Programming PIC Microcontrollers with PICBASIC (Embedded by Chuck Hellebuyck

By Chuck Hellebuyck

This complete instructional assumes no earlier event with PICBASIC. It opens with an advent to such uncomplicated options as variables, statements, operators, and constructions. this is often by means of dialogue of the 2 most typically used PICBASIC compilers. the writer then discusses programming the most typical model of the PIC microcontroller, the 15F84. the rest of the ebook examines numerous real-world examples of programming photographs with PICBASIC. according to the built-in nature of embedded know-how, either and software program are mentioned in those examples; circuit information are given in order that readers may possibly reflect the designs for themselves or use them because the beginning issues for his or her improvement efforts.

  • Offers a whole advent to programming the world's most typically used microcontroller, the Microchip PIC, with the strong yet effortless to exploit PICBASIC language
  • Gives a variety of layout examples and initiatives to demonstrate vital concepts

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LET: Assign result of an expression to a variable. LOOKDOWN: Search table for value. LOOKUP: Fetch value from table. LOW: Make pin output low. NAP: Power down processor for short period of time. OUTPUT: Make pin an output. P~USE: Delay (lmillisecond, or msec, resolution). PEEK: Read byte from register. POKE" Write byte to register. POT: Read potentiometer on specified pin. PULSIN: Measure pulse width (10us resolution). PULSOUT: Generate pulse (10us resolution). PWM: Output pulse width modulated pulse train to pin.

If you want to jump when the switch is open, then set action to 0. label This sets the g 9 label if the action operator is met. This label must be defined somewhere in the program to properly compile. 26 PicBasic Compiler(PBC) Example: B0 - 0 BUTTON 2, 0, i00, i0, B0, 0, SKIP ' Check for button ' I/O port)at ' and held port press pin (0 at 2 and ' goto SKIP routine if n o t ' pressed. A l s o if i t ' s p r e s s e d for ' auto-repeat i00 at loops, a rate of i0 What makes this command so confusing is all the options.

These PEEK and POKE commands really allow direct access to the PIC's internal registers similar to assembly language programming, but without leaving the PBC command structure. I'll talk about this in more detail in the POKE and PEEK command description, but note that any PBC commands that require a pin designator will only work on the eight PORT B I / O . Program Operators Symbols Variables can be renamed using the SYMBOL statement. This allows PBC users to change the B0 format to anything they feel describes the variable more effectively.

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