declare external assembly language function (in a *.s file) The compiler will assemble and link *.s files in the project's directory when you hit compile This file must be created or imported as a file into the project’s directory. Inline assembly code using _asm inside a C/C++ source file is not currently supported in the mbed compiler, so the ARM assembly language source code must be placed in a separate *.s file. In the code below, LED1 blinks using the assembly language function to write the new value to the bit, and LED4 blinks using the C/C++ API DigitalOut available in the mbed compiler. Then the assembly code can be called just like a C/++ function using the C/C++ statement my_asm(value). First in C/C++, the assembly language function, my_asm, must be declared external at the beginning of the C/C++ module. At the same time, the C/C++ API DigitalOut is used to blink a different LED to show the easier alternative in C/C++. Here is a simple example showing an ARM assembly language routine called from C/C++ that blinks an LED. Debugging an mbed project using hardware breakpoints via USB on Keil Tools MDKĬalling an Assembly Language Function from C/C++ ¶.Debugging an mbed project using the Keil Tools ARM Emulator.Calling an Assembly Language Function from C/C++.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |