DOGLCDDemo - A demo program for DOGL-128 LCD module. Based on …

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Igor Skochinsky / Mbed 2 deprecated DOGLCDDemo

A demo program for DOGL-128 LCD module. Based on Mike Sheldon's 3D Tie Fighter demo.

LCD/DogLCD.cpp@0:2a5dccfd318f, 2010-01-14 (annotated)

Committer:: igorsk
Date:: Thu Jan 14 00:49:39 2010 +0000
Revision:: 0:2a5dccfd318f

Who changed what in which revision?

User	Revision	Line number	New contents of line
igorsk	0:2a5dccfd318f	1	#include "DogLCD.h"
igorsk	0:2a5dccfd318f	2
igorsk	0:2a5dccfd318f	3	// macro to make sure x falls into range from low to high (inclusive)
igorsk	0:2a5dccfd318f	4	#define CLAMP(x, low, high) { if ( (x) < (low) ) x = (low); if ( (x) > (high) ) x = (high); } while (0);
igorsk	0:2a5dccfd318f	5
igorsk	0:2a5dccfd318f	6	void DogLCD::_send_commands(const unsigned char* buf, size_t size)
igorsk	0:2a5dccfd318f	7	{
igorsk	0:2a5dccfd318f	8	// for commands, A0 is low
igorsk	0:2a5dccfd318f	9	_spi.format(8,0);
igorsk	0:2a5dccfd318f	10	_spi.frequency(10000000);
igorsk	0:2a5dccfd318f	11	_cs = 0;
igorsk	0:2a5dccfd318f	12	_a0 = 0;
igorsk	0:2a5dccfd318f	13	while ( size-- > 0 )
igorsk	0:2a5dccfd318f	14	_spi.write(*buf++);
igorsk	0:2a5dccfd318f	15	_cs = 1;
igorsk	0:2a5dccfd318f	16	}
igorsk	0:2a5dccfd318f	17
igorsk	0:2a5dccfd318f	18	void DogLCD::_send_data(const unsigned char* buf, size_t size)
igorsk	0:2a5dccfd318f	19	{
igorsk	0:2a5dccfd318f	20	// for data, A0 is high
igorsk	0:2a5dccfd318f	21	_spi.format(8,0);
igorsk	0:2a5dccfd318f	22	_spi.frequency(10000000);
igorsk	0:2a5dccfd318f	23	_cs = 0;
igorsk	0:2a5dccfd318f	24	_a0 = 1;
igorsk	0:2a5dccfd318f	25	while ( size-- > 0 )
igorsk	0:2a5dccfd318f	26	_spi.write(*buf++);
igorsk	0:2a5dccfd318f	27	_cs = 1;
igorsk	0:2a5dccfd318f	28	_a0 = 0;
igorsk	0:2a5dccfd318f	29	}
igorsk	0:2a5dccfd318f	30
igorsk	0:2a5dccfd318f	31	// set column and page number
igorsk	0:2a5dccfd318f	32	void DogLCD::_set_xy(int x, int y)
igorsk	0:2a5dccfd318f	33	{
igorsk	0:2a5dccfd318f	34	//printf("_set_xy(%d,%d)\n", x, y);
igorsk	0:2a5dccfd318f	35	CLAMP(x, 0, LCDWIDTH-1);
igorsk	0:2a5dccfd318f	36	CLAMP(y, 0, LCDPAGES-1);
igorsk	0:2a5dccfd318f	37	unsigned char cmd[3];
igorsk	0:2a5dccfd318f	38	cmd[0] = 0xB0 \| (y&0xF);
igorsk	0:2a5dccfd318f	39	cmd[1] = 0x10 \| (x&0xF);
igorsk	0:2a5dccfd318f	40	cmd[2] = (x>>4)&0xF;
igorsk	0:2a5dccfd318f	41	_send_commands(cmd, 3);
igorsk	0:2a5dccfd318f	42	}
igorsk	0:2a5dccfd318f	43
igorsk	0:2a5dccfd318f	44	// initialize and turn on the display
igorsk	0:2a5dccfd318f	45	void DogLCD::init()
igorsk	0:2a5dccfd318f	46	{
igorsk	0:2a5dccfd318f	47	const unsigned char init_seq[] = {
igorsk	0:2a5dccfd318f	48	0x40, //Display start line 0
igorsk	0:2a5dccfd318f	49	0xa1, //ADC reverse
igorsk	0:2a5dccfd318f	50	0xc0, //Normal COM0...COM63
igorsk	0:2a5dccfd318f	51	0xa6, //Display normal
igorsk	0:2a5dccfd318f	52	0xa2, //Set Bias 1/9 (Duty 1/65)
igorsk	0:2a5dccfd318f	53	0x2f, //Booster, Regulator and Follower On
igorsk	0:2a5dccfd318f	54	0xf8, //Set internal Booster to 4x
igorsk	0:2a5dccfd318f	55	0x00,
igorsk	0:2a5dccfd318f	56	0x27, //Contrast set
igorsk	0:2a5dccfd318f	57	0x81,
igorsk	0:2a5dccfd318f	58	0x16,
igorsk	0:2a5dccfd318f	59	0xac, //No indicator
igorsk	0:2a5dccfd318f	60	0x00,
igorsk	0:2a5dccfd318f	61	0xaf, //Display on
igorsk	0:2a5dccfd318f	62	};
igorsk	0:2a5dccfd318f	63	//printf("Reset=L\n");
igorsk	0:2a5dccfd318f	64	_reset = 0;
igorsk	0:2a5dccfd318f	65	//printf("Power=H\n");
igorsk	0:2a5dccfd318f	66	_power = 1;
igorsk	0:2a5dccfd318f	67	//wait_ms(1);
igorsk	0:2a5dccfd318f	68	//printf("Reset=H\n");
igorsk	0:2a5dccfd318f	69	_reset = 1;
igorsk	0:2a5dccfd318f	70	//wait(5);
igorsk	0:2a5dccfd318f	71	//printf("Sending init commands\n");
igorsk	0:2a5dccfd318f	72	_send_commands(init_seq, sizeof(init_seq));
igorsk	0:2a5dccfd318f	73	}
igorsk	0:2a5dccfd318f	74
igorsk	0:2a5dccfd318f	75	void DogLCD::send_pic(const unsigned char* data)
igorsk	0:2a5dccfd318f	76	{
igorsk	0:2a5dccfd318f	77	//printf("Sending picture\n");
igorsk	0:2a5dccfd318f	78	for (int i=0; i<LCDPAGES; i++)
igorsk	0:2a5dccfd318f	79	{
igorsk	0:2a5dccfd318f	80	_set_xy(0, i);
igorsk	0:2a5dccfd318f	81	_send_data(data + i*LCDWIDTH, LCDWIDTH);
igorsk	0:2a5dccfd318f	82	}
igorsk	0:2a5dccfd318f	83	}
igorsk	0:2a5dccfd318f	84
igorsk	0:2a5dccfd318f	85	void DogLCD::clear_screen()
igorsk	0:2a5dccfd318f	86	{
igorsk	0:2a5dccfd318f	87	//printf("Clear screen\n");
igorsk	0:2a5dccfd318f	88	memset(_framebuffer, 0, sizeof(_framebuffer));
igorsk	0:2a5dccfd318f	89	if ( _updating == 0 )
igorsk	0:2a5dccfd318f	90	{
igorsk	0:2a5dccfd318f	91	send_pic(_framebuffer);
igorsk	0:2a5dccfd318f	92	}
igorsk	0:2a5dccfd318f	93	}
igorsk	0:2a5dccfd318f	94
igorsk	0:2a5dccfd318f	95	void DogLCD::all_on(bool on)
igorsk	0:2a5dccfd318f	96	{
igorsk	0:2a5dccfd318f	97	//printf("Sending all on %d\n", on);
igorsk	0:2a5dccfd318f	98	unsigned char cmd = 0xA4 \| (on ? 1 : 0);
igorsk	0:2a5dccfd318f	99	_send_commands(&cmd, 1);
igorsk	0:2a5dccfd318f	100	}
igorsk	0:2a5dccfd318f	101
igorsk	0:2a5dccfd318f	102	void DogLCD::pixel(int x, int y, int colour)
igorsk	0:2a5dccfd318f	103	{
igorsk	0:2a5dccfd318f	104	CLAMP(x, 0, LCDWIDTH-1);
igorsk	0:2a5dccfd318f	105	CLAMP(y, 0, LCDHEIGHT-1);
igorsk	0:2a5dccfd318f	106	int page = y / 8;
igorsk	0:2a5dccfd318f	107	unsigned char mask = 1<<(y%8);
igorsk	0:2a5dccfd318f	108	unsigned char byte = &_framebuffer[pageLCDWIDTH + x];
igorsk	0:2a5dccfd318f	109	if ( colour == 0 )
igorsk	0:2a5dccfd318f	110	*byte &= ~mask; // clear pixel
igorsk	0:2a5dccfd318f	111	else
igorsk	0:2a5dccfd318f	112	*byte \|= mask; // set pixel
igorsk	0:2a5dccfd318f	113	if ( !_updating )
igorsk	0:2a5dccfd318f	114	{
igorsk	0:2a5dccfd318f	115	_set_xy(x, page);
igorsk	0:2a5dccfd318f	116	_send_data(byte, 1);
igorsk	0:2a5dccfd318f	117	}
igorsk	0:2a5dccfd318f	118	}
igorsk	0:2a5dccfd318f	119
igorsk	0:2a5dccfd318f	120	void DogLCD::fill(int x, int y, int width, int height, int colour)
igorsk	0:2a5dccfd318f	121	{
igorsk	0:2a5dccfd318f	122	/*
igorsk	0:2a5dccfd318f	123	If we need to fill partial pages at the top:
igorsk	0:2a5dccfd318f	124
igorsk	0:2a5dccfd318f	125	......+---+---+.....
igorsk	0:2a5dccfd318f	126	^ \| = \| = \| = : don't touch
igorsk	0:2a5dccfd318f	127	\| \| = \| = \| * : update
igorsk	0:2a5dccfd318f	128	y%8 \| = \| = \|
igorsk	0:2a5dccfd318f	129	\| \| = \| = \|
igorsk	0:2a5dccfd318f	130	v \| = \| = \|
igorsk	0:2a5dccfd318f	131	y----> \| * \| * \|
igorsk	0:2a5dccfd318f	132	\| * \| * \|
igorsk	0:2a5dccfd318f	133	\| * \| * \|
igorsk	0:2a5dccfd318f	134	+---+---+
igorsk	0:2a5dccfd318f	135	*/
igorsk	0:2a5dccfd318f	136	//printf("fill(x=%d, y=%d, width=%d, height=%d, colour=%x)\n", x, y, width, height, colour);
igorsk	0:2a5dccfd318f	137	CLAMP(x, 0, LCDWIDTH-1);
igorsk	0:2a5dccfd318f	138	CLAMP(y, 0, LCDHEIGHT-1);
igorsk	0:2a5dccfd318f	139	CLAMP(width, 0, LCDWIDTH - x);
igorsk	0:2a5dccfd318f	140	CLAMP(height, 0, LCDHEIGHT - y);
igorsk	0:2a5dccfd318f	141	int page = y/8;
igorsk	0:2a5dccfd318f	142	int firstpage = page;
igorsk	0:2a5dccfd318f	143	int partpage = y%8;
igorsk	0:2a5dccfd318f	144	if ( partpage != 0 )
igorsk	0:2a5dccfd318f	145	{
igorsk	0:2a5dccfd318f	146	// we need to process partial bytes in the top page
igorsk	0:2a5dccfd318f	147	unsigned char mask = (1<<partpage) - 1; // this mask has 1s for bits we need to leave
igorsk	0:2a5dccfd318f	148	unsigned char bytes = &_framebuffer[pageLCDWIDTH + x];
igorsk	0:2a5dccfd318f	149	for ( int i = 0; i < width; i++, bytes++ )
igorsk	0:2a5dccfd318f	150	{
igorsk	0:2a5dccfd318f	151	// clear "our" bits
igorsk	0:2a5dccfd318f	152	*bytes &= mask;
igorsk	0:2a5dccfd318f	153	if ( colour != 0 )
igorsk	0:2a5dccfd318f	154	*bytes \|= ~mask; // set our bits
igorsk	0:2a5dccfd318f	155	}
igorsk	0:2a5dccfd318f	156	height -= partpage;
igorsk	0:2a5dccfd318f	157	page++;
igorsk	0:2a5dccfd318f	158	}
igorsk	0:2a5dccfd318f	159	while ( height >= 8 )
igorsk	0:2a5dccfd318f	160	{
igorsk	0:2a5dccfd318f	161	memset(&_framebuffer[page*LCDWIDTH + x], colour == 0 ? 0 : 0xFF, width);
igorsk	0:2a5dccfd318f	162	page++;
igorsk	0:2a5dccfd318f	163	height -= 8;
igorsk	0:2a5dccfd318f	164	}
igorsk	0:2a5dccfd318f	165	if ( height != 0 )
igorsk	0:2a5dccfd318f	166	{
igorsk	0:2a5dccfd318f	167	// we need to process partial bytes in the bottom page
igorsk	0:2a5dccfd318f	168	unsigned char mask = ~((1<<partpage) - 1); // this mask has 1s for bits we need to leave
igorsk	0:2a5dccfd318f	169	unsigned char bytes = &_framebuffer[pageLCDWIDTH + x];
igorsk	0:2a5dccfd318f	170	for ( int i = 0; i < width; i++, bytes++ )
igorsk	0:2a5dccfd318f	171	{
igorsk	0:2a5dccfd318f	172	// clear "our" bits
igorsk	0:2a5dccfd318f	173	*bytes &= mask;
igorsk	0:2a5dccfd318f	174	if ( colour != 0 )
igorsk	0:2a5dccfd318f	175	*bytes \|= ~mask; // set our bits
igorsk	0:2a5dccfd318f	176	}
igorsk	0:2a5dccfd318f	177	page++;
igorsk	0:2a5dccfd318f	178	}
igorsk	0:2a5dccfd318f	179	//printf("_updating=%d\n", _updating);
igorsk	0:2a5dccfd318f	180	if ( !_updating )
igorsk	0:2a5dccfd318f	181	{
igorsk	0:2a5dccfd318f	182	int laststpage = page;
igorsk	0:2a5dccfd318f	183	for ( page = firstpage; page < laststpage; page++)
igorsk	0:2a5dccfd318f	184	{
igorsk	0:2a5dccfd318f	185	//printf("setting x=%d, page=%d\n", x, page);
igorsk	0:2a5dccfd318f	186	_set_xy(x, page);
igorsk	0:2a5dccfd318f	187	//printf("sending %d bytes at offset %x\n", width, page*LCDWIDTH + x);
igorsk	0:2a5dccfd318f	188	_send_data(&_framebuffer[page*LCDWIDTH + x], width);
igorsk	0:2a5dccfd318f	189	}
igorsk	0:2a5dccfd318f	190	}
igorsk	0:2a5dccfd318f	191	}
igorsk	0:2a5dccfd318f	192
igorsk	0:2a5dccfd318f	193	void DogLCD::beginupdate()
igorsk	0:2a5dccfd318f	194	{
igorsk	0:2a5dccfd318f	195	_updating++;
igorsk	0:2a5dccfd318f	196	//printf("beginupdate: %d\n", _updating);
igorsk	0:2a5dccfd318f	197	}
igorsk	0:2a5dccfd318f	198
igorsk	0:2a5dccfd318f	199	void DogLCD::endupdate()
igorsk	0:2a5dccfd318f	200	{
igorsk	0:2a5dccfd318f	201	_updating--;
igorsk	0:2a5dccfd318f	202	//printf("endupdate: %d\n", _updating);
igorsk	0:2a5dccfd318f	203	if ( _updating == 0 )
igorsk	0:2a5dccfd318f	204	{
igorsk	0:2a5dccfd318f	205	send_pic(_framebuffer);
igorsk	0:2a5dccfd318f	206	}
igorsk	0:2a5dccfd318f	207	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Jan 2010
Imports:	199
Forks:	2
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	4

LCD/DogLCD.cpp@0:2a5dccfd318f, 2010-01-14 (annotated)

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