diff options
Diffstat (limited to 'Demos/Device/CDC/CDC.c')
| -rw-r--r-- | Demos/Device/CDC/CDC.c | 317 |
1 files changed, 67 insertions, 250 deletions
diff --git a/Demos/Device/CDC/CDC.c b/Demos/Device/CDC/CDC.c index d7ebb9e6b..e6bc1a455 100644 --- a/Demos/Device/CDC/CDC.c +++ b/Demos/Device/CDC/CDC.c @@ -28,54 +28,42 @@ this software.
*/
-/** \file
- *
- * Main source file for the CDC demo. This file contains the main tasks of the demo and
- * is responsible for the initial application hardware configuration.
- */
-
#include "CDC.h"
-/* Scheduler Task List */
-TASK_LIST
-{
- { .Task = USB_USBTask , .TaskStatus = TASK_STOP },
- { .Task = CDC_Task , .TaskStatus = TASK_STOP },
-};
+USB_ClassInfo_CDC_t VirtualSerial_CDC_Interface =
+ {
+ .ControlInterfaceNumber = 0,
-/* Globals: */
-/** 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.
- */
-CDC_Line_Coding_t LineCoding = { .BaudRateBPS = 9600,
- .CharFormat = OneStopBit,
- .ParityType = Parity_None,
- .DataBits = 8 };
+ .DataINEndpointNumber = CDC_TX_EPNUM,
+ .DataINEndpointSize = CDC_TXRX_EPSIZE,
-/** String to print through the virtual serial port when the joystick is pressed upwards. */
-char JoystickUpString[] = "Joystick Up\r\n";
+ .DataOUTEndpointNumber = CDC_RX_EPNUM,
+ .DataOUTEndpointSize = CDC_TXRX_EPSIZE,
-/** String to print through the virtual serial port when the joystick is pressed downward. */
-char JoystickDownString[] = "Joystick Down\r\n";
+ .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
+ .NotificationEndpointSize = CDC_NOTIFICATION_EPSIZE,
+ };
-/** String to print through the virtual serial port when the joystick is pressed left. */
-char JoystickLeftString[] = "Joystick Left\r\n";
+int main(void)
+{
+ SetupHardware();
+
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-/** String to print through the virtual serial port when the joystick is pressed right. */
-char JoystickRightString[] = "Joystick Right\r\n";
+ for (;;)
+ {
+ CheckJoystickMovement();
+
+ uint16_t BytesToDiscard = USB_CDC_BytesReceived(&VirtualSerial_CDC_Interface);
+ while (BytesToDiscard--)
+ USB_CDC_ReceiveByte(&VirtualSerial_CDC_Interface);
-/** String to print through the virtual serial port when the joystick is pressed inwards. */
-char JoystickPressedString[] = "Joystick Pressed\r\n";
+ USB_CDC_USBTask(&VirtualSerial_CDC_Interface);
+ USB_USBTask();
+ }
+}
-/** 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)
+void SetupHardware(void)
{
/* Disable watchdog if enabled by bootloader/fuses */
MCUSR &= ~(1 << WDRF);
@@ -87,235 +75,64 @@ int main(void) /* Hardware Initialization */
Joystick_Init();
LEDs_Init();
-
- /* Indicate USB not ready */
- UpdateStatus(Status_USBNotReady);
-
- /* Initialize Scheduler so that it can be used */
- Scheduler_Init();
-
- /* Initialize USB Subsystem */
USB_Init();
-
- /* Scheduling - routine never returns, so put this last in the main function */
- Scheduler_Start();
-}
-
-/** 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_Connect(void)
-{
- /* Start USB management task */
- Scheduler_SetTaskMode(USB_USBTask, TASK_RUN);
-
- /* Indicate USB enumerating */
- UpdateStatus(Status_USBEnumerating);
-}
-
-/** 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_Disconnect(void)
-{
- /* Stop running CDC and USB management tasks */
- Scheduler_SetTaskMode(CDC_Task, TASK_STOP);
- Scheduler_SetTaskMode(USB_USBTask, TASK_STOP);
-
- /* Indicate USB not ready */
- UpdateStatus(Status_USBNotReady);
-}
-
-/** 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_ConfigurationChanged(void)
-{
- /* Setup CDC Notification, Rx and Tx Endpoints */
- Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT,
- ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,
- ENDPOINT_BANK_SINGLE);
-
- Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK,
- ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,
- ENDPOINT_BANK_SINGLE);
-
- Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK,
- ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,
- ENDPOINT_BANK_SINGLE);
-
- /* Indicate USB connected and ready */
- UpdateStatus(Status_USBReady);
-
- /* Start CDC task */
- Scheduler_SetTaskMode(CDC_Task, TASK_RUN);
-}
-
-/** Event handler for the USB_UnhandledControlPacket 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_UnhandledControlPacket(void)
-{
- uint8_t* LineCodingData = (uint8_t*)&LineCoding;
-
- /* 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(LineCodingData, sizeof(CDC_Line_Coding_t));
-
- /* 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(LineCodingData, sizeof(CDC_Line_Coding_t));
-
- /* Finalize the stream transfer to clear the last packet from the host */
- Endpoint_ClearIN();
- }
-
- 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:
- */
-
- /* Acknowledge status stage */
- while (!(Endpoint_IsINReady()));
- Endpoint_ClearIN();
- }
-
- break;
- }
}
-/** 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 CDC_StatusCodes_t enum
- */
-void UpdateStatus(uint8_t CurrentStatus)
+void CheckJoystickMovement(void)
{
- 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 | LEDS_LED4);
- break;
- }
+ uint8_t JoyStatus_LCL = Joystick_GetStatus();
+ char* ReportString = NULL;
+ static bool ActionSent = false;
- /* Set the board LEDs to the new LED mask */
- LEDs_SetAllLEDs(LEDMask);
-}
-
-/** Function to manage CDC data transmission and reception to and from the host. */
-TASK(CDC_Task)
-{
- char* ReportString = NULL;
- uint8_t JoyStatus_LCL = Joystick_GetStatus();
- static bool ActionSent = false;
-
-#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)
+ char* JoystickStrings[] =
{
- .NotificationType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
- .Notification = NOTIF_SerialState,
- .wValue = 0,
- .wIndex = 0,
- .wLength = sizeof(uint16_t),
+ "Joystick Up\r\n",
+ "Joystick Down\r\n",
+ "Joystick Left\r\n",
+ "Joystick Right\r\n",
+ "Joystick Pressed\r\n",
};
-
- 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
- /* Determine if a joystick action has occurred */
if (JoyStatus_LCL & JOY_UP)
- ReportString = JoystickUpString;
+ ReportString = JoystickStrings[0];
else if (JoyStatus_LCL & JOY_DOWN)
- ReportString = JoystickDownString;
+ ReportString = JoystickStrings[1];
else if (JoyStatus_LCL & JOY_LEFT)
- ReportString = JoystickLeftString;
+ ReportString = JoystickStrings[2];
else if (JoyStatus_LCL & JOY_RIGHT)
- ReportString = JoystickRightString;
+ ReportString = JoystickStrings[3];
else if (JoyStatus_LCL & JOY_PRESS)
- ReportString = JoystickPressedString;
-
- /* Flag management - Only allow one string to be sent per action */
- if (ReportString == NULL)
- {
- ActionSent = false;
- }
- else if (ActionSent == false)
+ ReportString = JoystickStrings[4];
+ else
+ ActionSent = false;
+
+ if ((ReportString != NULL) && (ActionSent == false))
{
ActionSent = true;
+
+ USB_CDC_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
+ }
+}
- /* Select the Serial Tx Endpoint */
- Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+void EVENT_USB_Connect(void)
+{
+ LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
- /* Write the String to the Endpoint */
- Endpoint_Write_Stream_LE(ReportString, strlen(ReportString));
-
- /* Remember if the packet to send completely fills the endpoint */
- bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE);
+void EVENT_USB_Disconnect(void)
+{
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
- /* Finalize the stream transfer to send the last packet */
- Endpoint_ClearIN();
+void EVENT_USB_ConfigurationChanged(void)
+{
+ LEDs_SetAllLEDs(LEDMASK_USB_READY);
- /* 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 */
- while (!(Endpoint_IsINReady()));
-
- /* Send an empty packet to ensure that the host does not buffer data sent to it */
- Endpoint_ClearIN();
- }
- }
+ if (!(USB_CDC_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+}
- /* Select the Serial Rx Endpoint */
- Endpoint_SelectEndpoint(CDC_RX_EPNUM);
-
- /* Throw away any received data from the host */
- if (Endpoint_IsOUTReceived())
- Endpoint_ClearOUT();
+void EVENT_USB_UnhandledControlPacket(void)
+{
+ USB_CDC_ProcessControlPacket(&VirtualSerial_CDC_Interface);
}
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