apb desk

sneaked back to the Shadow, Oliver took a deep breath and lowered his eyes. A few minutes later, everything was done. Oliver shut down his laptop and quickly left the wet basement, but it felt worse than when he entered. The next morning, Roy -- G. wizkins's QA leader was pouring coffee to himself, and he looked at the room ocean occupied by business analysts and other members of his QA Team. It's usually very quiet on Tuesday morning, Roy liked it. Suddenly, the silence was interrupted by a s

Some students have a heavy learning burden, so they are eager to stay up late at night. Some even study in the dormitory and learn late at night. Some cannot sleep on time, chatting with students in the dormitory. As a result, you cannot get up on time in the morning. Even if you barely get up, your mind is also gloomy. You cannot get up all day long, and some even go to bed at the desk in the classroom. As a student, the main learning task should be

last one at work, or do not make the first one at work. No matter what the cause is, being late or waiting for others is a bad habit. Therefore, you will be considered a person who does not speak principles or is not trustworthy. We recommend that you always go to work 15 minutes in advance to do some cleaning or preparation work. When you get off work, you have to wait for your boss or colleagues to give directions to clean up your desk, finish your

programsModule: appwiz. CPLCommand: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 1Result: installation/uninstallation is displayed. Command: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 1Result: installation/uninstallation is displayed. Command: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 2Result: Windows Installation is displayed. Command: rundll32.exe shell32.dll, control_rundll appwiz. CPL, 3Result: The boot disk is displayed. Copy DiskModule: diskcopy. dllCommand

The three-level flow organization in arm: Take the pointer --> decoding --> execute the five-level flow organization in arm: --> decoding --> execution --> buffer \ data --> interface for writing back arm memory and its hierarchy: the data types supported by the basic arm that MMU implements virtual memory management: 8, 16, 32-Bit Signed numbers and unsigned numbers are aligned in two or four bytes. 8-bit: signed charunsigned char 16-bit: shortunsigned short 32-bit: intunsigned int Arm me

, there is also the concept of sub-Interrupt. Some interruptions (such as uart1 2) are first handled by the sub-interrupt shielding register. here we need to block all sub-interrupts. For our board 2440, you can make a slight modification and add a macro to judge it. # If defined (config_s3c2410)LDR R1, = 0x3ffLDR r0, = intsubmskSTR R1, [R0]# Endif Set the clock frequency Register as follows: According to the notes, we can see that this Code sets the fclk hclk pclk frequency ratio, fclk is used

tim3_irqhandler (void)28 {29 tim_clearitpendingbit (tim3, tim_it_cc3 );30 ic2value = tim_getcapture2 (tim3 );31 if (ic2value! = 0)32 {33 dutycyle = (tim_getcapture1 (tim3) * 100)/ic2value;34 frequency = 72000000/ic2value;35}36 else37 {38 dutycycle = 0;39 frequency = 0;40}4142}4344 Note (1): If you want to change the measurement's PWM frequency range, you can divide the TIM clock frequency.4546 tim_timebasestructure.tim_period = 0 xFFFF; // period 0 ~ FFFF47 tim_timebasestructure.tim_prescaler =

S3C2440 clock C code about clock in ads1.2:Changempllvalue (mpll_val> 12) 0xff, (mpll_val> 4) 0x3f, mpll_val 3 ); Changeclockdivider (Key, 12 ); 1) Relationship between flck, hclk and pclkThe S3C2440 has three clock types: flck, hclk, and pclk. According to the S3C2440 official manual: fclk is used by ARM920T,Hclk is used for AHB Bus, which is used by the ARM920T, the memory controller, the interrupt controller, the LCD controller, the DMA and USB Host block. that is, the bus clock, includin

. After the external request signal passes through the 3 or door, it enters the 5 depressed. This is similar to the door which acts on the 4, it is used to introduce the control of event shielding registers. The pulse generator converts a hop-to-hop signal to a single pulse and outputs other functions to the chip, From this figure, we can see that there is no difference between the interrupt and the event from the external incentive signal, but it is separated within the chip. One signal will ge

such as iic and watchdog through the APB bus. 3.2 memoryMemory, also known as the main Memory, is divided into four major areas: the starting image area, the internal Memory area, the static Memory area, and the dynamic Memory area. The physical address of the starting image area is 0x00000000 ~ 0x07ffffff, 128 MB in total. The role of this region is used to start the system, as described in its name. However, there is no actual storage medium corres

. createproducta ();Abstractproductb APB = AF. createproductb ();Abstract Factory, applicable to a set of product series, that is, it is easy to add a product-as long as three classes of producta3, productb3, and concretefactoryare added at the same time; it is not easy to add a method to operate ACTC-you can use the decorator mode to complete this function. You can think about it using DB: A simple factory must generate a subclass for each database,

By default, the operating frequency of the S3C2410 CPU is 12 MHz. The PLL circuit can generate a higher clock speed for the CPU and peripheral devices. The S3C2410 has two PLL: mpll and upll, which are dedicated to upll and USB devices. Mpll is used for CPU and other peripheral devices. Mpll generates three clock frequencies: fclk, hclk, and Plck. Fclk is used for CPU cores, hclk is used for AHB Bus devices (such as SDRAM), and pclk is used for APB

1. Set the $D, e$ is $\triangle{abc}$ side $BC $ two, and $BD = ec$, $\angle{bad} = \angle{eac}$. Verification: $\triangle{abc}$ is isosceles triangle. RussiaHINT:by $BD = ec$ and collinear, considering panning $\triangle{abd}$ to $\triangle{fec}$, you get $ABEF $ is parallelogram and $A, E, C, f$ four points round $\rightarrow \angle{ace} = \angle{afe} = \angle{abd}$.2. Set $P $ is parallelogram $ABCD $ within any point, and $\ANGLE{APB} + \ANGLE{CPD

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