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){uint32_t tmp = 0, pllmull = 0, pllsource = 0, presc = 0;/* Get SYSCLK source -------------------------------------------------------*/tmp = RCC->CFGR CFGR_SWS_Mask; switch (tmp){case 0x00:/* HSI used as system clock */RCC_Clocks->SYSCLK_Frequency = HSI_VALUE;break;case 0x04:/* HSE used as system clock */RCC_Clocks->SYSCLK_Frequency = HSE_VALUE;break;case 0x08:/* PLL used as system clock *//* Get PLL clock source and multiplication factor ----------

coefficient), SW (system clock switching ),At the beginning, the system clock is switched to Hsi, which serves as the initial clock of the system.. Macro stm32f10x_cl is a macro related to a specific stm32 chip. /* Reset HSEON, CSSON and PLLON bits */ RCC->CR = (uint32_t)0xFEF6FFFF; /* Reset HSEBYP bit */ RCC->CR = (uint32_t)0xFFFBFFFF; /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE/OTGFSPRE bits */ RCC->CFGR = (uint32_t)0xFF80FFFF; Which of th

Three graduation times A his hospital in Jinan The entire company is five people, there is no future, with petabytes of finished products. I have no experience. The manager asked me to stay there for three days. Then I took the test. The result was that I didn't know anything, and I left. I did not know what company I was working for in Jinan. I applied for a technical job, but when I went to the interview, they were looking for business personnel and faced with so many people, I know how

STM32 A total of five clock sources, namely: HSI is a high-speed internal clock, rc oscillator, the frequency of 8MHz; HSE is a high-speed external clock with a frequency range of 4~6mhz; (can connect quartz/ceramic resonator or external clock source) LSI is low speed internal clock, frequency 40kHz; (independent watchdog clock source, available as RTC Clock source) The LSE is a low-speed external clock with a frequency of 32.768k

The previous section details the system default clock configuration, and the number of clock output, which is the default configuration, but the actual use of the clock default clock does not meet the requirements, so you need to know how to call the library function to configure.The best information is to consult the STM32F2XX_RCC.C file, which has a variety of function functions, and has detailed comments, which let us such a novice to get started is very fast.//VCO = PLL input Clock (HSE or

The following definitions are from Gonzales-"Digital Image Processing"RGB color Model: The image consists of three component images, one component image per primary color. When fed into an RGB monitor, these three images are mixed on the screen to create a composite color image.HSI color model: RGB model of the color system is ideal for hardware implementation, and the human eye is strongly aware of red, green, blue, the fact that the three primary colors can be well matched. Unfortunately, the

IWDG reset 1, switch off the 1.2V voltage domain power loss; 2, internal SRAM and register content loss; 3,pll/hsi/hse closed; 4,iwdg/rtc/lsi/lse can be determined by the user whether to run; 5, voltage regulator off All Pin PlaceZ State, exceptReset and PC13,PI8 and PA0 . close backup before entering SRAM 4 Stop mode void Pwr_enterstopmode (uint32_t pwr_regulator, uint8_t pwr_stopentry) Arbitrary internal and

voidClk_init (void){Clk_ickr|=0x01;//Enable internal high-speed clock HSICLK_CKDIVR|=0x08;//16M internal RC via 2, System clock is 8M while(! (clk_ickr0x02));//hsi ready .Clk_swr=0xe1;//HSI Primary Clock source}voidINIT_TIM2 (void) {TIM2_CCMR3 |=0X70;//Set timer 23-channel (PD2) output compare three modesTIM2_CCMR3 |=0x04;//Output comparison 3 pre-load enableTim2_ccer2 |=0x03;//Channel 3 Enable, low activ

Reset:1. System Reset: A Systems Reset Sets all registers-their reset values except for the RTC, RTC BackupRegisters and Control/status Register, RCC_CSRReset Source view: RCC_CSROption byte loader:stm32l15xxx Flash Programming Manual (PM0062)2. Power RESET:A Power Reset sets all registers to their reset values including for the RTC domain3. RTC and Backup registers Reset:Reset Source: A software reset, triggered by setting the Rtcrst bit in the RCC_CSR registerPower Reset (BOR/POR/PDR)Clocks:Fe

processing methods that use Hue (H), saturation (S) intensity (I) to describe color. The HSI color model and the RGB color model conversion formula are as follows:Given an RGB image, convert to hisHere:The saturation level is as follows:Strength Component:Description: The angle is measured in red as the starting datum axis.His to RGB space conversion: Here HSI is the normalized value between [0,1].First, t

In stm32, there are four clock sources: Hsi, HSE, LSI, LSE, And a pll output 1,HSIIt is a high-speed internal clock, RC oscillator, and the frequency is 8 MHz. 2,HSEIt is a high-speed external clock, which can be connected to a Z/Ceramic Resonator or an external clock source. The frequency range is 4 MHz ~ 16 MHz. 3,LSIIt is a low-speed internal clock, RC oscillator, and the frequency is 40 kHz. 4,LSEIt is a Z crystal with a low-speed external clo

Stm32 has three different clock types used to drive the system clock (sysclk) (1) HSI (internal clock) (2) HSE (external clock, provided by excellent vibration) (3) PLL (PLL clock) The reuse configuration is as follows: Use HSE as the input source of the PLL, configure the PLL to 72 MHz, then use the PLL as the system clock, and finally configure other clocks as the system clock crossover output. Note: (1) When

processing methods that use Hue (H), saturation (S) intensity (I) to describe color. The HSI color model and the RGB color model conversion formula are as follows:Given an RGB image, convert to hisHere:The saturation level is as follows:Strength Component:Description: The angle is measured in red as the starting datum axis.His to RGB space conversion: Here HSI is the normalized value between [0,1]. First,

). The algorithm terminates. Therefore, Hs→i is not a redundant function dependency and cannot be removed from the F5. That is: F5={cs→g,c→t,th→i,hi→c,hs→i}③ remove each function in the F5 depends on the left superfluous attribute (check only the left is not a single property of the function dependency)There is no dependency on the function on the left that has extra attributes. Therefore, the minimum function dependency set is:F={cs→g,c→t,th→i,hi→c,hs→i}(b) Since all the properties in R appear

#if!defined (Hse_value)#define Hse_value ((uint32_t) 24000000U)/*!#endif/* Hse_value */ The size of the Hse_value value determines the period in which the clock ticks. The setting of this value does not affect the clock cycle of the main frequency and the changes of the associated timer. __weak uint32_t hal_rcc_getsysclockfreq (void){uint32_t pllm = 0U, Pllvco = 0U, PLLP = 0U;uint32_t sysclockfreq = 0U; /* Get SYSCLK Source-------------------------------------------------------*/Switch (RCC-GT

[email protected] ~]# Col [-XB] Options and Parameters:-x: Converts the TAB key to the equivalent space bar-B: Filter out all control characters, including RLF (Reverse line Feed) and HRF (Halt RLF)Example one: UsingCat-A shows all the special keys, and finally the [tab] is turned into blank with col [[email protected]~]#Cat-a/etc/Mans. config symbol of I, that is tab[[email protected]~]#Cat/etc/Mans. config | Col-x |Cat-A | More# Hey! As a result, the [tab] key will be replaced with a space bar

Image arithmetic Operations1. Image additionUse Cv2.add () to add two images, or you can use NUMPY,RES=IMG1+IMG2 directly. The size of two images, the type must be the same, or the second image can be a simple scalar value.The addition of OPENCV is a kind of saturation operation, while the addition of NumPy is a kind of modulo operation.The results of OPENCV will be better.import cv2import numpy as npx=np.uint8([250])y=np.uint8([10])print (x+y)print (cv2.add(x,y))[4][[255]]2. Image blendingThis

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. Often this requires a quantitative process that divides the color into a number of non-overlapping categories. Generally not directly in the RGB color space statistics, but after the brightness separation, the representative of the color portion of the information statistics, such as in HSI Space HS subspace, YUV space UV subspace, as well as other reflection of human visual characteristics of the color space representation. For example, the followi

** Compliant with RFC822. Thanks to Pao-Hsi Huang. **-Fixed bug; certain mail systems (gmx.net in particle) ** Were rejecting mail because of a space character either ** Side of the equal sign on the boundary line. Thanks ** Peter Holland for policying me. **-Fixed bug; $ html_images was tested to be an array or not ** But was set to be an array during object creation, so ** Test always returned true. Thanks to Bob Sil