Here are a couple of links that might be useful.

Translating PL/M to C
http://www.pennington.com/plmcee.htm
Shows an example PL/M program converted to 'C' using one of the automated translator programs.

C for Embedded Systems Part 1 - Introduction
http://www.esacademy.com/myacademy...classid=15

C for Embedded Systems Part 2 - Embedded Environment
http://www.esacademy.com/myacademy...classid=16