#第六届立创电赛#会唱歌的鼠标 - 立创电子设计大赛

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第六届立创电子设计开源大赛

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GPL 3.0

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* 1、项目功能介绍 这次制作一个带有USB声卡功能的鼠标，表面上看着是一个鼠标，其实它内置喇叭能够直接发声。 *2、项目属性 首次公开，原创。 * 3、开源协议 GPL3.0开源协议 *4、硬件部分 硬件上使用了 USB Hub 芯片对鼠标的 USB 信号进行扩展，转出2个USB接口，一个继续给鼠标使用，另外一个给 Arduino Leonardo (32U4)使用。理论上可以将32u4和USB Hub 芯片放在同一个 PCB 上，但是目前 32U4太贵了（立创商城 65元）。所以选择独立的"Badusb迷你型开发板 Beetle USB ATMEGA32U4虚拟键盘模块 "(22.88 元)。 32u4 带有 USB Device 功能，通过编程，让它报告自己为一个 USB 声卡设备。这样插入电脑后，Windows 会增加一个音频输出设备，选择从这个设备输出后， Windows 会将音频发送到 32U4上。最终我们使用 PWM pin 作为模拟输出驱动喇叭发声。 代码基于 Lufa USB 库开发，主要代码如下： #include "AudioOutput.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_Device_t Speaker_Audio_Interface = { .Config = { .ControlInterfaceNumber = INTERFACE_ID_AudioControl, .StreamingInterfaceNumber = INTERFACE_ID_AudioStream, .DataOUTEndpoint = { .Address = AUDIO_STREAM_EPADDR, .Size = AUDIO_STREAM_EPSIZE, .Banks = 2, }, }, }; /** Current audio sampling frequency of the streaming audio endpoint. */ static uint32_t CurrentAudioSampleFrequency = 48000; /** Main program entry point. This routine contains the overall program flow, including initial * setup of all components and the main program loop. */ int main(void) { SetupHardware(); //LAB_ZDebug LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); GlobalInterruptEnable(); for (;;) { Audio_Device_USBTask(&Speaker_Audio_Interface); USB_USBTask(); } } /** 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 */ //LAB_ZDebug LEDs_Init(); USB_Init(); } /** ISR to handle the reloading of the PWM timer with the next sample. */ ISR(TIMER0_COMPA_vect, ISR_BLOCK) { uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint(); /* Check that the USB bus is ready for the next sample to read */ if (Audio_Device_IsSampleReceived(&Speaker_Audio_Interface)) { /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */ int8_t LeftSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8); int8_t RightSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8); /* Mix the two channels together to produce a mono, 8-bit sample */ int8_t MixedSample_8Bit = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1); #if defined(AUDIO_OUT_MONO) /* Load the sample into the PWM timer channel */ OCR1A = (MixedSample_8Bit ^ (1 << 7)); #elif defined(AUDIO_OUT_STEREO) /* Load the dual 8-bit samples into the PWM timer channels */ OCR1A = (LeftSample_8Bit ^ (1 << 7)); OCR1B = (RightSample_8Bit ^ (1 << 7)); #elif defined(AUDIO_OUT_PORTC) /* Load the 8-bit mixed sample into PORTC */ PORTC = MixedSample_8Bit; #endif //LAB_ZDebug uint8_t LEDMask = LEDS_NO_LEDS; /* Turn on LEDs as the sample amplitude increases if (MixedSample_8Bit > 16) LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3 | LEDS_LED4); else if (MixedSample_8Bit > 8) LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3); else if (MixedSample_8Bit > 4) LEDMask = (LEDS_LED1 | LEDS_LED2); else if (MixedSample_8Bit > 2) LEDMask = (LEDS_LED1); LEDs_SetAllLEDs(LEDMask); */ } Endpoint_SelectEndpoint(PrevEndpoint); } /** Event handler for the library USB Connection event. */ void EVENT_USB_Device_Connect(void) { //LAB_ZDebug LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); /* Sample reload timer initialization */ TIMSK0 = (1 << OCIE0A); OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1); TCCR0A = (1 << WGM01); // CTC mode TCCR0B = (1 << CS01); // Fcpu/8 speed #if defined(AUDIO_OUT_MONO) /* Set speaker as output */ DDRB |= (1 << 6); #elif defined(AUDIO_OUT_STEREO) /* Set speakers as outputs */ DDRB |= ((1 << 6) | (1 << 5)); #elif defined(AUDIO_OUT_PORTC) /* Set PORTC as outputs */ DDRB |= 0xFF; #endif #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO)) /* PWM speaker timer initialization */ TCCR1A = ((1 << WGM10) | (1 << COM1A1) | (1 << COM1A0) | (1 << COM1B1) | (1 << COM1B0)); // Set on match, clear on TOP TCCR1B = ((1 << WGM12) | (1 << CS10)); // Fast 8-Bit PWM, F_CPU speed #endif } /** Event handler for the library USB Disconnection event. */ void EVENT_USB_Device_Disconnect(void) { //LAB_ZDebug LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); /* Stop the sample reload timer */ TCCR0B = 0; #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO)) /* Stop the PWM generation timer */ TCCR1B = 0; #endif #if defined(AUDIO_OUT_MONO) /* Set speaker as input to reduce current draw */ DDRB &= ~(1 << 6); #elif defined(AUDIO_OUT_STEREO) /* Set speakers as inputs to reduce current draw */ DDRB &= ~((1 << 6) | (1 << 5)); #elif defined(AUDIO_OUT_PORTC) /* Set PORTC low */ PORTB = 0x00; #endif } /** Event handler for the library USB Configuration Changed event. */ void EVENT_USB_Device_ConfigurationChanged(void) { bool ConfigSuccess = true; ConfigSuccess &= Audio_Device_ConfigureEndpoints(&Speaker_Audio_Interface); //LAB_ZDebug LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); } /** Event handler for the library USB Control Request reception event. */ void EVENT_USB_Device_ControlRequest(void) { Audio_Device_ProcessControlRequest(&Speaker_Audio_Interface); } /** Audio class driver callback for the setting and retrieval of streaming endpoint properties. This callback must be implemented * in the user application to handle property manipulations on streaming audio endpoints. * * When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for * the given endpoint index, and should return as fast as possible. When non-NULL, this value may be altered for GET operations * to indicate the size of the retrieved data. * * \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value * of the \c DataLength parameter. * * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. * \param[in] EndpointProperty Property of the endpoint to get or set, a value from Audio_ClassRequests_t. * \param[in] EndpointAddress Address of the streaming endpoint whose property is being referenced. * \param[in] EndpointControl Parameter of the endpoint to get or set, a value from Audio_EndpointControls_t. * \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum * length of the retrieved data. When NULL, the function should return whether the given property * and parameter is valid for the requested endpoint without reading or modifying the Data buffer. * \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where * the retrieved data is to be stored for GET operations. * * \return Boolean \c true if the property get/set was successful, \c false otherwise */ bool CALLBACK_Audio_Device_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, const uint8_t EndpointProperty, const uint8_t EndpointAddress, const uint8_t EndpointControl, uint16_t* const DataLength, uint8_t* Data) { /* Check the requested endpoint to see if a supported endpoint is being manipulated */ if (EndpointAddress == Speaker_Audio_Interface.Config.DataOUTEndpoint.Address) { /* Check the requested control to see if a supported control is being manipulated */ if (EndpointControl == AUDIO_EPCONTROL_SamplingFreq) { switch (EndpointProperty) { case AUDIO_REQ_SetCurrent: /* Check if we are just testing for a valid property, or actually adjusting it */ if (DataLength != NULL) { /* Set the new sampling frequency to the value given by the host */ CurrentAudioSampleFrequency = (((uint32_t)Data[2] << 16) | ((uint32_t)Data[1] << 8) | (uint32_t)Data[0]); /* Adjust sample reload timer to the new frequency */ OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1); } return true; case AUDIO_REQ_GetCurrent: /* Check if we are just testing for a valid property, or actually reading it */ if (DataLength != NULL) { *DataLength = 3; Data[2] = (CurrentAudioSampleFrequency >> 16); Data[1] = (CurrentAudioSampleFrequency >> 8); Data[0] = (CurrentAudioSampleFrequency & 0xFF); } return true; } } } return false; } /** Audio class driver callback for the setting and retrieval of streaming interface properties. This callback must be implemented * in the user application to handle property manipulations on streaming audio interfaces. * * When the DataLength parameter is NULL, this callback should only indicate whether the specified operation is valid for * the given entity and should return as fast as possible. When non-NULL, this value may be altered for GET operations * to indicate the size of the retrieved data. * * \note The length of the retrieved data stored into the Data buffer on GET operations should not exceed the initial value * of the \c DataLength parameter. * * \param[in,out] AudioInterfaceInfo Pointer to a structure containing an Audio Class configuration and state. * \param[in] Property Property of the interface to get or set, a value from Audio_ClassRequests_t. * \param[in] EntityAddress Address of the audio entity whose property is being referenced. * \param[in] Parameter Parameter of the entity to get or set, specific to each type of entity (see USB Audio specification). * \param[in,out] DataLength For SET operations, the length of the parameter data to set. For GET operations, the maximum * length of the retrieved data. When NULL, the function should return whether the given property * and parameter is valid for the requested endpoint without reading or modifying the Data buffer. * \param[in,out] Data Pointer to a location where the parameter data is stored for SET operations, or where * the retrieved data is to be stored for GET operations. * * \return Boolean \c true if the property GET/SET was successful, \c false otherwise */ bool CALLBACK_Audio_Device_GetSetInterfaceProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, const uint8_t Property, const uint8_t EntityAddress, const uint16_t Parameter, uint16_t* const DataLength, uint8_t* Data) { /* No audio interface entities in the device descriptor, thus no properties to get or set. */ return false; } *6、BOM清单 <img src="//image.lceda.cn/pullimage/gA00tD5f2xQqBXGrw8BIP2M67MrwhC3TkM47WSVt.png" alt="" width="1752" height="364"> *7、大赛LOGO验证 <img src="//image.lceda.cn/pullimage/6QE0yGEmR1wS8w6hH29OS6Qpz7pDFuCwuo0IFF6u.jpeg" alt="" width="1382" height="1036"> * 8、演示您的项目并录制成视频上传 <img src="//image.lceda.cn/pullimage/uQPsjJ4MNiCiPSqQpMVtm5JYTyF7ReBGDE4iCDNp.jpeg" alt="" width="3648" height="2736"> <img src="//image.lceda.cn/pullimage/SV4KID20tU4SYb4DlUuZWDD1ccbfTxKRZsAus90v.jpeg" alt="" width="3648" height="2736">