20 serial v2 发送时出现崩溃,怎样办?

发布于 2024-08-25 17:26:03 浏览：312 订阅该版

* 硬件
	* stm32l431RCT6
	* uart2 外接蓝牙模块
	* uart3 msh
	* 使用 serial v2, 开启 RX DMA
* 表现: 在发送数据到蓝牙模块时,有一定机会出现崩溃(一般在开机200多秒后):

```

[294028] D/bt: 进入透传模式.
thread   pri  status      sp     stack size max used left tick   error  tcb addr
-------- ---  ------- ---------- ----------  ------  ---------- ------- ----------
bt_cmd    14  suspend 0x000000f4 0x00000400    52%   0x00000001 EINTRPT 0x20002200
bt        12  running 0x000000fc 0x00000400    49%   0x00000003 OK      0x20002168
at_clnt    9  suspend 0x0000010c 0x00000600    35%   0x00000005 EINTRPT 0x20005f90
tshell    20  suspend 0x000000cc 0x00001000    06%   0x00000009 EINTRPT 0x20004d00
power      1  suspend 0x000000e4 0x00001000    11%   0x00000001 EINTRPT 0x20003890
p2000      6  suspend 0x0000013c 0x00000400    65%   0x00000005 EINTRPT 0x200027a0
tidle0    31  ready   0x0000008c 0x00000180    71%   0x00000007 OK      0x20003b9c
[294032] E/cmb:
[294032] E/cmb: 固件名称：rt-thread，硬件版本号：1.0，软件版本号：1.0
[294032] E/cmb: 在中断或裸机环境下发生错误异常
[294032] E/cmb: stack_pointer: 0x20000db4, stack_start_addr: 0x20000984, stack_end_addr: 0x20000d84
[294032] E/cmb: 错误：主栈(20000db4)发生溢出
[294032] E/cmb: =========== 线程堆栈信息 ===========
[294032] E/cmb: ====================================
[294032] E/cmb: ========================= 寄存器信息 =========================
[294032] E/cmb:   R0 : 20001bc4  R1 : 20001be8  R2 : 20001c08  R3 : 080002e9
[294032] E/cmb:   R12: fffffffd  LR : 20000d84  PC : 10000000  PSR: f0000000
[294032] E/cmb: ==============================================================
[294032] E/cmb: 发生总线错误，原因：精确的数据总线错误
[294032] E/cmb: 发生总线错误的地址：0004844f
[294032] E/cmb: 查看更多函数调用栈信息，请运行：addr2line -e rt-thread.elf -afpiC 0800fd84 0800fd84 08010008 08001ad2 08013148 080023ec 080024cc 0801811c 08013148 0800258a 0800c6a4 080002e8 08017da2 08003c02
[294032] E/cmb: Current system tick: 294032

===================
(.venv) D:\Develop\p2000-bt> addr2line -e rt-thread.elf -afpiC 0800fd84 0800fd84 08010008 08001ad2 08013148 080023ec 080024cc 0801811c 08013148 0800258a 0800c6a4 080002e8 08017da2 08003c02
0x0800fd84: _serial_poll_tx at D:\Develop\p2000-bt/rt-thread\components\drivers\serial/serial_v2.c:382
0x0800fd84: _serial_poll_tx at D:\Develop\p2000-bt/rt-thread\components\drivers\serial/serial_v2.c:382
0x08010008: _serial_fifo_tx_blocking_buf at D:\Develop\p2000-bt/rt-thread\components\drivers\serial/serial_v2.c:531
0x08001ad2: print_call_stack at D:\Develop\p2000-bt/packages\CmBacktrace-latest/cm_backtrace.c:405
0x08013148: rt_spin_unlock_irqrestore at D:\Develop\p2000-bt/rt-thread\src/cpu_up.c:85
0x080023ec: cm_backtrace_fault at D:\Develop\p2000-bt/packages\CmBacktrace-latest/cm_backtrace.c:707
0x080024cc: rt_cm_backtrace_exception_hook at D:\Develop\p2000-bt/packages\CmBacktrace-latest/cmb_port.c:234
0x0801811c: rt_exit_critical_safe at D:\Develop\p2000-bt/rt-thread\src/scheduler_up.c:492
0x08013148: rt_spin_unlock_irqrestore at D:\Develop\p2000-bt/rt-thread\src/cpu_up.c:85
0x0800258a: exception_hook at D:\Develop\p2000-bt/packages\CmBacktrace-latest/cmb_port.c:264
0x0800c6a4: rt_hw_hard_fault_exception at D:\Develop\p2000-bt/rt-thread\libcpu\arm\cortex-m4/cpuport.c:384
0x080002e8: _update_done at D:\Develop\p2000-bt/rt-thread\libcpu\arm\cortex-m4/context_gcc.S:250
0x08017da2: rt_system_scheduler_start at D:\Develop\p2000-bt/rt-thread\src/scheduler_up.c:187
0x08003c02: LoopForever at D:\Develop\p2000-bt/packages\stm32l4_cmsis_driver-latest\Source\Templates\gcc/startup_stm32l431xx.s:104

```

* 代码
 * uart2 通过 AT Client 启用

```c
    // init at client
    at_client_init(BT_UART_NAME, 128, 128);
    at_client = at_client_get_first();
    if (at_client)
    {
        /* step2：修改串口配置参数 */
        const struct serial_configure config = {
            .baud_rate = BAUD_RATE_9600,               // 修改波特率为 9600
            .data_bits = DATA_BITS_8,                  // 数据位 8
            .stop_bits = STOP_BITS_1,                  // 停止位 1
            .parity = PARITY_NONE,                     // 无奇偶校验位
            .bit_order = BIT_ORDER_LSB,                // 小端模式
            .flowcontrol = RT_SERIAL_FLOWCONTROL_NONE, // 无流控
            .invert = NRZ_NORMAL,                      // NRZ 正常模式
#if defined(RT_USING_SERIAL_V1)
            .bufsz = RT_SERIAL_RB_BUFSZ,
#elif defined(RT_USING_SERIAL_V2)
            .rx_bufsz = BSP_UART2_RX_BUFSIZE, // 修改缓冲区 rx buff size 为 128
            .tx_bufsz = BSP_UART2_TX_BUFSIZE, // 修改缓冲区 tx buff size 为 128
#endif // RT_USING_SERIAL_Vx
        };
        /* step3：控制串口设备。通过控制接口传入命令控制字，与控制参数 */
        rt_device_control(at_client->device, RT_DEVICE_CTRL_CONFIG, (void *)&config);
```

* 发送的代码

```c
size_t bt_send(const char *data, size_t len)
{
    if (at_client == NULL)
    {
        LOG_E("at_client is NULL. L%d", __LINE__);
        return 0;
    }
    return at_client_obj_send(at_client, data, len);
}

...

LOG5("进入透传模式.");

/* 发送字符串 */
bt_send(str, rt_strlen(str));

...
```

现在没有方向了,请各位帮忙帮忙