diff options
Diffstat (limited to 'lib/lufa/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c')
| -rw-r--r-- | lib/lufa/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/lib/lufa/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c b/lib/lufa/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c deleted file mode 100644 index 2e56d7f35..000000000 --- a/lib/lufa/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c +++ /dev/null @@ -1,250 +0,0 @@ -/* - 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" - -/** 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 (;;) - { - 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 */ - Serial_Init(9600, false); - Buttons_Init(); - ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32); - ADC_SetupChannel(MIC_IN_ADC_CHANNEL); - LEDs_Init(); - 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(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE)); - 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(ESC_FG_GREEN "Device Unattached.\r\n" ESC_FG_WHITE)); - 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) -{ - puts_P(PSTR("Getting Config Data.\r\n")); - - uint8_t ErrorCode; - - /* Get and process the configuration descriptor data */ - if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead) - { - if (ErrorCode == ControlError) - puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n")); - else - puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n")); - - printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode); - - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - return; - } - - /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */ - if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful) - { - printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n" - " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode); - - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - return; - } - - if ((ErrorCode = USB_Host_SetInterfaceAltSetting(StreamingInterfaceIndex, - StreamingInterfaceAltSetting)) != HOST_SENDCONTROL_Successful) - { - printf_P(PSTR(ESC_FG_RED "Could not set alternative streaming interface setting.\r\n" - " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode); - - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - USB_Host_SetDeviceConfiguration(0); - return; - } - - USB_ControlRequest = (USB_Request_Header_t) - { - .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT), - .bRequest = AUDIO_REQ_SetCurrent, - .wValue = (AUDIO_EPCONTROL_SamplingFreq << 8), - .wIndex = StreamingEndpointAddress, - .wLength = sizeof(USB_Audio_SampleFreq_t), - }; - - USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000); - - /* Select the control pipe for the request transfer */ - Pipe_SelectPipe(PIPE_CONTROLPIPE); - - /* Set the sample rate on the streaming interface endpoint */ - if ((ErrorCode = USB_Host_SendControlRequest(&SampleRate)) != HOST_SENDCONTROL_Successful) - { - printf_P(PSTR(ESC_FG_RED "Could not set requested Audio sample rate.\r\n" - " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode); - - 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("Speaker 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); -} - -/** ISR to handle the reloading of the endpoint with the next sample. */ -ISR(TIMER0_COMPA_vect, ISR_BLOCK) -{ - uint8_t PrevPipe = Pipe_GetCurrentPipe(); - - Pipe_SelectPipe(AUDIO_DATA_OUT_PIPE); - Pipe_Unfreeze(); - - /* Check if the current pipe can be written to (device ready for more data) */ - if (Pipe_IsOUTReady()) - { - 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 - - Pipe_Write_16_LE(AudioSample); - Pipe_Write_16_LE(AudioSample); - - if (!(Pipe_IsReadWriteAllowed())) - Pipe_ClearOUT(); - } - - Pipe_Freeze(); - Pipe_SelectPipe(PrevPipe); -} - |