No option to disable a monitor reset after download

[vasanthmurari]

Type: Bug

I would like to use JTAG to write the application directly to SRAM rather than the external flash. When writing binary to SRAM, the MCU will loose the binary written via JTAG if a reset is invoked. And launch.json file doesn't have option to perform monitor RESET only when needed, and in my case, I want it before download only. Please see the highlighted section in bold.

In the excerpts below, there is a monitor reset before and after downloading the application binary and I want to avoid the reset which happens after downloading the file.

Without this option, I can't use VS Code for development purpose.

Below is the excerpts:

Connecting to J-Link... J-Link is connected. Firmware: J-Link V11 compiled Aug 2 2023 10:34:01 Hardware: V11.00 S/N: 851001477 Feature(s): RDI, FlashBP, FlashDL, JFlash, GDB Checking target voltage... Target voltage: 3.32 V Listening on TCP/IP port 50000 Connecting to target... Halting core... Connected to target Waiting for GDB connection...Connected to 0000:0000:0000:0000:0000:0000:0000:0001 GDB client (conn. 824) requested target.xml from GDB Server Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000 Read register 'r1' (4 bytes) from hardware: 0xC4AA0624 Read register 'r2' (4 bytes) from hardware: 0x00000000 Read register 'r3' (4 bytes) from hardware: 0x00000000 Read register 'r4' (4 bytes) from hardware: 0xC9120008 Read register 'r5' (4 bytes) from hardware: 0x00000000 Read register 'r6' (4 bytes) from hardware: 0x55555555 Read register 'r7' (4 bytes) from hardware: 0xC8B40624 Read register 'r8' (4 bytes) from hardware: 0x55555555 Read register 'r9' (4 bytes) from hardware: 0x55555555 Read register 'r10' (4 bytes) from hardware: 0x55555555 Read register 'r11' (4 bytes) from hardware: 0x55555555 Read register 'r12' (4 bytes) from hardware: 0x000000E1 Read register 'sp' (4 bytes) from hardware: 0xC8B40624 Read register 'lr' (4 bytes) from hardware: 0x13040008 Read register 'pc' (4 bytes) from hardware: 0xD0120008 Read register 'xpsr' (4 bytes) from hardware: 0x00000041 Read 4 bytes @ address 0x080012D0 (Data = 0xE7FDBF00) Read 2 bytes @ address 0x080012D0 (Data = 0xBF00) Received monitor command: halt Halting target CPU... ...Target halted (PC = 0x080012D0) Received monitor command: reset Resetting target Downloading 672 bytes @ address 0x24000000 Downloading 15856 bytes @ address 0x240002A0 Downloading 15744 bytes @ address 0x24004090 Downloading 15728 bytes @ address 0x24007E10 Downloading 15648 bytes @ address 0x2400BB80 Downloading 15888 bytes @ address 0x2400F8A0 Downloading 15856 bytes @ address 0x240136B0 Downloading 15808 bytes @ address 0x240174A0 Downloading 16160 bytes @ address 0x2401B260 Downloading 15872 bytes @ address 0x2401F180 Downloading 15632 bytes @ address 0x24022F80 Downloading 16048 bytes @ address 0x24026C90 Downloading 15888 bytes @ address 0x2402AB40 Downloading 16048 bytes @ address 0x2402E950 Downloading 15968 bytes @ address 0x24032800 Downloading 15952 bytes @ address 0x24036660 Downloading 15568 bytes @ address 0x2403A4B0 Downloading 15872 bytes @ address 0x2403E180 Downloading 16000 bytes @ address 0x24041F80 Downloading 15920 bytes @ address 0x24045E00 Downloading 15968 bytes @ address 0x24049C30 Downloading 11940 bytes @ address 0x2404DA90 Downloading 36 bytes @ address 0x24050934 Downloading 16344 bytes @ address 0x24050958 Downloading 16288 bytes @ address 0x24054930 Downloading 16176 bytes @ address 0x240588D0 Downloading 15544 bytes @ address 0x2405C800 Downloading 8 bytes @ address 0x240604B8 Downloading 5188 bytes @ address 0x240604C0 Downloading 13096 bytes @ address 0x24061904 Writing register 'pc' = 0x240003E4

Received monitor command: reset Resetting target

Read 4 bytes @ address 0x240003E4 (Data = 0xF000E75C) Read 2 bytes @ address 0x240003E4 (Data = 0xE75C) Read 4 bytes @ address 0x240003E4 (Data = 0xF000E75C) Read 2 bytes @ address 0x240003E4 (Data = 0xE75C) Starting target CPU... Debugger requested to halt target... ...Target halted (PC = 0x24018318) Reading common registers: Read register 'r0' (4 bytes) from hardware: 0x00000000

VS Code version: Code 1.84.2 (https://github.com/microsoft/vscode/commit/1a5daa3a0231a0fbba4f14db7ec463cf99d7768e, 2023-11-09T10:51:52.184Z) OS version: Windows_NT x64 10.0.19045

[haneefdm]

Please read the documentation. There are dozens of ways to customize/override what we do by default.

[vasanthmurari]

Hi @haneefdm , thanks, I ran through the documentation and fixed it.

All I had to do was to create overrideLaunchCommands and update as required. Nice documentation by the way.

        "overrideLaunchCommands": ["monitor reset halt", "load", "c"]

The only difference in lauch.json between bootloader and main application is the overrideLaunchCommands and breakpoints for some reasons works on bootloader application but doesn't work on main application. Can you please confirm if my observation is true?

[haneefdm]

At this point you are basically talking to gdb directly. breakpoints can only work if your elf file has all the appropriate symbols and debug info. This is why the elf file(s) is important. You can also load multiple elf files using symbolFiles