On Sat, Apr 25, 2009 at 11:41:43AM -0500, alfred steele wrote:
I am using uboot on the MX31 PDk board. I am trying to dump the contents of a status register found at location 50004004. This status register shows the status of the SDHC( SD card host controller) like interrupt , card insertion, card removal etc. According to the MX31 manual, the status register i.e the contents at the corresponding memory location should change on events like card insertion and removal. But the contents aren't changing as expected. I have verified this with Linux and it works.
The difference is most probably that under Linux, your IOMUX is set up correctly. IOW, the CPU does not see any external peripherals unless you enable the pins for the specific function you're trying to use.
Daniel