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add (2): the external crystal oscillator frequency macro definition system default definition external crystal oscillator is 25 MHz, in stm32fxx. h contains 1 #if !defined (HSE_VALUE) 2 #define HSE_VALUE ((uint32_t)25000000) /*! Our board is 8 MHz. We overwrite this macro definition and redefine it in stm32fxx_conf.h as follows: 1 // sky. zhou, defines the external crystal oscillator 8mhz2 # If defined (hse_value) 3/* redefine the HSE value; it's equal to 8 MHz on the STM32F4-DISCOVERY ki

//************************************ **************************************** * ***************** # include "stm32f10x_lib.h" # include "platform_config.h" static Boolean g_bRTCAlarm = FALSE; /******************************** **************************************** * ****** Function Name: RCC_Configuration * Description: Configures the different system clocks. * Input: None * Output: None * Return: none *************************************** **************************************** /void RC

Official Website: Http://fallabs.com/ Install tokyocabinet ./Configure -- prefix =/usr/local/tokyocabinet -- enable-off64 Make make install Install tokyotyrant ./Configure -- prefix =/usr/local/tokyotryrant -- with-tc =/usr/local/tokyocabinet/ Make make install Verify installation:Run: #./ttservctl start in the tokyotyrant-1.1.41# Telnet 127.0.0.1 1978 the default port is 1978. You can change the configuration in ttservctl.[Ttserver] # curl-x put http: // 127.0.0.1: 1978/sky_key-d "sky"Cr

Introduction to advanced clock control timer tim1 tim8: The advanced control timer of ikef4 contains an automatic reload counter. The input of the counter is a system clock that is pre-divided. This timer can be used for multiple purposes, including vehicle input signal length (input capture mode) or waveform output (output capture, PWM, complementary PWM output with dead zone insertion) The pulse length and waveform cycle can be adjusted within several microseconds by the timer or

-UAS parameter to asynchronously write logs)Tcrmgr sync-port 20000 192.168.0.100 10. Data ImportNote: files in TSV format are separated by tab, for example, Test2 \ tvalue2 \ n.Note: The path is a local path, so it does not need to be an absolute path.Tcrmgr importtsv-port 20000 192.168.0.100 temp/2.tsv 11. Restore data through ulog logsNote: The path is the absolute path on the server.Tcrmgr restore-port 20000 192.168.0.100 $ (PWD)/old_ulog/ 12. Print the Update log (pending, always displ

information of the qmake application. This variable can be used to specify whether to generate the debug mode or the release mode. It can also be used to enable the compiler warning (warn_on outputs as many warning messages as possible) or Close (warn_off-the compiler will output as few warning messages as possible ). It can also be used to configure the Qt library to be loaded. To use qt + multithreading: CONFIG + = qt thread Eg: CONFIG + = debug_and_release CONFIG (debug, debug | release ){ T

STM32F429 LTDC driver diagram, stm32f429ltdc Diagram This article is based on the official ST demo Board STM32F429 Discovery hardware platform and explains the main parameter configuration of LTDC in the form of a picture. The Code mentioned in this article is taken from another article, "LTDC code template of STM32F429". The LCD hardware is 240x320, and the driver IC is ili9341. The purpose of this article is to allow you to master the configuration essentials of the STM32F429 LTDC controller t

Hardware: An stm32 Development Board, St-link/v2 I. hardware related: 1. Pin Connection: Pin7 Pin9 Pin20/pin18 Pin19 2. Set in Keil: 1) In debug, select St-link Debugger 2) Select the St-link debugger and select Settings. 3) select Flash download and add programming algroithm. (I am using a chip of stm32f10x) 2. Software related: Click here: Then you can see: Here is an example of gpio. I have added: cmsis-core (required), device-> gpio (gpi

(generate library files) Template = app Destdir Directory of the generated Application Destdir + = ../bin Ui_dir Specify the UIC command to convert the. UI file to the directory where the UI _ *. h file is stored. Ui_dir + = forms Rcc_dir Specify the RCC command to convert the. qrc file to the directory where qrc _ *. H files are stored. Rcc_dir + = ../tmp Moc_dir Specify the MOC command to

-images are set, the output of tim3_ch2 is mapped to pb.5; if a full re-image is set, the output of tim3_ch2 is mapped to pc.7;PWM output signal: PWM outputs a square wave signal. The signal frequency is determined by the timx clock frequency and the timx_arr pre-divider. The specific setting method is described in detail in the previous timer section. The duty cycle of the second output signal is determined by the timx_crrx register. The calculation formula is as follows: Duty Cycle = (timx_crr

float 6. Set serial port parameters: baud rate, data bit, verification, stop bit, and traffic control 7. Enable serial port, enable input, and enable output OK Void serial_init (void) {/// set serial port debugging /// output: usart1 // pin: pa9 (TX), pa10 (RX) // baud rate: 9600 // data bit: 8 bit (default) (CR1) // verification: none (default) (CR1) // stop bit: 1 bit (default) (CR2) // throttling: none (default) (MCM) /// after clearing the settings, the default system status int I is config

, 8, adc_sampletime_55cycles5 ); /* Enable adc1 DMA */Adc_dmacmd (adc1, enable );/* Enable adc1 */Adc_cmd (adc1, enable ); /* Enable adc1 reset calibaration register */Adc_resetcalibration (adc1 );/* Check the end of adc1 reset calibration register */While (adc_getresetcalibrationstatus (adc1 )); /* Start adc1 calibaration */Adc_startcalibration (adc1 );/* Check the end of adc1 calibration */While (adc_getcalibrationstatus (adc1 ));/* Start adc1 software conversion */Adc_softwarestartconvcmd (ad

I. Clock 1. Three different clock sources can be used to drive the system clock (sysclk ): . HSI oscillator clock high speed internal . HSE oscillator clock high speed external . PLL Clock Phase Locked Loop 2. These devices have two secondary clock sources: . 32 Khz low speed internal RC [1], can be used to drive independent watchdog and RTC. RTC is used to automatically wake up the system from the stopped/standby mode. . 32.768 kHz low-speed external crystals can also be used to drive RTC (rtcc

Display the QT performance of the windows created by cvnamedwindow (char *, int flag), for example, display coordinates, pixel values, amplification, pan, and save, Method 1:Select with_qt when compiling the opencv library. Method 2: After the regular library of opencv is created (that is, the library compiled by with_qt is not selected), you can go to the original directory of c: \ opencv231 \ opencv \ modules \ highgui \ SRC,Copy these three files: window_qt.cpp, window_qt.h, window_qt.qrc, an

the timer resolution, which is exactly the original intention of designing this frequency divider. Ii. Universal timer programming for stm32 Timer programming is interrupt programming. Because the timer MUST be interrupted. Step 1: rcc_configuration (); // set the system clock, including the RCC clock configuration, doubling to 72 MHz. Step 2: Configure gpio using the gpio_cfg () function. The implementation of this function is as follows: Void g

lost for some reason, you can also find backup one (advantage: fast, avoid data transmission in the network), in the near case if the rack is damaged by the scourge, we have a second rack to find data (advantage: Secure)3. Actual Operation HDFs Run the Hadoo first, start the Hadoop code [root@master~]#suhadoop//switch to Hadoop user [hadoop@masterroot]$cd/usr/hadoop/hadoop-1.0.4/bin//into bin directory [ hadoop@masterbin]$ls hadoop start-all.sh stop-balancer.sh hadoop-config.shstart-balanc

, so that a single route is determined between the pair of SNP (A and Z-ends) specified in the subnet; RCC determines a route between a pair of SNP (A and Z-ends) specified in Subnet C. (6) The CCB is connected to the LRMB request link based on the resulting subnet D and E and the routing messages between them connecting links, LRMB can return the link connection information between Subnet D and E to the CCB in any order (such as 6a or 6b in Figure

not from 0Sender's account informationOitem.sendusingaccount = oapp.session.accounts[2];Add a required personRecipient force = OITEM.RECIPIENTS.ADD ("mailuser2@mailserver.com");Force. Type = (int) olmeetingrecipienttype.olrequired;Add an optional personRecipient opt = OITEM.RECIPIENTS.ADD ("mailuser3@p.mailserver.com");Opt. Type = (int) olmeetingrecipienttype.oloptional;Add Meeting InitiatorRecipient sender = OItem.Recipients.Add ("mailuser1@mailserver.com");Sender. Type = (int) Olmeetingrecipi

program, but when using peripherals, the following points are very important. 1.FWLAB file group to add the peripheral library file 2. In the header file Stm32f10x_conf.h, open the macro definition for the corresponding peripheral 3. Initialize the function peripherals according to the requirements of the system 4. Turn on the peripheral's clock 5. Configure nested vector interrupts in the nvic_configuration () function Describes how to use I/O peripherals: 1. Need to add clock (

Note: Use the TIMER1 CH1 that is PA8 port output PWM driver buzzer. The following is the code (applied on stm32f103) void Fn_pwm_init (int16u _pwmfreq){Todo:add Your code here:/* Timer1 Channel 1, PA8 IO initialization */Gpio_pinremapconfig (gpio_partialremap_tim1,enable);Gpio_inittypedef gpio_initstructure;Gpio_initstructure.gpio_pin = Gpio_pin_8;Gpio_initstructure.gpio_mode = gpio_mode_af_pp;Gpio_initstructure.gpio_speed = Gpio_speed_50mhz;Gpio_init (Gpioa, gpio_initstructure);