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DAC7554 是 Serial SPI 接口的 DAC 芯片。已经调试很长时间都不行。我想是调试方法没有掌握好吧,应该借助工具先验证时序。再逐步验证数据和芯片端的响应。 当然先要确认芯片供电, 复位等条件正常。至于 ARMcortex—M4 还是其它核, 关系不大。