The CRC checksum needs to be contained in the last location of the section which the CRCSCAN is configured to check. This means that a CRC checksum needs to be calculated for an application using CRCSCAN, and added at the end, before the application is programmed to the device.
In this application note, the srec_input is the tool used to generate the checksum and add it to the end of the hex file. This is done through Atmel Studio, where srec_input is added as a post-build command for the project, and the end result will be a hex file which will contain the application code and its CRC checksum:
- 1.Open the project properties by
clicking Project → <project_name> Properties, as shown in the
figure below.Figure 1. Project Properties in Atmel Studio
- 2.Add a post-build command to the
project under Build Events → Post-build event command line, as shown in
the figure below.Figure 2. Post-Build Command in Atmel Studio
- 3.Rebuild the project by clicking Build → Rebuild <project_name>.