uniflash

UART Uniflash

The UART Uniflash is a scripted method to load an application into the device's flash using Python's interpreter. To flash an application into the flash via UART using Uniflash, it is necessary to first load a flash-writer application that is run by the R5 core from internal RAM. The flash writer then writes the application into the flash using some allocated memory (in MSRAM or DDR-RAM) as a cache.

Flashing

• Power off the board.

• Set the boot mode to UART BOOT via the DIP-switches:

  	1	2	3	4
  S4	ON	ON	OFF	ON
  S5	ON	ON	OFF	OFF
  S6	OFF	ON	OFF	OFF
  S7	OFF	OFF	OFF	OFF

• Power on the board.

• Open CMD or shell.

  • Execute Uniflash using Python's interpreter.
  • Select the desired configuration file or create a configuration file.

    python uart_uniflash.py -p COM<X> --cfg examples/bsp_flash_hsfs.cfg

  • Optionally, use the uniflash_gui.
  • NOTE: All files selected are relative to their root directory.

• After successfull flash, power off the board set OSPI BOOT via DIP-switches and power on again.

• Your application should be running.

Notes

The flash-writer itself is a ROM-loader readable boot image that can be seen as an SBL application. The flash-writer will write another SBL into the flash along with the application image. To edit both SBLs used in this repository, you can use the projects listed in this directory.

• tq_sbl_uart_uniflash (Flash-writer)

• tq_sbl_ospi (SBL for the xSPI boot).

• NOTE: Both default SBL applications do not use or initialize DDR-RAM.

• NOTE: Be aware of the OSPI configurations that may be needed.

• NOTE: Note that the ROM-loader will look for a second bootloader (SBL) at address 0x00.

• NOTE: By default, the SBL is configured to jump to address 0x80000 after boot. The application is expected there by the SBL.

• NOTE: Further information on the flashing process can be found here