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AN S-7600A/PIC16F877 JOURNEY

Part 2: Revving It Up
by Fred Eady

Start ı Tera Term Pro ı Road Test ı The Hardware ı As a Web Server ı Branching Out ı Making Changes ı ReadyıSet? ı Go ı Sources and PDF

ROAD TEST

Now that you know what the Tera Term Pro macro is supposed to do, letıs put the code to the test.

Photo 1 is the result of a good connection between Tera Term Pro and the S-7600A/PIC16F877 Internet Engine. The yesnobox command was executed and the uploadprompt message is displayed. Letıs select Yes.

Photo 1ıNote the box title. It was all done without having to write a single byte of Windows code.

The macro branches to :loadcode and immediately executes a send command that transmits an ASCII "u." At this point, the boot loader code listens for characters coming into the PICıs serial port. Tera Term Pro issues a sendfile command that transfers the seiko.hex file to the S-7600A/PIC16F877 Internet Engine. The "0" tag on the sendfile command tells Tera Term Pro to send the file as is without modification of the carriage return/line feed sequences. Photo 2 is what youıll see. Serialtest Async gives you a view of what the S-7600A/PIC16F877 Internet Engine and the Tera Term Pro components are doing in Photo 3.

Photo 2ıIf youıre wondering what the asterisks are for, theyıre just there to let me know the code is running.

When all of the data in the Intel hex file seiko.hex is transferred to the S-7600A/PIC16F877 Internet Engine, an upload complete message box is generated by Tera Term Pro. Click "OK" and Photo 4 is the result. The uploaded code is being executed and is ready to communicate with other components on the S-7600A/PIC16F877 Internet Engine. Before I move on to this phase, Iıll impart some knowledge of the hardware to you.

Photo 4ıAt this point, Tera Term Pro and the S-7600A/PIC16F877 Internet Engine boot loader have completed their tasks and turned over control to the uploaded code.

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