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Examples of library implementation on various hardware configurations have been added. 1. ATMEGA328P_ARDUINO_UNO_R3 2. STM32G071RB_NUCLEO_BARE_METAL 3. STM32G071RB_NUCLEO_BARE_METAL
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| #define ON 1 | ||
| #define OFF 0 | ||
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| #define DEBUG_CONSOLE ON | ||
| #define DEBUG_CONSOLE OFF | ||
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| #ifdef __cplusplus | ||
| } | ||
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| /* | ||
| * @Author: lukasz.niewelt | ||
| * @Date: 2023-12-04 20:13:23 | ||
| * @Last Modified by: lukasz.niewelt | ||
| * @Last Modified time: 2023-12-08 10:49:44 | ||
| */ | ||
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| // #include "lcd_hd44780_config.h" | ||
| #include "lcd_hd44780_interface.h" | ||
| #include "lcd_hd44780_config.h" | ||
| #include <stdio.h> | ||
| #include <avr/io.h> | ||
| #include <util/delay.h> | ||
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| #define LCD_DATA_PORT PORTD | ||
| #define LCD_DATA_PORT_DIR DDRD | ||
| #define LCD_DATA_INPUT PIND | ||
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| #define LCD_SIG_PORT PORTB | ||
| #define LCD_SIG_PORT_DIR DDRB | ||
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| #define LCD_BCKL_PORT PORTB | ||
| #define LCD_BCKL_PORT_DIR DDRB | ||
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| #define LCD_PIN_D7 (1 << PIND7) | ||
| #define LCD_PIN_D6 (1 << PIND6) | ||
| #define LCD_PIN_D5 (1 << PIND5) | ||
| #define LCD_PIN_D4 (1 << PIND4) | ||
| #define LCD_PIN_RS (1 << PINB0) | ||
| #define LCD_PIN_RW (1 << PINC1) | ||
| #define LCD_PIN_E (1 << PINB1) | ||
| #define LCD_BCKL_PIN (1 << PINB5) | ||
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| #define LCD_D4_MASK 0x01 | ||
| #define LCD_D5_MASK 0x02 | ||
| #define LCD_D6_MASK 0x04 | ||
| #define LCD_D7_MASK 0x08 | ||
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| static void init_LCD_data_and_SIG_pins(void); | ||
| static void init_LCD_DATA_PINS_as_outputs(void); | ||
| static void init_LCD_DATA_PINS_as_inputs(void); | ||
| static void set_LCD_DATA_PINS_state(uint8_t data); | ||
| static uint8_t get_LCD_DATA_PINS_state(void); | ||
| static void init_LCD_SIGNAL_PINS_as_outputs(void); | ||
| static void LCD_set_SIG(enum lcd_sig LCD_SIG); | ||
| static void LCD_reset_SIG(enum lcd_sig LCD_SIG); | ||
| static void wraper_delay_us(uint32_t delay_us); | ||
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| /************LCD_IO_driver_interface implementation START**************/ | ||
| static const struct LCD_IO_driver_interface_struct LCD_IO_driver = { | ||
| init_LCD_data_and_SIG_pins, | ||
| init_LCD_DATA_PINS_as_outputs, | ||
| init_LCD_DATA_PINS_as_inputs, | ||
| set_LCD_DATA_PINS_state, | ||
| get_LCD_DATA_PINS_state, | ||
| init_LCD_SIGNAL_PINS_as_outputs, | ||
| LCD_set_SIG, | ||
| LCD_reset_SIG, | ||
| wraper_delay_us, | ||
| }; | ||
| const struct LCD_IO_driver_interface_struct *LCD_IO_driver_interface_get(void) | ||
| { | ||
| return &LCD_IO_driver; | ||
| } | ||
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| /*************LCD_IO_driver_interface implementation END***************/ | ||
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| static void init_LCD_data_and_SIG_pins(void) | ||
| { | ||
| //set BCKL PIN as output | ||
| LCD_BCKL_PORT_DIR |= LCD_BCKL_PIN; | ||
| //enable Backlight of the LCD | ||
| LCD_BCKL_PORT |= LCD_BCKL_PIN; | ||
| init_LCD_DATA_PINS_as_outputs(); | ||
| init_LCD_SIGNAL_PINS_as_outputs(); | ||
| } | ||
| static void init_LCD_DATA_PINS_as_outputs(void) | ||
| { | ||
| //set pins as output | ||
| LCD_DATA_PORT_DIR |= (LCD_PIN_D4 | LCD_PIN_D5 | LCD_PIN_D6 | LCD_PIN_D7); | ||
| } | ||
| static void init_LCD_DATA_PINS_as_inputs(void) | ||
| { | ||
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| //set pins as inputs | ||
| LCD_DATA_PORT_DIR &= ~(LCD_PIN_D4 | LCD_PIN_D5 | LCD_PIN_D6 | LCD_PIN_D7); | ||
| // enable pull-up on input pins | ||
| LCD_DATA_PORT |= (LCD_PIN_D4 | LCD_PIN_D5 | LCD_PIN_D6 | LCD_PIN_D7); | ||
| } | ||
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| static void set_LCD_DATA_PINS_state(uint8_t data) | ||
| { | ||
| if ((data & LCD_D4_MASK)) | ||
| LCD_DATA_PORT |= LCD_PIN_D4; | ||
| else | ||
| LCD_DATA_PORT &= ~LCD_PIN_D4; | ||
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| if ((data & LCD_D5_MASK)) | ||
| LCD_DATA_PORT |= LCD_PIN_D5; | ||
| else | ||
| LCD_DATA_PORT &= ~LCD_PIN_D5; | ||
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| if ((data & LCD_D6_MASK)) | ||
| LCD_DATA_PORT |= LCD_PIN_D6; | ||
| else | ||
| LCD_DATA_PORT &= ~LCD_PIN_D6; | ||
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| if ((data & LCD_D7_MASK)) | ||
| LCD_DATA_PORT |= LCD_PIN_D7; | ||
| else | ||
| LCD_DATA_PORT &= ~LCD_PIN_D7; | ||
| } | ||
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| static uint8_t get_LCD_DATA_PINS_state(void) | ||
| { | ||
| uint8_t data = 0; | ||
| if (LCD_DATA_INPUT & LCD_PIN_D4) | ||
| data = LCD_D4_MASK; | ||
| if (LCD_DATA_INPUT & LCD_PIN_D5) | ||
| data |= LCD_D5_MASK; | ||
| if (LCD_DATA_INPUT & LCD_PIN_D6) | ||
| data |= LCD_D6_MASK; | ||
| if (LCD_DATA_INPUT & LCD_PIN_D7) | ||
| data |= LCD_D7_MASK; | ||
| return data; | ||
| } | ||
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| static void init_LCD_SIGNAL_PINS_as_outputs(void) | ||
| { | ||
| #if USE_RW_PIN == ON | ||
| LCD_SIG_PORT_DIR |= (LCD_PIN_RS | LCD_PIN_RW | LCD_PIN_E); | ||
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| #else | ||
| LCD_SIG_PORT_DIR |= (LCD_PIN_RS | LCD_PIN_E); | ||
| #endif | ||
| } | ||
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| static void LCD_set_SIG(enum lcd_sig LCD_SIG) | ||
| { | ||
| switch (LCD_SIG) | ||
| { | ||
| case LCD_RS: | ||
| LCD_SIG_PORT |= LCD_PIN_RS; | ||
| break; | ||
| case LCD_E: | ||
| LCD_SIG_PORT |= LCD_PIN_E; | ||
| break; | ||
| #if USE_RW_PIN == ON | ||
| case LCD_RW: | ||
| LCD_SIG_PORT |= LCD_PIN_RW; | ||
| break; | ||
| #endif | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
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| static void LCD_reset_SIG(enum lcd_sig LCD_SIG) | ||
| { | ||
| switch (LCD_SIG) | ||
| { | ||
| case LCD_RS: | ||
| LCD_SIG_PORT &= ~LCD_PIN_RS; | ||
| break; | ||
| case LCD_E: | ||
| LCD_SIG_PORT &= ~LCD_PIN_E; | ||
| break; | ||
| #if USE_RW_PIN == ON | ||
| case LCD_RW: | ||
| LCD_SIG_PORT &= ~LCD_PIN_RW; | ||
| break; | ||
| #endif | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
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| void wraper_delay_us(uint32_t delay_us) | ||
| { | ||
| _delay_us((double)(delay_us)); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <stdbool.h> | ||
| #include <avr/io.h> | ||
| #include <util/delay.h> | ||
| #include <string.h> | ||
| #include "project_config.h" | ||
| #if DEBUG_CONSOLE == ON | ||
| #include "debug.h" | ||
| #endif | ||
| #include "lcd_hd44780.h" | ||
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| #define SHIFT_DELAY 400 | ||
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| const char *demo_tekst = {"Congratulation, you have just run LCD demo example."}; | ||
| const char *demo_title = {"LCD HD44780 Demo"}; | ||
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| static void lcd_buf_slide_str_in(const char *str, enum LCD_LINES lcd_line, uint16_t speed); | ||
| static void lcd_buf_slide_str_out(const char *str, enum LCD_LINES lcd_line, uint16_t speed); | ||
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| uint8_t j = 0; | ||
| uint8_t i = 0; | ||
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| int main(void) | ||
| { | ||
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| #if DEBUG_CONSOLE == ON | ||
| // Init the debug UART allowing us to use `printf` | ||
| debug_console_init(); | ||
| #endif | ||
| lcd_init(); | ||
| lcd_buf_str(demo_title); | ||
| lcd_update(); | ||
| while (1) | ||
| { | ||
| lcd_buf_slide_str_in(demo_tekst, LINE_2, SHIFT_DELAY); | ||
| lcd_buf_slide_str_out(demo_tekst, LINE_2, SHIFT_DELAY); | ||
| } | ||
| return 0; | ||
| } | ||
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| void lcd_buf_slide_str_out(const char *str, enum LCD_LINES lcd_line, uint16_t speed) | ||
| { | ||
| uint8_t str_end_flag = 0; | ||
| for (j = 0; j <= strlen(str); j++) | ||
| { | ||
| _delay_ms(speed); | ||
| lcd_buf_locate(lcd_line, C1); | ||
| for (i = 0; i < LCD_X; i++) | ||
| { | ||
| if ((str[j + i] != '\0') && (str_end_flag == 0)) | ||
| { | ||
| lcd_buf_char(str[j + i]); | ||
| } | ||
| else | ||
| { | ||
| str_end_flag = 0xFF; | ||
| lcd_buf_char(' '); | ||
| } | ||
| } | ||
| str_end_flag = 0; | ||
| lcd_update(); | ||
| } | ||
| } | ||
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| void lcd_buf_slide_str_in(const char *str, enum LCD_LINES lcd_line, uint16_t speed) | ||
| { | ||
| for (i = LCD_X - 1; i > C1; i--) | ||
| { | ||
| _delay_ms(speed); | ||
| lcd_buf_locate(lcd_line, i); | ||
| for (uint8_t j = 0; j < (LCD_X - i); j++) | ||
| { | ||
| lcd_buf_char(str[j]); | ||
| } | ||
| lcd_update(); | ||
| } | ||
| } |
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