Some questions about Bit Stuffing and CRC32 etc. (USBCDC)

(Sorry for my limited English ability and limited technical ability.) I have been requested to design an I/O-Control (Communication) Protocol. This simple protocol is designed for a LPC23xx based...
Some questions about Bit Stuffing and CRC32 etc. (USBCDC)

(Sorry for my limited English ability and limited technical ability.) I have been requested to design an I/O-Control (Communication) Protocol. This simple protocol is designed for a LPC23xx based...
C51: functions returning bit type - efficiency and opinions for or against?

Does anybody have any insight into the efficiency gains or losses of using the Keil C51 bit type as a return value in a function? Relavent manual page is here: http://www.keil.com/support/man/docs...
C51: functions returning bit type - efficiency and opinions for or against?

Does anybody have any insight into the efficiency gains or losses of using the Keil C51 bit type as a return value in a function? Relavent manual page is here: http://www.keil.com/support/man/docs...
C51: 32 bits unsigned returned values treated as signed 16 bits

Hi! In a full project a simple unsigned long ( u32 )returned value from a function lead to this (odd) assembler code. It make us think that the u32 is considered as s16 ( signed short ). If...