linux - Bash script that prints out contents of a binary file, one word at a time, without xxd -

i'd create bash script reads binary file, word (32-bits) word , pass word application called devmem.

right now, have:

... (( i=0; i<${num_words}; i++ ))     val=$(dd if=${file_name} skip=${i} count=1 bs=4 2>/dev/null)     echo -e "${val}" # weird output...     devmem ${some_address} 32 ${val} done ... 

${val} has weird (ascii?) format character representations looks diamond question mark.

if replace "val=" line with:

val=$(dd ... | xxd -r -p) 

i desired output.

what easiest way of replicating functionality of xxd using bash?

note: i'm working on embedded linux project requirements don't allow me install xxd.

this script performance driven, please correct me if i'm wrong in approach, reason chose (dd -> binary word -> devmem) instead of (hexdump -> file, parse file -> devmem). - regardless of optimal route end goal, exercise has been giving me trouble , i'd appreciate helping me figure out how this.

thanks!

as see shouldn't use '|' or echo, because both ascii tools. instead think '>' work you.
think devmem bash function or alias, try this:

for (( i=0; i<${num_words}; i++ ))     dd if=${file_name} skip=${i} count=1 bs=4 2>/dev/null 1> binary_file #    echo -e "${val}" # weird output...     devmem ${some_address} 32 $(cat binary_file) done 

"as cat catenates streams of bytes, can used concatenate binary files, concatenate sequence of bytes." wiki

or can alter devmem accept file input...i hope help!