ATMEGA128, CodeVisonAVR, TWI, I2C, LCD1602

ATMEGA128, CodeVisonAVR, TWI, I2C, LCD1602

TWI ( I2C ) 포트를 통해 LCD1602 모듈을 제어합니다.

디버깅 메시지를 위해 UART0 포트를 사용하였습니다.

PORTE.0 : UART RXD0
PORTE.1 : UART TXD0
PORTD.0 : TWI Serial Clock
PORTD.1 : TWI Serial Data

0. 참고 자료

• https://embedds.com/programming-avr-i2c-interface/
• http://artoa.hanbat.ac.kr/lecture_data/microprocessor/2014/%EC%A0%9C11%EC%9E%A5%20%EC%8B%9C%EB%A6%AC%EC%96%BC%20%EC%9D%B8%ED%84%B0%ED%8E%98%EC%9D%B4%EC%8A%A4%20(HBE-MCU-Multi%20AVR).pdf
• http://electronicsdo.tistory.com/entry/I2C-The-I2C-of-ATmega128
• http://webnautes.tistory.com/671
• http://openctrl.tistory.com/entry/I2C-TWI
• http://read.pudn.com/downloads157/doc/comm/699258/Atmega128-TWI-2008.pdf
  
• http://ww1.microchip.com/downloads/en/DeviceDoc/doc2467.pdf

1. 모듈

2. HW 구성

3. Project 파일 추가

Project > Configure

Files > Input Files

4. SW 구성

• main.c

• 
  

• lcd1602.c
• lcd1602.h
• unsigned char LCD_SendInternal(unsigned char lcd_addr, unsigned char data, unsigned char flags);
• unsigned char LCD_SendCommand(unsigned char lcd_addr, unsigned char cmd);
• unsigned char LCD_SendData(unsigned char lcd_addr, unsigned char data);
• void LCD_Init(unsigned char lcd_addr);
• void LCD_SendString(unsigned char lcd_addr, char *str);
  

• myI2C.c
• myI2C.h
• void TWIInit(void);
• unsigned char WriteData(unsigned char u8addr, unsigned char *u8data, unsigned char len);
• unsigned char ReadData(unsigned char u8addr, unsigned char u8reg, unsigned char *u8data);
  

• lcd1602_i2c.prj

5. 소스

•  https://github.com/sglee0223/atmega128/tree/master/lcd1602_i2c

6. 결과