我想要将usbd_cdc_acm中的usbd_user_ev_handler和cdc_acm_user_ev_handler嵌入到light_switch_client当中，来代替原来light_switch_client中的button_event_handler，从而实现我通过串口助手向usb发送简单的命令如'on', 'off'字符串，然后通过此来发送generic_onoff_client_set等操作而不是通过按钮

现在我遇到的问题是，当我对串口发送任意字符时，开发板会出现如下的状况
然后卡住

case APP_USBD_CDC_ACM_USER_EVT_RX_DONE:原来我引用的也是官方例程，之前也是卡起了，然后改成这样了。
不过这样显然更不行，没有判断回车换行符，好像输入的时候一直卡在这里。因此我又改回原来的

case APP_USBD_CDC_ACM_USER_EVT_RX_DONE:
        {
            ret_code_t ret;
            static uint8_t index = 0;
            static char StrTrue[] = "begin is ok\r\r\n";
            static char StrFalse[] = "end is ok\r\r\n";
            static char cmp[] = "on\r\r\n";
            index++;

            do
            {
                if ((m_cdc_data_array[index - 1] == '\n') ||
                    (m_cdc_data_array[index - 1] == '\r') ||
                    (index >= (244)))
                {
                    if (index > 1)
                    {   
                        generic_onoff_set_params_t set_params;
                        model_transition_t transition_params;
                        uint32_t status = NRF_SUCCESS;
                        static uint8_t tid = 0;

                        nrf_gpio_pin_toggle(BSP_LED_0);
                        uint16_t length = (uint16_t)index;
                        if (length + sizeof(ENDLINE_STRING) < 244)
                        {
                            memcpy(m_cdc_data_array + length, ENDLINE_STRING, sizeof(ENDLINE_STRING));
                            length += sizeof(ENDLINE_STRING);
                        }
                        if (strcmp(m_cdc_data_array, cmp) == 0) 
                            set_params.on_off = APP_STATE_ON;
                        else
                            set_params.on_off = APP_STATE_OFF;

                        set_params.tid = tid++;
                        transition_params.delay_ms = APP_ONOFF_DELAY_MS;
                        transition_params.transition_time_ms = APP_ONOFF_TRANSITION_TIME_MS;
                        
                        //(void)access_model_reliable_cancel(m_clients[0].model_handle);
                        app_usbd_cdc_acm_write(&m_app_cdc_acm, StrTrue, sizeof(StrTrue) / sizeof(StrTrue[0]));
                        status = generic_onoff_client_set_unack(&m_clients[1], &set_params,
                                                    &transition_params, APP_UNACK_MSG_REPEAT_COUNT);
                        app_usbd_cdc_acm_write(&m_app_cdc_acm, StrFalse, sizeof(StrFalse) / sizeof(StrFalse[0]));
                    }

                    index = 0;
                }

                /*Get amount of data transferred*/
                //size_t size = app_usbd_cdc_acm_rx_size(p_cdc_acm);
                //NRF_LOG_DEBUG("RX: size: %lu char: %c", size, m_cdc_data_array[index - 1]);

                /* Fetch data until internal buffer is empty */
                ret = app_usbd_cdc_acm_read(&m_app_cdc_acm,
                                            &m_cdc_data_array[index],
                                            1);
                if (ret == NRF_SUCCESS)
                {
                    index++;
                }
            }
            while (ret == NRF_SUCCESS);

            break;
        }

但这个的问题就是在配置app key成功后再通过generic_onoff_client_set_unack()就会卡起，其他情况正常。

Wireless-Tech
抱歉，额。我通过另一种方式解决了这个问题。

case APP_USBD_CDC_ACM_USER_EVT_RX_DONE:
        {
            ret_code_t ret;
            static uint8_t index = 0;
            index++;

            do
            {
                if ((m_cdc_data_array[index - 1] == '\n') ||
                    (m_cdc_data_array[index - 1] == '\r') ||
                    (index >= (244)))
                {
                    if (index > 1)
                    {   
                        nrf_gpio_pin_toggle(BSP_LED_0);
                        uint16_t length = (uint16_t)index;
                        if (length + sizeof(ENDLINE_STRING) < 244)
                        {
                            memcpy(m_cdc_data_array + length, ENDLINE_STRING, sizeof(ENDLINE_STRING));
                            length += sizeof(ENDLINE_STRING);
                        }
                        if (strcmp(m_cdc_data_array, "on\r\r\n") == 0) SetState = true;
                        else SetState = false;
                        DataChange = true;
                    }

                    index = 0;
                }
                /* Fetch data until internal buffer is empty */
                ret = app_usbd_cdc_acm_read(&m_app_cdc_acm,
                                            &m_cdc_data_array[index],
                                            1);
                if (ret == NRF_SUCCESS)
                {
                    index++;
                }
            }
            while (ret == NRF_SUCCESS);

            break;
        }

在这里我添加了一个DataChange变量来判断一次USB CDC ACM事件。然后自定义一个定时器对此的触发事件

APP_TIMER_DEF(zqaking_timer_id);

static void zqaking_app_timer_handler(void * p_unused)
{   
    if (DataChange)
    {
        //app_usbd_cdc_acm_write(&m_app_cdc_acm, my_data_buffer, my_data_buffer_lenght);
        DataChange = false;
        uint32_t status;
        generic_onoff_set_params_t set_params;
        model_transition_t transition_params;
        static uint8_t tid = 0;

        if (SetState) set_params.on_off = APP_STATE_ON;
        else set_params.on_off = APP_STATE_OFF;
        SetState = false;

        set_params.tid = tid++;
        transition_params.delay_ms = APP_ONOFF_DELAY_MS;
        transition_params.transition_time_ms = APP_ONOFF_TRANSITION_TIME_MS;
        
        status = hx_model_client_opcode_tx_unreliable(&m_hx_model_client[0], (uint8_t *)str, (uint16_t)StrLen, APP_UNACK_MSG_REPEAT_COUNT);
        if (status == NRF_SUCCESS) app_usbd_cdc_acm_write(&m_app_cdc_acm, str, StrLen);

        status = generic_onoff_client_set_unack(&m_clients[1], &set_params,
                                                   &transition_params, APP_UNACK_MSG_REPEAT_COUNT);
    }
}

static void start(void)
{   ···
    ERROR_CHECK(app_timer_create(&zqaking_timer_id, APP_TIMER_MODE_REPEATED, zqaking_app_timer_handler));
    ERROR_CHECK(app_timer_start(zqaking_timer_id, 6000, NULL));
    ···
};

zqaking
这样就能成功发送，之前不行的原因我觉得可能是USB和mesh之间有时钟的冲突。因为我在这个过程中乱尝试的时候，添加的定时器是app_timer.c中timer2，然后也出现了相类似的情况也是卡住四个led灯全亮。后来才知道它和mesh使用的app_timer_mesh.c不能够兼容。不过我不太确定是否真的是这样

另外说明一下

ERROR_CHECK(app_timer_create(&zqaking_timer_id, APP_TIMER_MODE_REPEATED, zqaking_app_timer_handler));
ERROR_CHECK(app_timer_start(zqaking_timer_id, 6000, NULL));

我在使用app_timer_mesh本来使用了APP_TIMER_TICKS，但是好像没有成功，重新改为6000才好。不知道是不是两类定时器之间的差别

Wireless-Tech
还是感谢大佬让我看RTT内容，发现RTT中定时器才想到这个方法