I am using sqlite database, how to query by time or keyword, is it possible? I am using evc. I have been searching for a long time, maybe the method is wrong, I didn't find what I want, I have been st...
There are two button switches, and their functions are as follows. One is automatic control mode, and the other is manual control mode. The functions of manual control mode have been realized, but the...
For products with USB, you can burn a USB to NAND program to it first, and then copy the files into it through the computer. But for products without USB, and it has an external NAND, how to copy data...
I encountered a very strange problem. The following formula is calculated by Matlab and EXCEL with the same and correct results.
Using MCU and csharp test is another result
-(2*L^4*b - L^4*c + 8*L^2*b...
Can you help me see if this resistor array is reasonable? The resistor array is connected to port p0 as a pull-up resistor and leg 1 is connected to the power supply. Then can the holes of the dot mat...
Dong Yang, executive vice president of the China Association of Automobile Manufacturers, said on the 26th that according to the authorization of the Ministry of Industry and Information Technology...[Details]
Using Systick timer to achieve delay 1. SysTick timer characteristics The SysTick timer is a 24-bit down counter, that is, when vlue is decremented to 0, an interrupt is triggered and the load va...[Details]
On May 8,
Google
I/O 2018 Developer Conference was held as scheduled in Mountain View, California. In the second year of the full promotion of the "AI first" strategy, artificial intelligen...[Details]
If you do not use an external crystal on the STM32, the connection method of OSC_IN and OSC_OUT If you use the internal RC oscillator instead of an external crystal, please follow the following metho...[Details]
The clock system of STM32 can be directly summarized in a diagram (from the STM32F10X reference manual). The following is an analysis of this diagram 1. STM32 input clock source 1.1 Function of cl...[Details]
The single-chip microcomputer running light program requires all 32 serial ports to be used, and each serial port has eight LEDs. Question supplement: The 8051 single-chip microcomputer is used, an...[Details]
A simple experimental programming question for the microcontroller: write a 3-byte binary addition subroutine. The program entry is: addend 1: 22H, 21H, 20H three bytes, 22H is the highest bit; adden...[Details]
After three years of continuous decline in its mobile phone business, ZTE has finally revealed its true feelings to the outside world: the Chinese market is its weak point, and it is planning to f...[Details]
The chip is EM78P153 ; P64, P65 are connected to the crystal oscillator, the oscillation mode is 4MHz crystal oscillator ; the watchdog is off, the instruction cycle is 2 CLOCK, and P63 is the rese...[Details]
1. Question: Should I choose AT89C51 or 89S51 when learning 51 series microcontrollers ? Answer: 89C51 and 89S51 have the same core. 89S51 has several obvious upgrades over 89C51 as follows: ...[Details]
Core Tips: Photovoltaic people, Xiao Gu is calling you to inspect the inverter! Hello everyone, long time no see. As autumn and winter are coming, how to properly maintain our photovoltaic power st...[Details]
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