From 74298f8ca11dc8d3b0359d1d4e124d6494c3eeac Mon Sep 17 00:00:00 2001 From: Nicolas Schodet Date: Fri, 10 Apr 2009 01:15:42 +0200 Subject: * digital/avr/modules/usb: - imported LUFA. --- .../avr/modules/usb/lufa/Demos/CDCHost/CDCHost.c | 278 +++++++++++++++++++++ 1 file changed, 278 insertions(+) create mode 100644 digital/avr/modules/usb/lufa/Demos/CDCHost/CDCHost.c (limited to 'digital/avr/modules/usb/lufa/Demos/CDCHost/CDCHost.c') diff --git a/digital/avr/modules/usb/lufa/Demos/CDCHost/CDCHost.c b/digital/avr/modules/usb/lufa/Demos/CDCHost/CDCHost.c new file mode 100644 index 00000000..ac6d89ad --- /dev/null +++ b/digital/avr/modules/usb/lufa/Demos/CDCHost/CDCHost.c @@ -0,0 +1,278 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2009. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, and distribute this software + and its documentation for any purpose and without fee is hereby + granted, 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 disclaim 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 CDCHost demo. This file contains the main tasks of + * the demo and is responsible for the initial application hardware configuration. + */ + +#include "CDCHost.h" + +/* Project Tags, for reading out using the ButtLoad project */ +BUTTLOADTAG(ProjName, "LUFA CDC Host App"); +BUTTLOADTAG(BuildTime, __TIME__); +BUTTLOADTAG(BuildDate, __DATE__); +BUTTLOADTAG(LUFAVersion, "LUFA V" LUFA_VERSION_STRING); + +/* Scheduler Task List */ +TASK_LIST +{ + { Task: USB_USBTask , TaskStatus: TASK_STOP }, + { Task: USB_CDC_Host , TaskStatus: TASK_STOP }, +}; + + +/** Main program entry point. This routine configures the hardware required by the application, then + * starts the scheduler to run the application tasks. + */ +int main(void) +{ + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable Clock Division */ + SetSystemClockPrescaler(0); + + /* Hardware Initialization */ + SerialStream_Init(9600, false); + LEDs_Init(); + + /* Indicate USB not ready */ + UpdateStatus(Status_USBNotReady); + + /* Initialize Scheduler so that it can be used */ + Scheduler_Init(); + + /* Initialize USB Subsystem */ + USB_Init(); + + /* Startup message */ + puts_P(PSTR(ESC_RESET ESC_BG_WHITE ESC_INVERSE_ON ESC_ERASE_DISPLAY + "CDC Host Demo running.\r\n" ESC_INVERSE_OFF)); + + /* Scheduling - routine never returns, so put this last in the main function */ + Scheduler_Start(); +} + +/** 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. + */ +EVENT_HANDLER(USB_DeviceAttached) +{ + puts_P(PSTR("Device Attached.\r\n")); + UpdateStatus(Status_USBEnumerating); + + /* Start USB management task to enumerate the device */ + Scheduler_SetTaskMode(USB_USBTask, TASK_RUN); +} + +/** 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. + */ +EVENT_HANDLER(USB_DeviceUnattached) +{ + /* Stop keyboard and USB management task */ + Scheduler_SetTaskMode(USB_USBTask, TASK_STOP); + Scheduler_SetTaskMode(USB_CDC_Host, TASK_STOP); + + puts_P(PSTR("\r\nDevice Unattached.\r\n")); + UpdateStatus(Status_USBNotReady); +} + +/** 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. + */ +EVENT_HANDLER(USB_DeviceEnumerationComplete) +{ + /* Start CDC Host task */ + Scheduler_SetTaskMode(USB_CDC_Host, TASK_RUN); + + /* Indicate device enumeration complete */ + UpdateStatus(Status_USBReady); +} + +/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */ +EVENT_HANDLER(USB_HostError) +{ + USB_ShutDown(); + + puts_P(PSTR(ESC_BG_RED "Host Mode Error\r\n")); + printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode); + + UpdateStatus(Status_HardwareError); + for(;;); +} + +/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occured while + * enumerating an attached USB device. + */ +EVENT_HANDLER(USB_DeviceEnumerationFailed) +{ + puts_P(PSTR(ESC_BG_RED "Dev Enum Error\r\n")); + printf_P(PSTR(" -- Error Code %d\r\n"), ErrorCode); + printf_P(PSTR(" -- Sub Error Code %d\r\n"), SubErrorCode); + printf_P(PSTR(" -- In State %d\r\n"), USB_HostState); + + UpdateStatus(Status_EnumerationError); +} + +/** Function to manage status updates to the user. This is done via LEDs on the given board, if available, but may be changed to + * log to a serial port, or anything else that is suitable for status updates. + * + * \param CurrentStatus Current status of the system, from the CDCHost_StatusCodes_t enum + */ +void UpdateStatus(uint8_t CurrentStatus) +{ + uint8_t LEDMask = LEDS_NO_LEDS; + + /* Set the LED mask to the appropriate LED mask based on the given status code */ + switch (CurrentStatus) + { + case Status_USBNotReady: + LEDMask = (LEDS_LED1); + break; + case Status_USBEnumerating: + LEDMask = (LEDS_LED1 | LEDS_LED2); + break; + case Status_USBReady: + LEDMask = (LEDS_LED2); + break; + case Status_EnumerationError: + case Status_HardwareError: + LEDMask = (LEDS_LED1 | LEDS_LED3); + break; + } + + /* Set the board LEDs to the new LED mask */ + LEDs_SetAllLEDs(LEDMask); +} + +/** Task to set the configuration of the attached device after it has been enumerated, and to read in + * data received from the attached CDC device and print it to the serial port. + */ +TASK(USB_CDC_Host) +{ + uint8_t ErrorCode; + + switch (USB_HostState) + { + case HOST_STATE_Addressed: + /* Standard request to set the device configuration to configuration 1 */ + USB_HostRequest = (USB_Host_Request_Header_t) + { + bmRequestType: (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE), + bRequest: REQ_SetConfiguration, + wValue: 1, + wIndex: 0, + wLength: 0, + }; + + /* Send the request, display error and wait for device detatch if request fails */ + if ((ErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful) + { + puts_P(PSTR("Control Error (Set Configuration).\r\n")); + printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode); + + /* Indicate error via status LEDs */ + UpdateStatus(Status_EnumerationError); + + /* Wait until USB device disconnected */ + while (USB_IsConnected); + break; + } + + USB_HostState = HOST_STATE_Configured; + break; + case HOST_STATE_Configured: + puts_P(PSTR("Getting Config Data.\r\n")); + + /* Get and process the configuration descriptor data */ + if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead) + { + if (ErrorCode == ControlError) + puts_P(PSTR("Control Error (Get Configuration).\r\n")); + else + puts_P(PSTR("Invalid Device.\r\n")); + + printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode); + + /* Indicate error via status LEDs */ + UpdateStatus(Status_EnumerationError); + + /* Wait until USB device disconnected */ + while (USB_IsConnected); + break; + } + + puts_P(PSTR("CDC Device Enumerated.\r\n")); + + USB_HostState = HOST_STATE_Ready; + break; + case HOST_STATE_Ready: + /* Select and the data IN pipe */ + Pipe_SelectPipe(CDC_DATAPIPE_IN); + + /* Check if data is in the pipe */ + if (Pipe_ReadWriteAllowed()) + { + /* Get the length of the pipe data, and create a new buffer to hold it */ + uint16_t BufferLength = Pipe_BytesInPipe(); + uint8_t Buffer[BufferLength]; + + /* Read in the pipe data to the tempoary buffer */ + Pipe_Read_Stream_LE(Buffer, BufferLength); + + /* Clear the pipe after it is read, ready for the next packet */ + Pipe_ClearCurrentBank(); + + /* Print out the buffer contents to the USART */ + for (uint16_t BufferByte = 0; BufferByte < BufferLength; BufferByte++) + putchar(Buffer[BufferByte]); + } + + /* Select and unfreeze the notification pipe */ + Pipe_SelectPipe(CDC_NOTIFICATIONPIPE); + Pipe_Unfreeze(); + + /* Check if data is in the pipe */ + if (Pipe_ReadWriteAllowed()) + { + /* Discard the event notification */ + Pipe_ClearCurrentBank(); + } + + /* Freeze notification IN pipe after use */ + Pipe_Freeze(); + + break; + } +} -- cgit v1.2.3