This is a relatively significant edit that brings the Arduino copy of

optiboot up-to-date with the optiboot source repository as of Jun-2011
(the last changes made in the optiboot repository were in Oct-2010)

This adds support for several plaforms, fixes the "30k bug", and
refactors the source to have separate stk500.h, boot.h, and pin_defs.h

These are the arduino opticode issues fixed:
http://code.google.com/p/arduino/issues/detail?id=380
    optiboot has problems upload sketches bigger than 30 KB
http://code.google.com/p/arduino/issues/detail?id=556
    update optiboot to the point of the latest optiboot project sources.

These are issues that had been solved in the optiboot source aready:
http://code.google.com/p/arduino/issues/detail?id=364
   optiboot leaves timer1 configured when starting app, breaks PWM on
   pin 9 and 10.  (fixed with a workaround in arduino core.)
   aka http://code.google.com/p/optiboot/source/detail?r=c778fbe72df6ac13ef730c25283358c3c970f73e
   Support for ATmega8 and mega88.
   Fix fuse settings for mega168 _ISP targets
   Additional new platforms (mega, sanguino)

http://code.google.com/p/optiboot/issues/detail?id=26
   Set R1 to 0  (already in arduino code)
http://code.google.com/p/optiboot/issues/detail?id=36&can=1
   Fails to build correctly for mega88

After this commit, the only differences between the Arduino optiboot.c
and the optiboot repository optiboot.c are cosmetic.

Author: WestfW

hardware/arduino/bootloaders/optiboot/Makefile

@@ -123,12 +123,23 @@ OBJDUMP        = $(call fixpath,$(GCCROOT)avr-objdump)
 
 SIZE           = $(GCCROOT)avr-size
 
+# Test platforms
+# Virtual boot block test
+virboot328: TARGET = atmega328
+virboot328: MCU_TARGET = atmega328p
+virboot328: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200' '-DVIRTUAL_BOOT'
+virboot328: AVR_FREQ = 16000000L
+virboot328: LDSECTION  = --section-start=.text=0x7e00
+virboot328: $(PROGRAM)_atmega328.hex
+virboot328: $(PROGRAM)_atmega328.lst
+
 # 20MHz clocked platforms
 #
 # These are capable of 230400 baud, or 115200 baud on PC (Arduino Avrdude issue)
 #
 
 pro20: TARGET = pro_20mhz
+pro20: MCU_TARGET = atmega168
 pro20: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
 pro20: AVR_FREQ = 20000000L
 pro20: $(PROGRAM)_pro_20mhz.hex
@@ -141,7 +152,7 @@ pro20_isp: HFUSE = DD
 # Full swing xtal (20MHz) 258CK/14CK+4.1ms
 pro20_isp: LFUSE = C6
 # 512 byte boot
-pro20_isp: EFUSE = 02
+pro20_isp: EFUSE = 04
 pro20_isp: isp
 
 # 16MHz clocked platforms
@@ -150,6 +161,7 @@ pro20_isp: isp
 #
 
 pro16: TARGET = pro_16MHz
+pro16: MCU_TARGET = atmega168
 pro16: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
 pro16: AVR_FREQ = 16000000L
 pro16: $(PROGRAM)_pro_16MHz.hex
@@ -162,12 +174,13 @@ pro16_isp: HFUSE = DD
 # Full swing xtal (20MHz) 258CK/14CK+4.1ms
 pro16_isp: LFUSE = C6
 # 512 byte boot
-pro16_isp: EFUSE = 02
+pro16_isp: EFUSE = 04
 pro16_isp: isp
 
 # Diecimila and NG use identical bootloaders
 #
 diecimila: TARGET = diecimila
+diecimila: MCU_TARGET = atmega168
 diecimila: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
 diecimila: AVR_FREQ = 16000000L 
 diecimila: $(PROGRAM)_diecimila.hex
@@ -180,7 +193,7 @@ diecimila_isp: HFUSE = DD
 # Low power xtal (16MHz) 16KCK/14CK+65ms
 diecimila_isp: LFUSE = FF
 # 512 byte boot
-diecimila_isp: EFUSE = 02
+diecimila_isp: EFUSE = 04
 diecimila_isp: isp
 
 atmega328: TARGET = atmega328
@@ -194,21 +207,104 @@ atmega328: $(PROGRAM)_atmega328.lst
 atmega328_isp: atmega328
 atmega328_isp: TARGET = atmega328
 atmega328_isp: MCU_TARGET = atmega328p
-# 512 byte boot
+# 512 byte boot, SPIEN
 atmega328_isp: HFUSE = DE
 # Low power xtal (16MHz) 16KCK/14CK+65ms
 atmega328_isp: LFUSE = FF
 # 2.7V brownout
 atmega328_isp: EFUSE = 05
 atmega328_isp: isp
 
+# Sanguino has a minimum boot size of 1024 bytes, so enable extra functions
+#
+sanguino: TARGET = atmega644p
+sanguino: MCU_TARGET = atmega644p
+sanguino: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200' '-DBIGBOOT'
+sanguino: AVR_FREQ = 16000000L
+sanguino: LDSECTION  = --section-start=.text=0xfc00
+sanguino: $(PROGRAM)_atmega644p.hex
+sanguino: $(PROGRAM)_atmega644p.lst
+
+sanguino_isp: sanguino
+sanguino_isp: TARGET = atmega644p
+sanguino_isp: MCU_TARGET = atmega644p
+# 1024 byte boot
+sanguino_isp: HFUSE = DE
+# Low power xtal (16MHz) 16KCK/14CK+65ms
+sanguino_isp: LFUSE = FF
+# 2.7V brownout
+sanguino_isp: EFUSE = 05
+sanguino_isp: isp
+
+# Mega has a minimum boot size of 1024 bytes, so enable extra functions
+#mega: TARGET = atmega1280
+mega: MCU_TARGET = atmega1280
+mega: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200' '-DBIGBOOT'
+mega: AVR_FREQ = 16000000L
+mega: LDSECTION  = --section-start=.text=0x1fc00
+mega: $(PROGRAM)_atmega1280.hex
+mega: $(PROGRAM)_atmega1280.lst
+
+mega_isp: mega
+mega_isp: TARGET = atmega1280
+mega_isp: MCU_TARGET = atmega1280
+# 1024 byte boot
+mega_isp: HFUSE = DE
+# Low power xtal (16MHz) 16KCK/14CK+65ms
+mega_isp: LFUSE = FF
+# 2.7V brownout
+mega_isp: EFUSE = 05
+mega_isp: isp
+
+# ATmega8
+#
+atmega8: TARGET = atmega8
+atmega8: MCU_TARGET = atmega8
+atmega8: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
+atmega8: AVR_FREQ = 16000000L 
+atmega8: LDSECTION  = --section-start=.text=0x1e00
+atmega8: $(PROGRAM)_atmega8.hex
+atmega8: $(PROGRAM)_atmega8.lst
+
+atmega8_isp: atmega8
+atmega8_isp: TARGET = atmega8
+atmega8_isp: MCU_TARGET = atmega8
+# SPIEN, CKOPT, Bootsize=512B
+atmega8_isp: HFUSE = CC
+# 2.7V brownout, Low power xtal (16MHz) 16KCK/14CK+65ms
+atmega8_isp: LFUSE = BF
+atmega8_isp: isp
+
+# ATmega88
+#
+atmega88: TARGET = atmega88
+atmega88: MCU_TARGET = atmega88
+atmega88: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
+atmega88: AVR_FREQ = 16000000L 
+atmega88: LDSECTION  = --section-start=.text=0x1e00
+atmega88: $(PROGRAM)_atmega88.hex
+atmega88: $(PROGRAM)_atmega88.lst
+
+atmega88_isp: atmega88
+atmega88_isp: TARGET = atmega88
+atmega88_isp: MCU_TARGET = atmega88
+# 2.7V brownout
+atmega88_isp: HFUSE = DD
+# Low power xtal (16MHz) 16KCK/14CK+65ms
+atemga88_isp: LFUSE = FF
+# 512 byte boot
+atmega88_isp: EFUSE = 04
+atmega88_isp: isp
+
+
 # 8MHz clocked platforms
 #
 # These are capable of 115200 baud
 #
 
 lilypad: TARGET = lilypad
-lilypad: CFLAGS += '-DLED_START_FLASHES=3' '-DSOFT_UART' '-DBAUD_RATE=115200'
+lilypad: MCU_TARGET = atmega168
+lilypad: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
 lilypad: AVR_FREQ = 8000000L
 lilypad: $(PROGRAM)_lilypad.hex
 lilypad: $(PROGRAM)_lilypad.lst
@@ -220,11 +316,12 @@ lilypad_isp: HFUSE = DD
 # Internal 8MHz osc (8MHz) Slow rising power
 lilypad_isp: LFUSE = E2
 # 512 byte boot
-lilypad_isp: EFUSE = 02
+lilypad_isp: EFUSE = 04
 lilypad_isp: isp
 
 lilypad_resonator: TARGET = lilypad_resonator
-lilypad_resonator: CFLAGS += '-DLED_START_FLASHES=3' '-DSOFT_UART' '-DBAUD_RATE=115200'
+lilypad_resonator: MCU_TARGET = atmega168
+lilypad_resonator: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
 lilypad_resonator: AVR_FREQ = 8000000L
 lilypad_resonator: $(PROGRAM)_lilypad_resonator.hex
 lilypad_resonator: $(PROGRAM)_lilypad_resonator.lst
@@ -236,11 +333,12 @@ lilypad_resonator_isp: HFUSE = DD
 # Full swing xtal (20MHz) 258CK/14CK+4.1ms
 lilypad_resonator_isp: LFUSE = C6
 # 512 byte boot
-lilypad_resonator_isp: EFUSE = 02
+lilypad_resonator_isp: EFUSE = 04
 lilypad_resonator_isp: isp
 
 pro8: TARGET = pro_8MHz
-pro8: CFLAGS += '-DLED_START_FLASHES=3' '-DSOFT_UART' '-DBAUD_RATE=115200'
+pro8: MCU_TARGET = atmega168
+pro8: CFLAGS += '-DLED_START_FLASHES=3' '-DBAUD_RATE=115200'
 pro8: AVR_FREQ = 8000000L
 pro8: $(PROGRAM)_pro_8MHz.hex
 pro8: $(PROGRAM)_pro_8MHz.lst
@@ -252,7 +350,7 @@ pro8_isp: HFUSE = DD
 # Full swing xtal (20MHz) 258CK/14CK+4.1ms
 pro8_isp: LFUSE = C6
 # 512 byte boot
-pro8_isp: EFUSE = 02
+pro8_isp: EFUSE = 04
 pro8_isp: isp
 
 atmega328_pro8: TARGET = atmega328_pro_8MHz
@@ -266,7 +364,7 @@ atmega328_pro8: $(PROGRAM)_atmega328_pro_8MHz.lst
 atmega328_pro8_isp: atmega328_pro8
 atmega328_pro8_isp: TARGET = atmega328_pro_8MHz
 atmega328_pro8_isp: MCU_TARGET = atmega328p
-# 512 byte boot
+# 512 byte boot, SPIEN
 atmega328_pro8_isp: HFUSE = DE
 # Low power xtal (16MHz) 16KCK/14CK+65ms
 atmega328_pro8_isp: LFUSE = FF
@@ -299,6 +397,11 @@ luminet_isp: LFUSE = 62
 luminet_isp: EFUSE = FE
 luminet_isp: isp
 
+#
+# Generic build instructions
+#
+#
+
 isp: $(TARGET)
 	$(ISPFUSES)
 	$(ISPFLASH)