Yesterday I used a perfboard to solder a parallel port C8051 programmer according to the drawings provided in my previous post.I plugged it into my PC this morning, ran the programmer file (the attach...
Hello everyone. I studied analog electronics when I was a sophomore, but I didn't understand much at the time. I just took it to get by for the exam. Now I want to really understand it, but I don't kn...
[p=28, 2, left][color=rgb(51, 51, 51)][font=宋体][b]Capacitor[/b] is what we usually call a capacitor, and its function is to serve as a container for holding electricity. Capacitors are also one of the...
The ad is quite interesting, it is an ad with a puppy. [flash]http://player.youku.com/player.php/sid/XNTUzMjQzMTMy/v.swf[/flash] BeagleBoard.org announced the launch of the new generation product Beag...
[size=5]Normally, RET is used for return in ordinary assembly subroutines, and RETI is used for interrupt return in interrupt service subroutines. Both instructions can pop the breakpoint address from...
The most significant event in the technology circle during this period is undoubtedly the news that ZTE was banned by the United States. Once the news came out, it shocked the entire Chinese techno...[Details]
"Originally, there are many people who can design very good
chips
, but the market does not give domestic
chips
the opportunity to iterate, and domestic companies cannot give engine...[Details]
1. The first project We are going to create the first project, which is mainly for project analysis, so that we can understand how CubeMX works and how to trace the code logic. Okay, no more nonsense...[Details]
Regarding the PHY construction of LWIP, the PHY chip used is LAN8720A, RMII mode. Regarding the hardware connection part, the Atomic board F407 is used, and the hardware connection is as follows: ...[Details]
I used STM32CubeMX V4.22.1 to generate a project including EHT and Lwip. The debugging has been abnormal. After careful inspection, the following problems were found: 1. The hardware uses LAN8720A, b...[Details]
This routine is also a classic routine on the development board. I modified the framework of the program to make it more suitable for future calls. The specific 4*4 keyboard scanning principle is rel...[Details]
//Observe the difference between feeding the dog and not feeding the dog, and use the LED indicator of the PB port for status indication. //Switch the LED indicator enable switch of the PB po...[Details]
The analog watchdog of the ADC is used to check if the voltage is out of bounds. It has two upper and lower bounds, which can be set in the registers ADC_HTR and ADC_LTR respectively. The library fun...[Details]
OSC_IN and OSC_OUT are external crystal pins by default. If you do not use an external crystal oscillator on the STM32, how to connect OSC_IN and OSC_OUT If you use the internal RC oscillator instead...[Details]
Here is the temperature added in the previous chapter The above figure is the temperature calculation formula: where Vsense is the ADC value collected from the temperature channel. The stm32f407 ...[Details]
;The hardware connection circuit of the 51 single-chip microcomputer is as follows: ;P1.3 and P1.4 are each connected to a button; ;P0.0 and P0.3 are each connected to a light-emitting diode; ;P2.0~P...[Details]
I have been deeply affected by serial ports since 51. The MAX232 I bought from Huaqiang was originally broken. I thought there was something wrong with my circuit or schematic. Since there was no goo...[Details]
Pay attention to whether the new lock matches the old door Smart locks have many advantages over traditional mechanical locks. Although the domestic penetration rate is not high, with the strength...[Details]
"When the spring breeze blows, the horses gallop." This is
a true portrayal of the development of
NB-IoT
(Narrowband Internet of Things) in China and even the world in the past two years. Le...[Details]
DIY/Open Source Hardware
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