ATSAMR34自定义板LoRa P2P无法工作，请求技术协助

我是LoRa技术新手，基于ATSAMR34官方原理图制作了自定义板，已成功刷入基础镜像并实现串口通信。但刷入LoRa P2P镜像编译刷入后，LoRa无法正常激活。

两块微控制器板连接至同一笔记本的COM6、COM8两个USB串口，串口输出信息如下：

COM6输出 #

Starting Node 1 of Simple Demo for LoRa P2P Stack ...
Full Function Device (FFD) operations
   RF Transceiver: SX_1276
   Demo Instruction:
           Power on the board until LED 1 lights up
           to indicate connecting with peer.
           Push Button 1 to broadcast message.
           LED 1 will be toggled upon receiving messages.

Periodic Transmission = Disable
Duty Cycling support = Disable

Before Initialize_Demo

-----------------------------------------------------
RF Parameters
 - Tx output power: 1
 - PA boost: 0
 - Spreading factor: SF7
 - Bandwidth (125kHz=7, 250kHz=8, 500kHz=9): 7
-----------------------------------------------------

Connecting Peer on Channel 1

Scan Channel 0
Scan Channel 1
 Scan Operation Status: 0 device found
Connect Operation Status: 0

Started Wireless Communication on Channel 1


My Address: 0xd8aa2b0f8e68fab5 PANID: 0x4321 Channel: 1

Connection   PeerLongAddress   PeerInfo   RxOnStatus

Before Stack_Init

Starting the processing

COM8输出 #

Starting Node 1 of Simple Demo for LoRa P2P Stack ...
Full Function Device (FFD) operations
   RF Transceiver: SX_1276
   Demo Instruction:
           Power on the board until LED 1 lights up
           to indicate connecting with peer.
           Push Button 1 to broadcast message.
           LED 1 will be toggled upon receiving messages.

Periodic Transmission = Disable
Duty Cycling support = Disable

Before Initialize_Demo

-----------------------------------------------------
RF Parameters
 - Tx output power: 1
 - PA boost: 0
 - Spreading factor: SF7
 - Bandwidth (125kHz=7, 250kHz=8, 500kHz=9): 7
-----------------------------------------------------

Connecting Peer on Channel 1

Scan Channel 0
Scan Channel 1
 Scan Operation Status: 0 device found

Connect Operation Status: 0

Started Wireless Communication on Channel 1

My Address: 0xf0fbc24ed8d024db PANID: 0x4321 Channel: 1
Connection   PeerLongAddress   PeerInfo   RxOnStatus

Before Stack_Init

Starting the processing

排查建议 #

• 硬件层面
  • 核对SX1276射频电路与官方原理图的一致性：重点检查匹配网络元件值、天线阻抗匹配（必须50Ω）、电源滤波电路，确认SX1276的PA引脚供电稳定，无压降。
  • 检查SX1276的复位引脚、SPI通信引脚（SCK/MOSI/MISO/NSS）焊接质量，排除虚焊、短路；可通过读取SX1276寄存器验证SPI通信是否正常。
  • 替换官方开发板的天线到自定义板上测试，排除天线本身故障。
• 软件配置
  • 确认编译镜像时的节点角色配置：当前两块板均为Node 1（FFD），尝试修改其中一块为协调器角色，或调整节点ID避免冲突。
  • 检查代码中SX1276初始化流程，添加寄存器读取调试信息，确认芯片被正确识别。
  • 尝试开启PA boost（将配置中PA boost设为1）并提高发射功率，增强信号强度后重新扫描。
• 调试手段
  • 用逻辑分析仪监测SPI通信波形，验证初始化过程中寄存器写入是否正确。
  • 用频谱分析仪检测射频信号输出，确认信号存在且频率与通道配置匹配。

内容的提问来源于stack exchange，提问作者Balaji S