多功能太阳能热水器设计 硬件：AT89S52单片机，晶振为12MHz，KS0108驱动的128*64液晶 SPI总线的DS1302时钟，1-WIRE温度传感器DS18B20。-Multi-function hardware design of solar water heater: AT89S52 microcontroller, crystal oscillator for the 12MHz, KS0108-driven 128* 64 LCD SPI bus ,1-WIRE clock D