By Joe Pardue
Do you need a comparatively cheap approach to examine C programming for microcontrollers? This booklet indicates you the way to exploit Atmel’s $19.99 AVR Butterfly board and the loose WinAVR C compiler to make a really reasonably cheap procedure for utilizing C to strengthen microcontroller initiatives.
Students will locate the thorough assurance of C defined within the context of microcontrollers to be a useful studying aide. pros, even those that already be aware of C, will locate many beneficial proven software program and examples that would pace their improvement paintings.
In addition to an in-depth insurance of C, the ebook has initiatives for:• Port I/O studying switches and blinking LEDs• UART verbal exchange with a laptop• utilizing interrupts, timers, and counters• Pulse Width Modulation for LED brightness and motor pace keep an eye on• making a genuine Time Clock• Making song• ADC: Analog to electronic Conversion• DAC: electronic to Analog Conversion• Voltage, mild, and temperature size• creating a sluggish functionality Generator and electronic Oscilloscope• liquid crystal display programming• Writing a Finite nation computing device
CD includes all of the resource code, the unfastened WinAVR C compiler, AVRStudio, and plenty of different worthy issues.
Read or Download C Programming for Microcontrollers Featuring ATMEL's AVR Butterfly and the free WinAVR Compiler PDF
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Additional info for C Programming for Microcontrollers Featuring ATMEL's AVR Butterfly and the free WinAVR Compiler
An example of the kind of confusion you can run into when you use the ‘=’ assignment operator and the ‘==’ ‘is equal to’ operator: x = y; if(x==y) _delay_loop_2(30000); The first statement assigns x to the value of y. The second calls the _delay_loop_2(30000) function if x is equal to y. What about: if(x=y) _delay_loop_2(30000); //BAD STATEMENT This will set x equal to y, and then call the _delay_loop_2(30000) function. The ‘if ’ becomes meaningless because the condition, x=y, is always true, so the delay will always run.
Besides, you couldn’t pay for all the debugging education I bet you got just trying to follow what I was telling you. If you think the ‘Quick Start’ section was confusing, you should try reading all the stuff it’s based on. 37 Chapter 3: A Brief Introduction to C – What Makes Blinky Blink? Chapter 3: A Brief Introduction to C – What Makes Blinky Blink? c to help begin understanding what each line means. Later, these items will be covered in greater detail in context of programs written specifically to aid in learning the C programming language as it is used for common microcontroller applications.
Experienced microcontroller programmers memorize the binary equivalent of hex digits and find hex numbers very useful. For instance, given 0xA9, what would the LEDs (or the voltage states of an 8-bit register) look like? If you memorize the table, you come up with 0xA = 1010 and 0x9 = 1001, so the LEDs (voltage states) will look like: 10101001. As pointed out earlier, ask the same question in decimal, what will 169 look like on the LEDs and good luck, on doing that in your head. Look at Appendix 5 to see all the byte states in decimal, hexadecimal, and binary.