Bugfix jg aurora a1 #27621
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Bugfix jg aurora a1 #27621
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added 3 commits
January 4, 2025 12:49
The SysTick interrupt was enabled by the jgaurora bootloader and stays enabled when it has jumped to the application. This causes issues because the interrupt handling routine increments specific RAM locations. When compiling the jgaurora A1 with a non-maple configuration this causes problems because this specific memory location is reused for GPIOA_BASE. Effectively it becomes unable to use GPIOA. Another side effect is that the bootloader also puts some function pointers in RAM and will periodically call those functions. When this happens after datainit or zerobss (with enough memory to init/zero) it will result in a hard fault exception.
As JG aurora has no direct USB connection on the board. The USB stack can be disabled to save RAM and flash.
In order to use the JG aurora A1 without a SD card inserted FLASH_EEPROM_EMULATION needs to be enabled.
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Description
The public available JG aurora firmware at https://firmware.jgmakerwiki.com/ is quite old and uses the maple stack.
In an attempt to update the firmware for my A1 I found and solved some blocking issues.
Requirements
JG aurora A1
Benefits
Fixes hard fault on application start.
Fixes the ability to use the GPIOA port again (heaters and fan)
Save RAM and flash to disable unused USB
Provide EEPROM trough flash (just like the old firmware did)
Configurations
jgaurora default config
Related Issues
n.a.