-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2010.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, distribute, and sell this \r
- software and its documentation for any purpose is hereby granted\r
- without fee, provided that the above copyright notice appear in \r
- all copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting \r
- documentation, and that the name of the author not be used in \r
- advertising or publicity pertaining to distribution of the \r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-/** \file\r
- *\r
- * Main source file for the XPLAINBridge project. This file contains the main tasks of\r
- * the demo and is responsible for the initial application hardware configuration.\r
- */\r
-\r
-#include "XPLAINBridge.h"\r
-\r
-/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */\r
-RingBuff_t USBtoUART_Buffer;\r
-\r
-/** Circular buffer to hold data from the serial port before it is sent to the host. */\r
-RingBuff_t UARTtoUSB_Buffer;\r
-\r
-/** LUFA CDC Class driver interface configuration and state information. This structure is\r
- * passed to all CDC Class driver functions, so that multiple instances of the same class\r
- * within a device can be differentiated from one another.\r
- */\r
-USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =\r
- {\r
- .Config = \r
- {\r
- .ControlInterfaceNumber = 0,\r
-\r
- .DataINEndpointNumber = CDC_TX_EPNUM,\r
- .DataINEndpointSize = CDC_TXRX_EPSIZE,\r
- .DataINEndpointDoubleBank = false,\r
-\r
- .DataOUTEndpointNumber = CDC_RX_EPNUM,\r
- .DataOUTEndpointSize = CDC_TXRX_EPSIZE,\r
- .DataOUTEndpointDoubleBank = false,\r
-\r
- .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,\r
- .NotificationEndpointSize = CDC_NOTIFICATION_EPSIZE,\r
- .NotificationEndpointDoubleBank = false,\r
- },\r
- };\r
-\r
-/** Main program entry point. This routine contains the overall program flow, including initial\r
- * setup of all components and the main program loop.\r
- */\r
-int main(void)\r
-{\r
- SetupHardware();\r
- \r
- Buffer_Initialize(&USBtoUART_Buffer);\r
- Buffer_Initialize(&UARTtoUSB_Buffer);\r
-\r
- for (;;)\r
- {\r
- /* Read bytes from the USB OUT endpoint into the UART transmit buffer */\r
- for (uint8_t DataBytesRem = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface); DataBytesRem != 0; DataBytesRem--)\r
- {\r
- if (!(BUFF_STATICSIZE - USBtoUART_Buffer.Elements))\r
- break;\r
- \r
- Buffer_StoreElement(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));\r
- }\r
- \r
- /* Read bytes from the UART receive buffer into the USB IN endpoint */\r
- if (UARTtoUSB_Buffer.Elements)\r
- CDC_Device_SendByte(&VirtualSerial_CDC_Interface, Buffer_GetElement(&UARTtoUSB_Buffer));\r
- \r
- /* Load bytes from the UART transmit buffer into the UART */\r
- if ((USBtoUART_Buffer.Elements) && SoftUART_IsReady())\r
- SoftUART_TxByte(Buffer_GetElement(&USBtoUART_Buffer));\r
- \r
- /* Load bytes from the UART into the UART receive buffer */\r
- if(SoftUART_IsReceived())\r
- Buffer_StoreElement(&UARTtoUSB_Buffer, SoftUART_RxByte());\r
-\r
- CDC_Device_USBTask(&VirtualSerial_CDC_Interface);\r
- USB_USBTask();\r
- }\r
-}\r
-\r
-/** Configures the board hardware and chip peripherals for the demo's functionality. */\r
-void SetupHardware(void)\r
-{\r
- /* Disable watchdog if enabled by bootloader/fuses */\r
- MCUSR &= ~(1 << WDRF);\r
- wdt_disable();\r
-\r
- /* Disable clock division */\r
- clock_prescale_set(clock_div_1);\r
-\r
- /* Hardware Initialization */\r
- SoftUART_Init();\r
- LEDs_Init();\r
- USB_Init();\r
- \r
- PORTD |= (1 << 5); // PD5 is connected to the XMEGA /RESET, enable pullup\r
-}\r
-\r
-/** Event handler for the library USB Configuration Changed event. */\r
-void EVENT_USB_Device_ConfigurationChanged(void)\r
-{\r
- LEDs_SetAllLEDs(LEDS_LED1);\r
-\r
- if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))\r
- LEDs_SetAllLEDs(LEDS_NO_LEDS);\r
-}\r
-\r
-/** Event handler for the library USB Unhandled Control Request event. */\r
-void EVENT_USB_Device_UnhandledControlRequest(void)\r
-{\r
- CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);\r
-}\r
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2013.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2013 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 XPLAINBridge project. This file contains the main tasks of
+ * the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "XPLAINBridge.h"
+
+/** Current firmware mode, making the device behave as either a programmer or a USART bridge */
+bool CurrentFirmwareMode = MODE_USART_BRIDGE;
+
+/** 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.
+ */
+USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
+ {
+ .Config =
+ {
+ .ControlInterfaceNumber = INTERFACE_ID_CDC_CCI,
+ .DataINEndpoint =
+ {
+ .Address = CDC_TX_EPADDR,
+ .Size = CDC_TXRX_EPSIZE,
+ .Banks = 1,
+ },
+ .DataOUTEndpoint =
+ {
+ .Address = CDC_RX_EPADDR,
+ .Size = CDC_TXRX_EPSIZE,
+ .Banks = 1,
+ },
+ .NotificationEndpoint =
+ {
+ .Address = CDC_NOTIFICATION_EPADDR,
+ .Size = CDC_NOTIFICATION_EPSIZE,
+ .Banks = 1,
+ },
+ },
+ };
+
+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
+RingBuffer_t USBtoUART_Buffer;
+
+/** Underlying data buffer for \ref USBtoUART_Buffer, where the stored bytes are located. */
+static uint8_t USBtoUART_Buffer_Data[128];
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+RingBuffer_t UARTtoUSB_Buffer;
+
+/** Underlying data buffer for \ref UARTtoUSB_Buffer, where the stored bytes are located. */
+static uint8_t UARTtoUSB_Buffer_Data[128];
+
+
+/** 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 (;;)
+ {
+ if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+ UARTBridge_Task();
+ else
+ AVRISP_Task();
+
+ USB_USBTask();
+ }
+}
+
+void AVRISP_Task(void)
+{
+ /* Must be in the configured state for the AVRISP code to process data */
+ if (USB_DeviceState != DEVICE_STATE_Configured)
+ return;
+
+ V2Params_UpdateParamValues();
+
+ Endpoint_SelectEndpoint(AVRISP_DATA_OUT_EPADDR);
+
+ /* Check to see if a V2 Protocol command has been received */
+ if (Endpoint_IsOUTReceived())
+ {
+ LEDs_SetAllLEDs(LEDMASK_BUSY);
+
+ /* Pass off processing of the V2 Protocol command to the V2 Protocol handler */
+ V2Protocol_ProcessCommand();
+
+ LEDs_SetAllLEDs(LEDMASK_USB_READY);
+ }
+}
+
+void UARTBridge_Task(void)
+{
+ /* Must be in the configured state for the USART Bridge code to process data */
+ if (USB_DeviceState != DEVICE_STATE_Configured)
+ return;
+
+ /* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+ if (!(RingBuffer_IsFull(&USBtoUART_Buffer)))
+ {
+ int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+ /* Read bytes from the USB OUT endpoint into the UART transmit buffer */
+ if (!(ReceivedByte < 0))
+ RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
+ }
+
+ /* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
+ uint16_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
+ if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
+ {
+ /* Clear flush timer expiry flag */
+ TIFR0 |= (1 << TOV0);
+
+ /* Read bytes from the USART receive buffer into the USB IN endpoint */
+ while (BufferCount--)
+ {
+ /* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
+ if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
+ RingBuffer_Peek(&UARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
+ {
+ break;
+ }
+
+ /* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
+ RingBuffer_Remove(&UARTtoUSB_Buffer);
+ }
+ }
+
+ CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+}
+
+/** 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);
+#endif
+
+ /* Disable JTAG debugging */
+ MCUCR |= (1 << JTD);
+ MCUCR |= (1 << JTD);
+
+ /* Enable pull-up on the JTAG TDI pin so we can use it to select the mode */
+ PORTF |= (1 << 7);
+ Delay_MS(10);
+
+ /* Select the firmware mode based on the JTD pin's value */
+ CurrentFirmwareMode = (PINF & (1 << 7)) ? MODE_USART_BRIDGE : MODE_PDI_PROGRAMMER;
+
+ /* Re-enable JTAG debugging */
+ MCUCR &= ~(1 << JTD);
+ MCUCR &= ~(1 << JTD);
+
+ /* Hardware Initialization */
+ SoftUART_Init();
+ LEDs_Init();
+ #if defined(RESET_TOGGLES_LIBUSB_COMPAT)
+ UpdateCurrentCompatibilityMode();
+ #endif
+
+ /* USB Stack Initialization */
+ USB_Init();
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+ bool ConfigSuccess = true;
+
+ /* Configure the device endpoints according to the selected mode */
+ if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+ {
+ ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+
+ /* Configure the UART flush timer - run at Fcpu/1024 for maximum interval before overflow */
+ TCCR0B = ((1 << CS02) | (1 << CS00));
+
+ /* Initialize ring buffers used to hold serial data between USB and software UART interfaces */
+ RingBuffer_InitBuffer(&USBtoUART_Buffer, USBtoUART_Buffer_Data, sizeof(USBtoUART_Buffer_Data));
+ RingBuffer_InitBuffer(&UARTtoUSB_Buffer, UARTtoUSB_Buffer_Data, sizeof(UARTtoUSB_Buffer_Data));
+
+ /* Start the software USART */
+ SoftUART_Init();
+ }
+ else
+ {
+ ConfigSuccess &= Endpoint_ConfigureEndpoint(AVRISP_DATA_OUT_EPADDR, EP_TYPE_BULK, AVRISP_DATA_EPSIZE, 1);
+
+ if ((AVRISP_DATA_IN_EPADDR & ENDPOINT_EPNUM_MASK) != (AVRISP_DATA_OUT_EPADDR & ENDPOINT_EPNUM_MASK))
+ ConfigSuccess &= Endpoint_ConfigureEndpoint(AVRISP_DATA_IN_EPADDR, EP_TYPE_BULK, AVRISP_DATA_EPSIZE, 1);
+
+ /* Configure the V2 protocol packet handler */
+ V2Protocol_Init();
+ }
+
+ 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)
+{
+ if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+ CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}
+
+/** 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 CDC Class driver Line Encoding Changed event.
+ *
+ * \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
+{
+ /* Change the software UART's baud rate to match the new baud rate */
+ SoftUART_SetBaud(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
+}
+
+/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
+ * documentation) by the application code so that the address and size of a requested descriptor can be given
+ * to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
+ * is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
+ * USB host.
+ *
+ * \param[in] wValue Descriptor type and index to retrieve
+ * \param[in] wIndex Sub-index to retrieve (such as a localized string language)
+ * \param[out] DescriptorAddress Address of the retrieved descriptor
+ * \param[out] DescriptorMemorySpace Memory space that the descriptor is stored in
+ *
+ * \return Length of the retrieved descriptor in bytes, or NO_DESCRIPTOR if the descriptor was not found
+ */
+uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
+ const uint8_t wIndex,
+ const void** const DescriptorAddress,
+ uint8_t* const DescriptorMemorySpace)
+{
+ /* Return the correct descriptors based on the selected mode */
+ if (CurrentFirmwareMode == MODE_USART_BRIDGE)
+ return USART_GetDescriptor(wValue, wIndex, DescriptorAddress, DescriptorMemorySpace);
+ else
+ return AVRISP_GetDescriptor(wValue, wIndex, DescriptorAddress, DescriptorMemorySpace);
+}
+
projects / pub / USBasp.git / blobdiff