1.3 MPU CAN Bootloader

This example application shows how to use the Harmony Bootloader to bootload an application from SD/eMMC/NAND/Serial Flash memory and receives new application image using CAN-FD protocol and write it to SD/eMMC/NAND/Serial Flash memory.

Bootloader Application

• This is a bootloader application which resides from:
  • Bootloader stored into SD/eMMC/NAND/Serial Flash memory
  • Bootloader executes from DDR memory. AT91Bootstrap loads bootloader from SD/eMMC/NAND/Serial Flash memory to DDR memory and executes it.
• It uses CAN peripheral library in Non-interrupt mode
• It calls the bootloader_Tasks() function which receives application to be programmed into SD/eMMC/NAND/Serial Flash memory over CAN-FD bus. And, it loads application image from SD/eMMC/NAND/Serial Flash memory to DDR memory and executes it.
• It turns on an LED
• Trigger methods
  • It uses the On board Switch as bootloader trigger pin to force enter the bootloader at reset of device

SDCARD Host Application

• This is an embedded CAN-FD host application which sends the application image stored in the SD card to the target board over the CAN-FD bus
• The user application binary is copied into an SD card and inserted in the SD card connected on the host board

  

Test Application

• This is a test application which resides from:
  • Application stored into SD/eMMC/NAND/Serial Flash memory
• It will be loaded from SD/eMMC/NAND/Serial Flash memory to DDR memory by bootloader application and starts application execution
• It blinks an LED and provides console output