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Using 52 to control AD9850 to output sine wave
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After power on and reset, the LCD display, interrupt and AD9850 are initialized; the single-chip microcomputer processes the independent keyboard to judge whether the confirmation key is pressed, if it is, the next step will be processed, if not, it will continue to wait; when the confirmation key is pressed, the input value will be judged to judge whether the input value conforms to the frequency output range; the input data will be processed to change the frequency The value is sent to 1602 to display the value, which is converted into frequency control word, and the frequency control word is written to AD9850 to change the output frequency value and output the accurate sine signal
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