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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?
Sure, make sure that power is applied and then connect the 8051 to the parallel port, assuming it has one. Now, write all the software that controls the printer as per the Epson interface protocol data sheet. Good luck! :-)
Dear Mark Odell : Thanks for you help,but can you tell me how to convert the string such as '12345' to print pulse? Best Regard! bihu
What is a print pulse? How is the related to the C166? More specifically, how is this related to the Keil C166 compiler (the topic of this forum, well one of them at least)? Your answer most definitely lies with the Espon documentation, not the Keil documentation.
I am sorry,the correct topic of this forum is C51 compiler. if I want to print a string,whether or not I should send the print signal(pulse) one by one?
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.