STM32 RVMDK JLINK flash and RAM debugging method

Debugging method under flash:

1. Open the project to be debugged, right-click options for target on the left column. Enter debug and select jlink.

2. Select jlink in utility.

3. Use JLINK to connect the PC and the development board, and turn on the power of the development board. Enter the settings next to it and add the flash burning method.

4. Go back and rebuild, press ctrl+F5 to enter debugging, you can single-step and breakpoint. According to ST's reference manual 2.3.3 embedded flash, the address of flash starts from 0x0800 0000. In the debugging window, you can see that the address of the assembly starts with 0x0800, which means that the code segment is burned into the flash.

Debugging method under SRAM:

1. Copy the ram.ini file D:\Keil\ARM\Boards\Keil\MCBSTM32\STLIB_Blinky in the Keil installation directory to the project directory to be debugged, and change the file to be loaded to the location and name of the AXF file of the project to be debugged. Here, the project is GPIO.

2. According to reference manual 2.3.1, the starting address of SRAM is 0x2000 0000. To put the code segment into SRAM, you must set the program read-only segment to start from the beginning of SRAM, and after a certain length (here set to 0X4000), the data segment RAM starts. Note that the length at both ends cannot exceed the total size of SRAM.

3. Follow the same steps 1 and 2 as in flash debugging, but select jlink.

4. Add ram.ini under debug page.

5. Choose not to erase the flash and modify the location and size of the code and data segments.

6. OK all the way, rebuild, ctrl+F5 to enter debugging. You can single-step, step in and breakpoint. Look at the location of the assembly code, it starts with 0x2000, indicating that the program is running in SRAM.

In addition, check the .sct file in the project directory as follows.

LR_IROM1 0x20000000 0x00004000  {    ; load region size_region
  ER_IROM1 0x20000000 0x00004000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }
  RW_IRAM1 0x20004000 0x00004000  {  ; RW data
   .ANY (+RW +ZI)
  }
}

This indicates that the program has indeed been configured into the SRAM space.