I’m trying to write a custom program that runs after Uboot (no Linux), I had success uploading the sample Hello World program that comes with Uboot, so my first test was to control the on/off leds with no success.
My question is, does Uboot configure some part of the memory to be read-only? What about the memory map? can I still configure my peripherals on the upper part of the memory?
Another question I have, is… how can I access the dataflash and nand memory? I want to read/write from them or at least just one is that possible?
Thanks for your help!