--- /dev/null
+/*
+ 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)
+ Copyright 2012 Simon Foster (simon.foster [at] inbox [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 SerialToLCD program. This file contains the main tasks of
+ * the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "SerialToLCD.h"
+
+/** Circular buffer to hold data from the host before it is sent to the LCD */
+static RingBuffer_t FromHost_Buffer;
+
+/** Underlying data buffer for \ref FromHost_Buffer, where the stored bytes are located. */
+static uint8_t FromHost_Buffer_Data[128];
+
+/** 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,
+ },
+ },
+ };
+
+
+/** 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();
+
+ RingBuffer_InitBuffer(&FromHost_Buffer, FromHost_Buffer_Data, sizeof(FromHost_Buffer_Data));
+
+ GlobalInterruptEnable();
+
+ for (;;)
+ {
+ /* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+ if (!(RingBuffer_IsFull(&FromHost_Buffer)))
+ {
+ int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+ /* Read bytes from the USB OUT endpoint into the USART transmit buffer */
+ if (!(ReceivedByte < 0))
+ RingBuffer_Insert(&FromHost_Buffer, ReceivedByte);
+ }
+
+ while (RingBuffer_GetCount(&FromHost_Buffer) > 0)
+ {
+ static uint8_t EscapePending = 0;
+ int16_t HD44780Byte = RingBuffer_Remove(&FromHost_Buffer);
+
+ if (HD44780Byte == COMMAND_ESCAPE)
+ {
+ if (EscapePending)
+ {
+ HD44780_WriteData(HD44780Byte);
+ EscapePending = 0;
+ }
+ else
+ {
+ /* Next received character is the command byte */
+ EscapePending = 1;
+ }
+ }
+ else
+ {
+ if (EscapePending)
+ {
+ HD44780_WriteCommand(HD44780Byte);
+ EscapePending = 0;
+ }
+ else
+ {
+ HD44780_WriteData(HD44780Byte);
+ }
+ }
+ }
+
+ CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+ USB_USBTask();
+ }
+}
+
+/** Configures the board hardware and chip peripherals for the application'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
+
+ /* Hardware Initialization */
+ USB_Init();
+
+ /* Power up the HD44780 Interface */
+ HD44780_Initialize();
+ HD44780_WriteCommand(CMD_DISPLAY_ON);
+
+ /* Start the flush timer so that overflows occur rapidly to push received bytes to the USB interface */
+ TCCR0B = (1 << CS02);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+ CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+}
+
+/** Event handler for the library USB Control Request reception event. */
+void EVENT_USB_Device_ControlRequest(void)
+{
+ CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}
projects / qmk_firmware.git / blobdiff