Posted on July 28, 2014 at 08:05Segger has their J-Flash application which should permit external NAND, or serial, devices to be programmed with binary or hex files. Keil also achieves similar functionality through applets (custom if required), that code the external bus configuration/control, and programming of internal/external memories. Both basically payload a flasher into RAM, along with blocks of data to be written. There are code framework examples.
You can achieve similar tasks with the System Loader on the STM32, upload some code, execute it, and it can work on data already sent, or you can revert to another protocol (X-Modem, or whatever), to push in other streams of data. Repeat as required based on available RAM, and size of device being programmed.
You could also add initialization code within your own app to permit the download of images to external memories.
