avr 3806

Question: Code optimization double-edged sword, An error occurs accidentally. Static in GCC, Difficult to detect after an error, If you don't want to cover the road, Volatile! Laboratory development of the sensor network node using the AVR series microcontroller circuit board, AVR-GCC provides 5-level code optimization, because the node Running code is more complex, the functions such as routing, networkin

Because our firmware does not want to use the C library, the linker script and C-runtime both need to be written by themselves, but they have not been written yet. It is nothing more than a few lines of the C library. There is nothing to say, so we will write the main record of the avr c-runtime: 1. set the interrupt vector table (vector), which is defined in Datasheet. Each chip is different, and the number of vectors is also different. To achieve

Software you need to install 1: AVRStudio4.13 2: WinAVR-20080610-install Step 1: Project-> New Project prompt dialog box below. In Project Type, select avr gcc and enter the Name of the Project to be created in Project Name, select the directory where the project is located in Location. If you are not clear about the directory, click Help to read the Help file. Click Next to go to the Next step. When creating the project file directory, you must no

Serial Port and PC communication code based on AVR (uart8-bit data ), In order to continue to improve the function based on this code in the future, we will put the code here and learn it with everyone. /************************************AVR clock: 8.00 MHz * 8-bit data with a baud rate of 9600 (51) and 1-bit data is stopped. When the baud rate is set to 19200, UBRR = 25, 4800 = 103 * Note: The best baud

The principle is not complex, because arduino is already a database with a bunch of avr +, just find a tool that can compile and translate hex and download it to the board. However, we still encounter many problems. First, make: Interrupt/Exception caught (code = 0xc00000fd, addr = 0x4217b3) appears during eclipse + avr plugin compilation) Make cannot contain spaces like Program Files in the path. Copy o

// Compiler: ICC-AVR v6.31A// Target chip: M16// Clock: 8.0000 Mhz/*-------------------------------------------------------------LCD pin Definition1---GND2---VCC3---VO4---RS5---RW6---EN7 to 14--D0-D715 -- background light +16 -- background light------------------------------------------------------------------*/# Include # Include /*---------------------------------------------------------------The following figure shows the connection information be

Since the EEPROM write cycle of the AVR is longer (generally milliseconds), special attention should be paid to it during programming. There's nothing to say about reading an EEPROM, it takes 4 clock cycles to read a byte of data, it can endure, it's more troublesome to write, Although the data placed in the EEPROM is not frequently accessed, although it is possible to use the read-compare-write mechanism to reduce the EEPROM write operation frequency

(1) Installing the development tool chainYum Install avr-*The following tools will be installedavr-gcc-4.7.2-1.fc17.i686Avr-libc-1.8.0-2.fc17.noarchavr-binutils-2.23.1-1.fc17.i686avr-gcc-c++-4.7.2-1.fc17.i686avr-gdb-7.1-4.fc17.i686Avr-libc-doc-1.8.0-2.fc17.noarch(2) installation (Usbkey boot loader)Yum Install Dfu-programmer(3) installation (Avrdude)Yum Install Avrdude(4) Installation and Debugging Tools hardware driver ()Yum Install avarice(5) This s

author cldio often rode a horse named pony. to commemorate his horse, he named the software ponyprog (pony programmer ). Of course, this is just "said ". You can download the latest version of ponyprog from the clodio personal homepage http://www.lancos.com. Although the latest stable version is v2.06, we do not recommend that you download it because this version (and earlier versions) does not support newer AVR Microcontroller (such as tiny13 ).

How to use C language to manipulate the I/O port of AVR (taking iccavr as an example ): Example 1: Define pb0 as output and output as high Ddrb = bit (0); // defines pb0 as the output. Portb | = bit (0); // pb0 outputs a high level Example 2: Define pb0 and PB1 as outputs, and pb0 outputs Low levels. PB1 outputs high levels. Ddrb | = bit (0) | bit (1); // defines pb0 and PB1 as the output. Portb | = bit (0) | bit (1); // pb0, PB1 output high level

Customer need program quickly ASAP. Ok,i need to set-a table for test.1 Reference dataHttp://www.cnblogs.com/tkinter/p/5632273.htmlHttps://github.com/laborer/stcflash2install the Software:python3programing Jig with Paba installYou need the following equipment:1. A Programming Jig for mounting, the PCBA to be programmed.2. A Windows PC with:A. EFM32 programming software.B. Programming adapter with USB cable. You should use SEGGER J-link Base.3. A 3.3V DC power supply for the unit is programmed.4.

Atmega169 tqfp package mainly has the following models: ATmega169V-8AU, ATmega169V-8AI, ATmega169-16AU, ATmega169-16AI. Model ID description:(1) The difference between "V" and "V": the voltage range supported by "V" is 1.8-5.5 V. If "v" is not provided, the supported voltage range is 2.7-5.5 V.(2) The numeric part of the suffix represents the maximum system clock that MCU can support, such as ATmega169V-8AU and ATmega169V-8AI refers to the system clock that can support up to 8 MHz. While ATmega

In a recent project, I learned about the external Ram Extension of the AVR microcontroller, which is recorded here. In this paper, we use a single-chip microcomputer with a single-chip microcomputer as the testing platform and expanded 74hc573 (AHC series are used in the data section. However, I used the HC series to configure the fastest access speed under the 16 m crystal oscillator and did not find anything wrong, of course this is not a rigorous d

microcontroller uses this port to control other circuits, it needs to modify the port level value, which will affect the original level value. So we need to use latches to maintain the original level, and it will not be affected by the new level value of the port. Light up a light emitting diode program code: 1 /************************************** **************************************** ** 2 * features: 3 * Light up the first light emitting diode 4*5 * header file: 6 * the I/O port of the o

(general-purpose registers and I/O registers) are also zeroed by the reset operation.There are 5 reset sources for the ATMEGA16 microcontroller, which are:1, power-on reset. When the system supply voltage is lower than the power-on reset threshold Vpot, the MCU resets.2, external reset. When the external pin reset is low and the low duration is longer than 1.5us, the MCU resets.3, the power-down detection (BOD) reset. When the BOD is enabled and the supply voltage is lower than the reset thresh

We learn MCS51 single-chip microcomputer and AVR MCU, or PIC microcontroller, or MSP430 MCU, whether it feels that he can become an engineer? I'm here to say what I think.We learn these single-chip computer, the first study of theoretical knowledge, this is generally the theoretical knowledge of books, such as the introduction of the development of single-chip microcomputer, the application of single-chip microcomputer, the principle of single-chip mi

Small x's Road construction Description There are n points, M M roads, each road has a cost, now to elect N N-1 1 edges, so that n n points constitute a tree, at this time the total cost of all the selected side of the maximum cost and the minimum

Description Because of a small earthquake, the road between N cities in Y province was damaged, and the governor hoped that the small x would be rebuilt between the cities.The foundations of many cities were destroyed by the earthquake, which made

Three working modes of at90can128 Timer/Counter 3:   Void initpwm (void)// Output compare and PWM output C for Timer/counter3{ Tccr3a = (0 (0 (1 (1 Tccr3b = (1 fast PWM mode (0   Ocr3a = 0x7ff; Ocr3c = 0xff; }   \\

Bit operationOne common task is to program the microcontroller MCU to enable or disable some bit of the IO register. Fortunately, standard C has good and applicable bit operation functions, without the help of assembly instructions or other