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Diffstat (limited to 'lib/lufa/Demos/Device/LowLevel/DualVirtualSerial/DualVirtualSerial.c')
| -rw-r--r-- | lib/lufa/Demos/Device/LowLevel/DualVirtualSerial/DualVirtualSerial.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/lib/lufa/Demos/Device/LowLevel/DualVirtualSerial/DualVirtualSerial.c b/lib/lufa/Demos/Device/LowLevel/DualVirtualSerial/DualVirtualSerial.c new file mode 100644 index 000000000..b94a67dab --- /dev/null +++ b/lib/lufa/Demos/Device/LowLevel/DualVirtualSerial/DualVirtualSerial.c @@ -0,0 +1,299 @@ +/* + 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 DualVirtualSerial demo. This file contains the main tasks of the demo and + * is responsible for the initial application hardware configuration. + */ + +#include "DualVirtualSerial.h" + +/** Contains the current baud rate and other settings of the first virtual serial port. While this demo does not use + * the physical USART and thus does not use these settings, they must still be retained and returned to the host + * upon request or the host will assume the device is non-functional. + * + * These values are set by the host via a class-specific request, however they are not required to be used accurately. + * It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical + * serial link characteristics and instead sends and receives data in endpoint streams. + */ +static CDC_LineEncoding_t LineEncoding1 = { .BaudRateBPS = 0, + .CharFormat = CDC_LINEENCODING_OneStopBit, + .ParityType = CDC_PARITY_None, + .DataBits = 8 }; + +/** Contains the current baud rate and other settings of the second virtual serial port. While this demo does not use + * the physical USART and thus does not use these settings, they must still be retained and returned to the host + * upon request or the host will assume the device is non-functional. + * + * These values are set by the host via a class-specific request, however they are not required to be used accurately. + * It is possible to completely ignore these value or use other settings as the host is completely unaware of the physical + * serial link characteristics and instead sends and receives data in endpoint streams. + */ +static CDC_LineEncoding_t LineEncoding2 = { .BaudRateBPS = 0, + .CharFormat = CDC_LINEENCODING_OneStopBit, + .ParityType = CDC_PARITY_None, + .DataBits = 8 }; + + +/** 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(); + + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); + GlobalInterruptEnable(); + + for (;;) + { + CDC1_Task(); + CDC2_Task(); + 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); +#elif (ARCH == ARCH_XMEGA) + /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */ + XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU); + XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL); + + /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */ + XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ); + XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB); + + PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm; +#endif + + /* Hardware Initialization */ + Joystick_Init(); + 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) +{ + /* 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 tasks are started. + */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ + bool ConfigSuccess = true; + + /* Setup first CDC Interface's Endpoints */ + ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC1_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1); + ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC1_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1); + ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC1_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1); + + /* Setup second CDC Interface's Endpoints */ + ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC2_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1); + ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC2_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1); + ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC2_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1); + + /* Reset line encoding baud rates so that the host knows to send new values */ + LineEncoding1.BaudRateBPS = 0; + LineEncoding2.BaudRateBPS = 0; + + /* Indicate endpoint configuration success or failure */ + LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); +} + +/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to + * the device from the USB host before passing along unhandled control requests to the library for processing + * internally. + */ +void EVENT_USB_Device_ControlRequest(void) +{ + /* Determine which interface's Line Coding data is being set from the wIndex parameter */ + void* LineEncodingData = (USB_ControlRequest.wIndex == 0) ? &LineEncoding1 : &LineEncoding2; + + /* Process CDC specific control requests */ + switch (USB_ControlRequest.bRequest) + { + case CDC_REQ_GetLineEncoding: + if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + + /* Write the line coding data to the control endpoint */ + Endpoint_Write_Control_Stream_LE(LineEncodingData, sizeof(CDC_LineEncoding_t)); + Endpoint_ClearOUT(); + } + + break; + case CDC_REQ_SetLineEncoding: + if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + + /* Read the line coding data in from the host into the global struct */ + Endpoint_Read_Control_Stream_LE(LineEncodingData, sizeof(CDC_LineEncoding_t)); + Endpoint_ClearIN(); + } + + break; + case CDC_REQ_SetControlLineState: + if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE)) + { + Endpoint_ClearSETUP(); + Endpoint_ClearStatusStage(); + } + + break; + } +} + +/** Function to manage CDC data transmission and reception to and from the host for the first CDC interface, which sends joystick + * movements to the host as ASCII strings. + */ +void CDC1_Task(void) +{ + char* ReportString = NULL; + uint8_t JoyStatus_LCL = Joystick_GetStatus(); + static bool ActionSent = false; + + /* Device must be connected and configured for the task to run */ + if (USB_DeviceState != DEVICE_STATE_Configured) + return; + + /* Determine if a joystick action has occurred */ + if (JoyStatus_LCL & JOY_UP) + ReportString = "Joystick Up\r\n"; + else if (JoyStatus_LCL & JOY_DOWN) + ReportString = "Joystick Down\r\n"; + else if (JoyStatus_LCL & JOY_LEFT) + ReportString = "Joystick Left\r\n"; + else if (JoyStatus_LCL & JOY_RIGHT) + ReportString = "Joystick Right\r\n"; + else if (JoyStatus_LCL & JOY_PRESS) + ReportString = "Joystick Pressed\r\n"; + else + ActionSent = false; + + /* Flag management - Only allow one string to be sent per action */ + if ((ReportString != NULL) && (ActionSent == false) && LineEncoding1.BaudRateBPS) + { + ActionSent = true; + + /* Select the Serial Tx Endpoint */ + Endpoint_SelectEndpoint(CDC1_TX_EPADDR); + + /* Write the String to the Endpoint */ + Endpoint_Write_Stream_LE(ReportString, strlen(ReportString), NULL); + + /* Finalize the stream transfer to send the last packet */ + Endpoint_ClearIN(); + + /* Wait until the endpoint is ready for another packet */ + Endpoint_WaitUntilReady(); + + /* Send an empty packet to ensure that the host does not buffer data sent to it */ + Endpoint_ClearIN(); + } + + /* Select the Serial Rx Endpoint */ + Endpoint_SelectEndpoint(CDC1_RX_EPADDR); + + /* Throw away any received data from the host */ + if (Endpoint_IsOUTReceived()) + Endpoint_ClearOUT(); +} + +/** Function to manage CDC data transmission and reception to and from the host for the second CDC interface, which echoes back + * all data sent to it from the host. + */ +void CDC2_Task(void) +{ + /* Device must be connected and configured for the task to run */ + if (USB_DeviceState != DEVICE_STATE_Configured) + return; + + /* Select the Serial Rx Endpoint */ + Endpoint_SelectEndpoint(CDC2_RX_EPADDR); + + /* Check to see if any data has been received */ + if (Endpoint_IsOUTReceived()) + { + /* Create a temp buffer big enough to hold the incoming endpoint packet */ + uint8_t Buffer[Endpoint_BytesInEndpoint()]; + + /* Remember how large the incoming packet is */ + uint16_t DataLength = Endpoint_BytesInEndpoint(); + + /* Read in the incoming packet into the buffer */ + Endpoint_Read_Stream_LE(&Buffer, DataLength, NULL); + + /* Finalize the stream transfer to send the last packet */ + Endpoint_ClearOUT(); + + /* Select the Serial Tx Endpoint */ + Endpoint_SelectEndpoint(CDC2_TX_EPADDR); + + /* Write the received data to the endpoint */ + Endpoint_Write_Stream_LE(&Buffer, DataLength, NULL); + + /* Finalize the stream transfer to send the last packet */ + Endpoint_ClearIN(); + + /* Wait until the endpoint is ready for the next packet */ + Endpoint_WaitUntilReady(); + + /* Send an empty packet to prevent host buffering */ + Endpoint_ClearIN(); + } +} + |