rcc boots

Step 1: configure the gpio serial port RCC-> apb2enr | = 1 Gpiob-> CRL = 0xff0fffff; // bit Initialization Gpiob-> CRL | = 0x00300000; // pb.5 push-pull output Gpiob-> ODR | = 1 Ii. Three Methods to set the IO port level 1. macro definition: # define beep pbout (8) beep = 0; 2. gpiob-> ODR | = 1 3. gpiob-> BRR | = 1 3. Simple button Program # Define key0 pein (4) // PE4 If (key0 = 0) { Delay_ms (10); // dejitters If (key0 = 0) led0 = 0; }

corresponding to the peripheral device is input. You can select floating input, pull input, or drop-down input based on the peripheral circuit configuration. 3. ADC pins: configure the pins as analog input. If the port is configured with the multiplexing output function, the pin is disconnected from the output register and connected to the output signal of the peripherals on the chip. After the PIN is configured as the output multiplexing function, if the peripheral is not activated, its output

generated pro file. Use qmake-help (-Help, Linux style) to view help information 5. Generate the MAKEFILE file E: \ projects \ QT \ demo> qmake demo. ProRCC: Warning: no resources in 'demo. qrc '.RCC: Warning: no resources in 'demo. qrc '. 6. compile the project E: \ projects \ QT \ demo> nmake debug release Nmake generates debug by default .............. After compilation information or warning information (the MOC _ *. cpp file can be generated d

configuration options to any existing one. It is safer to replace all specified options as "=.A> the QT section tells qmake that the application uses QT to connect to the program. This means that qmake considers the QT library when connecting and adding the required include path for compilation.B> the warn_on section tells qmake to set the compiler to output warning information.C> the release section tells qmake that the application must be connected to a published application. In the developme

pwm_configuration (void){Gpio_inittypedef gpio_initstructure; Tim_timebaseinittypedef tim_timebasestructure; /* Gpiob clock enable */// RCC clock enabling for gpiobRcc_apb2periphclockcmd (rcc_apb2periph_gpiob | rcc_apb2periph_afio, enable );// Configure the gpio usedGpio_initstructure.gpio_pin = gpio_pin_8 | gpio_pin_9;Gpio_initstructure.gpio_mode = gpio_mode_af_pp; // gpio_mode_out_pp ;//;Gpio_initstructure.gpio_speed = gpio_speed_50mhz;Gpio_init (g

STM32 is a 32-bit MCU based on ARM Cortex-M3 kernel, clock speed up to 72 M. Recently, because we want to integrate the TPMS function on the vehicle, we began to develop STM32. There are five serial ports in the STM32F10x series (USART1 ~ USART5), supports DMA Communication. Because the DMA mode does not require CPU involvement, the DMA controller directly reads and writes serial data, thus greatly improving the CPU utilization. Before using the STM32 serial port, You need to perform a series of

disabled.ValueNonmaskableint_irqn 2 Non Maskable InterruptMemorymanagement_irqn 4 Cortex-M3 Memory Management InterruptBusfault_irqn 5 Cortex-M3 Bus Fault interruptUsagefault_irqn 6 Cortex-M3 usage fault interruptSvcall_irqn 11 Cortex-M3 SV call interruptDebugmonitor_irqn 12 Cortex-M3 debug monitor interruptPendSV_IRQn 14 Cortex-M3 Pend SV InterruptSysTick_IRQn 15 Cortex-M3 System Tick InterruptWWDG_IRQn Window WatchDog InterruptPVD_IRQn PCIe through EXTI Line detection InterruptTAMPER_IRQn Tam

can be obtained by dividing the clock into 1Hz for RTC. The discovery board in this experiment does not have LSE, and the external crystal oscillator is 8 m, and cannot be used. Only the LSI clock can be used for RTC experiments. This experiment should first enable the LSI clock. Set the LSI clock to the RTC clock. The operation is set through RCC. This register is not configured in the RTC part: Rcc_lsicmd (enable );While (rcc_getflagstatus (r

(RCC)96. composite metal foil: Composite Metallic Material97. Carrier foil: Carrier Foil98. Invar99. foil (profile) profile: foil Profile100. glossy: shiny side101. Rough Surface: matte side102. Processing surface: treated side103 anti-rust treatment: stain Proofing104 double-sided copper foil: Double treated FoilIv. Design1. Schematic diagram: shematic dimo-2. Logic Diagram: logic digoal3. Print line layout: printed Wire Layout4. layout diagram: mas

-license-QT-zlib-QT-libpng-QT -libjpeg-QT-GIF-no-qt3support-nomake examples-nomake demos-no-WebKit-no-phonon-backend-no-Accessibility-no-scripttools-qconfig Ranger 2. It is encountered when compiling the qtgui part, but not every time. It does not exist during the first compilation.Mipsel-Linux-G ++-C-include. PCH/release-shared-Emb-MIPS/qtgui-pipe-mips32-fno-tions-O2-fvisibility = hidden-fvisibility-inlines-hidden-wall-w-d_reentrant-FPIC- dqt_shared-benchmark-dqt_moc_compat-compute-dqt_no_fontc

3. system_stm32f10x.h and. C, in these two files: A. define a global variable uint32_t systemcoreclock: The system clock frequency depends on your choice B. systeminit (): This function is called in the startup file. (1) At the beginning of system_stm32f10x.c, select the system clock frequency, For example, # define sysclk_freq_24mhz 24000000 (2) Use the systeminit () function to output the sysclk = hclk = pclk1 = pclk2 = PLL 24 MHz. Note: This is the condition when HSE is 8 MHz. If HSE is not

, 16 bitsByte sequence_no [4]; // 32-bit, indicating that the data of the Message end is located in a certain byte Number of all data blocksByte ack_no [4]; // 32-bit, confirmation number, indicating the number of data blocks received by the receiverUnsigned char offset_reser_con; // The data offset is 4 bits. The reserved value is 6 bits and the control bits are 6 bits.Unsigned char th_flag;Byte window [2]; // window 16 bitsByte checksum [2]; // check code, 16 bitsByte urgen_pointer [2]; // 16-

file.Vclib-Create a library of VisualStudio project files.Subdirs-This is a special template that creates cascading subdirectories for project management.(Eg:template = SubdirsSubdirs + = OneSubdirs + =)3. Specify the directory where the generated application is placed DESTDIR + =. /bin;4. Specify the generated application name TARGET = Pksystem (same as pro filename);5, configuration information, config is used to tell Qmake about the application configuration information.For example config+=

, CAN, USB, i2c1, I2C2, UART2, UART3, SPI2, window watchdog, Timer2, Timer3, Timer4. Note that the USB module requires a separate 48MHz clock signal, but it should not be a clock for the USB module to work, but simply a clock to be used by the serial Interface Engine (SIE). The clock that the USB module works on should be provided by APB1.The devices connected to the APB2 (high-speed peripherals) are: Gpio_a-e, USART1, ADC1, ADC2, ADC3, TIM1, TIM8, SPI1, AFIO;Using the HSE clock, the program set

" recommended download manual see.Ⅳ, source code AnalysisThe author uses the F4 standard peripheral library (also suggests that beginners use the official standard peripheral library) as the foundation of the project, mainly in the way of library to tell.Source code in many places is the same as the previous article source code, only modified a few places (in fact, the main increase in the capture duty-related configuration): The input pin configuration, Tim capture configuration and its interru

Currently the most popular way to learn STM32 is to use the firmware library!! (temporarily using Register version)The role of the Systeminit function is to turn the external crystal through a phase-locked loop to make the system clock 180MHZ. (implemented in the firmware repository version).The Systeminit function can be implemented in the Main.c file, but there is no function body; if we do not implement this function, that is, the system clock is set to 180MHZ, then how does the system clock

whether GCC accepts-g ... yesChecking for GCC option to accept ANSI C ... none neededChecking how to run the C preprocessor ... gcc-e Checking for g++ ... no NBSP ; , NB Sp , NB Sp NBSP;NBS P; Checking for C + + ... no NBSP ; , NB Sp , NB Sp NBSP;NBS P; Checking for gpp ... no NBSP ; , NB Sp , NB Sp NBSP;NBS P;

I finally wrote the first code today. Also roughly familiar with the process of 32, today finally feel, actually a lot of things, you just started to look at the time is really difficult, but as long as you do not give up, every day to see him, one day you will be enlightened.Really, yesterday look at these processes is really big head, and the clip in a quick about more than 10 files to build, there are a lot of file classification placement, is really super trouble, and today contrast the rati

, the following rules is respected:· Re-entrant code does not hold any static (or global) Non-constant data:reentrant functions can work with global data. For example, a re-entrant interrupt service routine can grab a piece the hardware status to work with (e.g. serial port Rea D buffer) which is isn't only global, but volatile. Still, typical use of the static variables and global data are not advised, in the sense this only atomic read-modify-write ins Tructions should is used in these variabl

) find_package (qt5widgets) find_package (Qt5quick) ADD_DEFINITIONS (${QT _definitions}) # (3) Convert. h file to MOC operation, UI file for UIC operation, resource file for RCC operation message (STATUS "Directory" ${cmake_current_source_dir}) # Set (Cendvc_headers ${cmake_current_source_dir}/cendvc.h) set (Cendvc_qrcs ${CMAKE_CURRENT_SOURCE_DIR}/CENDVC.QRC) Set (Cendvc_srcs ${cmake_current_source_dir}/main.cpp ${cendvc_qrcs}) set (Cendvc_rc_file ${c