114 lines
1.9 KiB
C
114 lines
1.9 KiB
C
/*
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* Author: Jake Goodwin
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* Date: 2022
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* Description: Interfacing with a 1602LCD only with the uc no perifs
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*/
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/sleep.h>
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#include <util/delay.h>
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#define RS_PORT PORTD
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#define RS_PIN PIND0
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#define RS_DDR DDD0
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#define RW_PORT PORTD
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#define RW_PIN PIND1
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#define RW_DDR DDD1
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#define ENA_PORT PORTD
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#define ENA_PIN PIND2
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#define ENA_DDR DDD2
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#define BIT4_PORT PORTD
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#define BIT4_PIN PIND3
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#define BIT4_DDR DDD3
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#define BIT5_PORT PORTD
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#define BIT5_PIN PIND4
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#define BIT5_DDR DDD4
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#define BIT6_PORT PORTD
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#define BIT6_PIN PIND5
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#define BIT6_DDR DDD5
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#define BIT7_PORT PORTD
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#define BIT7_PIN PIND6
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#define BIT7_DDR DDD6
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#define LED_PIN PINC0
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#define LED_PORT PORTC
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#define LED_DDR DDC0
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//LCD CONNECTIONS
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//PIND0 RS, H: data input L: Instruction input
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//PIND1 RW, H: read L: write
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//PIND2 ENABLE, Enable signal
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//PIND3 BIT4
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//PIND4 BIT5
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//PIND5 BIT6
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//PIND6 BIT7
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//#############################
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//FUNCTIONS
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//#############################
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void init_lcd(void) {
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DDRD |= (1<<RS_DDR)|(1<<RW_DDR)|(1<<ENA_DDR)|
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(1<<BIT4_PIN)|(1<<BIT5_PIN)|(1<<BIT6_PIN)|(1<<BIT7_PIN);
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_delay_ms(40);
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PORTD = (0<<RS_PIN)|(0<<RW_PIN)|(0<<ENA_PIN)|
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(1<<BIT4_PIN)|(1<<BIT5_PIN)|(0<<BIT6_PIN)|(1<<BIT7_PIN);
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_delay_ms_(5);
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PORTD = (0<<RS_PIN)|(0<<RW_PIN)|(0<<ENA_PIN)|
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(1<<BIT4_PIN)|(1<<BIT5_PIN)|(0<<BIT6_PIN)|(1<<BIT7_PIN);
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_delay_ms(1);
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}
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void cmd_lcd() {
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;
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}
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/*
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* Input: None
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* Output: None
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* Description: Toggles the pin for the LED indicator.
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*/
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static void led_blink(void) {
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//Set the DDR for output.
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DDRC |= (1<<LED_PIN);
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PORTC ^= (1<<LED_PIN);
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_delay_ms(250);
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PORTC ^= (1<<LED_PIN);
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_delay_ms(250);
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}
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int main() {
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//SETUP HERE.
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init_lcd();
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while(1) {
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led_blink();
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test_lcd();
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_delay_ms(1000);
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off_lcd();
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}
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return 0;
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}
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