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Cortex_m3_stm32 Embedded Learning Note (21): SPI Experiment (communication bus)

spi_flash_init (void) {Gpio_inittypedef GPI O_initstructure; Rcc_apb2periphclockcmd (Rcc_apb2periph_gpioa, ENABLE); Gpio_initstructure.gpio_pin = gpio_pin_2| gpio_pin_3| Gpio_pin_4; SPI CS gpio_initstructure.gpio_mode = gpio_mode_out_pp; Multiplexing push-pull output gpio_initstructure.gpio_speed=gpio_speed_50mhz; Gpio_init (Gpioa, gpio_initstructure); Gpio_setbits (gpioa,gpio_pin_2| gpio_pin_3| Gpio_pin_4); Spi1_init (); Initialize S

Concepts of gpio ports

1. What is gpio? The full name of gpio is general-purpose Io ports, that is, general input and output ports. In embedded systems, many simple external devices or Circuits need to be controlled. Some of these devices need to be controlled by the CPU, and some need the CPU to provide the input signal. In addition, as long as many devices or circuits require an on/off two shaped bodies, such as LED light and off. Traditional serial ports or parallel ports are complicated to control these devices. T

Transplantation of the embedded operating system ECOs on the s698 series Processor

related technologies in the aerospace, electronics, ships and other fields. Oubit (Zhuhai) Software Engineering Co., Ltd. is one of the few high-tech enterprises in China that can design, produce, develop embedded operating systems, dedicated chips and their high-end computer systems. This series of processors are widely used in China's industrial control, electronic information, special industries and other fields. S698-ECR processor is one of the s698 series processor produced by oubit (Zhuha

Oracle 10g physical volume uard configuration notes

= 1500*. Remote_login_passwordfile = 'clusive'*. Sessions = 1655*. Sga_max_size = 1073741824*. Sga_target = 1073741824*. Undo_management = 'auto'*. Undo_tablespace = 'undotbs1'*. User_dump_dest = '/oracle/ora10/admin/jscn/udump'### Add below parameter for standy database*. DB_UNIQUE_NAME = '10upli'*. Log_archive_config = 'dg _ CONFIG = (10 GPI, 10 gstandby )'*. Log_archive_dest_1 = 'location =/oraarch/VALID_FOR = (ALL_LOGFILES, ALL_ROLES) DB_UNIQUE_N

Use python to control gpio

/gpio/export", "W") fp1.write (STR (PINs) fp1.close () handle T ioerror: Print "GPI O % s already exists, so skipping export gpio "% (STR (PINs),) print" Warning: Make sure that C-binary to initialize gpio's is executed prior to this. the script may not work as intended if the ports are not initialized properly "+" \ n "for I in range (1, Len (sys. argv): export_pins (sys. argv [I]) Direction = raw_input ("Configure pin % s as output (1)/input (2 )?:

The simplest STM32 Getting started tutorial----flashing LEDs

not error. At this point, a STM32 project was established.Fifth Step , copy and paste the following code#define PERIPH_BASE ((unsigned int) 0x40000000) #define Apb2periph_base (periph_base + 0x10000) #define Gpioa _base (apb2periph_base + 0x0800) #define Gpiob_base (apb2periph_base + 0x0c00) #define Gpioc_base (Apb2periph_base + 0x1000) #define Gpiod_base (apb2periph_base + 0x1400) #define GPIOE_BASE (AP B2periph_base + 0x1800) #define Gpiof_base (apb2periph_base + 0x1c00) #define GP

Python crawler crawl Proxy IP

(sheetname=currenttime) sheet.write (0, 0,"IP Address") sheet.write (0,1,"Port") sheet.write (0,2,"Server Address") sheet.write (0,3,"Anonymous") sheet.write (0,4,"type") sheet.write (0,5,"Date") #Initialize _num to 1_num=1#start at the beginning of the initialization positionindex =0 while(is_over):#temp is used to record whether the proxy IP is the same day, if it is not recorded in its locationTemp=-1URL1=url.format (num=_num) HTML=GPI. Gethtml

Android Deep Explore (Vol. 1) Hal with Driver Development Nineth Chapter reading notes

This chapter focuses on the hardware abstraction layer:HAL. Hal is built on Linux Drive A set of libraries,Google for Android to join HAL mainly for the purpose of the following. 1. Calling interface for unified hardware2. Fixed the issue of GPI copyright 3. For a number of special requirementsIn the LED driver, we joined HAL to use the program does not need to care about the Linux driver and device files interactive way. To write a Linux driver th

Hai Lotus apt Organization latest attack Sample Analysis _ Fishing

Enterprise network access situation, to protect the enterprise network security. 0x6 Appendix (IOCs) Hash: 02ae075da4fb2a6d38ce06f8f40e397e (DOCUMENT_GPI Invitation-unsooc China.doc) D7C172D4A88573B7E373F2B666C011AC (GPI Invitation-unsooc China.doc) 72a5ad375401f33a5079caee18884c9d ({92ba1818-0119-4f79-874e-e3bf79c355b8}.dll) 79D06DD20768FD8CD4A043833C1F2D4B ({a96b020f-0000-466f-a96d-a91bbf8eac96}.dll) \ EC505565E4CB5A22BFD3F63E4AD83FF3 (HttpProv.dll

Use timer to control LED light flashing

in table 1.2. Table 1.2 Output Type settings Ot[0] Description B0 push-Pull output (initial value) B1 Open-Drain output 1.3 Output Speed setting Table 1.3 Port Output Speed settings OSPEEDER[1:0] Description B00 2MHZ Low Speed B01 25MHZ Medium speed B10 50MHZ Fast B11 100MHZ High Speed 1.4 Pull-up drop-down resistor settings Table 1.4 Pull-up drop-down resistor settings PUPDR[1:0] Description B00 no pull-up or pull-down resistor B01 pull-up resistor connection B10 pull-down resistor connectio

STM32 Interrupt System

优先级 */ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; /* 使能中断通道 */ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(NVIC_InitStructure); //将上述配置参数传入中断初始化函数} In addition to the configuration of the interrupt line, we also configure the corresponding PIN void Exti_key_config (void) {gpio_inittypedef gpio_initstructure; Exti_inittypedef exti_initstructure; /* Turn on the key gpio port clock */Rcc_apb2periphclockcmd (rcc_apb2periph_gpioa|

Link analysis algorithm: Salsa algorithm

is a browser, from a subset of random selection of a node (for the convenience of explanation, shown in the figure from the hub subsets of Node 1, the actual calculation is often from a subset of authority), if the node contains multiple edges, then the probability of a random edge of equal probabilities, Jumps from the hub subset to the nodes in the Authority collection, as shown in the figure is transferred from Node 1 to Node 3, and then jumps back from the authority subset to the subset of

R Language Neural Network algorithm

deviceThe Perceptron is equivalent to a single layer of a neural network, consisting of a linear combination and an original binary threshold value:A single-layer perceptron that forms the Ann system:The perceptron computes a linear combination of these inputs with a real value vector, and outputs 1 if the result is greater than a certain threshold, otherwise the output ‐1.The Perceptron function can be written as: sign (w*x) can sometimes be added to the bias B, written as "W*x+b"Learning a pe

Stanford cs231n 2017 newest Course: Li Feifei Detailed framework realization and comparison of depth learning

gradient loss for W1 and W2; There is still no computational process--just to create graphics. B. Run Now that you have completed the steps to create the graphic, we go to the part of the graph that is being calculated. Creates a numpy array, which will be filled in the upper placeholder. To perform an operation on a graph: input x, Y, W1, W2 into the NumPy array, and a w1 array of losses (loss), W2 gradients, and numpy gradients. Training Network: Repeatedly on the graph operation, using g

Deep Learning paper notes (IV.) The derivation and implementation of CNN convolution neural network

series (vii)[2] LeNet-5, convolutional neural networks[3] convolutional neural networks[4] Neural Network for recognition of handwritten Digits[5] Deep learning: 38 (Stacked CNN Brief introduction)[6] gradient-based Learning applied to document recognition.[7] Imagenet classification with deep convolutional neural networks.[8] "convolution feature extraction" and "pooling" in UFLDL.In addition, here is a matlab deep learning toolbox, which contains the CNN code, in the next blog post, I will be

Deep Learning (depth learning) Learning Notes finishing Series (vii)

convolutional neural networkconvolutional neural network is a kind of artificial neural network, which has become the research hotspot in the field of speech analysis and image recognition. Its weight-sharing network structure makes it more similar to the biological neural network, reduces the complexity of the network model and reduces the number of weights. This advantage is more obvious when the input of the network is multidimensional image, so t

POJ2142 (Extended Euclid)

The Balance Time Limit: 5000MS Memory Limit: 65536K Total Submissions: 5991 Accepted: 2605 DescriptionMs. Iyo Kiffa-australis have a balance and only kinds of weights to measure a dose of medicine. For example, to measure 200mg of aspirin using 300mg weights and 700mg weights, she can put one 700mg w

Cvboostnextweakclassifier (translation)

The original text reads as follows:/* * Cvboostnextweakclassifier * * The Cvboostnextweakclassifier function performs next training * Iteration and Caluclate s response values and weights for the next weak * classifier training. * * Parameters * weakevalvals * Vector of values obtained by evaluation for each sample with * The last trained W Eak Classifier (Iteration i). Must be of CV_32FC1 type. * Trainclasses * Vector of classes of training samples.

Brief discussion on data structure-shortest path

9 2. Algorithm analysisBased on the above analysis, you learn that you need to create two arrays, create a collection of vertices, and a collection of edges to hold the weights of the points to each edge, then select the vertices of the smallest weighted edge pairs in the weights collection, and then continue the loop. Create vertices in conjunction with Nnodein

Machine learning--linear regression and gradient algorithm

o'clock, the linear model Y = * X is better fitting with the sample data.So when the number of items X = 6 o'clock, we can roughly estimate the total price y = 20 * 6 = 120Multivariate regression:A linear regression greater than an independent variable is called multivariate regression.The above example is just a self-variable, which is easier to handle, but if there are many independent variables, it is assumed that the arguments are M, [X1,X2,X3,X4.....XM].At this point we assume that the reg

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