/* check input bit-stream,
 * stream consists of blocks of 8 bits with start-stop bits around them
 * start bit=0, stop bit=1
 *
 * stream should start with one or more 1s.
 * waiting period between blocks are filled with any number of 1s (zero or more).
 */
#include <stdio.h>

//                      good           good     good        bad            good  ba
//                  ^12345678$     ^12345678$^12345678$  ^12345678     ^12345678$^0
char *stream = "1111001101010111111001001000100001001011101110111100111011111111101";

int main(int argc, char **argv) {
	while(*stream) {
		// skip starting and in-between blocks set of 1s
		while(*stream=='1') stream++;

		stream++; // skip start bit

		int b= 0 ;
		unsigned char block= 0 ;
		while(b< 8  && *stream) {
			if(*stream=='1') block |=  1 <<b;
			stream++;
			b++;
		}

		if(*stream == '1') {
			stream++;  // skip stop bit
			printf("%X ", block);
		} else {
			// incorrect stop bit
			// assume that block was of incorrect size
			// wait for 1s as a reset signal
			while(*stream=='0') stream++;
		}
	}
	return  0 ;
}