BT_driver Debug Logging crashes system

[nobody19]

Hi everybody,

First I thought, I have to report a Bug but then I read in the Bug description that you should only report a Bug when you are sure that it is not just a user error. So that's the reason I ask this question here.

I have the problem when I'm enabling the log level debug for the BT_HCI_Driver that the whole system is crashing. When only the INFO level for the BT_HCI_Driver is enabled, the sample "peripheral" project is running. I disabled the UART log and switched it to SEGGER_Interface. Is it really a bug or just miss use of Zephyr.

I' tried it on the STM32U5A9-DK with LWB5+ connected over uart.

Thanks in advance for any help/opinion.

RTT LOG:

*** Booting Zephyr OS build zephyr-v3.5.0-3043-g2dab5dd0a0d2 ***
[00:00:00.004,000] <inf> fs_nvs: 8 Sectors of 8192 bytes
[00:00:00.004,000] <inf> fs_nvs: alloc wra: 0, 1fd0
[00:00:00.004,000] <inf> fs_nvs: data wra: 0, 0
[00:00:00.005,000] <dbg> bt_driver: h4_open: 
[00:00:00.005,000] <dbg> bt_driver: rx_thread: started
[00:00:00.005,000] <dbg> bt_driver: rx_thread: rx.buf 0
[00:00:00.005,000] <wrn> cyw43xxx_driver: Enable bt_reg_on_gpios pin
[00:00:00.505,000] <dbg> bt_driver: h4_send: buf 0x20004d04 type 0 len 3
[00:00:00.507,000] <dbg> bt_driver: process_rx: remaining 0 discard 0 have_hdr 0 rx.buf 0 len 0
[00:00:00.507,000] <dbg> bt_driver: process_rx: remaining 2 discard 0 have_hdr 0 rx.buf 0 len 0
[00:00:00.507,000] <dbg> bt_driver: process_rx: remaining 1 discard 0 have_hdr 0 rx.buf 0 len 0
[00:00:00.507,000] <dbg> bt_driver: get_evt_hdr: Got event header. Payload 4 bytes
[00:00:00.507,0025
ASSERTION FAIL [err == 0] @ WEST_TOPDIR/zephyr/subsys/bluetooth/host/hci_core.c:331
  command opcode 0xfc2e timeout with err -11
[00:00:10.509,000] <err> os: r0/a1:  0x00000003  r1/a2:  0x00000000  r2/a3:  0x00000002
[00:00:10.509,000] <err> os: r3/a4:  0x20000870 r12/ip:  0x0000290d r14/lr:  0x08004ceb
[00:00:10.509,000] <err> os:  xpsr:  0x41000000
[00:00:10.509,000] <err> os: Faulting instruction address (r15/pc): 0x08004cf6
[00:00:10.509,000] <err> os: >>> ZEPHYR FATAL ERROR 3: Kernel oops on CPU 0
[00:00:10.509,000] <err> os: Current thread: 0x200013c8 (unknown)
[00:00:10.730,000] <err> os: Halting system

proj.conf:

CONFIG_UART_CONSOLE=n

CONFIG_RTT_CONSOLE=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_BT_HCI_DRIVER_LOG_LEVEL_DBG=y
CONFIG_SEGGER_RTT_MODE_NO_BLOCK_SKIP=y

defconfig:

#BT Module selection
CONFIG_BT_H4=y
CONFIG_BT_AIROC=y
CONFIG_CYW4373=y
CONFIG_CYW4373_STERLING_LWB5PLUS=y

.dts (snippets)

chosen {
  zephyr,console = &usart1;
  zephyr,shell-uart = &usart1;
  zephyr,bt-uart = &lpuart1;
  zephyr,sram = &sram0;
  zephyr,flash = &flash0;
  zephyr,code-partition = &slot0_partition;
};

&lpuart1 {
    status = "okay";
    current-speed = <115200>;

    /* HCI-UART pins*/
    pinctrl-0 = <&lpuart1_tx_pg7 &lpuart1_rx_pg8 &lpuart1_rts_pg6 &lpuart1_cts_pg5>;
    pinctrl-names = "default";

    STERLING-LWB5plus {
      status = "okay";
      compatible = "infineon,cyw43xxx-bt-hci";
      bt-reg-on-gpios = <&gpioa 5 (GPIO_ACTIVE_HIGH)>;
      fw-download-speed = <3000000>;
    };
	hw-flow-control;
};