Programmer Group

         In the development stage of an embedded product, the bootloader needs to be continuously downloaded to the memory. If the memory uses nand flash, but there is nothing in it for the first time, it can only be started in other ways according to the startup mode of the processor, such as SD card or ...

ESP-NOW introduction ESP-NOW is a protocol developed by Espressif, which allows multiple devices to communicate with each other without using Wi Fi. The protocol is similar to a low-power 2.4GHz wireless connection. Pairing between devices needs to be completed before communication. After pairing, the connection is secure, point-to-point, ...

preface There is a fish tank at home with several fish to play, but the problem of changing the water is really a headache. If you don't pay attention, you often forget to change the water, and the fish will disappear. o(╥﹏╥)o After obtaining Spirit 1 Edge computer After that, it is equivalent to having a personal intelligent device se ...

5. Routing messages In the previous example, we created and used a single actor, and an actor can only process one message at the same time, which does not give play to the advantages of akka parallel computing. We hope to process messages in parallel, just like kafka's consumer. This requires the use of routing to akka. Routing is the same a ...

1, Introduction to temperature and humidity module sensor DHT11 digital temperature and humidity sensor is a temperature and humidity composite sensor with calibrated digital signal output. It applies special digital module acquisition technology and temperature and humidity sensing technology to ensure that the product has high reliability an ...

1) Experimental platform: punctual atom alpha Linux development board 2) Platform purchase address: https://item.taobao.com/item.htm?id=603672744434 2) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-300792-1-1.html 3) Students interested in punctual atomic Linux can add group discussion: 93 ...

SDK framework based on sddc protocol_ sdk_ Lib parsing Previously, when porting libsddc library, I felt that the official demo was too inefficient (￣. ￣). I was tired of copying and pasting code, and wrote a BUG, and the other copied code cracked, so I wrote an sddc_sdk_lib library to make sddc access devices faster and more effective. This ...

1.FRESULT f_opendir(DIR *dp,const TCHAR *path); Function: Open a directory parameterfunctiondpA pointer to an empty directory object structure that stores directory information about to be openedpathRoute The return value FR_OK(0) indicates that the function was executed successfully and the directory object structure was created for subsequen ...

1. Management of interruptions Freertos manages system interrupts by manipulating BASEPRI registers, and the management priority is defined in the header file FreeRTOSConfig.h #define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY    5 Setting the maximum priority that FreeRTOS can manage does not belong to the FreeRTOS pipeline, and interrupt ...

DCB structure must be used when programming serial port with WIN32 API. First, first, the DCB structure typedef struct _DCB { DWORD DCBlength; DWORD BaudRate; DWORD fBinary: 1; DWORD fParity: 1; DWORD fOutxCtsFlow:1; DWORD fOutxDsrFlow:1; ...