Building firmware with gcc

[ant9000]

@tormod

I have done some great progress. Since the display was not coming up, and I have no JTAG or serial connection, I explored the possibilities of the 1-bit debug facility that is the function generator output I hooked up a voltmeter to the output, and modified the code to not control the pin from a timer, but as a normal output pin I could toggle manually.

Congrads Tormod, clever idea! And great news, too: you are getting very close.

@tormod

EDIT: I pushed the fixes to my gcc branch, but you will have to disable USB_Init yourself, since the gcc branch should stay in working state for IAR as well.

To make USB_Init work I guess you need to apply to the APP and LIB ASM_Function.s the same kind of massaging I’ve done with IAR’s linker directives - see the the changes on the svn here.

I have not tried on gcc yet, but instructing the linker to place code at a fixed address does not seem to be much harder than it has been with IAR, judging by this thread: How to locate variable at fixed address?

You should be able to quickly poke at the linker config files, and then modify your iar2gas script in order to translate the relevant instructions from IAR jargon to gcc parlance.

Antonio