By Lucio Di Jasio
*A Microchip insider tells all at the latest, strongest pix ever! *FREE CD-ROM comprises resource code in C, the Microchip C30 compiler, and MPLAB SIM software*Includes convenient checklists to assist readers practice the commonest programming and debugging tasksThe new 16-bit PIC24 chip presents embedded programmers with extra pace, extra reminiscence, and extra peripherals than ever prior to, developing the potential of extra robust state-of-the-art PIC designs. This booklet teaches readers every little thing they should learn about those chips: how one can software them, the right way to try them, and the way to debug them, as a way to take complete benefit of the services of the recent PIC24 microcontroller architecture.Author Lucio Di Jasio, a PIC specialist at Microchip, bargains certain perception into this progressive expertise, guiding the reader step by step from 16-bit structure fundamentals, via even the main refined programming eventualities. This book's common sense, sensible, hands-on strategy starts easily and builds as much as more difficult routines, utilizing confirmed C programming innovations. skilled PIC clients and novices to the sphere alike will enjoy the text's many thorough examples, which exhibit find out how to nimbly side-step universal hindrances, resolve real-world layout difficulties successfully, and optimize code for the entire new PIC24 positive factors. you are going to examine about:* simple timing and I/O operations, * multitasking utilizing the PIC24 interrupts, * all of the new peripherals * find out how to keep an eye on liquid crystal display screens, * producing audio and video indications, * having access to mass-storage media, * how you can proportion documents on a mass-storage equipment with a laptop, * experimentingwith the Explorer sixteen demo board, debugging tools with MPLAB-SIM and ICD2 instruments, and extra!
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Extra info for Programming 16-Bit PIC Microcontrollers in C: Learning to Fly the PIC 24
The Logic Analyzer window Figure 2-5. Logic Analyzer window showing square-wave plot. Post-flight briefing In this brief lesson, we learned about the way the MPLAB C30 compiler deals with program termination. For the first time, we gave our little project a bit of structure—separating the main() function in an initialization section and an infinite loop. To do so, we learned about the while loop statements and we took the opportunity to touch briefly on the subject of logical expressions evaluation.
Well, this is the time to think again. Shaving one byte at a time off the requirements of your application might, in some cases, mean the ability to select a smaller model of PIC24 microcontroller, saving fractions of a dollar that, when multiplied by thousands or millions of units (depending on your production run rates), can mean real money added to the bottom line. In other words, if you learn to keep the size of your variables to the strict minimum necessary, you will become a better embeddedcontrol designer and ultimately…this is what engineering is all about.
If we need a larger integer numerical range, we can use the long (signed ) integer type as in: long c; The MPLAB C30 compiler will use 32 bits (four bytes) for the variable. If we are looking for a smaller counter, and we can accept a range of values from –128 to +127, we can use the char integer type instead: char c; In this case the MPLAB C30 compiler will use 8 bits (a single byte). 4,294,967,295 There are then variable types defined for use in floating-point arithmetic: float f; long double d; // defines a 32 bit precision floating point // defines a 64 bit precision floating point variable for loops We can now return to our counter example.