on_ble_powered() callback

We have an application where the host MCU sends a 4k page of data to the DA14585 via SPI interface every ~6.3 seconds. The DA14585 then relays this data to the radio via notifications. Between pages, we go into extended sleep mode, and the master MCU wakes the DA14585 using the Wakeup Timer. The SPI data is received via DMA, and the DMA finished IRQ handler then posts a custom message to the kernel to initiate the nofications and go back to extended sleep. All this appears to be working well, except as follows:

看起来核心消息只是在DMA IRQ处理程序（实际回调）执行和消息发送时BLE核心激活。读取SW平台参考的第7.1.2节表明消息需要与BLE核心同步。我推断这是on_ble_powered（）回调的目的。我修改了代码以在DMA IRQ处理程序中设置标志，然后在on_ble_powered（）回调函数中检查标志。如果设置标志，则发送消息以启动通知/特征值更新并清除标志。

However, with this code in place, the DA14585 fails to even advertise anymore. Why would adding an on_ble_powered() callback break the code? Is there a better way to "synchronize with the BLE core" when an async event requires sending a message?

以下是相关功能：

The DMA finished callback function:
static void epilog_spi_dma_done(void *userdata, uint16_t len)
{
/ *蓝牙的准备数据* /
eeg_rt.data = rteeg_buffer;
memcpy(&eeg_rt.pageaddr, spi.parmbuf, BTSPI_PARM_LEN);

/* Reset SPI state */
spi_reset_state（）;
spi_int_bit_clear();
NVIC_ClearPendingIRQ(SPI_IRQn);
spi_enable_irq（）;

RTPageReady = true;
//epilog_spi_send_page_done_msg(&eeg_rt, rteeg_buffer + EEG_PAGE_SIZE);
}

The on_ble_powered() callback:
arch_main_loop_callback_ret_t send_page_on_ble_powered(void)
{
if (RTPageReady) {
epilog_spi_send_page_done_msg(&eeg_rt, rteeg_buffer + EEG_PAGE_SIZE);
RTPageReady = false;
}

return KEEP_POWERED;
}

The page send function:
静态孔隙epilog_spi_send_page_done_msg (struct eegdata *eeg, uint8_t *evt)
{
struct msg_page_done *msg_param;

msg_param = ke_msg_alloc（appmsg_page_received，task_app，task_app，
msg_page_done);

msg_param->eeg = eeg;
msg_param->evt = evt;

ke_msg_send(msg_param);
}

Finally, a snip from the user_catch_rest_hndl() function to handle the APPMSG_PAGE_RECEIVED msg:
case APPMSG_PAGE_RECEIVED:
{
struct msg_page_done * msg_param =（struct msg_page_done *）param;
uint8_t state = ke_state_get(TASK_APP);

if (state == APP_CONNECTED) {
eegdata_start_notify(msg_param->eeg);
eegevent_start_notify(msg_param->eeg, msg_param->evt);
}

/* Re-enable sleep mode */
app_enable_wakeup(); /* Sets up wkupct */
arch_set_extended_sleep(false);

}
break;

Thanks in advance for any advice you can offer.