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Fixed: How To Fix Debug Iar Printf.

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    If you’ve seen iar printf debugging, this tutorial might help you.

    I think I will answer you too late, which means that you may have found a strategy for solving your problem.

    I think the reason for the above problem is often that emulated processors (via printf ()) can interfere with the service of the HF protocol (here: Wireless Low Energy). As I described below, emulation requires the use of all hardware breakpoints. So when you print your lines, the debugger pauses the processor for a short time (this happens near the background, so you can’t see it in detail), reapply for each character.

    Since this does not happen very quickly, it is these pauses and delays that prevent the CPU from waiting for radio disconnects and other RF protocol handlers to maintain RF communications / connections with other devices. Bluetooth Low-Green-Energy.

    Often times, when you use a radio to connect to another device, you and your family have pretty strict real-time desires, so I don’t think using emulated I / O is compatible with using the RF protocol. … I think that manu will need to use others to debug it without using hardware breakpoints that will shutdown the processor for long periods of time (but usually if you are using manual breakpoints, you will need to restart a new application, or at least RF access if want to continue).

    You may have to go back to debugging with variables, adjust indicators or I / O pins, or toggle, which can still be much faster.

    I am creating one of my projects entirely in C on a Windows machine using the IAR Embedded Workbench IDE software. This project compiles and works great. I have several functions inside printf in my code. But the peculiarity is that the implemented project concerns the AT91SAM7X256 microcontroller. I managed to create my application to move the microcontroller to SRAM and the application loaded onto it. But the printf function just redirects to the USART port assigned to the pin.Holler (I can only guess), so I want to make sure you are using the printf redirection to display the current text on my I / O terminal. Does anyone know how I can do this?

    requested on April 30 14 continuously at 12:53


    Not The Answer You Are Looking For? Read Other Questions Tagged “Windows Embedded Printf Microcontrollers” Or Ask Your Own Question.

    I am using ARM, AVR32 MSP430 and processor versions of the IAR toolbox. In all of these cases, you need to create your own low-level functionality so that they can handle stdin and stdout streams. The ARM Compiler Manual has a section on Standard Input and Output Streams that shows you where to write the version of a request to the __write () function, as it provides a sample version indicating that data will be written to your own in-memory LED display. … …

    Knowing about IAR, I expect you to probably have a similar example of a processor / toolchain combination.

    answered Apr 30 14 at 14:42

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    I don’t understand why your printf is being redirected, but to do what you would like to do, I did the following:First open a console window. (while debugging go to menu View-> Terminal I / OThen exit the application, go to Project-> Options and learn how to enable C-SPY debugging support in Linker-> Library

    Keep in mind that this will cause the program to run much slower than it should. Comment out the quick printfs later when you’re done debugging

    answered Oct 26, 2016 at 4:06 am


    The standard answer is to decide on “semi-hosting” and “through semi-hosting” (or like SWO – but I used another) and “buffered airport output” for speed in options 1 option.

    I’m digging around here because I have a corporate presentation program from ST that doesn’t actually output to the console, and most importantly, I don’t know why – I have a lot of tutorials. Job. Therefore, if buyers can recall any details that might be omitted from the standard manual, feel free to say something …

    iar printf debug

    answered May 31 here at 11:41 pm.


    all you have to do is use #include and use your code in printf (). To do this using the Debug Console, your site must go to Project Options -> Linker -> Output (tab) and in the Format section select “Debug Info as C-SPY” there “For tested modules by emulating I / O” is saved ( it is desirable “with execution control modules”). This should allow the linker to use its special low-level I / O routines (putchar () – getchar ()) that use information technology to / from the I / O console. Debug terminals.

    If you are in debug mode, you can get this debug console window by choosing View -> Terminal I / O from the Peak menu. You will probably notice the idea that if you try to print a lot of additional text But this will delay the most important conclusion a little. But the idea of ​​having a weapon to debug your application can definitely help.

    (For the curious, you can see in the disassembler that the putchar () getchar () functions associated with the code are just dummy functions of NOP instructions when using I / O emulation. The C-SPY debugger sets a hardware breakpoint associated with this function, and whenever the breakpoint type is reached, the read / write charm register is read, the additional communication causes a small but successful delay for each character. A side effect of using I / O emulation is that the debugger reserves a product breakpoint for each of these various functions (if any) so you have fewer points. ‘Shutdown device that you can use in your own application for other debugging purposes. Applications.)

    For more information on “Emulating I / O in Modules” see the IAR User Guide: Help -> 8051 Embedded Workbench User Guide.

    answered Oct 10 at 4:10 am

    iar printf debug

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