/**
* @brief send a command to LCD display
* @param uint8_t command
* @retval None
*/
void lcd_send_command(uint8_t command)
{
GPIO_ResetBits(LCD_GPIO, LCD_PINS);
lcd_set_data(command);
GPIO_ResetBits(LCD_GPIO, LCD_RS);
GPIO_SetBits(LCD_GPIO, LCD_EN);
osDelay(1);
GPIO_ResetBits(LCD_GPIO, LCD_EN);
osDelay(2);
}
/**
* @brief display a character on the LCD display
* @param uint8_t character
* @retval None
*/
void lcd_send_character(uint8_t character)
{
GPIO_ResetBits(LCD_GPIO, LCD_PINS);
lcd_set_data(character);
GPIO_SetBits(LCD_GPIO, LCD_RS);
GPIO_SetBits(LCD_GPIO, LCD_EN);
osDelay(1);
GPIO_ResetBits(LCD_GPIO, LCD_EN);
osDelay(1);
}
// generic send
void lcd_send(uint8_t data, uint8_t type) {
lcd_busy_wait();
if (type) {
lcd_set_data();
} else {
lcd_set_instruction();
}
lcd_set_write();
lcd_set_enable_on();
lcd_set_port_write();
lcd_write(data);
LCD_DELAY;
LCD_DELAY;
lcd_set_enable_off();
}
// generic get
uint8_t lcd_get(uint8_t type) {
uint8_t data;
lcd_busy_wait();
lcd_set_port_read();
lcd_write(0xFF);
if (type) {
lcd_set_data();
} else {
lcd_set_instruction();
}
lcd_set_read();
lcd_set_enable_on();
LCD_DELAY;
LCD_DELAY;
data = lcd_read();
lcd_set_enable_off();
return data;
}
static void lcd_putchar (lcd_t *lcd, short c)
{
int i;
switch (lcd->esc_mode) {
case 0:
if (! lcd->unicode_char) {
switch (c) {
case '\n':
if (lcd->new_line) {
lcd->new_line = 0;
return;
}
for (i = lcd->col; i < 20; ++i)
lcd_set_data (lcd, ' ');
//lcd->line = (lcd->line + 1) & 3;
//lcd_set_line (lcd, lcd->line);
return;
case '\t': /* tab replaced by space */
c = ' ';
break;
case '\r': /* carriage return - go to begin of line */
lcd_set_line (lcd, lcd->line);
return;
case '\33':
lcd->esc_mode = 1;
return;
case '&':
c = 0xB0;
break;
case 0xD0:
case 0xD1:
lcd->unicode_char = c;
return;
}
} else {
c = translate_russian (lcd, c);
lcd->unicode_char = 0;
}
break;
case 1:
if (c == '[') {
lcd->esc_mode = 2;
return;
} else {
lcd->esc_mode = 0;
}
break;
case 2:
if (c == 'H') {
lcd_command (LCD_CMD_CURSOR_HOME);
lcd->line = 0;
lcd->col = 0;
lcd->esc_mode = 0;
return;
} else if (c == '2') {
lcd->esc_mode = 3;
lcd->esc_buf = c;
return;
} else {
lcd_set_data (lcd, '[');
lcd->esc_mode = 0;
}
break;
case 3:
if (c == 'J') {
lcd_command (LCD_CMD_CLEAR_DISPLAY);
lcd->line = 0;
lcd->col = 0;
lcd->esc_mode = 0;
return;
} else {
lcd_set_data (lcd, '[');
lcd_set_data (lcd, lcd->esc_buf);
lcd->esc_mode = 0;
}
break;
default:
lcd->esc_mode = 0;
break;
}
lcd_set_data (lcd, c);
}