is the programming language /environment/libraries used in the 3 families of ARM processors(cortex-M,cortex-R and cortex-A) are the same ,i.e. if i learn for example cortex-R programming will i be able to make programs for the other two without relearning a whole new language/environment?
i know they probably will not be identical but ihope at least "upgrading" myself from one to the other takes a whole lots of learning .
how much they differ / are similar ?
note that i don't mean code compatibility but rather i don't like picking up books and learning too much ,any links to resources that will help me is highly appreciated.