244 lines
8.6 KiB
C
244 lines
8.6 KiB
C
|
/*
|
||
|
|
LUFA Library
|
||
|
|
Copyright (C) Dean Camera, 2019.
|
||
|
|
|
||
|
|
dean [at] fourwalledcubicle [dot] com
|
||
|
|
www.lufa-lib.org
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright 2019 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 VirtualSerial demo. This file contains the main tasks of the demo and
|
||
|
|
* is responsible for the initial application hardware configuration.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "VirtualSerial.h"
|
||
|
|
|
||
|
|
/** Contains the current baud rate and other settings of the 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 LineEncoding = { .BaudRateBPS = 0,
|
||
|
|
.CharFormat = CDC_LINEENCODING_OneStopBit,
|
||
|
|
.ParityType = CDC_PARITY_None,
|
||
|
|
.DataBits = 8 };
|
||
|
|
|
||
|
|
|
||
|
|
/** 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 (;;)
|
||
|
|
{
|
||
|
|
CDC_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 task started.
|
||
|
|
*/
|
||
|
|
void EVENT_USB_Device_ConfigurationChanged(void)
|
||
|
|
{
|
||
|
|
bool ConfigSuccess = true;
|
||
|
|
|
||
|
|
/* Setup CDC Data Endpoints */
|
||
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPADDR, EP_TYPE_INTERRUPT, CDC_NOTIFICATION_EPSIZE, 1);
|
||
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_TX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
|
||
|
|
ConfigSuccess &= Endpoint_ConfigureEndpoint(CDC_RX_EPADDR, EP_TYPE_BULK, CDC_TXRX_EPSIZE, 1);
|
||
|
|
|
||
|
|
/* Reset line encoding baud rate so that the host knows to send new values */
|
||
|
|
LineEncoding.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)
|
||
|
|
{
|
||
|
|
/* 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(&LineEncoding, 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(&LineEncoding, 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();
|
||
|
|
|
||
|
|
/* 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:
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Function to manage CDC data transmission and reception to and from the host. */
|
||
|
|
void CDC_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) && LineEncoding.BaudRateBPS)
|
||
|
|
{
|
||
|
|
ActionSent = true;
|
||
|
|
|
||
|
|
/* Select the Serial Tx Endpoint */
|
||
|
|
Endpoint_SelectEndpoint(CDC_TX_EPADDR);
|
||
|
|
|
||
|
|
/* Write the String to the Endpoint */
|
||
|
|
Endpoint_Write_Stream_LE(ReportString, strlen(ReportString), NULL);
|
||
|
|
|
||
|
|
/* Remember if the packet to send completely fills the endpoint */
|
||
|
|
bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE);
|
||
|
|
|
||
|
|
/* Finalize the stream transfer to send the last packet */
|
||
|
|
Endpoint_ClearIN();
|
||
|
|
|
||
|
|
/* If 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)
|
||
|
|
{
|
||
|
|
/* 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(CDC_RX_EPADDR);
|
||
|
|
|
||
|
|
/* Throw away any received data from the host */
|
||
|
|
if (Endpoint_IsOUTReceived())
|
||
|
|
Endpoint_ClearOUT();
|
||
|
|
}
|
||
|
|
|