+++ /dev/null
-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2011.\r
-\r
- dean [at] fourwalledcubicle [dot] com\r
- www.lufa-lib.org\r
-*/\r
-\r
-/*\r
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, distribute, and sell this\r
- software and its documentation for any purpose is hereby granted\r
- without fee, provided that the above copyright notice appear in\r
- all copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting\r
- documentation, and that the name of the author not be used in\r
- advertising or publicity pertaining to distribution of the\r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-/** \file\r
- *\r
- * Main source file for the AudioInputHost demo. This file contains the main tasks of\r
- * the demo and is responsible for the initial application hardware configuration.\r
- */\r
-\r
-#include "AudioInputHost.h"\r
-\r
-/** Main program entry point. This routine configures the hardware required by the application, then\r
- * enters a loop to run the application tasks in sequence.\r
- */\r
-int main(void)\r
-{\r
- SetupHardware();\r
-\r
- puts_P(PSTR(ESC_FG_CYAN "Audio Input Host Demo running.\r\n" ESC_FG_WHITE));\r
-\r
- LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
- sei();\r
-\r
- for (;;)\r
- {\r
- Audio_Task();\r
- USB_USBTask();\r
- }\r
-}\r
-\r
-/** Configures the board hardware and chip peripherals for the demo's functionality. */\r
-void SetupHardware(void)\r
-{\r
- /* Disable watchdog if enabled by bootloader/fuses */\r
- MCUSR &= ~(1 << WDRF);\r
- wdt_disable();\r
-\r
- /* Disable clock division */\r
- clock_prescale_set(clock_div_1);\r
-\r
- /* Hardware Initialization */\r
- Serial_Init(9600, false);\r
- LEDs_Init();\r
- USB_Init();\r
-\r
- /* Create a stdio stream for the serial port for stdin and stdout */\r
- Serial_CreateStream(NULL);\r
-}\r
-\r
-/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and\r
- * starts the library USB task to begin the enumeration and USB management process.\r
- */\r
-void EVENT_USB_Host_DeviceAttached(void)\r
-{\r
- puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));\r
- LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
-}\r
-\r
-/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and\r
- * stops the library USB task management process.\r
- */\r
-void EVENT_USB_Host_DeviceUnattached(void)\r
-{\r
- puts_P(PSTR(ESC_FG_GREEN "Device Unattached.\r\n" ESC_FG_WHITE));\r
- LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
-}\r
-\r
-/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully\r
- * enumerated by the host and is now ready to be used by the application.\r
- */\r
-void EVENT_USB_Host_DeviceEnumerationComplete(void)\r
-{\r
- LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
-}\r
-\r
-/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */\r
-void EVENT_USB_Host_HostError(const uint8_t ErrorCode)\r
-{\r
- USB_Disable();\r
-\r
- printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"\r
- " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);\r
-\r
- LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
- for(;;);\r
-}\r
-\r
-/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while\r
- * enumerating an attached USB device.\r
- */\r
-void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,\r
- const uint8_t SubErrorCode)\r
-{\r
- printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"\r
- " -- Error Code %d\r\n"\r
- " -- Sub Error Code %d\r\n"\r
- " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);\r
-\r
- LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-}\r
-\r
-void Audio_Task(void)\r
-{\r
- uint8_t ErrorCode;\r
-\r
- switch (USB_HostState)\r
- {\r
- case HOST_STATE_Addressed:\r
- puts_P(PSTR("Getting Config Data.\r\n"));\r
-\r
- /* Get and process the configuration descriptor data */\r
- if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)\r
- {\r
- if (ErrorCode == ControlError)\r
- puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));\r
- else\r
- puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));\r
-\r
- printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);\r
-\r
- /* Indicate error status */\r
- LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-\r
- /* Wait until USB device disconnected */\r
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;\r
- break;\r
- }\r
-\r
- /* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */\r
- if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)\r
- {\r
- printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"\r
- " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);\r
-\r
- /* Indicate error status */\r
- LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-\r
- /* Wait until USB device disconnected */\r
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;\r
- break;\r
- }\r
- \r
- if ((ErrorCode = USB_Host_SetInterfaceAltSetting(StreamingInterfaceIndex,\r
- StreamingInterfaceAltSetting)) != HOST_SENDCONTROL_Successful)\r
- {\r
- printf_P(PSTR(ESC_FG_RED "Could not set alternative streaming interface setting.\r\n"\r
- " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);\r
-\r
- /* Indicate error status */\r
- LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-\r
- /* Wait until USB device disconnected */\r
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;\r
- break;\r
- }\r
-\r
- USB_ControlRequest = (USB_Request_Header_t)\r
- {\r
- .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT),\r
- .bRequest = AUDIO_REQ_SetCurrent,\r
- .wValue = (AUDIO_EPCONTROL_SamplingFreq << 8),\r
- .wIndex = StreamingEndpointAddress,\r
- .wLength = sizeof(USB_Audio_SampleFreq_t),\r
- };\r
- \r
- USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);\r
-\r
- /* Select the control pipe for the request transfer */\r
- Pipe_SelectPipe(PIPE_CONTROLPIPE);\r
-\r
- /* Set the sample rate on the streaming interface endpoint */\r
- if ((ErrorCode = USB_Host_SendControlRequest(&SampleRate)) != HOST_SENDCONTROL_Successful)\r
- {\r
- /* Indicate error status */\r
- LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
-\r
- /* Wait until USB device disconnected */\r
- USB_HostState = HOST_STATE_WaitForDeviceRemoval;\r
- break;\r
- }\r
- \r
- /* Sample reload timer initialization */\r
- TIMSK0 = (1 << OCIE0A);\r
- OCR0A = ((F_CPU / 8 / 48000) - 1);\r
- TCCR0A = (1 << WGM01); // CTC mode\r
- TCCR0B = (1 << CS01); // Fcpu/8 speed \r
-\r
- /* Set speaker as output */\r
- DDRC |= (1 << 6);\r
-\r
- /* PWM speaker timer initialization */\r
- TCCR3A = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)); // Set on match, clear on TOP\r
- TCCR3B = ((1 << WGM32) | (1 << CS30)); // Fast 8-Bit PWM, F_CPU speed\r
- \r
- puts_P(PSTR("Microphone Enumerated.\r\n"));\r
-\r
- USB_HostState = HOST_STATE_Configured;\r
- break;\r
- case HOST_STATE_Configured:\r
- /* Do nothing - audio stream is handled by the timer interrupt routine */\r
- break;\r
- }\r
-}\r
-\r
-/** ISR to handle the reloading of the PWM timer with the next sample. */\r
-ISR(TIMER0_COMPA_vect, ISR_BLOCK)\r
-{\r
- uint8_t PrevPipe = Pipe_GetCurrentPipe();\r
-\r
- Pipe_SelectPipe(AUDIO_DATA_IN_PIPE);\r
- Pipe_Unfreeze();\r
-\r
- /* Check if the current pipe can be read from (contains a packet) and the device is sending data */\r
- if (Pipe_IsINReceived())\r
- {\r
- /* Retrieve the signed 16-bit audio sample, convert to 8-bit */\r
- int8_t Sample_8Bit = (Pipe_Read_16_LE() >> 8);\r
-\r
- /* Check to see if the bank is now empty */\r
- if (!(Pipe_IsReadWriteAllowed()))\r
- {\r
- /* Acknowledge the packet, clear the bank ready for the next packet */\r
- Pipe_ClearIN();\r
- }\r
-\r
- /* Load the sample into the PWM timer channel */\r
- OCR3A = (Sample_8Bit ^ (1 << 7));\r
-\r
- uint8_t LEDMask = LEDS_NO_LEDS;\r
-\r
- /* Turn on LEDs as the sample amplitude increases */\r
- if (Sample_8Bit > 16)\r
- LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3 | LEDS_LED4);\r
- else if (Sample_8Bit > 8)\r
- LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3);\r
- else if (Sample_8Bit > 4)\r
- LEDMask = (LEDS_LED1 | LEDS_LED2);\r
- else if (Sample_8Bit > 2)\r
- LEDMask = (LEDS_LED1);\r
-\r
- LEDs_SetAllLEDs(LEDMask);\r
- }\r
- \r
- Pipe_Freeze();\r
- Pipe_SelectPipe(PrevPipe);\r
-}\r
projects / pub / lufa.git / blobdiff