發。一旦完成，你會使用`make`命令建立一個鍵盤並用以下符號鍵盤佈局

    make planck/rev4:default

這將建立`rev4` `planck`的修訂與`default`鍵盤映射。並非所有鍵盤有一個修訂版(也稱為子項目或文件夾)，在這種情況下，它可以被省略：

    make preonic:default

## 如何赶近

QMK有很多[特點](features.md)探索和很好的協議[參考文獻](http://docs.qmk.fm)挖通的。大部分功能通過修改[鍵盤映射(keymap.md)，並改變[鍵碼](keycodes.md)冤大頭。
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/*
             LUFA Library
     Copyright (C) Dean Camera, 2017.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, 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 disclaims 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 AudioOutputHost demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 */

#include "AudioOutputHost.h"

/** LUFA Audio Class driver interface configuration and state information. This structure is
 *  passed to all Audio Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another.
 */
USB_ClassInfo_Audio_Host_t Speaker_Audio_Interface =
	{
		.Config =
			{
				.DataOUTPipe            =
					{
						.Address        = (PIPE_DIR_OUT | 2),
					},
			},
	};


/** Main program entry point. This routine configures the hardware required by the application, then
 *  enters a loop to run the application tasks in sequence.
 */
int main(void)
{
	SetupHardware();

	puts_P(PSTR(ESC_FG_CYAN "Audio Output Host Demo running.\r\n" ESC_FG_WHITE));

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	GlobalInterruptEnable();

	for (;;)
	{
		Audio_Host_USBTask(&Speaker_Audio_Interface);
		USB_USBTask();
	}
}

/** ISR to handle the reloading of the PWM timer with the next sample. */
ISR(TIMER0_COMPA_vect, ISR_BLOCK)
{
	uint8_t PrevPipe = Pipe_GetCurrentPipe();

	/* Check that the USB bus is ready for the next sample to write */
	if (Audio_Host_IsReadyForNextSample(&Speaker_Audio_Interface))
	{
		int16_t AudioSample;

		#if defined(USE_TEST_TONE)
			static uint8_t SquareWaveSampleCount;
			static int16_t CurrentWaveValue;

			/* In test tone mode, generate a square wave at 1/256 of the sample rate */
			if (SquareWaveSampleCount++ == 0xFF)
			  CurrentWaveValue ^= 0x8000;

			/* Only generate audio if the board button is being pressed */
			AudioSample = (Buttons_GetStatus() & BUTTONS_BUTTON1) ? CurrentWaveValue : 0;
		#else
			/* Audio sample is ADC value scaled to fit the entire range */
			AudioSample = ((SAMPLE_MAX_RANGE / ADC_MAX_RANGE) * ADC_GetResult());

			#if defined(MICROPHONE_BIASED_TO_HALF_RAIL)
			/* Microphone is biased to half rail voltage, subtract the bias from the sample value */
			AudioSample -= (SAMPLE_MAX_RANGE / 2);
			#endif
		#endif

		Audio_Host_WriteSample16(&Speaker_Audio_Interface, AudioSample);
		Audio_Host_WriteSample16(&Speaker_Audio_Interface, AudioSample);
	}

	Pipe_SelectPipe(PrevPipe);
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
#if (ARCH == ARCH_AVR8)
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

	/* Disable clock division */
	clock_prescale_set(clock_div_1);
#endif

	/* Hardware Initialization */
	Serial_Init(9600, false);
	LEDs_Init();
	Buttons_Init();
	ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
	ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
	USB_Init();

	/* Create a stdio stream for the serial port for stdin and stdout */
	Serial_CreateStream(NULL);

	/* Start the ADC conversion in free running mode */
	ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | ADC_GET_CHANNEL_MASK(MIC_IN_ADC_CHANNEL));
}

/** 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.
 */
void EVENT_USB_Host_DeviceAttached(void)
{
	puts_P(PSTR("Device Attached.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}

/** 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.
 */
void EVENT_USB_Host_DeviceUnattached(void)
{
	puts_P(PSTR("\r\nDevice Unattached.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}

/** 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.
 */
void EVENT_USB_Host_DeviceEnumerationComplete(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);

	uint16_t ConfigDescriptorSize;
	uint8_t  ConfigDescriptorData[512];

	if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
	                                       sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
	{
		puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (Audio_Host_ConfigurePipes(&Speaker_Audio_Interface,
	                              ConfigDescriptorSize, ConfigDescriptorData) != AUDIO_ENUMERROR_NoError)
	{
		puts_P(PSTR("Attached Device Not a Valid Audio Output Device.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Setting Device Configuration.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (Audio_Host_StartStopStreaming(&Speaker_Audio_Interface, true) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Enabling Audio Stream.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);
	if (Audio_Host_GetSetEndpointProperty(&Speaker_Audio_Interface, Speaker_Audio_Interface.Config.DataOUTPipe.Address,
	                                      AUDIO_REQ_SetCurrent, AUDIO_EPCONTROL_SamplingFreq,
	                                      sizeof(SampleRate), &SampleRate) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Setting Audio Sampling Frequency.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	/* Sample reload timer initialization */
	TIMSK0  = (1 << OCIE0A);
	OCR0A   = ((F_CPU / 8 / 48000) - 1);
	TCCR0A  = (1 << WGM01);  // CTC mode
	TCCR0B  = (1 << CS01);   // Fcpu/8 speed

	puts_P(PSTR("Audio Device Enumerated.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
}

/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
{
	USB_Disable();

	printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
	                         " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);

	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	for(;;);
}

/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 *  enumerating an attached USB device.
 */
void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
                                            const uint8_t SubErrorCode)
{
	printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
	                         " -- Error Code %d\r\n"
	                         " -- Sub Error Code %d\r\n"
	                         " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);

	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
}
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