This example shows how to use the RSTC peripheral to indicate the cause of the device
reset.
Parent topic:Harmony 3 Peripheral Library Application Examples for SAMA5D2 Family
The Reset Controller collects the various reset sources and generates reset for the
device and allows the reset source to be identified by the software.
To clone or download this application from Github, go to the main page of this repository and then
click Clone button to clone this repository or download as zip file. This content
can also be downloaded using content manager by following these instructions.
Path of the application within the repository is
apps/rstc/rstc_reset_cause/firmware.
To build the application, refer to the following table and open the project using its
IDE.
Project Name | Description |
---|---|
sam_a5d2_curiosity.X | MPLABX project for SAMA5D29 Curiosity Development Board Kit |
To load the application binary onto the target device, we need to use at91bootstrap
loader. Refer to the at91bootstrap loader documentation for
details on how to configure, build and run bootstrap loader project and use it to
bootstrap the application binaries.
The following table shows the target hardware for the application projects.
Project Name | Description |
---|---|
sam_a5d2_curiosity.X | SAMA5D29 Curiosity Development Board Kit |
ADDITIONAL HARDWARE REQUIRED
SETTING UP THE SD CARD
SETTING UP THE BOARD
Build the application using its IDE
Copy the output binary (named ‘harmony.bin’) onto the SD Card (Refer to the ‘Setting up hardware’ section above for setting up the SD card)
Insert the SD card into SDMMC slot on the board (Refer to the ‘Setting up hardware’ section for the correct SDMMC slot)
Open the Terminal application (Ex.:Tera term) on the computer.
Connect to the EDBG/Jlink Virtual COM port and configure the serial settings as follows:
Reset the board to run the application
RGB LED toggles in green color and console displays the following message
Note: The cause for last reset will differ based on initial user action and is blanked out to avoid confusion.
Press Switch PB_USER to stop petting the watchdog
RGB LED to should start toggling in blue color and the console display should be updated as follows
After a few seconds board will reset and the demo will start again (RGB LED toggles in Green color)
Console shall display watchdog as the cause of reset
Note: Application and bootloader shares the same console . Since bootloader messages are not relevant to the application,they are not shown here.
Press Switch RESET to reset the board. Board will reset immediately and demo will start again (RGB LED toggles in Green color)
Console displays user as the cause of reset
Note: Push and release RESET switch very quickly so as to not end up cutting power to the PMIC triggering a power on reset (instead of just toggling of the reset pin).
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