通过IIC总线读写实时时钟DS1307，并把时、分、秒显示在12864液晶屏上，用的CycloneII EP2C8，Quartus环境-Through the IIC bus read and write real-time clock, DS1307, and the hours, minutes and seconds displayed on the LCD screen on the 12864, used CycloneII

code DS1307_lcd using avr for coding