ESP32-C6 Sometimes startup fail (IDFGH-14736)

[llisnikowski]

Answers checklist.

• [x] I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• [x] I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• [x] I have searched the issue tracker for a similar issue and not found a similar issue.

IDF version.

v5.4

Espressif SoC revision.

ESP32-C6

Operating System used.

Linux

How did you build your project?

Command line with idf.py

If you are using Windows, please specify command line type.

None

Development Kit.

Custom board

Power Supply used.

External 3.3V

What is the expected behavior?

Always startup.

What is the actual behavior?

The program sametimes locks up before the void app_main(void) function.

The program stop at: LPPERI.clk_en.rng_ck_en = en; step in esp/idf/components/hal/esp32c6/include/hal/lp_clkrst_ll.h:24 in _lp_clkrst_ll_enable_rng_clock fuction:

__attribute__((always_inline))
static inline void _lp_clkrst_ll_enable_rng_clock(bool en)
{
    LPPERI.clk_en.rng_ck_en = en;
}

Backtrace:

• IDF/components/esp_system/port/cpu_start.c:714
• IDF/components/esp_system/port/soc/esp32c6/clk.c:319
• IDF/components/hal/esp32c6/include/hal/lp_clkrst_ll.h:24

Steps to reproduce.

1. Build empty program
2. Flash
3. Reopen monitor a few times until the program locks up

Debug Logs.

--- esp-idf-monitor 1.5.0 on /dev/ttyACM0 115200
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H
ESP-ROM:esp32c6-20220919
Build:Sep 19 2022
rst:0x1 (POWERON),boot:0x7c (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:2
Valid secure boot key blocks: 0 1 2
RSA-PSS secure boot verification succeeded
load:0x40875890,len:0x2678
load:0x4086c110,len:0xc30
load:0x4086e610,len:0x5014
entry 0x4086c110
I (118) cpu_start: Unicore app
D (118) cpu_start: Pro cpu up
D (126) clk: RTC_SLOW_CLK calibration value: 3824141
I (131) My log: /IDF/components/esp_system/port/cpu_start.c:714
I (132) My log: /IDF/components/esp_system/port/soc/esp32c6/clk.c:319
I (133) My log: /IDF/components/hal/esp32c6/include/hal/lp_clkrst_ll.h:24

More Information.

On v5.1.3 normal startup

[ginkgm]

Hi @llisnikowski ,

I doubt whether it's related to your customized board or secure boot.

Have you tested if this issue happens without secure boot or on an official devkit?

[Alvin1Zhang]

@llisnikowski Thanks for reporting, would you please help share if any updates for the issue? Thanks.

[Alvin1Zhang]

@llisnikowski Thanks for reporting, would you please help share if any updates for the issue? Thanks.

[ginkgm]

Issue closed. Feel free to reopen if you have further clues.