Retargeting

RE: Retargeting

Nkrause — Tue, 10 Feb 2015 20:56:27 GMT

Many thanks! That got it compiling correctly.

RE: Retargeting

RK — Tue, 10 Feb 2015 01:28:33 GMT

For anyone else using Crossworks, here are their instructions for input/output, and as I said you can also use the segger RTT library ..

Crossworks putchar instructions

RE: Retargeting

Hung Bui — Mon, 09 Feb 2015 13:15:45 GMT

Hi Nkrause,

the retarget.c library is simply overwriting the stdio library such as fputc, fgetc with UART command. I'm not sure how to do it with Crosswork, but you can't, you can simply remove retarge.c and replace those commands to print log with direct UART command to send and receive data.

RE: Retargeting

Marcel Mulder — Mon, 09 Feb 2015 08:07:40 GMT

If you want to be able to use app_trace or want to be able to printf to the UART you need retarget.c.

I think it has something to do with the c library you are using but I don't know anything about Crossworks. I use the arm toolchain from launchpad. This includes a newlib nano implementation that works fine.

RE: Retargeting

RK — Sun, 08 Feb 2015 06:18:11 GMT

Remove retarget.c, you don't need it.

Edit:

If you want to send output to the UART then there's an example in the Crossworks manual of how to do that, you customise __putchar() you don't need, nor can you use, retarget.c which has definitions for GCC or ARM libraries only. The manual also shows you how to output to the Crossworks console (very useful). It doesn't tell you how to use the Segger "RTT" library, but Crossworks works natively with that as well giving you a very easy way to output data right out of the JLink. You just follow the instructions you can find online at Segger for RTT and that too appears in the console.