MCU download files: the difference between HEX files and BIN files-EEWORLD

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After the MCU program is written, we have to download the program to the MCU memory, so that the MCU can execute commands according to the programmer's logic to realize the function. We have talked about several ways to download MCU before, such as ISP download and JTAG download. The most common format of the download file is hex file, which everyone knows. There is also a bin file which is the download file of the MCU. The following introduces the difference between these two formats.

HEX files and BIN files are two file formats we often encounter. Here is a brief introduction to the differences between these two file formats:

1. The hex file contains address information. When burning the program in ISP mode, we all have the following experience: 1) Select the microcontroller model; 2) Select the serial port number; 3) Set the baud rate (or default); 4) Select the file to download; 5) Click the download button to download. As shown in the figure below.

MCU download files: the difference between HEX files and BIN files [Reprinted]

After these steps, the program download is completed. In the above steps, we did not choose which memory of the microcontroller to download the program to, that is, there is no need to set the address. Because the information inside the HEX file already includes the address. When burning the BIN file, the user must specify the address information. The microcontroller downloads more hex files.

2. The BIN file format only includes the data itself, not the address

The bin file itself is just data and does not contain address information, so when downloading the bin file, you need to select the starting address and ending address of the memory, that is, download the bin file to the specified memory space. Usually, the chips that need to specify the program memory address are ARM chips and DSP chips.

3. The sizes of HEX files and BIN files are different

For bin files, the file size you see by right-clicking the file properties is the actual size of the data. For HEX files, the file size you see is not the actual size of the data. One reason is that HEX files use ASCII to represent data, and the other is that HEX files themselves include other additional information.

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