This routine walks the pSOS heap and returns the total amount of heap allocated to the current task ( maybe ). The sum returned does not include the header size, so if you malloc ( 100 ) the returned value will increase by exactly 100, not 100 plus h

在uvision环境下，两个数相加，观察各个寄存器的值的变化。-Sum of two numbers, to observe each register changes.

串口编程的范例,包含了CRC,SUM校验.-Serial programming examples, including the CRC, SUM checksum.