Wolfgang Denk wrote:
In message 444FD06D.4060309@orkun.us you wrote:
Within a u-boot script (to be executed by autoscr command), I need to read a GPIO port and if a particular GPIO bit is set execute some conditional commands. I am not sure how to do this with test/itest commands. Any ideas?
This is obviously highly hardware specific.
I am not asking anything about hardware. Forget I said GPIO. Let's say a value in general memory space. It could be in ram or flash....
I know I can compare a simple value using itest command. e.g.
itest *4000 -eq 1234 && echo 'Addr 4000 contains 1234'
Now my problem is how can I test a bit of 32 bit quantity (say bit 4) stored at location 4000? This is a question about general hush/u-boot shell capability? It is a generic question...
Best regards, Tolunay