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e4c0e2b73d
This commit adds an optional configuration option for the ESP8266 port that, if the board rebooted due to a crash, will print to stdout some information about the error that triggered the issue. It is not possible using regular SDK functions to intercept errors and print information at that stage, and the only error response from the board is to reboot itself. This is the next best thing, print some error information just once at boot time after the crash - the least invasive option given the situation we're in. This is disabled by default, and can be enabled by enabling MICROPY_HW_HARD_FAULT_DEBUG in the port configuration - obviously with a small increase in the firmware code footprint. Signed-off-by: Alessandro Gatti <a.gatti@frob.it>