gamersfirst apb

output for Timers 2, 3, 4, 5, 6, 7 use.⑦ sent to APB2 divider. APB2 Divider can choose 1, 2, 4, 8, 16 divided, its output for APB2 peripheral use (PCLK2, the maximum frequency of 72MHz), and the other way to the timer (Timer1, Timer8) 1, twice frequency multiplier used. The multiplier can choose 1 or twice times, the clock output for the timer 1 and timer 8 use. In addition, the APB2 divider has one output for the ADC divider, and the ADCCLK clock is sent to the ADC module for use after dividin

are band-enabled, such as AHB bus clocks, core clocks, various APB1 peripherals, APB2 peripherals, and so on.When a module needs to be used, the corresponding clock must be enabled first. Note that the timer multiplier, when the division of the APB is 1 o'clock, its multiplier value is 1, otherwise its multiplier value is 2.The devices connected to the APB1 (low Speed peripherals) are: Power Interface, Backup interface, CAN, USB, i2c1, I2C2, UART2, U

1.what is transaction?Network transactionsTcp / ipWifi3g/4gBus transactionsAmba-ahb/apb/axiPci/pci-eSataUsbSdInstructionsx86Arm2.UVM Transaction Flow3.UVM Modeling Transaction3.1 derived from Uvm_sequence_item base classBuilt-in support for stimulus creation,printing,comparing,etc.3.2 Properties should is public by defaultMust is visible to contraints in other classes3.3 Properties should is Rand by defaultCan is turned off with Rand_modeClass transac

First, s3c2440 clock introductionThere are three kinds of clocks in s3c2440: FCLK,HCLK,PCLK.FCLK for CPU cores, HCLK for Devices on AHB (Advanced high performance bus) buses, such as CPU cores, memory controllers, interrupt controllers, LCD controllers, DMA and USB host modules, etc. PCLK is used for devices on the APB (Advanced peripheral bus) buses such as Watchdog, IIS, I²c, PWM timers, MMC interfaces, ADCs, UART, GPIO, RTC, and SPI. The s3c2440 ha

divider, the output for APB2 peripheral use (the maximum frequency of 72MHz), the other way to send a timer (timer) 1 time times the frequency of use; Specifically, the following table: APB Peripheral Content Table Name Type Peripheral content APB1 Low Speed peripherals Power Interface, backup interface, CAN, USB, i2c1, I2C2, UART2, UART3, etc. APB2 High-speed per

; /* 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 UPIO_MEM32 (3) #define UPIO_AU (4)/* au1x00 type IO */#define Upio_tsi (5)/* tsi108/109 type IO */#define UPIO_DWAPB (6)/

Directory Directory Problem description System Framework Overview Masters Slaves Frame diagram Memory overview Sram Flash Boot configuration How to configure Boot category Problem descriptionstm32f0308 is a CortexM0 architecture, and the System Framework section will be briefly described in detail in arm's CortexM0 related documen

(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