您好，我正在使用N32WB452这个mcu。
目前的测试板是自己绘制的电路，使用的是24M晶振和32M的BLE晶振。按照手册的DCDC的BLE电路连接。
烧录完官方的ble slave例程之后串口输出会有err，请问是什么原因？
由于官方例程的代码按照8M晶振预定义，我在keil的项目设置里面加上了HSE_VALUE=24000000，这样系统时钟和串口看起来是没有问题的，串口助手可以正常收到数据。但是蓝牙没有起来。
调了一下代码发现是ble_initdata_down()这个函数中调用的send_vendor_array和send_vendor_bypass_command会向串口报err，同时send_vendor_array中的eif_spi_recv_bytes函数返回总是E_WAIT。
以下是完整串口输出，其中receive re那行输出是我自己加的log_debug输出的：
system start...
err
receive re:-15,receive event:10,0,0,0,15.
err
err
receive re:-15,receive event:0,0,0,0,0.
err
receive re:-15,receive event:0,0,0,0,0.
err
receive re:-15,receive event:0,0,0,0,0.
err
bt init ok.
ble driver version V4.2_1127
err
receive re:-15,receive event:28,0,0,0,6.
err
err
receive re:-15,receive event:0,0,0,0,0.
err
receive re:-15,receive event:0,0,0,0,0.
err
receive re:-15,receive event:0,0,0,0,0.
err
err
receive re:-15,receive event:4,0,0,0,24.
err
err
receive re:-15,receive event:0,0,0,0,0.
err
receive re:-15,receive event:0,0,0,0,0.
err
receive re:-15,receive event:0,0,0,0,0.
err
err
猜测是晶振问题，因为我把晶振拆掉也有这些输出，但是我换了几次晶振和负载电容（8pf和15pf）都没有区别。这时候DCDC的输出是3.3V，BLE_DVDD的电容上电压是0.8V，总电源上的电流大概20mA。 |
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