there are tow way in my idea now .
1. develop the system with mcu and it has a short develop time .
2.learn the complex cpu ,powerful ,mips and so on .develop there bsp.
the one way was so sample than the next one ,it has a short time ,if you have relationships ,you can earn more money in a short time .but if you have not it .you will ..hh. and more people can do this,because it easy to learn .
the next way was so hard to learn .no more people understand it .this cpu usually use in the big system ,for example the switch ,router .you can not develop this system by yourself .so you must stay at company and get the low pay .get the level off pay .and the company close down .you can easy to find another one ,can get the level off pay .again .
and whitch way suit to me..thinking............