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HI everyone: I have receive a new project with EPSON 812A Character wheel printer,but I don't know how to control it with C51,and also I can not understand its working way.Can you help me?
You need to read the printer documentation - that will tell you what you need to do to drive this printer. Or, do you have it working connected to a PC? In that case, you could observe the signal lines & deduce what to do! Once you know what you have to do, you can then start thinking about how to implement that using C51.