A Note on Trace Displays Figure 5.
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More recent versions of MPLAB have the line numbers counting up from a negative number, to line 0, where the breakpoint occurs. Both versions display from top to bottom. The difference is that one ends on line 0, while the other starts there! It's as if this version is actually showing the flow of instructions in the pipeline. Thus every branch instruction is accompanied by a NOP. Therefore, for the same Trace operation, there are more lines in a Version 7.
The equivalent screen image for Figure 5. The total number of lines in this Trace is If you count all of these NOPs, and subtract that from , you get to the lines of Figure 5.
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Interestingly, the number of cycles is the same in each print, except that the book print does not indicate that the final GOTO instruction will take 2 cycles. Errata Page the explanation relating btfsc and btfss in the second to last paragraph is reversed. Page first line last paragraph, should read "The simple delay loop of Program Example 5. Errata Page , Simulation Exercise 6.
The relevant sentences can be rewritten:. See the Hardware Stack change, program execution transfer to the ISR, and on ISR completion the program resuming after the instruction where it was interrupted. Fire the RB0 pin again returning it to 0 , and continue stepping.
Designing Embedded Systems with PIC Microcontrollers: Principles and Applications
This will cause no change to program execution, as the interrupt edge response will be positive-edge triggered only the INTEDG bit has been left at Reset value of 1. Page Program Example 6. Page the last paragraph should reference Fig. Chapter 7. Errata The last two lines of page should read:. Page bottom line, replace ns with ns. Page Caption of Fig. Page first line, replace "debugger" with "programmer".
Chapter 9. Using the Futaba S Servo. This servo is power hungry, as mentioned in the first paragraph of 9. That's why in Program Example 9.
Designing Embedded Systems with PIC Microcontrollers : Principles and Applications
However experience with a number of builds has shown that the values used still leave the performance "on edge". Errata Section 9. If used with a SRF05 sensor, then it doesn't work, as there is a longer time delay between pulse input, and echo pulse output. Therefore the us delay introduced in the program is inadequate. A simple program change is to remove the us delay, and insert these two lines, causing a wait until the echo pulse goes high:.
DESIGNING EMBEDDED SYSTEMS WITH PIC MICROCONTROLLERS principles and applications
This textbook will be ideal for introductory courses and lab-based courses on embedded systems, microprocessors using the PIC microcontroller, as well as more advanced courses which use the 18F series and teach C programming in an embedded environment. Engineers in industry and informed hobbyists will also find this book a valuable resource when designing and implementing both simple and sophisticated embedded systems using the PIC microcontroller.
He has been designing embedded systems since the early days of microcontrollers. For many years this was for Cambridge University, where he led a development team building original systems for research applications - for example in measurement of bullet speed, wind tunnel control, simulated earthquakes, or seeking a cure to snoring. Myke Predko. Sam Sony. K Sinha.
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