diags - test code for our MBED board

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test code for our MBED board

i2c.c@0:9edfcca7cd25, 2010-01-12 (annotated)

Committer:: lolpcc
Date:: Tue Jan 12 16:49:56 2010 +0000
Revision:: 0:9edfcca7cd25
Child:: 1:6877bb99aa17

Who changed what in which revision?

User	Revision	Line number	New contents of line
lolpcc	0:9edfcca7cd25	1	#include "mbed.h"
lolpcc	0:9edfcca7cd25	2	#include "diags.h"
lolpcc	0:9edfcca7cd25	3
lolpcc	0:9edfcca7cd25	4	I2C i2c(p9, p10); // sda, scl
lolpcc	0:9edfcca7cd25	5
lolpcc	0:9edfcca7cd25	6	#define LCD 0xC6
lolpcc	0:9edfcca7cd25	7	#define SEVEN_SEG 0x70
lolpcc	0:9edfcca7cd25	8	#define PIO 0x40
lolpcc	0:9edfcca7cd25	9	/******************************************/
lolpcc	0:9edfcca7cd25	10	/* */
lolpcc	0:9edfcca7cd25	11	/* Probe the I2C bus, and show the */
lolpcc	0:9edfcca7cd25	12	/* user what we have found */
lolpcc	0:9edfcca7cd25	13	/* */
lolpcc	0:9edfcca7cd25	14	/* */
lolpcc	0:9edfcca7cd25	15	/* */
lolpcc	0:9edfcca7cd25	16	/******************************************/
lolpcc	0:9edfcca7cd25	17	void i2c_probe(void)
lolpcc	0:9edfcca7cd25	18	{
lolpcc	0:9edfcca7cd25	19	char buf[0x60];
lolpcc	0:9edfcca7cd25	20	sprintf(buf,"Searching for I2C devices...\n\r");
lolpcc	0:9edfcca7cd25	21	serial_output_string(buf);
lolpcc	0:9edfcca7cd25	22
lolpcc	0:9edfcca7cd25	23	int count = 0;
lolpcc	0:9edfcca7cd25	24	for (int address=4; address<256; address+=2) {
lolpcc	0:9edfcca7cd25	25	if (!i2c.write(address, NULL, 0)) { // 0 returned is ok
lolpcc	0:9edfcca7cd25	26	sprintf(buf," - I2C device found at address 0x%02X\n\r", address);
lolpcc	0:9edfcca7cd25	27	serial_output_string(buf);
lolpcc	0:9edfcca7cd25	28	count++;
lolpcc	0:9edfcca7cd25	29	}
lolpcc	0:9edfcca7cd25	30	}
lolpcc	0:9edfcca7cd25	31	sprintf(buf,"%d devices found\n\r", count);
lolpcc	0:9edfcca7cd25	32	serial_output_string(buf);
lolpcc	0:9edfcca7cd25	33	}
lolpcc	0:9edfcca7cd25	34
lolpcc	0:9edfcca7cd25	35	/******************************************/
lolpcc	0:9edfcca7cd25	36	/* */
lolpcc	0:9edfcca7cd25	37	/* Should display some basic data */
lolpcc	0:9edfcca7cd25	38	/* on the LCD interface */
lolpcc	0:9edfcca7cd25	39	/* */
lolpcc	0:9edfcca7cd25	40	/* */
lolpcc	0:9edfcca7cd25	41	/* */
lolpcc	0:9edfcca7cd25	42	/******************************************/
lolpcc	0:9edfcca7cd25	43	/* LCD tests */
lolpcc	0:9edfcca7cd25	44	void test_lcd(char t)
lolpcc	0:9edfcca7cd25	45	{
lolpcc	0:9edfcca7cd25	46	init_lcd();
lolpcc	0:9edfcca7cd25	47	clear_lcd();
lolpcc	0:9edfcca7cd25	48	write_lcd("this is a test");
lolpcc	0:9edfcca7cd25	49	}
lolpcc	0:9edfcca7cd25	50
lolpcc	0:9edfcca7cd25	51	char init_lcd(void)
lolpcc	0:9edfcca7cd25	52	{
lolpcc	0:9edfcca7cd25	53	char buf[4];
lolpcc	0:9edfcca7cd25	54	buf[0]=0;
lolpcc	0:9edfcca7cd25	55	buf[1]=19;
lolpcc	0:9edfcca7cd25	56	return(i2c.write(LCD,buf,2));
lolpcc	0:9edfcca7cd25	57	}
lolpcc	0:9edfcca7cd25	58	char clear_lcd(void)
lolpcc	0:9edfcca7cd25	59	{
lolpcc	0:9edfcca7cd25	60	char buf[4];
lolpcc	0:9edfcca7cd25	61	buf[0]=0;
lolpcc	0:9edfcca7cd25	62	buf[1]=12;
lolpcc	0:9edfcca7cd25	63	return(i2c.write(LCD,buf,2));
lolpcc	0:9edfcca7cd25	64	}
lolpcc	0:9edfcca7cd25	65	char set_lcd(char line, char col)
lolpcc	0:9edfcca7cd25	66	{
lolpcc	0:9edfcca7cd25	67	char buf[4];
lolpcc	0:9edfcca7cd25	68	buf[0]=0;
lolpcc	0:9edfcca7cd25	69	buf[1]=3;
lolpcc	0:9edfcca7cd25	70	buf[2]=line;
lolpcc	0:9edfcca7cd25	71	buf[3]=col;
lolpcc	0:9edfcca7cd25	72	return(i2c.write(LCD,buf,4));
lolpcc	0:9edfcca7cd25	73	}
lolpcc	0:9edfcca7cd25	74	char write_lcd(char *str)
lolpcc	0:9edfcca7cd25	75	{
lolpcc	0:9edfcca7cd25	76	char buf[0x60];
lolpcc	0:9edfcca7cd25	77	if(strlen(str)>50){
lolpcc	0:9edfcca7cd25	78	printf("Line length to long\n\r");
lolpcc	0:9edfcca7cd25	79	return(0);
lolpcc	0:9edfcca7cd25	80	}
lolpcc	0:9edfcca7cd25	81	sprintf(buf,"%c%s",'\0',str);
lolpcc	0:9edfcca7cd25	82	buf[0]=0;
lolpcc	0:9edfcca7cd25	83	return(i2c.write(LCD,buf,strlen(str)+1));
lolpcc	0:9edfcca7cd25	84	}
lolpcc	0:9edfcca7cd25	85	/******************************************/
lolpcc	0:9edfcca7cd25	86	/* */
lolpcc	0:9edfcca7cd25	87	/* Shoudl get some keys from the user */
lolpcc	0:9edfcca7cd25	88	/* pressing keys on the keypad */
lolpcc	0:9edfcca7cd25	89	/* and display this data on the LCD */
lolpcc	0:9edfcca7cd25	90	/* */
lolpcc	0:9edfcca7cd25	91	/* */
lolpcc	0:9edfcca7cd25	92	/******************************************/
lolpcc	0:9edfcca7cd25	93	/* Keyboard test code here */
lolpcc	0:9edfcca7cd25	94	void test_kbd(void)
lolpcc	0:9edfcca7cd25	95	{
lolpcc	0:9edfcca7cd25	96	}
lolpcc	0:9edfcca7cd25	97	char read_keyboard(void)
lolpcc	0:9edfcca7cd25	98	{
lolpcc	0:9edfcca7cd25	99	char buf[10];
lolpcc	0:9edfcca7cd25	100	i2c.read(LCD,buf,4);
lolpcc	0:9edfcca7cd25	101	if(buf[1]!=0){
lolpcc	0:9edfcca7cd25	102	switch(buf[1]){
lolpcc	0:9edfcca7cd25	103	case 0x01 :
lolpcc	0:9edfcca7cd25	104	return('1');
lolpcc	0:9edfcca7cd25	105	case 0x02 :
lolpcc	0:9edfcca7cd25	106	return('2');
lolpcc	0:9edfcca7cd25	107	case 0x04 :
lolpcc	0:9edfcca7cd25	108	return('3');
lolpcc	0:9edfcca7cd25	109	case 0x08 :
lolpcc	0:9edfcca7cd25	110	return('4');
lolpcc	0:9edfcca7cd25	111	case 0x10 :
lolpcc	0:9edfcca7cd25	112	return('5');
lolpcc	0:9edfcca7cd25	113	case 0x20 :
lolpcc	0:9edfcca7cd25	114	return('6');
lolpcc	0:9edfcca7cd25	115	case 0x40 :
lolpcc	0:9edfcca7cd25	116	return('7');
lolpcc	0:9edfcca7cd25	117	case 0x80 :
lolpcc	0:9edfcca7cd25	118	return('8');
lolpcc	0:9edfcca7cd25	119	}
lolpcc	0:9edfcca7cd25	120	}
lolpcc	0:9edfcca7cd25	121	if(buf[2]!=0){
lolpcc	0:9edfcca7cd25	122	switch(buf[2]){
lolpcc	0:9edfcca7cd25	123	case 0x01 :
lolpcc	0:9edfcca7cd25	124	return('9');
lolpcc	0:9edfcca7cd25	125	case 0x02 :
lolpcc	0:9edfcca7cd25	126	return('*');
lolpcc	0:9edfcca7cd25	127	case 0x04 :
lolpcc	0:9edfcca7cd25	128	return('0');
lolpcc	0:9edfcca7cd25	129	case 0x08 :
lolpcc	0:9edfcca7cd25	130	return('#');
lolpcc	0:9edfcca7cd25	131	}
lolpcc	0:9edfcca7cd25	132	}
lolpcc	0:9edfcca7cd25	133	return('\0');
lolpcc	0:9edfcca7cd25	134	}
lolpcc	0:9edfcca7cd25	135	/******************************************/
lolpcc	0:9edfcca7cd25	136	/* */
lolpcc	0:9edfcca7cd25	137	/* Should read and write data on the */
lolpcc	0:9edfcca7cd25	138	/* PCF8574 I/O expander, maybe with */
lolpcc	0:9edfcca7cd25	139	/* a loop back connector in time */
lolpcc	0:9edfcca7cd25	140	/* */
lolpcc	0:9edfcca7cd25	141	/* */
lolpcc	0:9edfcca7cd25	142	/******************************************/
lolpcc	0:9edfcca7cd25	143	/* PCF8574 tests */
lolpcc	0:9edfcca7cd25	144	void test_pio(char t)
lolpcc	0:9edfcca7cd25	145	{
lolpcc	0:9edfcca7cd25	146	}
lolpcc	0:9edfcca7cd25	147	/******************************************/
lolpcc	0:9edfcca7cd25	148	/* */
lolpcc	0:9edfcca7cd25	149	/* Send some data to the seven segment */
lolpcc	0:9edfcca7cd25	150	/* display device, showing the user */
lolpcc	0:9edfcca7cd25	151	/* what the SAA1064 can do */
lolpcc	0:9edfcca7cd25	152	/* */
lolpcc	0:9edfcca7cd25	153	/* */
lolpcc	0:9edfcca7cd25	154	/******************************************/
lolpcc	0:9edfcca7cd25	155
lolpcc	0:9edfcca7cd25	156	/* mapping of bit pattern to number 0-9 */
lolpcc	0:9edfcca7cd25	157	char sseg_map[15]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7c,0x07,0x7f,0x67};
lolpcc	0:9edfcca7cd25	158
lolpcc	0:9edfcca7cd25	159	void test_seven_seg(char loop)
lolpcc	0:9edfcca7cd25	160	{
lolpcc	0:9edfcca7cd25	161	unsigned char buf[10];
lolpcc	0:9edfcca7cd25	162	char a,b,c;
lolpcc	0:9edfcca7cd25	163
lolpcc	0:9edfcca7cd25	164	buf[0]=0;
lolpcc	0:9edfcca7cd25	165	buf[1]=0x27;
lolpcc	0:9edfcca7cd25	166	c=0;
lolpcc	0:9edfcca7cd25	167	i2c.write(SEVEN_SEG,(char *)buf,7);
lolpcc	0:9edfcca7cd25	168	while(c!=loop){
lolpcc	0:9edfcca7cd25	169	a = 1;
lolpcc	0:9edfcca7cd25	170	b = 0;
lolpcc	0:9edfcca7cd25	171	while(b!=8){
lolpcc	0:9edfcca7cd25	172	buf[2]=a<<b;
lolpcc	0:9edfcca7cd25	173	buf[3]=a<<b;
lolpcc	0:9edfcca7cd25	174	buf[4]=a<<b;
lolpcc	0:9edfcca7cd25	175	buf[5]=a<<b;
lolpcc	0:9edfcca7cd25	176	i2c.write(SEVEN_SEG,(char *)buf,7);
lolpcc	0:9edfcca7cd25	177	wait(0.5);
lolpcc	0:9edfcca7cd25	178	b++;
lolpcc	0:9edfcca7cd25	179	}
lolpcc	0:9edfcca7cd25	180	c++;
lolpcc	0:9edfcca7cd25	181	}
lolpcc	0:9edfcca7cd25	182	}
lolpcc	0:9edfcca7cd25	183
lolpcc	0:9edfcca7cd25	184	void print_seven_seg(unsigned char a,unsigned char b,unsigned char c,unsigned char d)
lolpcc	0:9edfcca7cd25	185	{
lolpcc	0:9edfcca7cd25	186	unsigned char buf[10];
lolpcc	0:9edfcca7cd25	187
lolpcc	0:9edfcca7cd25	188	buf[0]=0;
lolpcc	0:9edfcca7cd25	189	buf[1]=0x27;
lolpcc	0:9edfcca7cd25	190	buf[2]=a;
lolpcc	0:9edfcca7cd25	191	buf[3]=b;
lolpcc	0:9edfcca7cd25	192	buf[4]=d; /* Digits 3 and 4 are the wrong way round */
lolpcc	0:9edfcca7cd25	193	buf[5]=c;
lolpcc	0:9edfcca7cd25	194	i2c.write(SEVEN_SEG,(char *)buf,7);
lolpcc	0:9edfcca7cd25	195	}
lolpcc	0:9edfcca7cd25	196
lolpcc	0:9edfcca7cd25	197	void sseg_ticker_test(int t)
lolpcc	0:9edfcca7cd25	198	{
lolpcc	0:9edfcca7cd25	199	char a,b,c,d;
lolpcc	0:9edfcca7cd25	200	int z;
lolpcc	0:9edfcca7cd25	201
lolpcc	0:9edfcca7cd25	202	a = sseg_map[t/1000];
lolpcc	0:9edfcca7cd25	203	z = t%1000;
lolpcc	0:9edfcca7cd25	204	b = sseg_map[z/100];
lolpcc	0:9edfcca7cd25	205	z = z%100;
lolpcc	0:9edfcca7cd25	206	c = sseg_map[z/10];
lolpcc	0:9edfcca7cd25	207	z = z%10;
lolpcc	0:9edfcca7cd25	208	d = sseg_map[z];
lolpcc	0:9edfcca7cd25	209	print_seven_seg(a,b,c,d);
lolpcc	0:9edfcca7cd25	210	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	12 Jan 2010
Imports:	24
Forks:	0
Commits:	2
Dependents:	0
Dependencies:	2
Followers:	3

i2c.c@0:9edfcca7cd25, 2010-01-12 (annotated)

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