/*!
* \brief Rewrite all LCD content
*
* \param *dta Pointer to the memory
*
*/
void LCD_write_all(uint8_t *dta)
{
uint8_t i,j;
for (i = 0; i < 4; i++) {
/* Set line */
switch (i) {
case 0: LCD_sendcmd(LCD_EN1 | 0x80); break;
case 1: LCD_sendcmd(LCD_EN1 | 0xc0); break;
case 2: LCD_sendcmd(LCD_EN2 | 0x80); break;
case 3: LCD_sendcmd(LCD_EN2 | 0xc0); break;
}
for (j = 0; j < 40; j++) {
/* ** Do you have some other data ? */
if (!*dta) {
j = 40;
i = 5;
}
else {
/* <N> ** Is it <ENTER> ? */
if (*dta == '\n') {
j = 40;
}
else {
/* ** Is it first or second line ? */
if (i <3)
LCD_senddata(LCD_EN1 | *dta); /* Send data to first or second line */
else
LCD_senddata(LCD_EN2 | *dta); /* Send data to fird or fourht line */
}
}
dta++;
}
}
}
/*!
* \brief Initializing LCD by Instruction - 4-bit initialization
*/
void LCD_init(void)
{
_delay_ms(30); /* power on delay - wait more than 30 ms */
LCD_write(0); /* set RS, RW and EN low */
LCD_write( P_LCD_EN1 | P_LCD_EN2 | 0x30 ); /* lcd enable high */
LCD_write( 0x30 ); /* lcd enable low */
_delay_ms(5); /* wait 5 ms */
LCD_write( P_LCD_EN1 | P_LCD_EN2 | 0x30 ); /* lcd enable high */
LCD_write( 0x30 ); /* lcd enable low */
_delay_us(100); /* wait more than 100us */
LCD_write( P_LCD_EN1 | P_LCD_EN2 | 0x30 ); /* lcd enable high */
LCD_write( 0x30 ); /* lcd enable low */
_delay_us(100); /* wait more than 100us */
LCD_write( P_LCD_EN1 | P_LCD_EN2 | 0x20 ); /* lcd enable high */
LCD_write( 0x20 ); /* lcd enable low */
_delay_us(100); /* wait more than 100us */
LCD_sendcmd(LCD_EN1| LCD_EN2 | 0x28); /* 4 bit mode, 1/16 duty, 5x8 font */
LCD_sendcmd(LCD_EN1| LCD_EN2 | 0x08); /* display off */
LCD_sendcmd(LCD_EN1| LCD_EN2 | 0x01); /* display clear */
LCD_sendcmd(LCD_EN1| LCD_EN2 | 0x06); /* entry mode */
LCD_sendcmd(LCD_EN1| LCD_EN2 | 0x0f); /* display on, cursor off, blinking cursor off */
}
/*!
* \brief Pre-set one CGRAM character
*
* \param char_val Number of char. Only 0 - 7 are permitted.
* \param *char_buf Pointer to the memory on the first microline
*
*/
void LCD_wr_cgram(uint8_t char_val, const uint8_t *char_buf )
{ uint8_t i = 8;
char_val <<= 3;
LCD_sendcmd(LCD_EN1 | LCD_EN2 | cmd_set_cgram_addr | char_val );
while(i--) LCD_senddata( LCD_EN1 | LCD_EN2 | *char_buf++ );
LCD_sendcmd(LCD_EN1 | LCD_EN2 | cmd_set_ddram_addr);
}
/**
* @brief Loads czech character into LCD slot.
* @param czech_char_id - identification of czech character
* @param lcd_slot_id - identification of lcd slot
*/
static void lcd_load_cz_char(uint8_t cz_char_id, uint8_t lcd_slot_id)
{
LCD_sendcmd(LCD_EN1| cmd_set_cgram_addr | (lcd_slot_id << 3) );
uint8_t i = 0;
for (i=0; i < 8; i++)
{
LCD_senddata(LCD_EN1 | cz_char_cgrom[cz_char_id][i]);
}
LCD_sendcmd(LCD_EN1 | cmd_set_ddram_addr);
LCD_cursor_yx(coord.y+1,coord.x);
}
/*!
* \brief Putchar for fprintf
* Send character c to the LCD display. After a '\1' set cursor to first line, '\2' set cursor to secound line,
* '\3' set cursor to third line, '\4' set cursor to fourth line, '\5' clear display.
* the next character will first clear the display.
*
* \param c input char
* \param FILE * output FILE
*
* \return status output status
*
*/
uint16_t lcd_putchar(uint8_t c, FILE *unused)
{
static uint8_t line = 1;
if (c == 1) {
LCD_cursor_yx(1,1); /* Set cursor to first line */
line = 1;
}
else if (c == 2) {
LCD_cursor_yx(2,1); /* Set cursor to second line */
line = 2;
}
else if (c == 3) {
LCD_cursor_yx(3,1); /* Set cursor to third line */
line = 3;
}
else if (c == 4) {
LCD_cursor_yx(4,1); /* Set cursor to fourth line */
line = 4;
}
else if (c == 5) {
LCD_sendcmd(LCD_EN1 | LCD_EN2 | 0x1); /* Clear both displays */
line = 1;
}
else if (c == '\n') { /* Set cursor to next line */
LCD_cursor_yx(((++line < 5) ? line : (line = 1)),1);
}
else LCD_senddata(((line <3) ? LCD_EN1 : LCD_EN2) | c); /* Send data to LCD */
return 0;
}
/*!
* M A I N
*
*/
int main(void) {
uint16_t poc = 0;
uint8_t i,j;
uint8_t dir;
uint8_t tmp;
LCD_init(); /* Initialize display */
LCD_wr_cgram(0,&cgrom_p[0]); /* Program first char in CG-RAM */
LCD_sendcmd(LCD_EN1 | LCD_EN2 | 0xc); /* Disable cursors */
for (i = 1; i < 5; i++) /* Fill display with pattern */
for (j = 1; j < 41; j++) {
LCD_cursor_yx(i,j);
LCD_senddata(((i <3) ? LCD_EN1 : LCD_EN2)| 0);
_delay_ms(100);
}
LCD_sendcmd(LCD_EN1 | LCD_EN2 | 0x1); /* Clear display */
i = 1; j = 1;
dir = 0;
do{
LCD_cursor_yx(i,j); /* Display figure */
LCD_senddata(((i <3) ? LCD_EN1 : LCD_EN2)| 0);
for (tmp = 0; tmp < 20; tmp++)
_delay_ms(10); /* Wait for while */
LCD_cursor_yx(i,j);
LCD_senddata(((i <3) ? LCD_EN1 : LCD_EN2)| ' '); /* Clear figure */
switch(dir) { /* State machine - direction control */
case 0: j++;
if (j == 40) dir = 1; /* Right */
break;
case 1: i++;
if (i == 4) dir = 2; /* Down */
break;
case 2: j--;
if (j == 1) dir = 3; /* Left */
break;
case 3: i--;
if (i == 1) dir =0; /* Up */
break;
}
} while(1);
}
/*!
* \brief Send one digit to LCD
*
* \param pos start position
* \param val value (only number)
*
*/
void LCD_write_big_num(uint8_t pos, uint8_t val)
{
uint8_t i,j;
for (i = 0; i <4; i++) {
switch (i) {
case 0: LCD_sendcmd(LCD_EN1 | (0x80 + pos)); break;
case 1: LCD_sendcmd(LCD_EN1 | (0xc0 + pos)); break;
case 2: LCD_sendcmd(LCD_EN2 | (0x80 + pos)); break;
case 3: LCD_sendcmd(LCD_EN2 | (0xc0 + pos)); break;
}
for (j = 0; j < 4; j++) {
if (i <2)
LCD_senddata(LCD_EN1 | big_number[val][4*i+j]);
else
LCD_senddata(LCD_EN2 | big_number[val][4*i+j]);
}
}
}
/*!
* \brief Set cursor on LCD
*
* \param row Row (1-4)
* \param column Column (1-40)
*
*/
void LCD_cursor_yx(uint8_t row, uint8_t column ) {
uint16_t i;
column--;
switch( row ) {
case 1 : i = (0x80 + column) | LCD_EN1; break;
case 2 : i = (0xc0 + column) | LCD_EN1; break;
case 3 : i = (0x80 + column) | LCD_EN2; break;
case 4 : i = (0xc0 + column) | LCD_EN2; break;
default: i = (0x80 + column) | LCD_EN1 | LCD_EN2; break;
}
LCD_sendcmd( i );
}
/*!
* M A I N
*
*/
int main(void) {
uint16_t poc = 0;
uint8_t i;
LCD_init(); /* Initialize display */
LCD_sendcmd(LCD_EN1 | LCD_EN2 | 0xc); /* Switch off cursor */
stderr = &lcd_str; /* Set FILE stderr */
while (1) {
fprintf(stderr, "\1 First line -> Cnt %d .\n",poc++);
fprintf(stderr, "\2 Second line\n");
fprintf(stderr, " Next line");
fprintf(stderr, "\4 Fourth line");
for (i = 0; i < 10; i++)
_delay_ms(50);
if (!(poc % 10))
fprintf(stderr, "\5 Clear disp.");
}
return(0);
}
inline void Max_LCD::command(uint8_t value) {
LCD_sendcmd(value);
delayMicroseconds(100);
}