C++ (Cpp) hex_to_num Examples

Example #1

File: json_reader.cpp Project: skyui-cdel/MyFirstGit

	Char_type hex_str_to_char( Iter_type& begin )
	{
		const Char_type c1( *( ++begin ) );
		const Char_type c2( *( ++begin ) );

		return ( hex_to_num( c1 ) << 4 ) + hex_to_num( c2 );
	}

Example #2

File: json_reader.cpp Project: skyui-cdel/MyFirstGit

	Char_type unicode_str_to_char(Iter_type& begin )
	{
		const Char_type c1( *( ++begin ) );
		const Char_type c2( *( ++begin ) );
		const Char_type c3( *( ++begin ) );
		const Char_type c4( *( ++begin ) );

		return ( hex_to_num( c1 ) << 12 ) + 
			( hex_to_num( c2 ) <<  8 ) + 
			( hex_to_num( c3 ) <<  4 ) + 
			hex_to_num( c4 );
	}

Example #3

File: gps_l80.cpp Project: rgagne002/SkyDrop

void gps_parse(Usart * c_uart)
{
	uint8_t c = c_uart->Read();

//	DEBUG("%c", c);

	switch (gps_parser_state)
	{
		case(GPS_IDLE):
			if (c == '$')
			{
				gps_parser_buffer_index = 0;
				gps_checksum = 0;
				gps_parser_state = GPS_DATA;
			}
//			else
//			{
//				gps_parser_buffer_index++;
//				if (gps_parser_buffer_index > 10)
//				{
//					gps_set_baudrate();
//					gps_change_uart_baudrate();
//					gps_parser_buffer_index = 0;
//				}
//			}
		break;

		case(GPS_DATA):
			if (c == '*')
			{
				gps_parser_buffer[gps_parser_buffer_index] = c;
				gps_parser_buffer_index++;

				gps_parser_state = GPS_CRC;
			}
			else
			{
				gps_checksum ^= c;
				gps_parser_buffer[gps_parser_buffer_index] = c;
				gps_parser_buffer_index++;
			}

			if (gps_parser_buffer_index >= NMEA_MAX_LEN)
			{
				assert(0);
				gps_parser_buffer_index = 0;
				gps_parser_state = GPS_IDLE;
			}
		break;

		case(GPS_CRC):
			gps_rx_checksum = hex_to_num(c) << 4;
			gps_parser_buffer[gps_parser_buffer_index] = c;
			gps_parser_buffer_index++;

			gps_parser_state = GPS_END;
		break;

		case(GPS_END):
			gps_rx_checksum += hex_to_num(c);
			gps_parser_buffer[gps_parser_buffer_index] = c;
			gps_parser_buffer[gps_parser_buffer_index + 1] = '\n';
			gps_parser_buffer[gps_parser_buffer_index + 2] = '\0';

			gps_parser_buffer_index = 0;
			gps_parser_state = GPS_IDLE;

//			DEBUG(">>%s<<\n", gps_parser_buffer);

			if (gps_rx_checksum == gps_checksum)
			{
				if (cmpn_p(gps_parser_buffer, PSTR("GP"), 2))
				{
					gps_parser_ptr = gps_parser_buffer + 2;

					if (cmpn_p(gps_parser_ptr, PSTR("RMC"), 3))
						gps_parse_rmc();

					if (cmpn_p(gps_parser_ptr, PSTR("GGA"), 3))
						gps_parse_gga();

					if (cmpn_p(gps_parser_ptr, PSTR("GSA"), 3))
						gps_parse_gsa();

					if (cmpn_p(gps_parser_ptr, PSTR("GSV"), 3))
						gps_parse_gsv();
				}
				else if (cmpn_p(gps_parser_buffer, PSTR("PMTK"), 4))
				{
					gps_parser_ptr = gps_parser_buffer + 4;

					if (cmpn_p(gps_parser_ptr, PSTR("011"), 3))
						gps_parse_hello();

					if (cmpn_p(gps_parser_ptr, PSTR("010"), 3))
						gps_parse_sys();
				}

			}
			else
			{
				DEBUG(">>%s<<\n", gps_parser_buffer);
				DEBUG("GPS CHECKSUM IS WRONG! %02X %02X\n", gps_rx_checksum, gps_checksum);
			}
		break;


	}
}