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OMAPL138 SBL

依照 http://software-dl.ti.com/processor-sdk-rtos/esd/docs/latest/rtos/Foundational_Components.html#omapl137-omapl138-c6748 

尝试lcdkOMAPL138的SBL,按照步骤串口当中应该出现下图

但是我的串口助手当中只显示红框中的部分,说明MLO没有写入!

请问这是什么问题?是SD卡格式化有问题还是其他问题