There are fellow programmers that has developed program of Microcontroller inquire about this. It is about the next part of programming for connecting through

Serial Port. Either of Visual Basic or C, there are many people inquired about how to control with Microcontroller 8051 that is the family of Microcontroller that has been populating. Anywhere, I do the experimental board by using circuit of the basic Microcontroller in order to carry out this content. Generally, in the side of programming with Microcontroller, I will mention the part of programming to connect

Serial Port, but there will be programming to control Timer also. Why use Timer? Because we will create Baud Rate, after that we will go to programming to get and send data through Serial Port of MicrocontrollerManaging to Timer’s working TCON (Time Control Register) and TMOD (Time Mode Register) 

We take the both to do for controlling Timer’s working in order to use as looping to measure time taken of Baud Rate, is to set value in TMOD such as TMOD=00100000B.  Here, we use getting and sending data 11 bit, will have 8 data bit, Start bit, Stop bit, Custom data bit. All we will set Timer to occur interrupt that we will set at IE (Interrupt Enable Register), setting to be zero every bit, for Baud rate of getting and sending data, will use the rate of Timer Overflow together with the value of SMOD(Serial Mode Register). For the value that will set for Timer in order to create the rate of getting and sending of Serial Port in Microcontroller can use the below table.

The table of setting value for Timer in order to use for Baud Rate

 

Frequency(MHz) Baud Rate of

Serial

Port(bit/sec)		 The value of Timer that will be set
11.059 1200 E8H
11.059 2400 F4H
11.059 4800 FAH
11.059 9600 FDH

     Programming for setting value of working of Timer Read the rest of this entry »

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