You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
251 lines
8.0 KiB
C
251 lines
8.0 KiB
C
8 years ago
|
/*
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|