Content originally posted in LPCWare by strom1 on Mon Nov 25 09:57:55 MST 2013 hello, i try to make my own mp3 player and took the code from: http://www.nxp.com/search?q=an11178&type=keyword&rows=10 i work with nxpxpresso 6. there is always problem with the assembler code. i allways get hardfault. the problem is because of clz and polyphasestereo() . for clz i can solve the problem. i use the c code, but there is no polyphasestereo.c in the projekt.