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/*
LUFA Library
Copyright (C) Dean Camera, 2018.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2018 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"
/** LUFA CDC Class driver interface configuration and state information. This structure is
* passed to all CDC Class driver functions, so that multiple instances of the same class
* within a device can be differentiated from one another. This is for the first CDC interface,
* which sends strings to the host for each joystick movement.
*/
USB_ClassInfo_CDC_Device_t VirtualSerial1_CDC_Interface =
{
.Config =
{
.ControlInterfaceNumber = INTERFACE_ID_CDC1_CCI,
.DataINEndpoint =
{
.Address = CDC1_TX_EPADDR,
.Size = CDC_TXRX_EPSIZE,
.Banks = 1,
},
.DataOUTEndpoint =
{
.Address = CDC1_RX_EPADDR,
.Size = CDC_TXRX_EPSIZE,
.Banks = 1,
},
.NotificationEndpoint =
{
.Address = CDC1_NOTIFICATION_EPADDR,
.Size = CDC_NOTIFICATION_EPSIZE,
.Banks = 1,
},
},
};
/** LUFA CDC Class driver interface configuration and state information. This structure is
* passed to all CDC Class driver functions, so that multiple instances of the same class
* within a device can be differentiated from one another. This is for the second CDC interface,
* which echos back all received data from the host.
*/
USB_ClassInfo_CDC_Device_t VirtualSerial2_CDC_Interface =
{
.Config =
{
.ControlInterfaceNumber = INTERFACE_ID_CDC2_CCI,
.DataINEndpoint =
{
.Address = CDC2_TX_EPADDR,
.Size = CDC_TXRX_EPSIZE,
.Banks = 1,
},
.DataOUTEndpoint =
{
.Address = CDC2_RX_EPADDR,
.Size = CDC_TXRX_EPSIZE,
.Banks = 1,
},
.NotificationEndpoint =
{
.Address = CDC2_NOTIFICATION_EPADDR,
.Size = CDC_NOTIFICATION_EPSIZE,
.Banks = 1,
},
},
};
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
*/
int main(void)
{
SetupHardware();
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
GlobalInterruptEnable();
for (;;)
{
CheckJoystickMovement();
/* Discard all received data on the first CDC interface */
CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
/* Echo all received data on the second CDC interface */
int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface);
if (!(ReceivedByte < 0))
CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, (uint8_t)ReceivedByte);
CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
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();
}
/** Checks for changes in the position of the board joystick, sending strings to the host upon each change
* through the first of the CDC interfaces.
*/
void CheckJoystickMovement(void)
{
uint8_t JoyStatus_LCL = Joystick_GetStatus();
char* ReportString = NULL;
static bool ActionSent = false;
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;
if ((ReportString != NULL) && (ActionSent == false))
{
ActionSent = true;
CDC_Device_SendString(&VirtualSerial1_CDC_Interface, ReportString);
}
}
/** Event handler for the library USB Connection event. */
void EVENT_USB_Device_Connect(void)
{
LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}
/** Event handler for the library USB Disconnection event. */
void EVENT_USB_Device_Disconnect(void)
{
LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}
/** Event handler for the library USB Configuration Changed event. */
void EVENT_USB_Device_ConfigurationChanged(void)
{
bool ConfigSuccess = true;
ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial1_CDC_Interface);
ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial2_CDC_Interface);
LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
}
/** Event handler for the library USB Control Request reception event. */
void EVENT_USB_Device_ControlRequest(void)
{
CDC_Device_ProcessControlRequest(&VirtualSerial1_CDC_Interface);
CDC_Device_ProcessControlRequest(&VirtualSerial2_CDC_Interface);
}
/** CDC class driver callback function the processing of changes to the virtual
* control lines sent from the host..
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
{
/* You can get changes to the virtual CDC lines in this callback; a common
use-case is to use the Data Terminal Ready (DTR) flag to enable and
disable CDC communications in your application when set to avoid the
application blocking while waiting for a host to become ready and read
in the pending data from the USB endpoints.
*/
bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
(void)HostReady;
if (CDCInterfaceInfo == &VirtualSerial1_CDC_Interface)
{
// CDC interface 1's host is ready to send/receive data if HostReady is true
}
else
{
// CDC interface 2's host is ready to send/receive data if HostReady is true
}
}
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