Properly configure bootloader size in **Makefile**. With wrong section size bootloader won't probably start with **Magic command** and **Boot Magic**.
```
# Size of Bootloaders in bytes:
-# Atmel DFU loader(ATmega32U4) 4096
-# Atmel DFU loader(AT90USB128) 8192
-# LUFA bootloader(ATmega32U4) 4096
-# Arduino Caterina(ATmega32U4) 4096
-# USBaspLoader(ATmega***) 2048
-# Teensy halfKay(ATmega32U4) 512
+# Atmel DFU loader(ATmega32U4) 4096
+# Atmel DFU loader(AT90USB128) 8192
+# LUFA bootloader(ATmega32U4) 4096
+# Arduino Caterina(ATmega32U4) 4096
+# USBaspLoader(ATmega***) 2048
+# Teensy halfKay(ATmega32U4) 512
# Teensy++ halfKay(AT90USB128) 2048
OPT_DEFS += -DBOOTLOADER_SIZE=4096
```
| | | |
| | | |
| Application | | Application |
- | | | |
+ | | | |
= = = =
| | 32KB-4KB | | 128KB-8KB
0x6000 +---------------+ 0x1E000 +---------------+
| Bootloader | 4KB | Bootloader | 8KB
0x7FFF +---------------+ 0x1FFFF +---------------+
-
+
byte Teensy(ATMega32u4) byte Teensy++(AT90SUB1286)
0x0000 +---------------+ 0x00000 +---------------+
| | | |
## Problem on BIOS (UEFI)/Resume (Sleep & Wake)/Power Cycles
Some people reported their keyboard stops working on BIOS and/or after resume(power cycles).
-As of now root of its cause is not clear but some build options seem to be related. In Makefile try to disable those options like `CONSOLE_ENABLE`, `NKRO_ENABLE`, `SLEEP_LED_ENABLE` and/or others.
+As of now root of its cause is not clear but some build options seem to be related. In Makefile try to disable those options like `CONSOLE_ENABLE`, `NKRO_ENABLE`, `SLEEP_LED_ENABLE` and/or others.
https://github.com/tmk/tmk_keyboard/issues/266
https://geekhack.org/index.php?topic=41989.msg1967778#msg1967778