Nowadays, I am testing my own dm648 board, according to <<DM648 EVM Flashing and Booting Instructions.doc>>, I first burn the UBL into flash, then burn the app program. In the UBL, it will produce signals by gpio0, and the app will produce signals by gpio3, when the burning is completed, power up the board, the MCU could detect the signals sent by UBL, but could not detect the signals sent by app program. And if I just load UBL or app program to dsp, both of them can produce signal and the MCU can detect them. The app program is just changed the gpio pin based on the ubl and delete the copy flash part, so it should run independently. I doubt that the app didn't run successfully, but I can detect two times that dsp reading flash by detecting the flash pins.
How can I go on it?
thank you
zhu
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