apb desk

(timer) 1 time multiplier used. The multiplier can choose 1 or twice times, the clock output for the timer 1 use. In addition, the APB2 divider has one output for the ADC divider, which is used for the ADC module. The ADC divider can be divided into 2, 4, 6, 8.In the above clock output, there are many with enable control, such as AHB bus clock, core clock, a variety of APB1 peripherals, APB2 peripherals and so on. When you need to use a module, be sure to first enable the corresponding clock.No

The Axi full name advanced Extensible Interface is an interface protocol that Xilinx introduced from the 6 series FPGA, primarily describing the way data is transferred between the master and slave devices. Continue to use in Zynq, version is AXI4, so we often see AXI4.0,ZYNQ internal devices have Axi interface. In fact, Axi is a part of the AMBA (Advanced microcontroller bus Architecture) proposed by arm, a high-performance, high-bandwidth, low-latency on-chip bus that is also used to replace t

question.(Original file name: s3c2440. JPG)s3c2440 = arm920t + a bunch of things hanging on AHB + a bunch of stuff hanging on an APBarm920t = Arm920tdmi + a bunch of stuffs3c2440 inside the peripherals are OK, follow datasheet come on the line.The bottom point is on the arm920t.(2) Understanding arm920tClear purpose after straight www.arm.com click documention link(Original file name: ARM header.) JPG)The information was uploaded a few days ago.http://www.ouravr.com/bbs/bbs_content.jsp?bbs_sn=3

value of the IC1 capture register and calculates the duty ratio/* Frequency computation */Frequency = 72000000/ic2value; Calculates the PWM frequency.}Else{dutycycle = 0;Frequency = 0;}}Note (a): If you want to change the measured PWM frequency range, the TIM clock frequency can be divided processingTim_timebasestructure.tim_period = 0xFFFF; Cycle 0~FFFFTim_timebasestructure.tim_prescaler = 5; Clock frequency division, the number of 5+1 that is 6 dividedtim_timebasestructure.tim_clockdivision =

, I hope you can point out.A particular area to noteWhen the default parameters and virtual functions appear together, the situation is a bit complicated and prone to error. We know that virtual functions are dynamically bound, but for efficiency, the default parameters are statically bound.1 classB2 {3 Virtual voidVfun (inti =Ten);4 }5 classD: PublicB6 {7 Virtual voidVfun (inti = -);8 }9d* PD =NewD ();Tenb* PB =PD; OnePd->Vfun (); APb->vfun ();The

look at the aige.introduction of the Principle of Android page Flip effect introduced into the polylineThere are some computational principles here to leave a note .x, y are the short and long edges of the folded triangle; O (A, B) point is the touch pointSet k = w-a, L = H-b? OMA, drawn by the Pythagorean theorem,? OMA and? Aob? The area of the APB and the area equal to the trapezoidal MOBPsubstituting X, Solutionsubstituting the touch point (A, B) t

"; Pinctrl-0 = ; };Modify the At91sam9x35ek DTS file to add a pwm-beeper device[Email protected] linux-at91-linux4sam_5.3]$ Vim arch/arm/boot/dts/At91sam9x35ek.dts AHB {apb {macb0: [email protected] {PHY-mode ="Rmii"; Status="Okay"; }; PWM0: [email protected] {Pinctrl-names ="default"; Pinctrl-0= ; Status="Okay"; }; ..... buzzer {compatible ). ....="Pwm-beeper"; Pwms= 2 1000000 0>; Pinctrl-names ="default"; Pinctrl-0= ; Status=

(*serial_out) (struct uart_port *, int, int); unsigned int IRQ; /* IRQ Number */unsigned long irqflags; /* IRQ Flags */unsigned int uartclk; /* Base UART clock */unsigned int fifosize; /* TX FIFO size */unsigned char x_char; /* Xon/xoff char */unsigned char regshift; /* Reg OFFSET Shift */unsigned char iotype; /* IO access style */unsigned char unused1; #define UPIO_PORT (0) #define UPIO_HUB6 (1) #define Upio _mem (2) #define

following code defines two classes (that is A B , and), which B derive from A . (For more information about inheritance, see derived classes.) Then define bObject , type B the object and two pointers (and) to the object pA pB .//Conve__pluslang_pointers_to_classes.cpp//C2039 expectedclassA { Public: intacomponent; intAmemberfunc (); }; classD | PublicA { Public: intbcomponent; intBmemberfunc (); }; intMain () {B bobject; A*PA = Bobject; B*PB = Bobject; PA->amemberfunc ();//OK in c

' or ' 1 'If it is used in an application, then cat can be replaced with the Read function, and Echo can replace the Write function.2) Set the outputSet the C1 pin to output and set the level:Cd/sys/class/gpioecho > ExportCD pioC1echo Out > directionEcho 1 > valueecho 0 > value=========================== external Interrupt key ===========================External interrupts are implemented in two ways, pure Drive mode and key mode1. Pure Drive ModeIf you want to add a key driver named Btn_test,

process Analysis of registering platform_device from DTS file based on Linux 3.10.49 kernel Linux kernel 3.10.49+Here, let's talk about how Linux registers and initializes onboard information through DTS for device (Platform_device).Locate the Dt_machine_start and Machine_end macros in ARCH/ARM/MACH-******/******.C, as follows:Dt_machine_start (******_dt, "************* SoC (flattened Device tree)"). Atag_offset = 0x100,. Dt_compat = ******_dt_compat,//matching DTS. Map_io = ******_map_io,//boa

Reproduced from:http://www.thws.cn/article.asp?id=10901, look at the face of the big star2, Super interesting Flash website, virtual office3, personally tattoo the beauty4, the input text will make a sound! Only support Traditional Chinese, but also a good place to learn Mandarin and CantoneseGrinding Sword Cottage (THW ' s blog)5, make an APB online.Grinding Sword Cottage (THW ' s blog)6, make your own cartoon big picture BarGrinding Sword Cottage (T

Rtc_inittypedef rtc_initstructure; Rtc_timetypedef rtc_timestructure; Rtc_datetypedef rtc_datastructure; /**************************************************************************************** * Function Name: BSP_INITRTC * Function function: Initialize RTC * Formal Parameters: None * Return value: None *****************************************************************************************/ void Bsp_initrtc (void) { Rtc_inittypedef rtc_initstructure; Rcc_apb1periphclockcmd (rcc_apb

(PWR_CR) enables access to the backing register and RTC to call the library function:Call Library functions:Pwr_backupaccesscmd (ENABLE); Step three: Initialize reset BKP RegisterCall Library functions: Bkp_deinit (); Fourth step: Set RTCCLK, as shown below: We need to set the RTCCLK to Lseosc this 32.768KHZ crystal oscillator. Called Library functions:Rcc_lseconfig (rcc_lse_on); while (! Rcc_getflagstatus (Rcc_flag_hserdy));//wait to start after Setup Fifth step: Select the RTC input clock as

little, we do products and projects are more reference. Small-capacity and high-capacity products are an extension of the medium-capacity product (stm32f103x8/b), and the data sheet for small volumes is the STM32F103X4/6 data sheet and the STM32F103XC/D/E data sheet. Small capacity products have smaller flash memory, RAM space and fewer timers and peripherals. Large-capacity products have large flash memory, RAM space and more on-chip peripherals such as SDIO,FSMC,I2S and DACS, while maintainin

by one. Two supported PLL, On-chip MPLL and UPLL, support slow clocks without PLL and connect/disconnect the clock to reduce power consumption:UPLL:UPLL generates the clock to operate USB Host/Device. USB block (48 Mhz ).MPLL:MPLL generates the clock to operate MCU at maximum 400 Mhz @ 1.3V.Fclk Up to 400 MHz/Hclk Up to 136 MHz/Pclk Up to 68 MHz FCLK-> CPU core (ARM920T) HCLK-> AHB bus peripherals. as memory controller, the interrupt controller, the LCD controller, the DMA and USB host blockPCL

# Apb ** In the chat module, whether the dual chat can learn from icq can be directly called by both parties. However, it may be difficult to store emails in the chat results. at the same time, it is compatible with the telnet function, when the upper-layer service layer is telnet, a dedicated module is added for processing. (.? | T4 ** Does the chat room module use shared memory or database? Open the room, which contains permission issues. New funct

present I have not found that does not apply this sentence, if there are errors, I hope you can point out.A particular area to noteWhen the default parameters and virtual functions appear together, the situation is a bit complicated and prone to error. We know that virtual functions are dynamically bound, but for efficiency, the default parameters are statically bound.1 classB2 {3 Virtual voidVfun (inti =Ten);4 }5 classD: PublicB6 {7 Virtual voidVfun (inti = -);8 }9d* PD =NewD ();Tenb* PB =PD

Note: Regardless of whether the APB Zero module is installed, you can use the cross-domain First configure the Web API: 1. Under the Web API Project, install the package Install-package Microsoft.AspNet.WebApi.Cors 2. Then in Webapimodule method Initialize, add the following code: (The code is best on the top of Configureswaggerui) // set up cross-domain var New Enablecorsattribute ("*""*" "*"* "); true ;

peripheral use (PCLK1, the maximum frequency 36MHz), the other way to the timer (timer) 2, 3, 4 times frequency multiplier used.　　The multiplier can choose 1 or twice times, the clock output for Timers 2, 3, 4 use. ⑤, give APB2 divider. APB2 crossover can choose 1, 2, 4, 8, 16, the output of the APB2 peripheral use (PCLK2, the maximum frequency 72MHz), and the other way to the timer (timer) 1 time multiplier used. The multiplier can choose 1 or twice times, the clock output for the timer 1 use.