What is the end of a .bin file? How to change the file size?

z45217

What is the end of a .bin file? How to change the file size? [Copy link]

The microcontroller mounts the file system. The following two instructions can get the number of file bytes to be 1024. What should I do if I want to change it to 1000?

fseek(f,0,SEEK_END); //Move the pointer to the end

size = (uint16_t)ftell(f); //Get pointer offset

I have a device that sends bin file contents when connected to the Internet. I want to subtract the size of each part I send to prevent a sudden network disconnection and repeated sending next time I connect to the Internet.

Thank you, everyone, please help

wangerxian

Create a new bin file and copy 1000 bytes of the original bin file's contents to it.

tagetage

Use hexadecimal editing software such as HexEditor.

吾妻思萌

bin is compiled and it is not recommended to modify it directly~

z45217

Azuma Simeng published on 2023-2-23 07:56 bin is compiled and it is not recommended to modify it directly~

This bin file is also created by me in the program. It is used to store sensor data when the network is disconnected, because there are a lot of 0x00 and FF, which are not suitable for TXT storage.

freebsder

Binary editors can have a look.

吾妻思萌

Azuma Simeng published on 2023-2-23 07:56 bin is compiled and it is not recommended to modify it directly~

This bin file is also newly created by me in the program~ It is used to store sensor data when the network is disconnected, because there are a lot of 0x00 and FF, which is not suitable for TXT storage

Oh, then the magic tool ultraedit is very useful ~ the functions are extremely powerful