AL202C_LCD - RDM630 RFID Module with I2C LCD

Users » TimV » Code » AL202C_LCD

Tim Vukman / Mbed 2 deprecated AL202C_LCD

RDM630 RFID Module with I2C LCD

main.cpp@0:b2f4150fe624, 2010-05-22 (annotated)

Committer:: TimV
Date:: Sat May 22 20:19:03 2010 +0000
Revision:: 0:b2f4150fe624

Who changed what in which revision?

User	Revision	Line number	New contents of line
TimV	0:b2f4150fe624	1	#include "mbed.h"
TimV	0:b2f4150fe624	2	//
TimV	0:b2f4150fe624	3	DigitalOut led1(LED1);
TimV	0:b2f4150fe624	4	DigitalOut led2(LED2);
TimV	0:b2f4150fe624	5	DigitalOut led3(LED3);
TimV	0:b2f4150fe624	6	DigitalOut led4(LED4);
TimV	0:b2f4150fe624	7	Serial RFID (p28,p27);
TimV	0:b2f4150fe624	8	I2C LCD (p9,p10);
TimV	0:b2f4150fe624	9	Serial pc (USBTX,USBRX);
TimV	0:b2f4150fe624	10	int LCD_address = 0x50; // I2C address of AL202C display
TimV	0:b2f4150fe624	11	int LCD_command = 0xFE; // Sets "command" for display
TimV	0:b2f4150fe624	12	int LCD_option = 0x00; // Used to pass value of display command ie Clear_Display
TimV	0:b2f4150fe624	13	int LCD_col = 0; // holder for column value 1 - 16
TimV	0:b2f4150fe624	14	int LCD_row = 0; // holder for row value 1 - 2
TimV	0:b2f4150fe624	15	//
TimV	0:b2f4150fe624	16	// Functions to be included in display library
TimV	0:b2f4150fe624	17	//**************************************************************************************
TimV	0:b2f4150fe624	18	//* Auto Scroll ON
TimV	0:b2f4150fe624	19	//**************************************************************************************
TimV	0:b2f4150fe624	20	void LCD_auto_scroll_On(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	21	{
TimV	0:b2f4150fe624	22	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	23	LCD_option = 0x51; // Auto Scroll On
TimV	0:b2f4150fe624	24	char cmd[2];
TimV	0:b2f4150fe624	25	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	26	cmd[1] = LCD_option; // 0x51
TimV	0:b2f4150fe624	27	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	28	}
TimV	0:b2f4150fe624	29	//
TimV	0:b2f4150fe624	30	//**************************************************************************************
TimV	0:b2f4150fe624	31	//* Auto Scroll OFF
TimV	0:b2f4150fe624	32	//**************************************************************************************
TimV	0:b2f4150fe624	33	void LCD_auto_scroll_Off(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	34	{
TimV	0:b2f4150fe624	35	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	36	LCD_option = 0x52; // Auto Scroll Off
TimV	0:b2f4150fe624	37	char cmd[2];
TimV	0:b2f4150fe624	38	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	39	cmd[1] = LCD_option; // 0x52
TimV	0:b2f4150fe624	40	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	41	}
TimV	0:b2f4150fe624	42	//
TimV	0:b2f4150fe624	43	//**************************************************************************************
TimV	0:b2f4150fe624	44	//* Clear Screen
TimV	0:b2f4150fe624	45	//**************************************************************************************
TimV	0:b2f4150fe624	46	void LCD_clear_screen(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	47	{
TimV	0:b2f4150fe624	48	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	49	LCD_option = 0x58; // Clear Screen
TimV	0:b2f4150fe624	50	char cmd[2];
TimV	0:b2f4150fe624	51	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	52	cmd[1] = LCD_option; // 0x58
TimV	0:b2f4150fe624	53	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	54	}
TimV	0:b2f4150fe624	55	//
TimV	0:b2f4150fe624	56	//**************************************************************************************
TimV	0:b2f4150fe624	57	//* Auto Line Wrap ON
TimV	0:b2f4150fe624	58	//**************************************************************************************
TimV	0:b2f4150fe624	59	void LCD_line_wrap_On(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	60	{
TimV	0:b2f4150fe624	61	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	62	LCD_option = 0x43; // Auto Line Wrap On
TimV	0:b2f4150fe624	63	char cmd[2];
TimV	0:b2f4150fe624	64	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	65	cmd[1] = LCD_option; // 0x43
TimV	0:b2f4150fe624	66	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	67	}
TimV	0:b2f4150fe624	68	//
TimV	0:b2f4150fe624	69	//**************************************************************************************
TimV	0:b2f4150fe624	70	//* Auto Line Wrap OFF
TimV	0:b2f4150fe624	71	//**************************************************************************************
TimV	0:b2f4150fe624	72	void LCD_line_wrap_Off(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	73	{
TimV	0:b2f4150fe624	74	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	75	LCD_option = 0x44; // Auto Line Wrap Off
TimV	0:b2f4150fe624	76	char cmd[2];
TimV	0:b2f4150fe624	77	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	78	cmd[1] = LCD_option; // 0x44
TimV	0:b2f4150fe624	79	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	80	}
TimV	0:b2f4150fe624	81	//
TimV	0:b2f4150fe624	82	//**************************************************************************************
TimV	0:b2f4150fe624	83	//* Go Home
TimV	0:b2f4150fe624	84	//**************************************************************************************
TimV	0:b2f4150fe624	85	void LCD_go_home(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	86	{
TimV	0:b2f4150fe624	87	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	88	LCD_option = 0x48; // Go Home
TimV	0:b2f4150fe624	89	char cmd[2];
TimV	0:b2f4150fe624	90	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	91	cmd[1] = LCD_option; // 0x48
TimV	0:b2f4150fe624	92	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	93	}
TimV	0:b2f4150fe624	94	//
TimV	0:b2f4150fe624	95	//**************************************************************************************
TimV	0:b2f4150fe624	96	//* Move Cursor Forward
TimV	0:b2f4150fe624	97	//**************************************************************************************
TimV	0:b2f4150fe624	98	void LCD_cursor_forward(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	99	{
TimV	0:b2f4150fe624	100	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	101	LCD_option = 0x4D; // Move Cursor Forward
TimV	0:b2f4150fe624	102	char cmd[2];
TimV	0:b2f4150fe624	103	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	104	cmd[1] = LCD_option; // 0x4D
TimV	0:b2f4150fe624	105	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	106	}
TimV	0:b2f4150fe624	107	//
TimV	0:b2f4150fe624	108	//**************************************************************************************
TimV	0:b2f4150fe624	109	//* Move Cursor Backward
TimV	0:b2f4150fe624	110	//**************************************************************************************
TimV	0:b2f4150fe624	111	void LCD_cursor_backward(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	112	{
TimV	0:b2f4150fe624	113	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	114	LCD_option = 0x4C; // Move Cursor Backward
TimV	0:b2f4150fe624	115	char cmd[2];
TimV	0:b2f4150fe624	116	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	117	cmd[1] = LCD_option; // 0x4C
TimV	0:b2f4150fe624	118	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	119	}
TimV	0:b2f4150fe624	120	//
TimV	0:b2f4150fe624	121	//**************************************************************************************
TimV	0:b2f4150fe624	122	//* Cursor Underline ON
TimV	0:b2f4150fe624	123	//**************************************************************************************
TimV	0:b2f4150fe624	124	void LCD_underline_on(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	125	{
TimV	0:b2f4150fe624	126	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	127	LCD_option = 0x4A; // Cursor Underline On
TimV	0:b2f4150fe624	128	char cmd[2];
TimV	0:b2f4150fe624	129	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	130	cmd[1] = LCD_option; // 0x4A
TimV	0:b2f4150fe624	131	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	132	}
TimV	0:b2f4150fe624	133	//
TimV	0:b2f4150fe624	134	//**************************************************************************************
TimV	0:b2f4150fe624	135	//* Cursor Underline OFF
TimV	0:b2f4150fe624	136	//**************************************************************************************
TimV	0:b2f4150fe624	137	void LCD_underline_off(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	138	{
TimV	0:b2f4150fe624	139	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	140	LCD_option = 0x4B; // Cursor Underline Off
TimV	0:b2f4150fe624	141	char cmd[2];
TimV	0:b2f4150fe624	142	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	143	cmd[1] = LCD_option; // 0x4B
TimV	0:b2f4150fe624	144	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	145	}
TimV	0:b2f4150fe624	146	//
TimV	0:b2f4150fe624	147	//**************************************************************************************
TimV	0:b2f4150fe624	148	//* Cursor Blinking Block ON
TimV	0:b2f4150fe624	149	//**************************************************************************************
TimV	0:b2f4150fe624	150	void LCD_blink_on(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	151	{
TimV	0:b2f4150fe624	152	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	153	LCD_option = 0x53; // Cursor Blinking Block On
TimV	0:b2f4150fe624	154	char cmd[2];
TimV	0:b2f4150fe624	155	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	156	cmd[1] = LCD_option; // 0x53
TimV	0:b2f4150fe624	157	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	158	}
TimV	0:b2f4150fe624	159	//
TimV	0:b2f4150fe624	160	//**************************************************************************************
TimV	0:b2f4150fe624	161	//* Cursor Blinking Block OFF
TimV	0:b2f4150fe624	162	//**************************************************************************************
TimV	0:b2f4150fe624	163	void LCD_blink_off(int LCD_command, int LCD_option)
TimV	0:b2f4150fe624	164	{
TimV	0:b2f4150fe624	165	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	166	LCD_option = 0x54; // Cursor Blinking Block Off
TimV	0:b2f4150fe624	167	char cmd[2];
TimV	0:b2f4150fe624	168	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	169	cmd[1] = LCD_option; // 0x54
TimV	0:b2f4150fe624	170	LCD.write(LCD_address, cmd, 2); // Send command element
TimV	0:b2f4150fe624	171	}
TimV	0:b2f4150fe624	172	//
TimV	0:b2f4150fe624	173	//**************************************************************************************
TimV	0:b2f4150fe624	174	//* Set Cursor Position
TimV	0:b2f4150fe624	175	//**************************************************************************************
TimV	0:b2f4150fe624	176	void LCD_cursor_position(int LCD_command, int LCD_option, int LCD_col, int LCD_row)
TimV	0:b2f4150fe624	177	{
TimV	0:b2f4150fe624	178	LCD_command = 0xFE; // command designator
TimV	0:b2f4150fe624	179	LCD_option = 0x47; // Cursor Blinking Block Off
TimV	0:b2f4150fe624	180	char cmd[4];
TimV	0:b2f4150fe624	181	cmd[0] = LCD_command; // 0xFE
TimV	0:b2f4150fe624	182	cmd[1] = LCD_option; // 0x47
TimV	0:b2f4150fe624	183	cmd[2] = LCD_col; // Valid = 1 - 16
TimV	0:b2f4150fe624	184	cmd[3] = LCD_row; // Valid = 1 - 2
TimV	0:b2f4150fe624	185	LCD.write(LCD_address, cmd, 4); // Send command elements
TimV	0:b2f4150fe624	186	}
TimV	0:b2f4150fe624	187	//
TimV	0:b2f4150fe624	188	//************************************************************************
TimV	0:b2f4150fe624	189	// LCD Write First Row Init Function
TimV	0:b2f4150fe624	190	//************************************************************************
TimV	0:b2f4150fe624	191	void LCD_First_Row(int LCD_address)
TimV	0:b2f4150fe624	192	{
TimV	0:b2f4150fe624	193	char letters[17];
TimV	0:b2f4150fe624	194	letters[0] = 'D';
TimV	0:b2f4150fe624	195	letters[1] = 'i';
TimV	0:b2f4150fe624	196	letters[2] = 's';
TimV	0:b2f4150fe624	197	letters[3] = 'p';
TimV	0:b2f4150fe624	198	letters[4] = 'l';
TimV	0:b2f4150fe624	199	letters[5] = 'a';
TimV	0:b2f4150fe624	200	letters[6] = 'y';
TimV	0:b2f4150fe624	201	letters[7] = '.';
TimV	0:b2f4150fe624	202	letters[8] = '.';
TimV	0:b2f4150fe624	203	letters[9] = '.';
TimV	0:b2f4150fe624	204	letters[10] = '.';
TimV	0:b2f4150fe624	205	letters[11] = ' ';
TimV	0:b2f4150fe624	206	letters[12] = 'R';
TimV	0:b2f4150fe624	207	letters[13] = 'e';
TimV	0:b2f4150fe624	208	letters[14] = 'a';
TimV	0:b2f4150fe624	209	letters[15] = 'd';
TimV	0:b2f4150fe624	210	letters[16] = 'y';
TimV	0:b2f4150fe624	211	LCD.write(LCD_address, letters, 17); // Send data elements
TimV	0:b2f4150fe624	212	}
TimV	0:b2f4150fe624	213	//
TimV	0:b2f4150fe624	214	//************************************************************************
TimV	0:b2f4150fe624	215	// LCD Write Second Row Init Function
TimV	0:b2f4150fe624	216	//************************************************************************
TimV	0:b2f4150fe624	217	void LCD_Second_Row(int LCD_address)
TimV	0:b2f4150fe624	218	{
TimV	0:b2f4150fe624	219	char letters[17];
TimV	0:b2f4150fe624	220	letters[0] = 'R';
TimV	0:b2f4150fe624	221	letters[1] = 'F';
TimV	0:b2f4150fe624	222	letters[2] = 'I';
TimV	0:b2f4150fe624	223	letters[3] = 'D';
TimV	0:b2f4150fe624	224	letters[4] = ' ';
TimV	0:b2f4150fe624	225	letters[5] = 'M';
TimV	0:b2f4150fe624	226	letters[6] = 'o';
TimV	0:b2f4150fe624	227	letters[7] = 'd';
TimV	0:b2f4150fe624	228	letters[8] = 'u';
TimV	0:b2f4150fe624	229	letters[9] = 'l';
TimV	0:b2f4150fe624	230	letters[10] = 'e';
TimV	0:b2f4150fe624	231	letters[11] = ' ';
TimV	0:b2f4150fe624	232	letters[12] = 'R';
TimV	0:b2f4150fe624	233	letters[13] = 'e';
TimV	0:b2f4150fe624	234	letters[14] = 'a';
TimV	0:b2f4150fe624	235	letters[15] = 'd';
TimV	0:b2f4150fe624	236	letters[16] = 'y';
TimV	0:b2f4150fe624	237	LCD.write(LCD_address, letters, 17); // Send data elements
TimV	0:b2f4150fe624	238	}
TimV	0:b2f4150fe624	239	//
TimV	0:b2f4150fe624	240	//************************************************************************
TimV	0:b2f4150fe624	241	// LCD Write First Row2 Init Function
TimV	0:b2f4150fe624	242	//************************************************************************
TimV	0:b2f4150fe624	243	void LCD_First2_Row(int LCD_address)
TimV	0:b2f4150fe624	244	{
TimV	0:b2f4150fe624	245	char letters[17];
TimV	0:b2f4150fe624	246	letters[0] = 'S';
TimV	0:b2f4150fe624	247	letters[1] = 'c';
TimV	0:b2f4150fe624	248	letters[2] = 'a';
TimV	0:b2f4150fe624	249	letters[3] = 'n';
TimV	0:b2f4150fe624	250	letters[4] = ' ';
TimV	0:b2f4150fe624	251	letters[5] = 'T';
TimV	0:b2f4150fe624	252	letters[6] = 'a';
TimV	0:b2f4150fe624	253	letters[7] = 'g';
TimV	0:b2f4150fe624	254	letters[8] = '.';
TimV	0:b2f4150fe624	255	letters[9] = '.';
TimV	0:b2f4150fe624	256	letters[10] = '.';
TimV	0:b2f4150fe624	257	letters[11] = '.';
TimV	0:b2f4150fe624	258	letters[12] = '.';
TimV	0:b2f4150fe624	259	letters[13] = '.';
TimV	0:b2f4150fe624	260	letters[14] = '.';
TimV	0:b2f4150fe624	261	letters[15] = '.';
TimV	0:b2f4150fe624	262	letters[16] = ' ';
TimV	0:b2f4150fe624	263	LCD.write(LCD_address, letters, 17); // Send data elements
TimV	0:b2f4150fe624	264	}
TimV	0:b2f4150fe624	265	//
TimV	0:b2f4150fe624	266	//************************************************************************
TimV	0:b2f4150fe624	267	// LCD Write Second2 Row Init Function
TimV	0:b2f4150fe624	268	//************************************************************************
TimV	0:b2f4150fe624	269	void LCD_Blank_Row(int LCD_address)
TimV	0:b2f4150fe624	270	{
TimV	0:b2f4150fe624	271	char letters[17];
TimV	0:b2f4150fe624	272	letters[0] = 0x20; //
TimV	0:b2f4150fe624	273	letters[1] = 0x20; //
TimV	0:b2f4150fe624	274	letters[2] = 0x20; //
TimV	0:b2f4150fe624	275	letters[3] = 0x20; //
TimV	0:b2f4150fe624	276	letters[4] = 0x20; //
TimV	0:b2f4150fe624	277	letters[5] = 0x20; //
TimV	0:b2f4150fe624	278	letters[6] = 0x20; //
TimV	0:b2f4150fe624	279	letters[7] = 0x20; //
TimV	0:b2f4150fe624	280	letters[8] = 0x20; //
TimV	0:b2f4150fe624	281	letters[9] = 0x20; //
TimV	0:b2f4150fe624	282	letters[10] = 0x20; //
TimV	0:b2f4150fe624	283	letters[11] = 0x20; //
TimV	0:b2f4150fe624	284	letters[12] = 0x20; //
TimV	0:b2f4150fe624	285	letters[13] = 0x20; //
TimV	0:b2f4150fe624	286	letters[14] = 0x20; //
TimV	0:b2f4150fe624	287	letters[15] = 0x20; //
TimV	0:b2f4150fe624	288	letters[16] = 0x20; //
TimV	0:b2f4150fe624	289	LCD.write(LCD_address, letters, 17); // Send data elements
TimV	0:b2f4150fe624	290	}
TimV	0:b2f4150fe624	291	void setup()
TimV	0:b2f4150fe624	292	{
TimV	0:b2f4150fe624	293	led1 = 1;
TimV	0:b2f4150fe624	294	}
TimV	0:b2f4150fe624	295	//
TimV	0:b2f4150fe624	296	//**************************************************************************************
TimV	0:b2f4150fe624	297	//* Read RFID Tag *
TimV	0:b2f4150fe624	298	//**************************************************************************************
TimV	0:b2f4150fe624	299	//* *
TimV	0:b2f4150fe624	300	//**************************************************************************************
TimV	0:b2f4150fe624	301	//* This code is from the book Practical Arduino by Jonathon Oxer and Hugh Blemings *
TimV	0:b2f4150fe624	302	//* Other than as noted, I have reproduced it as written and with the authors *
TimV	0:b2f4150fe624	303	//* comments and explanations. *
TimV	0:b2f4150fe624	304	//**************************************************************************************
TimV	0:b2f4150fe624	305	void loop()
TimV	0:b2f4150fe624	306	{
TimV	0:b2f4150fe624	307	pc.baud(9600);
TimV	0:b2f4150fe624	308	RFID.baud(9600);
TimV	0:b2f4150fe624	309	int val = 0; // this should hold the character read from the reader
TimV	0:b2f4150fe624	310	int checksum = 0; // this is checked against a calculated checksum
TimV	0:b2f4150fe624	311	int bytesRead = 0; // counter if number of bytes read (2 characters per)
TimV	0:b2f4150fe624	312	int tempByte = 0; // storage for character retreived
TimV	0:b2f4150fe624	313	int tagBytes[6]; // or 12 characters. 5 bytes is tag value 1 is for checksum
TimV	0:b2f4150fe624	314	char tagValue[11]; // the actual tag information +1 for adding null at string end
TimV	0:b2f4150fe624	315	led2=1;
TimV	0:b2f4150fe624	316	LCD_clear_screen(LCD_command, LCD_option);
TimV	0:b2f4150fe624	317	wait(1);
TimV	0:b2f4150fe624	318	LCD_First_Row(LCD_address);
TimV	0:b2f4150fe624	319	LCD_col = 1;
TimV	0:b2f4150fe624	320	LCD_row = 2;
TimV	0:b2f4150fe624	321	LCD_cursor_position(LCD_command, LCD_option, LCD_col, LCD_row);
TimV	0:b2f4150fe624	322	wait(0.5);
TimV	0:b2f4150fe624	323	pc.printf("RFID Module Ready \n\r");
TimV	0:b2f4150fe624	324	wait(0.5);
TimV	0:b2f4150fe624	325	LCD_Second_Row(LCD_address);
TimV	0:b2f4150fe624	326	wait(2);
TimV	0:b2f4150fe624	327	LCD_clear_screen(LCD_command, LCD_option);
TimV	0:b2f4150fe624	328	wait(1);
TimV	0:b2f4150fe624	329	LCD_First2_Row(LCD_address);
TimV	0:b2f4150fe624	330	wait(0.5);
TimV	0:b2f4150fe624	331	while(1)
TimV	0:b2f4150fe624	332	{
TimV	0:b2f4150fe624	333	if (RFID.readable())
TimV	0:b2f4150fe624	334	{
TimV	0:b2f4150fe624	335	val = RFID.getc();
TimV	0:b2f4150fe624	336	if (val == 2)
TimV	0:b2f4150fe624	337	{
TimV	0:b2f4150fe624	338	bytesRead = 0;
TimV	0:b2f4150fe624	339	for (bytesRead = 0; bytesRead < 12; bytesRead++)
TimV	0:b2f4150fe624	340	{
TimV	0:b2f4150fe624	341	val = RFID.getc();
TimV	0:b2f4150fe624	342	if ((val == 0x0D) \|\| (val == 0x0A) \|\| (val == 0x03) \|\| (val == 0x02))
TimV	0:b2f4150fe624	343	{
TimV	0:b2f4150fe624	344	break;
TimV	0:b2f4150fe624	345	}
TimV	0:b2f4150fe624	346	if (bytesRead < 10)
TimV	0:b2f4150fe624	347	{
TimV	0:b2f4150fe624	348	tagValue[bytesRead] = val;
TimV	0:b2f4150fe624	349	}
TimV	0:b2f4150fe624	350	if ((val >= '0') && (val <= '9'))
TimV	0:b2f4150fe624	351	{
TimV	0:b2f4150fe624	352	val = val - '0';
TimV	0:b2f4150fe624	353	}
TimV	0:b2f4150fe624	354	else if ((val >= 'A') && (val <= 'F'))
TimV	0:b2f4150fe624	355	{
TimV	0:b2f4150fe624	356	val = 10 + val - 'A';
TimV	0:b2f4150fe624	357	}
TimV	0:b2f4150fe624	358	if (bytesRead & 1 == 1)
TimV	0:b2f4150fe624	359	{
TimV	0:b2f4150fe624	360	tagBytes[bytesRead >> 1] = (val \| (tempByte << 4));
TimV	0:b2f4150fe624	361	// It then checks if it has reached the checksum byte, and if so calculates the checksum
TimV	0:b2f4150fe624	362	if (bytesRead >> 1 != 5)
TimV	0:b2f4150fe624	363	{
TimV	0:b2f4150fe624	364	checksum ^= tagBytes[bytesRead >> 1];
TimV	0:b2f4150fe624	365	};
TimV	0:b2f4150fe624	366	// This part of the code then deals with the first of a pair of hex digits by simply
TimV	0:b2f4150fe624	367	// putting the value directly into a variable. This value will then be shifted 4 bits to
TimV	0:b2f4150fe624	368	// the left on the next loop through by the code above.
TimV	0:b2f4150fe624	369	}
TimV	0:b2f4150fe624	370	else
TimV	0:b2f4150fe624	371	{
TimV	0:b2f4150fe624	372	tempByte = val;
TimV	0:b2f4150fe624	373	};
TimV	0:b2f4150fe624	374	// The program them increments the counter that tracks how many bytes have been read and
TimV	0:b2f4150fe624	375	// reaches the end of the loop, going back to the start to check if it has finished reading
TimV	0:b2f4150fe624	376	// all the digits yet.
TimV	0:b2f4150fe624	377	}
TimV	0:b2f4150fe624	378	// The program checks if 12 bytes have been read, indicating that it has a complete read and
TimV	0:b2f4150fe624	379	// can move on to comparing the acquired value with its list of authorized tags.
TimV	0:b2f4150fe624	380	if (bytesRead == 12)
TimV	0:b2f4150fe624	381	{
TimV	0:b2f4150fe624	382	pc.printf("Tag Value: %s\n\r", tagValue);
TimV	0:b2f4150fe624	383	LCD_col = 1;
TimV	0:b2f4150fe624	384	LCD_row = 2;
TimV	0:b2f4150fe624	385	LCD_cursor_position(LCD_command, LCD_option, LCD_col, LCD_row);
TimV	0:b2f4150fe624	386	wait(0.5);
TimV	0:b2f4150fe624	387	LCD.write(LCD_address, tagValue, 10);
TimV	0:b2f4150fe624	388	}
TimV	0:b2f4150fe624	389	}
TimV	0:b2f4150fe624	390	}
TimV	0:b2f4150fe624	391	}
TimV	0:b2f4150fe624	392	}
TimV	0:b2f4150fe624	393	//
TimV	0:b2f4150fe624	394	int main()
TimV	0:b2f4150fe624	395	{//a->
TimV	0:b2f4150fe624	396	pc.printf("mbed Serial Terminal \n\r");
TimV	0:b2f4150fe624	397	setup();
TimV	0:b2f4150fe624	398	while (1)
TimV	0:b2f4150fe624	399	{
TimV	0:b2f4150fe624	400	loop();
TimV	0:b2f4150fe624	401	}
TimV	0:b2f4150fe624	402	}//a<-

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	22 May 2010
Imports:	25
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	2

main.cpp@0:b2f4150fe624, 2010-05-22 (annotated)

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