Add bigboot support to USB-MCUs and correct wrong bootsize for atmega…

…16u4
Optiboot · Oct 3, 2021 · 91e55f2 · 91e55f2
1 parent 89ea5b2
commit 91e55f2
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Showing 4 changed files with 248 additions and 16 deletions.
diff --git a/optiboot/bootloaders/optiboot/Makefile.usbmcus b/optiboot/bootloaders/optiboot/Makefile.usbmcus
@@ -22,8 +22,12 @@ HELPTEXT += "target atmega8/16/32u2, atmega16/32u4 - newer 32/44pin AVR-USB-MCUs
 atmega8u2atUART: TARGET = atmega8u2
 atmega8u2atUART: MCU_TARGET = atmega8u2
 atmega8u2atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
-atmega8u2atUART: AVR_FREQ ?= 16000000L 
+atmega8u2atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
 atmega8u2atUART: LDSECTIONS = -Wl,--section-start=.text=0x1e00 -Wl,--section-start=.version=0x1ffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega8u2atUART: LDSECTIONS = -Wl,--section-start=.text=0x1c00 -Wl,--section-start=.version=0x1ffe
+endif
 atmega8u2atUART: $(PROGRAM)_atmega8u2_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
 ifndef PRODUCTION
 atmega8u2atUART: $(PROGRAM)_atmega8u2_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
@@ -34,7 +38,11 @@ atmega8u2:
 atmega8u2_isp: atmega8u2
 atmega8u2_isp: TARGET = atmega8u2
 atmega8u2_isp: MCU_TARGET = atmega8u2
-atmega8u2_isp: HFUSE ?= DE# = 512 byte boot, JTAG disabled
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega8u2_isp: HFUSE ?= DE# = 512 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega8u2_isp: HFUSE ?= DC# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
 atmega8u2_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
 atmega8u2_isp: EFUSE ?= FE# = 2.7V brownout
 atmega8u2_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
@@ -48,8 +56,12 @@ atmega8u2_isp: isp
 atmega16u2atUART: TARGET = atmega16u2
 atmega16u2atUART: MCU_TARGET = atmega16u2
 atmega16u2atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
-atmega16u2atUART: AVR_FREQ ?= 16000000L 
+atmega16u2atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
 atmega16u2atUART: LDSECTIONS = -Wl,--section-start=.text=0x3e00 -Wl,--section-start=.version=0x3ffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega16u2atUART: LDSECTIONS = -Wl,--section-start=.text=0x3c00 -Wl,--section-start=.version=0x3ffe
+endif
 atmega16u2atUART: $(PROGRAM)_atmega16u2_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
 ifndef PRODUCTION
 atmega16u2atUART: $(PROGRAM)_atmega16u2_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
@@ -60,7 +72,11 @@ atmega16u2:
 atmega16u2_isp: atmega16u2
 atmega16u2_isp: TARGET = atmega16u2
 atmega16u2_isp: MCU_TARGET = atmega16u2
-atmega16u2_isp: HFUSE ?= DE# = 512 byte boot, JTAG disabled
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega16u2_isp: HFUSE ?= DE# = 512 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega16u2_isp: HFUSE ?= DC# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
 atmega16u2_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
 atmega16u2_isp: EFUSE ?= FE# = 2.7V brownout
 atmega16u2_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
@@ -74,8 +90,12 @@ atmega16u2_isp: isp
 atmega32u2atUART: TARGET = atmega32u2
 atmega32u2atUART: MCU_TARGET = atmega32u2
 atmega32u2atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
-atmega32u2atUART: AVR_FREQ ?= 16000000L 
+atmega32u2atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
 atmega32u2atUART: LDSECTIONS = -Wl,--section-start=.text=0x7e00 -Wl,--section-start=.version=0x7ffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega32u2atUART: LDSECTIONS = -Wl,--section-start=.text=0x7c00 -Wl,--section-start=.version=0x7ffe
+endif
 atmega32u2atUART: $(PROGRAM)_atmega32u2_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
 ifndef PRODUCTION
 atmega32u2atUART: $(PROGRAM)_atmega32u2_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
@@ -86,7 +106,11 @@ atmega32u2:
 atmega32u2_isp: atmega32u2
 atmega32u2_isp: TARGET = atmega32u2
 atmega32u2_isp: MCU_TARGET = atmega32u2
-atmega32u2_isp: HFUSE ?= DE# = 512 byte boot, JTAG disabled
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega32u2_isp: HFUSE ?= DE# = 512 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega32u2_isp: HFUSE ?= DC# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
 atmega32u2_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
 atmega32u2_isp: EFUSE ?= FE# = 2.7V brownout
 atmega32u2_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
@@ -100,8 +124,12 @@ atmega32u2_isp: isp
 atmega16u4atUART: TARGET = atmega16u4
 atmega16u4atUART: MCU_TARGET = atmega16u4
 atmega16u4atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
-atmega16u4atUART: AVR_FREQ ?= 16000000L 
-atmega16u4atUART: LDSECTIONS = -Wl,--section-start=.text=0x7e00 -Wl,--section-start=.version=0x7ffe
+atmega16u4atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega16u4atUART: LDSECTIONS = -Wl,--section-start=.text=0x3e00 -Wl,--section-start=.version=0x3ffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega16u4atUART: LDSECTIONS = -Wl,--section-start=.text=0x3c00 -Wl,--section-start=.version=0x3ffe
+endif
 atmega16u4atUART: $(PROGRAM)_atmega16u4_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
 ifndef PRODUCTION
 atmega16u4atUART: $(PROGRAM)_atmega16u4_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
@@ -113,7 +141,11 @@ atmega16u4:
 atmega16u4_isp: atmega16u4
 atmega16u4_isp: TARGET = atmega16u4
 atmega16u4_isp: MCU_TARGET = atmega16u4
-atmega16u4_isp: HFUSE ?= DE# = 512 byte boot, JTAG disabled
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega16u4_isp: HFUSE ?= DE# = 512 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega16u4_isp: HFUSE ?= DC# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
 atmega16u4_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
 atmega16u4_isp: EFUSE ?= FB# = 2.6V brownout
 atmega16u4_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
@@ -127,8 +159,12 @@ atmega16u4_isp: isp
 atmega32u4atUART: TARGET = atmega32u4
 atmega32u4atUART: MCU_TARGET = atmega32u4
 atmega32u4atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
-atmega32u4atUART: AVR_FREQ ?= 16000000L 
+atmega32u4atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
 atmega32u4atUART: LDSECTIONS = -Wl,--section-start=.text=0x7e00 -Wl,--section-start=.version=0x7ffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega32u4atUART: LDSECTIONS = -Wl,--section-start=.text=0x7c00 -Wl,--section-start=.version=0x7ffe
+endif
 atmega32u4atUART: $(PROGRAM)_atmega32u4_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
 ifndef PRODUCTION
 atmega32u4atUART: $(PROGRAM)_atmega32u4_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
@@ -140,7 +176,11 @@ atmega32u4:
 atmega32u4_isp: atmega32u4
 atmega32u4_isp: TARGET = atmega32u4
 atmega32u4_isp: MCU_TARGET = atmega32u4
-atmega32u4_isp: HFUSE ?= DE# = 512 byte boot, JTAG disabled
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega32u4_isp: HFUSE ?= DE# = 512 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega32u4_isp: HFUSE ?= DC# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
 atmega32u4_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
 atmega32u4_isp: EFUSE ?= FB# = 2.6V brownout
 atmega32u4_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
@@ -154,22 +194,174 @@ atmega32u4_isp: isp
 atmega32u6atUART: TARGET = atmega32u6
 atmega32u6atUART: MCU_TARGET = atmega32u6
 atmega32u6atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
-atmega32u6atUART: AVR_FREQ ?= 16000000L 
+atmega32u6atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
 atmega32u6atUART: LDSECTIONS = -Wl,--section-start=.text=0x7e00 -Wl,--section-start=.version=0x7ffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega32u6atUART: LDSECTIONS = -Wl,--section-start=.text=0x7c00 -Wl,--section-start=.version=0x7ffe
+endif
 atmega32u6atUART: $(PROGRAM)_atmega32u6_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
 ifndef PRODUCTION
 atmega32u6atUART: $(PROGRAM)_atmega32u6_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
 endif
 atmega32u6:
-# disable blinking the LED to make the bootloader to fit in 512 Bytes Bootsection
 	"$(MAKE)" atmega32u6atUART UART?=1
 
 atmega32u6_isp: atmega32u6
 atmega32u6_isp: TARGET = atmega32u6
-atmega32u6_isp: MCU_TARGET = atmega32u6
-atmega32u6_isp: HFUSE ?= DE# = 512 byte boot, JTAG disabled
+atmega32u6_isp: MCU_TARGET = atmega32u6	
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+atmega32u6_isp: HFUSE ?= DE# = 512 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 1024 Bytes long; starts earlier
+atmega32u6_isp: HFUSE ?= DC# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
 atmega32u6_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
 atmega32u6_isp: EFUSE ?= FB# = 2.6V brownout
 atmega32u6_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
 atmega32u6_isp: isp
 
+
+#-----------------------
+# AT90USB646
+#-----------------------
+#at90usb646
+at90usb646atUART: TARGET = at90usb646
+at90usb646atUART: MCU_TARGET = at90usb646
+at90usb646atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
+at90usb646atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 512 Bytes long; starts earlier
+at90usb646atUART: LDSECTIONS = -Wl,--section-start=.text=0xfc00 -Wl,--section-start=.version=0xfffe
+else ## bigboot version is 1024 Bytes long; starts earlier
+at90usb646atUART: LDSECTIONS = -Wl,--section-start=.text=0xf800 -Wl,--section-start=.version=0xfffe
+endif
+at90usb646atUART: $(PROGRAM)_at90usb646_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
+ifndef PRODUCTION
+at90usb646atUART: $(PROGRAM)_at90usb646_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
+endif
+at90usb646:
+	"$(MAKE)" at90usb646atUART UART?=1
+
+at90usb646_isp: at90usb646
+at90usb646_isp: TARGET = at90usb646
+at90usb646_isp: MCU_TARGET = at90usb646
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb646_isp: HFUSE ?= DE# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb646_isp: HFUSE ?= DC# = 2048 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
+at90usb646_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
+at90usb646_isp: EFUSE ?= FB# = 2.6V brownout
+at90usb646_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
+at90usb646_isp: isp
+
+
+#-----------------------
+# AT90USB647
+#-----------------------
+#at90usb647
+at90usb647atUART: TARGET = at90usb647
+at90usb647atUART: MCU_TARGET = at90usb647
+at90usb647atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
+at90usb647atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb647atUART: LDSECTIONS = -Wl,--section-start=.text=0xfc00 -Wl,--section-start=.version=0xfffe
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb647atUART: LDSECTIONS = -Wl,--section-start=.text=0xf800 -Wl,--section-start=.version=0xfffe
+endif
+at90usb647atUART: $(PROGRAM)_at90usb647_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
+ifndef PRODUCTION
+at90usb647atUART: $(PROGRAM)_at90usb647_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
+endif
+at90usb647:
+	"$(MAKE)" at90usb647atUART UART?=1
+
+at90usb647_isp: at90usb647
+at90usb647_isp: TARGET = at90usb647
+at90usb647_isp: MCU_TARGET = at90usb647	
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb647_isp: HFUSE ?= DE# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb647_isp: HFUSE ?= DC# = 2048 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
+at90usb647_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
+at90usb647_isp: EFUSE ?= FB# = 2.6V brownout
+at90usb647_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
+at90usb647_isp: isp
+
+
+#-----------------------
+# AT90USB1286
+#-----------------------
+#at90usb1286
+at90usb1286atUART: TARGET = at90usb1286
+at90usb1286atUART: MCU_TARGET = at90usb1286
+at90usb1286atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
+at90usb1286atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb1286atUART: LDSECTIONS = -Wl,--section-start=.text=0x1fc00 -Wl,--section-start=.version=0x1fffe
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb1286atUART: LDSECTIONS = -Wl,--section-start=.text=0x1f800 -Wl,--section-start=.version=0x1fffe
+endif
+at90usb1286atUART: $(PROGRAM)_at90usb1286_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
+ifndef PRODUCTION
+at90usb1286atUART: $(PROGRAM)_at90usb1286_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
+endif
+at90usb1286:
+	"$(MAKE)" at90usb1286atUART UART?=1
+
+at90usb1286_isp: at90usb1286
+at90usb1286_isp: TARGET = at90usb1286
+at90usb1286_isp: MCU_TARGET = at90usb1286	
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb1286_isp: HFUSE ?= DE# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb1286_isp: HFUSE ?= DC# = 2048 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
+at90usb1286_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
+at90usb1286_isp: EFUSE ?= FB# = 2.6V brownout
+at90usb1286_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
+at90usb1286_isp: isp
+
+
+#-----------------------
+# AT90USB1287
+#-----------------------
+#at90usb1287
+at90usb1287atUART: TARGET = at90usb1287
+at90usb1287atUART: MCU_TARGET = at90usb1287
+at90usb1287atUART: CFLAGS += $(COMMON_OPTIONS) $(UART_CMD)
+at90usb1287atUART: AVR_FREQ ?= 16000000L
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb1287atUART: LDSECTIONS = -Wl,--section-start=.text=0x1fc00 -Wl,--section-start=.version=0x1fffe
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb1287atUART: LDSECTIONS = -Wl,--section-start=.text=0x1f800 -Wl,--section-start=.version=0x1fffe
+endif
+#at90usb1287atUART: OUTPUT_FILE_ROOT=$(PROGRAM)_$(TARGET)_UART${UART:-"d_d"}_$(BAUD_RATE)_$(AVR_FREQ)
+#at90usb1287atUART: $(OUTPUT_FILE_ROOT).hex
+test=atm1
+at90usb1287atUART: $(PROGRAM)_${test:-"ddd"}_UART${UART_CMD:-"d_d"}_$(BAUD_RATE)_$(AVR_FREQ).hex
+
+#at90usb1287atUART: $(PROGRAM)_at90usb1287_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).hex
+ifndef PRODUCTION
+#at90usb1287atUART: $(PROGRAM)_$(TARGET)_UART$(UART)_$(BAUD_RATE)_$(AVR_FREQ).lst
+
+#at90usb1287atUART: $(OUTPUT_FILE_ROOT).lst
+#at90usb1287atUART: $(PROGRAM)_at90usb1287_UART${UART:? "d_d"}_$(BAUD_RATE)_$(AVR_FREQ).lst
+at90usb1287atUART: $(PROGRAM)_at90usb1287_${(UART):-"d_d"}_$(BAUD_RATE)_$(AVR_FREQ).lst
+endif
+at90usb1287:
+	"$(MAKE)" at90usb1287atUART UART?=1
+
+at90usb1287_isp: at90usb1287
+at90usb1287_isp: TARGET = at90usb1287
+at90usb1287_isp: MCU_TARGET = at90usb1287	
+ifndef BIGBOOT ## standard version is 1024 Bytes long; starts earlier
+at90usb1287_isp: HFUSE ?= DE# = 1024 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+else ## bigboot version is 2048 Bytes long; starts earlier
+at90usb1287_isp: HFUSE ?= DC# = 2048 byte boot, SPI (ISP!!!) enabled, JTAG disabled
+endif
+at90usb1287_isp: LFUSE ?= FF# = Full Swing xtal (16MHz) 16KCK/14CK+65ms
+at90usb1287_isp: EFUSE ?= FB# = 2.6V brownout
+at90usb1287_isp: LOCK  ?= 2F# = APP protect mode 1, BL protect mode 2
+at90usb1287_isp: isp
+
diff --git a/optiboot/bootloaders/optiboot/makeall.usbmcus.sh b/optiboot/bootloaders/optiboot/makeall.usbmcus.sh
@@ -43,6 +43,10 @@ declare -a mcu_and_params=(
 "atmega16u4"  "LED=C7 LED_START_FLASHES=0 UART=1" # disable blinking the LED to make the bootloader to fit in 512 Bytes Bootsection
 "atmega32u4"  "LED=C7 LED_START_FLASHES=0 UART=1" # disable blinking the LED to make the bootloader to fit in 512 Bytes Bootsection
 "atmega32u6"  "LED=C6 LED_START_FLASHES=2 UART=1" # for some reason it is not necessary to disable blinking the LED for this device
+"at90usb646"  "LED=C6 LED_START_FLASHES=2 UART=1 BIGBOOT=1" # enable bigboot since at90usbXYZS devices have minimal bootsection of 1048 Bytes
+"at90usb647"  "LED=C6 LED_START_FLASHES=2 UART=1 BIGBOOT=1" # enable bigboot since at90usbXYZS devices have minimal bootsection of 1048 Bytes
+"at90usb1286"  "LED=C6 LED_START_FLASHES=2 UART=1 BIGBOOT=1" # enable bigboot since at90usbXYZS devices have minimal bootsection of 1048 Bytes
+"at90usb1287"  "LED=C6 LED_START_FLASHES=2 UART=1 BIGBOOT=1" # enable bigboot since at90usbXYZS devices have minimal bootsection of 1048 Bytes
 )
 
 declare -a clock_and_baud=(

diff --git a/optiboot/bootloaders/optiboot/makeoptions b/optiboot/bootloaders/optiboot/makeoptions
@@ -36,3 +36,27 @@ make atmega328 UART=1
 #invalid bit rates
 make atmega328 BAUD_RATE=300
 make atmega328 BAUD_RATE=3000000
+
+# ===========\
+# usbmcus   ==>
+# ===========/
+
+# atmegaXYu4
+make atmega8u2 LED=D5 BAUD_RATE=115200 # default
+make atmega16u2 LED=D5 BAUD_RATE=115200 # default
+make atmega32u2 LED=D5 BAUD_RATE=115200 # default
+
+# atmegaXYu4
+# disable led blinking at startup to save memory
+make atmega16u4 LED=C7 LED_START_FLASHES=0 # default
+make atmega32u4 LED=C7 LED_START_FLASHES=0 # default
+# use a 1048 Byte bootsection to enable the led
+make atmega16u4 LED=C7 LED_START_FLASHES=2 BIGBOOT=1
+make atmega32u4 LED=C7 LED_START_FLASHES=2 BIGBOOT=1
+make atmega32u6 LED=C6 LED_START_FLASHES=2 # default
+
+# at90usbXYZ6/7
+make at90usb646 LED=C6 LED_START_FLASHES=2 BIGBOOT=1 # default
+make at90usb647 LED=C6 LED_START_FLASHES=2 BIGBOOT=1 # default
+make at90usb1286 LED=C6 LED_START_FLASHES=2 BIGBOOT=1 # default
+make at90usb1287 LED=C6 LED_START_FLASHES=2 BIGBOOT=1 # default
diff --git a/optiboot/bootloaders/optiboot/pin_defs.h b/optiboot/bootloaders/optiboot/pin_defs.h
@@ -483,7 +483,9 @@
 
 /*------------------------------------------------------------------------ */
 #if defined(__AVR_ATmega8U2__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) \
-|| (__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega32U6__)
+|| defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega32U6__) \
+|| defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) \
+|| defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
 /*------------------------------------------------------------------------ */
 /* Fix different register names */
 #define MPCM0   MPCM1
@@ -549,6 +551,16 @@
 #endif
 #endif // AtmegaXYu6
 
+/*------------------------------------------------------------------------ */
+#if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) \
+|| defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
+/*------------------------------------------------------------------------ */
+
+#if !defined(LED)
+#define LED         C6 // because of PWM (OSC3A)
+#endif
+#endif // At90usbXYz6/7
+
 
 #endif // usbmcus