DFU SD 8.1 Non-functional W/ GCC

RE: DFU SD 8.1 Non-functional W/ GCC

Morten Kristiansen — Tue, 10 Nov 2015 11:49:49 GMT

You can just remove R7 from the list of registers maintained manually. The code never return anyway, so GCC has no use for the scratch list. Hence: ... ".align\t\n" :: "r" (start_addr) // Argument list for the gcc assembly. start_addr is %0. // List of register maintained manually, omitted. Code never returns.

RE: DFU SD 8.1 Non-functional W/ GCC

Lucas — Tue, 16 Jun 2015 15:18:46 GMT

I am using an xxac and have selected the associated linker script. I am using a custom board and have changed the clock source to the RC. The project I have works fine with 8.0, but something in 8.1 broke it.

Also, I notice that the linker script associated with the new 8.1 bootloader starts its general ram space at 0x20002C00 instead of 0x20002000. What is the reason for this?

RE: DFU SD 8.1 Non-functional W/ GCC

Stian Røed Hafskjold — Tue, 16 Jun 2015 11:25:16 GMT

To enable debugging, try the following:

Add -fomit-frame-pointer to the compiler options as described here: tls.mbed.org/.../arm-thumb-error-r7-cannot-be-used-in-asm-here

Remove the -lto option to get rid of the lto error.

Since the device never starts advertising, are you using the 32K RAM chip (xxac)? If not try to use the xxaa linker script. Also, are you using a custom board or one of the dev. kits? If using a custom board check if you are using the right clock source (SDK code uses external crystal).

RE: DFU SD 8.1 Non-functional W/ GCC

Nguyen Hoan Hoang — Tue, 16 Jun 2015 10:55:00 GMT

You can get the Eclipse project for it from here. Precompiled hex is also available.