I want to display temperature and humidity, and alarm when the temperature is greater than 28. Now the temperature and humidity cannot be displayed. Please help me find out what's going on. Thank you/...
I have been trying to adjust LPC2138CS5530 for more than a week, but it doesn't work. All I get back is 0xFF, what's going on? ? Does anyone have an example of how LPC2138 can communicate with CS5530 ...
[size=4][color=#0000ff]I just got to work at the company. Today I received a series of calls from couriers asking me to pick up the parcels. I thought about it and didn’t buy anything. . . When I got ...
There are two ways for the LPS22HB pressure sensor to determine whether the data is ready after starting the conversion. One is to read the STATUS (27h) register to determine whether T_DA and P_DA are...
I want to use the arm board to send AT commands to MC8630 (3g communication module), and plan to use the serial port, but I don't know how to do it specifically. Please give me some advice!...
On April 20, the Photovoltaic Summit, guided by Jiangsu Renewable Energy Industry Association, hosted by Growatt, and supported by LONGi Solar Technology Co., Ltd. and Jiangsu Bigo New Energy Group...[Details]
1. Principle 1. Infrared emission protocol There are many infrared communication protocols. This experiment uses the NEC protocol. This protocol uses PWM modulation and uses pulse width to represen...[Details]
1. Usage scenarios In the first case, when using a common STM32 delay function, similar to HAL_Delay(time), since this function uses a loop to judge and delay, when executing this function, the ent...[Details]
Today, under the guidance of a low-level expert, I learned how to configure the PWM module! Woof! First open the file configured last time, as follows: Then, we need to use TIM1 to set PWM: Then,...[Details]
LAN8720 configuration: IP: 192.168.192.30 Gateway: 192.168.192.1 A high frequency of ARP packets is detected The content of the packet asks for the mac address of 192.168.192.1, and asks the resp...[Details]
Since China began to try to produce panels independently in 1998, in 2018, China's panel industry has gradually upgraded from a marginal industry to the largest production scale. Especially in the ...[Details]
Superconductors have physical properties such as zero resistance effect, Meissner effect and Josephson effect, which make them have broad application prospects and unparalleled advantages in many b...[Details]
I rewrote the main part of this program. The program uses the watchdog as a normal timer and scans the digital tubes in the watchdog interrupt. In addition, I added a display buffer. If you want to d...[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]
China Energy Storage Network News:
On the 7th, Jurong Economic Development Zone signed a strategic cooperation framework agreement on comprehensive energy services with State Grid Jiangsu Int...[Details]
The implementation of CAN driver under embedded operating system Android requires not only adding CAN driver device in Linux kernel, but also implementing the call of Android HAL layer. Taking S5...[Details]
I used the bit definition in my 51 program: bit flag. After defining it this way, I ran the program and downloaded it to the circuit board. I found that the flag was not the value I set, which led to...[Details]
The independent watchdog of STM32 is driven by a dedicated internal 40Khz low-speed clock, that is, it is still effective even if the main clock fails. Here we need to note that the clock of the inde...[Details]
The Vatican Secret Archives is one of the world's greatest historical collections, but many of its documents have never been transcribed. Recently, a project called Codice Ratio used a
combination...[Details]
RF/Wirelessly
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