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patches from )) #3 Tue Aug 9 18:57:29 CST 2005Processor: Atmel AT91M40xxx revision 0Architecture: EB01On node 0 totalpages: 1024Zone (0): 0 pages.Zone (1): 1024 pages.Zone (2): 0 pages.Kernel command line: root =/dev/rom0Calibrating delay loop... 15.82 BogoMIPSMemory: 4 MB = 4 MB totalMemory: 2916KB available (903 K code, 178 K data, 40 K init)Dentry cache hash table entries: 512 (order: 0, 4096 bytes)Inode cache hash table entries: 512 (order: 0, 4096 bytes)Mount cache hash table entries: 512

4.3.1 The mpll generates the master clock, and the upll Master/Slave USB function clock Bank6 and bank7 must be in the same size. 4.3.2 Special Function registers Special Function registers start from 0x4800 0000 Http://blogold.chinaunix.net/u2/78338/showart_1165864.html There are two PLL (Phase Locked Loop, phase-locked loop, which is learned at high frequency, which can achieve frequency doubling. The high frequency of S3C2410 is produced by this circuit ). One of them is m

prefetch buffer */ SetSysClock();#ifdef VECT_TAB_SRAM SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */#else SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */#endif } From the function description, this function isInitialize the internal falsh, PLL, and update the system clock.. This function must be called After resetting and starting. RCC->CR |= (uint32_t)0x00000001; First line of codeOperate the clock control

= (uint32_t) (uint32_t )~ Flash_acr_latency ); Flash-> ACR | = (uint32_t) flash_acr_latency_2; /* Hclk = sysclk */ RCC-> cfgr | = (uint32_t) rcc_cfgr_hpre_div1; // hclk equals to the system clock /* Pclk2 = hclk */ RCC-> cfgr | = (uint32_t) rcc_cfgr_ppre2_div1; // APB pre-division is hclk /* Pclk1 = hclk */ RCC-> cfgr | = (uint32_t) rcc_cfgr_ppre1_div2; // The pre-division of APB high and low speed i

divides the clock signal (such as HSE) by frequency division or frequency doubling (PLL) to obtain the system clock. The system clock is divided by frequency to generate the clock used by the peripherals;RCC setting process: 1. Reset the RCC register to the default rcc_deinit value. 2. Enable the external high-speed clock crystal oscillator HSE rcc_hseconfig (rcc_hse_on) 3. Wait for the external high-speed clock crystal oscillator to work hsestartupstatus = rcc_waitforhsestartup (); 4. Set the

--------------- By nasiryReprinted, please describe the source and notify me USB device configuration status of the original driverEnd Point1. ep0 ControlMax packet SIZE-8BYTEAuto clear2. EP1 ControlMax packet SIZE-64BYTEMode = in;Transmode = Bulk3. EP4 ControlMax packet SIZE-64BYTEMode = outTransmode = BulkTransfer counter = buffer sizeUnit conuter = 1 byteDMA write (out)Enable DMA modeDisable demand modeDMA read disable (in) 4. ep3.ep2 is not used dma3 configuration 1. use dma3 for bulk

The Advan CED high-performance bus High performance bus is applied to high performance, high clock frequency system modules, which constitute a high performance system backbone bus. ASB The advanced System Bus System bus is the first-generation AMBA system bus, which has a smaller data width than AHB and supports typical data widths of 8-bit, 16-bit, 32-bit. APB Th

Additional experience: 1. I defined a APB, and then the property is PJHM (p uppercase). When I access through the APB.PJHM, I do not get the data, need APB.PJHM to get Apbprocessor.query (Ticketno,function (APB) { alert (APB.PJHM); }); 1. about passing multiple parameters such as a Java function public boolean del (String spjmc,string SPJHM), how to invoke it with DWR. Var pjmc,pjhm .... Assignment Glpjzt

(); /* User code BEGIN 2 */* User Code END 2 */* Infinite loop */* user code begin while */while (1) {/* USER CODE END while *///Hal_uart_transmit (huart1, (uint8_t *) "33\n", 3, 100); Hal_delay (50); /* USER CODE BEGIN 3 */hal_uart_receive_it (huart1,uart_rx_buffer,4); Hal_delay (50); }/* USER CODE END 3 */}/** System Clock Configuration */void Systemclock_config (void) {Rcc_oscinittypedef rcc_ Oscinitstruct; Rcc_clkinittypedef rcc_clkinitstruct; /**initializes the CPU, AHB a

Data_width_8bit:ulcon0 |= 0x03;break; } ULCON0 = ~0x4; Clear Stop bit if (stop = = stop_bit1) {ULCON0 |= 0x4; }//Configure baud rate//HCLK gives all devices mounted on the AHB bus using//PCLK to all devices hung on the APB bus using//UART0123 on APB//Div_val = (PCLK/(b PS x))-1 = (66000000/(115200x16))-1 = 34.807//div_val = 34.807 UBRDIV0 = (int) ((66000000/ (bps * 16)) -1);

IntroductionThe AXI protocol is probably a protocol that we often encounter in our usual circuit design, and it's a good deal, and we'll be familiar with this section.At first glance, the AXI protocol signals are numerous, dazzling and easy to Fameng. But in fact its basic idea is very simple. Just grasp the following points:1,valid/ready protocolThe Axi protocol is a typical bus protocol based on the Valid/ready protocol.The advantage of the Valid/ready protocol is that the relative independenc

1. OverviewThe s3c6410x memory subsystem consists of 7 memory controllers, a Srom controller, two A Onenand controller, a NAND flash controller, a CF controller, a DRAM controller. Static memory controller, Onenand controller, NAND controller and CF controller via EBI Common memory port 0.Note) 6410X PoP A type doesn ' t support NAND Flash. Don ' t care the description regarding NAND Flash.6410X PoP D type doesn ' t support Onenand Flash. Don ' t care the description regarding Onenand Flash.2. I

. The at75c220 contains 2 different bus ASB and APB,ASB for connectionArm Core, DSP core module, and the APB bus connects serial communication interface, general I/O port, and so on, between the two buses with Amba Bus bridge connection.ARMTTDMI microprocessor is a high-performance embedded CPU, low power consumption, fast operation, including thumb decoder,

diagram)There may be differences between the clock trees on STM32 for different series of chips. F0, F1 and F3 series chips (the mainstream chip, the frequency is relatively low) there are many similarities, F2 and F4 (high-performance chip) series of chips have many similar places. However, there is a big difference between the clock trees of the F3 chip and the F4 chip, as detailed in the reference manual, RCC-related chapters.The STM32 clock Controller provides a high degree of flexibility f

First, background:Recently, a project has been taken over, the core chip is both the LPC17XX series MCU, core arm of the COTEX-M3 core.If you want to play with an MCU, you have to take care of its clock!The clock is to the MCU, like the human heart. It gives the AHB, APB Bus The blood (clock frequency), and the devices that hang on the AHB (Advance High bus) bus are like our various organs, the peripherals that hang on the

MIPI DSI and D-PHY Initialization Sequence -- A- inShenzhen Nanshan Ping Shan Village Zengjianfeng Reference Document: I. mx 6Dual/6Quad Multimedia Applications Processor Reference Manual43.4Programming43.4.1DSI and D-PHY Initialization Sequence43.4.1DSI and D-PHY Initialization Sequence This chapter describes the procedure forDSI and d-phy initialization. This process isBased on APB RegisterInterfaceaccess. This chapter describes the DSi and D-the pr

read the book. The directory provides a basic overview of some information. (Figure 2-1) Generally, introduction is very short and has no content. skip this step. Description, Here is (2-2 ). Next let's take a look at the description: (Figure 2-2) We can get the following basic information: 1. The frequency reaches 72 MHz, and the flash memory in the chip is 128 K and sram20k. 2. Two APB buses (clock) 3. Two 12-bit ADCs are generally carried by MCU,

1. DMA meaning: Direct Memory acess, which can exchange data between high-speed and I/O devices and memory without the control of the CPU.2. S3C2410A supports 4-channel DMA and can be run in the following four cases① Both the source device and target are on the system bus AHB. ② Both the source device and target are on the peripheral bus APB. ③ The source device is on the system bus, and the target device is on the peripheral bus. ④ The source device

Dynamically create a message window and display a progress bar in the window. Select a button within the progress bar. Unit unit1; Interface UsesWindows, messages, sysutils, variants, classes, graphics, controls, forms,Dialogs, extctrls, stdctrls, comctrls; TypeTform1 = Class (tform)Button1: tbutton;Procedure button1click (Sender: tobject );Procedure dialogtimer (Sender: tobject );Private{Private Declarations}Public{Public declarations}End; VaRForm1: tform1; Implementation {$ R *. DFM} Procedure

following format:Typedef void (* s3c2410_dma_cbfn_t) (struct s3c2410_dma_chan *,Void * Buf, int size,Enum s3c2410_dma_buffresult result );The Buf can transmit some useful data. In the uda1314 driver, the audio_buf_t struct is passed. IV:Int s3c2410_dma_setflags (dmach_t channel, unsigned int flags) In driver 1314,Flags = s3c2410_dmaf_autostart;S3c2410_dma_setflags (Channel, flags ); V:int s3c2410_dma_devconfig(int channel, enum s3c2410_dmasrc source, int hwcfg, unsigned