Advanced Pic Microcontroller Projects In C by Dogan Ibrahim

By Dogan Ibrahim

This ebook is perfect for the engineer, technician, hobbyist and scholar who've wisdom of the fundamental rules of PIC microcontrollers and wish to boost extra complex purposes utilizing the 18F series.

The structure of the PIC 18FXXX sequence in addition to common oscillator, reset, reminiscence, and input-output circuits is totally exact. After giving an creation to programming in C, the e-book describes the undertaking improvement cycle in complete, giving information of the method of enhancing, compilation, blunders dealing with, programming and using particular improvement instruments. the majority of the e-book provides complete info of attempted and established hands-on initiatives, comparable to the 12C BUS, USB BUS, CAN BUS, SPI BUS and real-time working systems.

  • A transparent advent to the PIC 18FXXX microcontroller's architecture
  • 20 initiatives, together with constructing instant and sensor community purposes, utilizing I2C BUS, USB BUS, CAN BUS and the SPI BUS, which provide the block and circuit diagram, software description in PDL, software directory and application description
  • Numerous examples of utilizing developmental instruments: simulators, in-circuit debuggers (especially ICD2) and emulators

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An internal clock can be from 31KHz to 8MHz and is selected by registers OSCCON and OSCTUNE. 21 shows the bits of internal clock control registers. Clock Switching It is possible to switch the clock from the main oscillator to a low-frequency clock source. For example, the clock can be allowed to run fast in periods of intense activity and slower when there is less activity. In the PIC18F452 microcontroller this is controlled by bit SCS of the OSCCON register. In microcontrollers of the PIC18F family that do support an internal clock, clock switching is controlled by bits SCS0 and SCS1 of OSCCON.

Normalize the number.  The sign of the result is the EXOR of the signs of the two numbers. Since the exponent is processed twice in the calculations, we have to subtract 127 from the exponent. An example showing the multiplication of two floating point numbers follows. 7510 in floating point and then calculate their multiplication. ” The sum of the exponents is 126 þ 126 ¼ 252. Subtracting 127 from the mantissa, we obtain 252 – 127 ¼ 125. The EXOR of the signs of the numbers is 0. 375), which is the correct result.

Since subroutine and interrupt call/return operations are handled automatically by the C language compiler, their operation is not described here in more detail. Program memory is addressed in bytes, and instructions are stored as two bytes or four bytes in program memory. The least significant byte of an instruction word is always stored in an even address of the program memory. An instruction cycle consists of four cycles: A fetch cycle begins with the program counter incrementing in Q1. In the execution cycle, the fetched instruction is latched into the instruction register in cycle Q1.

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