Fix bin size of LPC15xx devices

[antonverburg]

When compiling and objcopy for LPC15xx devices, the content of RAM is included in the bin file ,resulting in a large firmware.bin file. In order to ommit this, please add the flags "-R.heap -R.bss -R.stack_dummy" to the objcopy command in main.py, function ElfToBin, line 54 to 63:

platform-nxplpc/builder/main.py

Lines 54 to 63 in d4be89b

	ElfToBin=Builder(
	action=env.VerboseAction(" ".join([
	"$OBJCOPY",
	"-O",
	"binary",
	"$SOURCES",
	"$TARGET"
	]), "Building $TARGET"),
	suffix=".bin"
	),

[antonverburg]

See also this discussion: https://community.platformio.org/t/programing-nxp-lpc-via-usb-as-a-flash-disk-usb-isp-msc/22542/5

[valeros]

Hi @antonverburg ! Could you please provide some instructions on how to reproduce the problem?

[antonverburg]

Just generate a bin file for LPC1549, that will be way too big to copy to USB-mounted LPC device in USB programming mode. So it should be stripped.