By Dr. Mark Fisher
ISBN-10: 1782176500
ISBN-13: 9781782176503
About This Book
- This publication makes a speciality of programming embedded platforms utilizing a pragmatic approach
- Examples express tips to use bitmapped portraits and manage electronic audio to supply awesome video games and different multimedia applications
- The recipes during this publication are written utilizing ARM's MDK Microcontroller improvement equipment that's the main finished and obtainable improvement solution
Who This publication Is For
This e-book is aimed toward people with an curiosity in designing and programming embedded structures. those may perhaps comprise electric engineers or laptop programmers who are looking to start with microcontroller purposes utilizing the ARM Cortex M4 structure very quickly body. This book's recipes is additionally used to help scholars studying embedded programming for the 1st time. easy wisdom of programming utilizing a high-level language is vital yet these accustomed to different high-level languages equivalent to Python or Java shouldn't have an excessive amount of trouble selecting up the fundamentals of embedded C programming.
What you are going to Learn
- Use ARM's uVision MDK to configure the microcontroller run time surroundings (RTE), create initiatives and collect, obtain, and run uncomplicated courses on an review board
- Use and expand equipment relatives packs to configure I/O peripherals
- Develop multimedia purposes utilizing the touchscreen and audio codec beep generator
- Write multi-threaded courses utilizing ARM's real-time working procedure (RTOS)
- Write severe sections of code in meeting language and combine those with capabilities written in C
- Fix difficulties utilizing ARM's debugging software to set breakpoints and consider variables
- Port uVision initiatives to different open resource improvement environments
In Detail
Embedded microcontrollers are on the middle of many daily digital units. The so-called web of items drives the marketplace for such know-how, lots in order that embedded cores now symbolize ninety% of all processors offered. The ARM® Cortex® M4 is among the strongest microcontrollers out there. The e-book starts with an advent to the ARM® Cortex® family members and we conceal the install of the ARM® uVision built-in improvement surroundings and issues comparable to objective units, evaluate forums, code configuration, and GPIO. you'll then know about center programming subject matters. you will discover out approximately complicated facets comparable to facts conversion, multimedia aid, real-time sign processing, and real-time embedded structures. by way of the top of the booklet, it is possible for you to to effectively create strong and scalable ARM® Cortex® dependent applications.
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Extra resources for ARM Cortex M4 Cookbook
Example text
Configure PuTTY as shown in part a) of the following image. org/wiki/RS-232). RS232 is a 2-wire full-duplex communications standard. PuTTY manages the protocol at the PC, but we are responsible for the evaluation board. To use serial I/O, we need to configure the microcontroller's Universal Synchronous/Asynchronous Receiver/Transmitter (USART). We can do this by including a peripheral driver applications interface (API) in our project. uVision5's RTE manager includes a suitable API, but this provides many more features than we need for our simple helloWorld recipe.
C comprises three functions SER_Init(), SER_PutChar(), and SER_GetChar(). The function SER_Init() is the first function called by main(). It initializes the USART peripheral by writing values to its registers so that it is configured to mirror the channel setup in PuTTY (that is, 115200 baud, 8 data-bits, 1 stop-bit). These parameters are critical. The baud rate is derived from the Peripheral Clock, and in turn the System Clock, so any change in the clock configuration will affect the baud rate.
Declare the function by including a function prototype declaration at the start of the program (that is, before the function is defined). void delay (unsigned int); 4. Replace the statements: for (i = 0; i < 1000000; i++) /* empty statement */ ; /* Wait */ 5. Call the following function: delay (num_ticks); 6. Declare a new variable in main() and initialize it. const unsigned int num_ticks = 500000; 7. The relevant changes are shown as follows (omitting boilerplate code): void delay (unsigned int); /* Func Prototype */ int main (void) { const unsigned int max_LEDs = 8; const unsigned int num_ticks = 500000; unsigned int num = 0; HAL_Init ( ); /* Init Hardware Abstraction Layer */ SystemClock_Config ( ); /* Config Clocks */ LED_Initialize ( ); /* LED Init */ for (;;) { LED_On (num); delay (num_ticks); LED_Off (num); 38 /* Loop forever */ /* Turn LEDs on */ /* Turn LEDs off */ Chapter 2 delay (num_ticks); num = (num+1)%max_LEDs; } /* end for */ } /* end main ( ) */ void delay (unsigned int d){ unsigned int i; for (i = 0; i < d; i++) /* empty statement */ ; } /* end delay ( ) */ /* increment num (mod-8) */ /* Function Def */ /* Wait */ How it works… Essentially, we've moved the for loop which implements the delay to within the function.