In message 444FDD08.2010101@orkun.us you wrote:
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...
At the moment there is no command that implements this. As you probaly are aware, the "itest" command just implements the following operations:
op_tbl_t op_table [] = { { "-lt", LT }, { "<" , LT }, { "-gt", GT }, { ">" , GT }, { "-eq", EQ }, { "==" , EQ }, { "-ne", NE }, { "!=" , NE }, { "<>" , NE }, { "-ge", GE }, { ">=" , GE }, { "-le", LE }, { "<=" , LE }, };
Feel free to add new commands for AND, OR, and XOR...
Best regards,
Wolfgang Denk