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Several version numbers of ARM ARM kernel version number: ARMv7 ARM SoC version number: Cortex-A8 Chip model: S5PV210 The developmen...[Details]

source code: #include reg51.h #define LEDCHAR P1 #define LEDSELECT P0 #define TIME0H 0xFC #define TIME0L 0x18 #define TIME1H 0x40 #define TIME1L 0x98...[Details]

1. Clock initialization 1.1 Clock initialization analysis 1) Crystal oscillator frequency 2) How many PLLs are there? 3) Which clocks will the PLL generate? 4) What is the ...[Details]

1. The role of the BSS segment Initialized global variables are stored in the data segment; Local variables are stored on the stack; malloc is stored in the heap; Uninitialized ...[Details]

Usually the development board comes with a key interrupt driver, and the interrupt has been registered to the kernel. Recompile the Linux kernel to remove the built-in driver before you can use you...[Details]

A previous blog briefly introduced the platform device driver model (http://www.cnblogs.com/ape-ming/p/5107641.html). Now, based on the template listed in that blog, we will modify the example in t...[Details]

1: Clock domain of s5pv210 MSYS Domain: Provides clocks for processor, 3D, intc (interrupt), DMC0, DMC1, IRAM, IROM, HCLK_MSYS: 200MHZ, PCLK_MSYS: 100MHz DSYS Domain: Provides clocks for ...[Details]

Use rpm -qa | grep nfs to check whether the tftp server is installed yum  install nfs 1. Server installation: 1.setup 2.System Services 3. Check *nfs 4.service nfs res...[Details]

From the previous uboot code analysis, we know that the uboot startup has three steps: BL0, BL1, and BL2. Since BL0 is a fixed program provided by the manufacturer, it does not need to be considere...[Details]

The mechanism for masking interrupts in the 210 is the same as that in the 6410. Moreover, both are vectored interrupts, and many interrupts are implemented in hardware, unlike the 2440. But t...[Details]

Colleges and universities are units with many departments and divisions, and there are many school activities. The activities of answering questions are exciting and interesting. There are few answer...[Details]

The operation mode of this ADC module is actually quite simple. The first thing is configuration. Let’s list what to configure. ADICLK ADC module input clock selection. Bus clock, bus clock divid...[Details]

Introduction: Here is a simple method for high-precision ultra-low frequency measurement of rotation speed without using an external counter. That is, the T0 counter inside the AT89C2051 microcontrol...[Details]

Introduction: In order to solve the communication problem between 51 single-chip microcomputer and computer serial bus (USB), based on PDIUSB12 chip, STC89C52 in 51 single-chip microcomputer is selec...[Details]

Introduction: The triple bus is referred to as ADC, which always reminds me of the ADC chip. A is the address bus, D is the data bus, and C is the control bus, which controls the off-chip ROM, RAM an...[Details]