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Proteus8.9 VSM Studio WINAVR编译器仿真ATmega16系列a25_Flash程序空间中数据访问

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*本文及代码参阅彭伟《单片机C语言程序设计实训100例》一，打开文件（可以随文下载放置在文档中打开）。(如下图1所示) 图1 二，调整原理图大小，适合可视，另存工程文件。(如下图2，3，4所示) 图2 图3 图4 三，点击Source Code标签。(如下图5所示) 图5 四，编辑main.c Proteus8.9 VSM Studio WINAVR编译器仿真ATmega16系列a25_Flash程序空间中数据访问 (如下图6所示) 图6 五，Main.c 代码： //----------------------------------------------------------------- // 名称: Flash程序空间的数据访问 //----------------------------------------------------------------- // 说明: 本例运行时,按下K1将读取并显示存放于Flash程序内存中的 // 320个字节数据及60个字数据. // //----------------------------------------------------------------- #include “myfunc01.h” //-----------------------------------------------------

How to convince avr-gcc, that the memory position of a global byte array is a constant

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问题 I writing a fast " 8 bit reverse "-routine for an avr-project with an ATmega2560 processor. I'm using GNU C (WinAVR 20100110) version 4.3.3 (avr) / compiled by GNU C version 3.4.5 (mingw-vista special r3), GMP version 4.2.3, MPFR version 2.4.1. First I created a global lookup-table of reversed bytes (size: 0x100): uint8_t BitReverseTable[] __attribute__((__progmem__, aligned(0x100))) = { 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0, 0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0, [...] 0x1F,0x9F,0x5F

memcpy_P function AVR?

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问题 void * memcpy_P( void * dest, PGM_VOID_P src, size_t n ) Could someone please tell me where the above function is implemented in the avr libc library? I can only seem to find a definition for the function in a few header files, not the actual implementation. The reason I want to do this is because at the moment I am doing so performance testing on the AVRAtmega128rfa1 and I need see the AVR assembly code for the function too see how long it takes to execute. Thanks. 回答1: In avr-libc-1.8.0,

Build AVR Studio 4 project in AVR Studio 5

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问题 I have an AT90USB162 Minimus AVR which I want to integrate into a project. I downloaded the demo code from Minimus USB. This is a driver for using the AVR as a COM port. The project is written for AVR Studio 4, and cannot be loaded as-is in AVR Studio 5. How can I convert the project for use with AVR Studio 5? 回答1: Well, I just got to build the package. The problem is that the original sources were configured to be built in AVR Studio v.4, and mine is v.5, so I had to convert them to my

Basic I/O in Microcontroller AVR using WinAVR

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问题 I want to drive a BLDC motor, i use ATMEGA32 as CPU of controller , i have a problem in reading hall effect sensor from BLDC motor this is my code : DDRB=(1<<0)|(1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<5); DDRD=(0<<0)|(0<<1)|(0<<2)|(0<<3); PORTD=(1<<0)|(1<<1)|(1<<2)|(1<<3); PORTB as OUTPUT and PORTD as INPUT this is main program : if (~(PORTD &(1<<0)) && PORTD &(1<<1) && ~(PORTD &(1<<2))) /// 0 1 0 { PORTB=(1<<0)|(0<<1)|(0<<2)|(1<<3)|(0<<4)|(0<<5); } else if (~(PORTD &(1<<0)) && PORTD &(1<<1) && PORTD

How to find the address of a variable when using AVR?

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问题 I am trying to write a program that detects pixel level collision of bitmaps on a Teensy micro controller compiling with AVR-GCC. I am trying to work out how to calculate the position of a single byte of the bitmap on the screen and have been told I should be using pointers. I don't see the relationship between the physical address of a bitmap byte and it's position on the screen, but I would like to investigate. The problem is, I have no way of printing this address. AVR doesn't have printf

WINAVR not finding file in include path with whitespace

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问题 When I supply an path for EXTRAINCDIRS (in the Makefile, following the sample provided by WINAVR) without whitespace, the compiler is able to find my header file, but when I use a path containing whitespace (enclosed in quotation marks, as the comments in the Makefile direct), it raises: error: No such file or directory . "d:/dev/avr/atmega/shared/" # will search files in this dir "d:/dev/avr/atmega/sha ed/" # will not search this dir for files I mean, the comments say: # List any extra

Using Visual Studio to code for AVR

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问题 I am using Visual Studio 2013 to write code for AVR. I have been following this tutorial. Whilst writing the code, I noticed that Visual Studio kept on underlining things like DDRB or PORTB and I keep on getting errors like Error: identifier "PORTB" is undefined , however, the program compiles correctly. Interestingly enough, upon pressing alt - F12 Visual finds numerous files where they are defined. 回答1: Your Makefile runs compiler with an option -mmcu=YOURCHIP. This implicitly defines macro