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利用外部信号触发4500投射，j检测到外部信号没有问题，目前是DLP没有处理外部输入的触发信号，请问这个怎么解决？
请参考DLP4500EVM user guide配置一下触发的相关参数：https://www.ti.com/lit/ug/dlpu011f/dlpu011f.pdf?ts=1630467126385&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FDLPLCR4500EVM
