Introduction - If you have any usage issues, please Google them yourself
This program uses the ICC on the clock control chip is programmed, the use of step 1, the eight-wire drive LCD1602B: PB0-PB7 as the data line, PD3/PD4/PD6 control LCD1602B the RS, RW, EN. 2, set and read the DS1302 internal clock, and through the LCD1602 display.