X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/c3dfc58707eafb6ed0efab5a50770294f5a6b3d3..de70f0f1cf034d8f22141a2825f24ad60d14421b:/Demos/Device/LowLevel/USBtoSerial/USBtoSerial.c diff --git a/Demos/Device/LowLevel/USBtoSerial/USBtoSerial.c b/Demos/Device/LowLevel/USBtoSerial/USBtoSerial.c deleted file mode 100644 index 577d2ba67..000000000 --- a/Demos/Device/LowLevel/USBtoSerial/USBtoSerial.c +++ /dev/null @@ -1,340 +0,0 @@ -/* - 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. -*/ - -#include "USBtoSerial.h" - -/** Contains the current baud rate and other settings of the virtual serial port. - * - * These values are set by the host via a class-specific request, and the physical USART should be reconfigured to match the - * new settings each time they are changed by the host. - */ -CDC_Line_Coding_t LineEncoding = { .BaudRateBPS = 0, - .CharFormat = OneStopBit, - .ParityType = Parity_None, - .DataBits = 8 }; - -/** Ring (circular) buffer to hold the RX data - data from the host to the attached device on the serial port. */ -RingBuff_t Rx_Buffer; - -/** Ring (circular) buffer to hold the TX data - data from the attached device on the serial port to the host. */ -RingBuff_t Tx_Buffer; - -/** Flag to indicate if the USART is currently transmitting data from the Rx_Buffer circular buffer. */ -volatile bool Transmitting = false; - - -/** 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(); - - /* Ring buffer Initialization */ - Buffer_Initialize(&Rx_Buffer); - Buffer_Initialize(&Tx_Buffer); - - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - - for (;;) - { - CDC_Task(); - USB_USBTask(); - } -} - -/** Configures the board hardware and chip peripherals for the demo's functionality. */ -void SetupHardware(void) -{ - /* Disable watchdog if enabled by bootloader/fuses */ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - /* Disable clock division */ - clock_prescale_set(clock_div_1); - - /* Hardware Initialization */ - Serial_Init(9600, false); - LEDs_Init(); - USB_Init(); -} - -/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and - * starts the library USB task to begin the enumeration and USB management process. - */ -void EVENT_USB_Device_Connect(void) -{ - /* Indicate USB enumerating */ - LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); -} - -/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via - * the status LEDs and stops the USB management and CDC management tasks. - */ -void EVENT_USB_Device_Disconnect(void) -{ - /* Reset Tx and Rx buffers, device disconnected */ - Buffer_Initialize(&Rx_Buffer); - Buffer_Initialize(&Tx_Buffer); - - /* Indicate USB not ready */ - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); -} - -/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration - * of the USB device after enumeration - the device endpoints are configured and the CDC management task started. - */ -void EVENT_USB_Device_ConfigurationChanged(void) -{ - /* Indicate USB connected and ready */ - LEDs_SetAllLEDs(LEDMASK_USB_READY); - - /* Setup CDC Notification, Rx and Tx Endpoints */ - if (!(Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT, - ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE, - ENDPOINT_BANK_SINGLE))) - { - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - } - - if (!(Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK, - ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE, - ENDPOINT_BANK_SINGLE))) - { - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - } - - if (!(Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK, - ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE, - ENDPOINT_BANK_SINGLE))) - { - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); - } - - /* Reset line encoding baud rate so that the host knows to send new values */ - LineEncoding.BaudRateBPS = 0; -} - -/** Event handler for the USB_UnhandledControlRequest event. This is used to catch standard and class specific - * control requests that are not handled internally by the USB library (including the CDC control commands, - * which are all issued via the control endpoint), so that they can be handled appropriately for the application. - */ -void EVENT_USB_Device_UnhandledControlRequest(void) -{ - /* Process CDC specific control requests */ - switch (USB_ControlRequest.bRequest) - { - case REQ_GetLineEncoding: - if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) - { - /* Acknowledge the SETUP packet, ready for data transfer */ - Endpoint_ClearSETUP(); - - /* Write the line coding data to the control endpoint */ - Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(LineEncoding)); - - /* Finalize the stream transfer to send the last packet or clear the host abort */ - Endpoint_ClearOUT(); - } - - break; - case REQ_SetLineEncoding: - if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) - { - /* Acknowledge the SETUP packet, ready for data transfer */ - Endpoint_ClearSETUP(); - - /* Read the line coding data in from the host into the global struct */ - Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(LineEncoding)); - - /* Finalize the stream transfer to clear the last packet from the host */ - Endpoint_ClearIN(); - - /* Reconfigure the USART with the new settings */ - ReconfigureUSART(); - } - - break; - case REQ_SetControlLineState: - if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) - { - /* Acknowledge the SETUP packet, ready for data transfer */ - Endpoint_ClearSETUP(); - - /* NOTE: Here you can read in the line state mask from the host, to get the current state of the output handshake - lines. The mask is read in from the wValue parameter in USB_ControlRequest, and can be masked against the - CONTROL_LINE_OUT_* masks to determine the RTS and DTR line states using the following code: - */ - - Endpoint_ClearStatusStage(); - } - - break; - } -} - -/** Task to manage CDC data transmission and reception to and from the host, from and to the physical USART. */ -void CDC_Task(void) -{ - /* Device must be connected and configured for the task to run */ - if (USB_DeviceState != DEVICE_STATE_Configured) - return; - -#if 0 - /* NOTE: Here you can use the notification endpoint to send back line state changes to the host, for the special RS-232 - handshake signal lines (and some error states), via the CONTROL_LINE_IN_* masks and the following code: - */ - - USB_Notification_Header_t Notification = (USB_Notification_Header_t) - { - .NotificationType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE), - .Notification = NOTIF_SerialState, - .wValue = 0, - .wIndex = 0, - .wLength = sizeof(uint16_t), - }; - - uint16_t LineStateMask; - - // Set LineStateMask here to a mask of CONTROL_LINE_IN_* masks to set the input handshake line states to send to the host - - Endpoint_SelectEndpoint(CDC_NOTIFICATION_EPNUM); - Endpoint_Write_Stream_LE(&Notification, sizeof(Notification)); - Endpoint_Write_Stream_LE(&LineStateMask, sizeof(LineStateMask)); - Endpoint_ClearIN(); -#endif - - /* Select the Serial Rx Endpoint */ - Endpoint_SelectEndpoint(CDC_RX_EPNUM); - - /* Check to see if a packet has been received from the host */ - if (Endpoint_IsOUTReceived()) - { - /* Read the bytes in from the endpoint into the buffer while space is available */ - while (Endpoint_BytesInEndpoint() && (Rx_Buffer.Elements != BUFF_STATICSIZE)) - { - /* Store each character from the endpoint */ - Buffer_StoreElement(&Rx_Buffer, Endpoint_Read_Byte()); - } - - /* Check to see if all bytes in the current packet have been read */ - if (!(Endpoint_BytesInEndpoint())) - { - /* Clear the endpoint buffer */ - Endpoint_ClearOUT(); - } - } - - /* Check if Rx buffer contains data - if so, send it */ - if (Rx_Buffer.Elements) - Serial_TxByte(Buffer_GetElement(&Rx_Buffer)); - - /* Select the Serial Tx Endpoint */ - Endpoint_SelectEndpoint(CDC_TX_EPNUM); - - /* Check if the Tx buffer contains anything to be sent to the host */ - if ((Tx_Buffer.Elements) && LineEncoding.BaudRateBPS) - { - /* Wait until Serial Tx Endpoint Ready for Read/Write */ - Endpoint_WaitUntilReady(); - - /* Write the bytes from the buffer to the endpoint while space is available */ - while (Tx_Buffer.Elements && Endpoint_IsReadWriteAllowed()) - { - /* Write each byte retreived from the buffer to the endpoint */ - Endpoint_Write_Byte(Buffer_GetElement(&Tx_Buffer)); - } - - /* Remember if the packet to send completely fills the endpoint */ - bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE); - - /* Send the data */ - Endpoint_ClearIN(); - - /* If no more data to send and the last packet filled the endpoint, send an empty packet to release - * the buffer on the receiver (otherwise all data will be cached until a non-full packet is received) */ - if (IsFull && !(Tx_Buffer.Elements)) - { - /* Wait until Serial Tx Endpoint Ready for Read/Write */ - Endpoint_WaitUntilReady(); - - /* Send an empty packet to terminate the transfer */ - Endpoint_ClearIN(); - } - } -} - -/** ISR to handle the USART receive complete interrupt, fired each time the USART has received a character. This stores the received - * character into the Tx_Buffer circular buffer for later transmission to the host. - */ -ISR(USART1_RX_vect, ISR_BLOCK) -{ - uint8_t ReceivedByte = UDR1; - - /* Only store received characters if the USB interface is connected */ - if ((USB_DeviceState == DEVICE_STATE_Configured) && LineEncoding.BaudRateBPS) - Buffer_StoreElement(&Tx_Buffer, ReceivedByte); -} - -/** Reconfigures the USART to match the current serial port settings issued by the host as closely as possible. */ -void ReconfigureUSART(void) -{ - uint8_t ConfigMask = 0; - - /* Determine parity - non odd/even parity mode defaults to no parity */ - if (LineEncoding.ParityType == Parity_Odd) - ConfigMask = ((1 << UPM11) | (1 << UPM10)); - else if (LineEncoding.ParityType == Parity_Even) - ConfigMask = (1 << UPM11); - - /* Determine stop bits - 1.5 stop bits is set as 1 stop bit due to hardware limitations */ - if (LineEncoding.CharFormat == TwoStopBits) - ConfigMask |= (1 << USBS1); - - /* Determine data size - 5, 6, 7, or 8 bits are supported */ - if (LineEncoding.DataBits == 6) - ConfigMask |= (1 << UCSZ10); - else if (LineEncoding.DataBits == 7) - ConfigMask |= (1 << UCSZ11); - else if (LineEncoding.DataBits == 8) - ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10)); - - /* Enable double speed, gives better error percentages at 8MHz */ - UCSR1A = (1 << U2X1); - - /* Enable transmit and receive modules and interrupts */ - UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1)); - - /* Set the USART mode to the mask generated by the Line Coding options */ - UCSR1C = ConfigMask; - - /* Set the USART baud rate register to the desired baud rate value */ - UBRR1 = SERIAL_2X_UBBRVAL((uint16_t)LineEncoding.BaudRateBPS); -}