Keil MDK3.20 debug stm32 method under ULINK

    1. Programs run in RAM

    Key points: (1) Change the download address of the program to the RAM space

    (2) Before debugging the program, set the SP and PC pointers to the Ram space.

    Create a new project and select the specific model of STM32. I bought Wanli development board and selected stm32f103Vb.

    Set the program download address, as shown in the figure below, the address of IROM1 points to the RAM space of STM32.

    How to allocate the space depends on your needs. The internal RAM size of this processor is 20K, 16K is allocated to the read-only area, and 4K is allocated to the readable and writable area. In this way, the size of IROM is set to 0x4000, the start of IRAM1 becomes 0X20004000, and the size is only 0X1000.

    Select ULINK1 Cortex Debugger in the Debug tab (the software uses the yjgyiysb CC crack method). Unselect Load Application at Start and add the startup script RAM.ini in Initialization.

    The specific contents of RAM.ini are as follows:

    FUNC void Setup (void) {

    SP = _RDWORD(0x20000000); // Setup Stack Pointer

    PC = _RDWORD(0x20000004); // Setup Program Counter

    _WDWORD(0xE000ED08, 0x20000000); // Setup Vector Table Offset Register

    }

    LOAD XXX.axf INCREMENTAL // Download, red represents the project file name.axf

    Setup(); // Setup for Running

    g, main

    Uncheck Update Target before Debugging under Utilities

    After adding this, you can debug in RAM.

    >>>>>>We need to set the correct interrupt vector table location in the code. The interrupt vector table is usually placed at the beginning of the user program, so when running in flash, the vector table is located at 0x08000000, and when the code is placed in SRAM, its location becomes 0x20000000. When initializing NVIC, we can place the following code to define the location of the vector table

    NVIC_SetVectorTable(0x20000000, 0x0);

    or

    NVIC_SetVectorTable(0x08000000, 0x0);

    or

    ?

    >>>>>In the Debug item in the project options, in the Download tab, remove all hooks and do not download the code to flash. In this way, you can debug the program in RAM!

    2. Debugging in Flash

    After creating a new project, the system sets IROM1 as the address and size of FLASH by default. Only two steps are required:

    1) Set the debugging tool to ULINK1 CORTEX DEBUGGER, as shown in the figure below. There is no need to set the start script.

    2) Select ULINK1 cortex debugger in the Utility and set the programming algorithm, as shown below.

    After that, you can debug the FLASH.

    Hardware: Wanli's EK-STM32F development board, remove the RS3 and RS4 resistors, and disconnect the emulator of the development board itself.

    Software: KEIL MDK3.20+ULINK driver replacement file.

    Emulator: ULINK