With nano-specs I can't get printf statements like this to work where it needs to take in values from a variable.

printf ("Data1 %d\n", data1);

A simpler printf with just characters work ok.

printf ("abc\n");

Per the standard CMSDK…

I am trying to write a bootloader that fits within a 4Kbyte space and I'm trying to keep the essential code as small as possible.

However, with the standard default setup from the CMSDK Cortex M0 enviroment, even with a empty main(), I notice that…

Hello,

Looking for some pointers on the scenario below. I'm fairly new to firmware and bare-metal programming.

In the system I'm working on, I am looking to get a bootloader and 2 application programs compiled. The 2 application programs will be placed…

I've noticed that arm gcc, when compiling code for Cortex-M0 (at least) seems to generate instructions:

   adds r0, r2, #0

Where I'm pretty sure that it the same as:

   movs r0, r2

In fact, I can disassemble a relatively substantial program and not…

Hi, I am trying to find out where exactly the soft floating point code used in eabi for a M0+ comes from. When i compile a program using floating point using gcc_eabi, it generates code to carry out this operation. ( code included).

I downloaded the…

  I've the following implementation for a svc exception handler on a cortex-m0:

    int  __attribute__((naked))  
    sv_call_handler(uint32_t n, uint32_t arg1, uint32_t arg2, uint32_t arg3,  
                    uint32_t arg4, uint32_t arg5)
     {
          irq_off();


When I built it for cortex…

Unlike the Design kit makefiles, in which tool-chain (Keil, DS5 or GCC) can be chosen, the Prototyping kit makefiles uses only DS5.

Is it possible to receive Prototyping kit makefiles that support tool-chain selection and in particular GCC?

Hi,

I am just performing the first steps with the DesignStart Eval Edition (Cortex-M0), trying to compile the verilog sources to get a simulation running.

So I changed /systems/fpga_testbench/trl_sim/makefile to use gcc and modelsim and now I want to …

Hi,

I am using the MPS2+ board to debug my DesignStart Cortex-M0. The core is up and running and now I want to program the onboard SRAM. On the SDCard I can see that \MB\HBIO263C\AN387\images.txt expects an axf file.

Is it possible to generate an .axf…

Hi,

I am working on a GPIO IP for Designstart Pro Cortex-M0. Now in my Simulation there are some Read-Modify-Write cycles in order to set only single bits in a 32 bit register.

If the GPIO register is 0x0000000X and I just want to set bit 16, GCC produces…