Serial via USB works

Integrated rest of Peter's USB implementation

Author: zeveland

hardware/arduino/cores/arduino/CDC.cpp

@@ -0,0 +1,162 @@
+
+
+/* Copyright (c) 2011, Peter Barrett  
+**  
+** Permission to use, copy, modify, and/or distribute this software for  
+** any purpose with or without fee is hereby granted, provided that the  
+** above copyright notice and this permission notice appear in all copies.  
+** 
+** THE SOFTWARE IS PROVIDED "AS IS" AND 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, DIRECT, 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.  
+*/
+
+#include "Platform.h"
+#include "USBAPI.h"
+#include <avr/wdt.h>
+
+#ifdef CDC_ENABLED
+
+//	TODO: Should really use the wdt here
+//	Not currently working for a non-obvious reason
+
+typedef void (*AppPtr_t)(void) __attribute__ ((noreturn)); 
+AppPtr_t Bootloader = (AppPtr_t)(30*1024); 
+
+void Reboot()
+{
+	USB.detach();
+	cli();
+	Bootloader();
+	//wdt_enable(WDTO_15MS);
+	//while(1);	// reboot
+}
+
+typedef struct
+{
+	u32	dwDTERate;
+	u8	bCharFormat;
+	u8 	bParityType;
+	u8 	bDataBits;
+	u8	lineState;
+} LineInfo;
+
+static volatile LineInfo _usbLineInfo = { 57600, 0x00, 0x00, 0x00, 0x00 };
+
+#define WEAK __attribute__ ((weak))
+
+extern const CDCDescriptor _cdcInterface PROGMEM;
+const CDCDescriptor _cdcInterface =
+{
+	D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,1),
+
+	//	CDC communication interface
+	D_INTERFACE(CDC_ACM_INTERFACE,1,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0),
+	D_CDCCS(CDC_HEADER,0x10,0x01),								// Header (1.10 bcd)
+	D_CDCCS(CDC_CALL_MANAGEMENT,1,1),							// Device handles call management (not)
+	D_CDCCS4(CDC_ABSTRACT_CONTROL_MANAGEMENT,6),				// SET_LINE_CODING, GET_LINE_CODING, SET_CONTROL_LINE_STATE supported
+	D_CDCCS(CDC_UNION,CDC_ACM_INTERFACE,CDC_DATA_INTERFACE),	// Communication interface is master, data interface is slave 0
+	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10,0x40),
+
+	//	CDC data interface
+	D_INTERFACE(CDC_DATA_INTERFACE,2,CDC_DATA_INTERFACE_CLASS,0,0),
+	D_ENDPOINT(USB_ENDPOINT_OUT(CDC_ENDPOINT_OUT),USB_ENDPOINT_TYPE_BULK,0x40,0),
+	D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_IN ),USB_ENDPOINT_TYPE_BULK,0x40,0)
+};
+
+int WEAK CDC_GetInterface(u8* interfaceNum)
+{
+	interfaceNum[0] += 2;	// uses 2
+	return USB_SendControl(TRANSFER_PGM,&_cdcInterface,sizeof(_cdcInterface));
+}
+
+bool WEAK CDC_Setup(Setup& setup)
+{
+	u8 r = setup.bRequest;
+	u8 requestType = setup.bmRequestType;
+
+	if (REQUEST_DEVICETOHOST_CLASS_INTERFACE == requestType)
+	{
+		if (CDC_GET_LINE_CODING == r)
+		{
+			USB_SendControl(0,(void*)&_usbLineInfo,7);
+			return true;
+		}
+	}
+
+	if (REQUEST_HOSTTODEVICE_CLASS_INTERFACE == requestType)
+	{
+		if (CDC_SET_LINE_CODING == r)
+		{
+			USB_RecvControl((void*)&_usbLineInfo,7);
+			return true;
+		}
+
+		if (CDC_SET_CONTROL_LINE_STATE == r)
+		{
+			_usbLineInfo.lineState = setup.wValueL;
+			if (_usbLineInfo.dwDTERate == 115200 && _usbLineInfo.lineState == 0)	// Emulate DTR reset hack
+				Reboot();
+			return true;
+		}
+	}
+	return false;
+}
+
+
+int _serialPeek = -1;
+void Serial_::begin(uint16_t baud_count)
+{
+}
+
+void Serial_::end(void)
+{
+}
+
+int Serial_::available(void)
+{
+	u8 avail = USB_Available(CDC_RX);
+	if (_serialPeek != -1)
+		avail++;
+	return avail;
+}
+
+//	peek is nasty
+int Serial_::peek(void)
+{
+	if (_serialPeek == -1)
+		_serialPeek = read();
+	return _serialPeek;
+}
+
+int Serial_::read(void)
+{
+	int c;
+	if (_serialPeek != -1)
+	{
+		c = _serialPeek;
+		_serialPeek = -1;
+	} else {
+		c = USB_Recv(CDC_RX);
+	}
+	return c;
+}
+
+void Serial_::flush(void)
+{
+	USB_Flush(CDC_TX);
+}
+
+void Serial_::write(uint8_t c)
+{
+	USB_Send(CDC_TX,&c,1);
+}
+
+Serial_ Serial;
+
+#endif