Testing Methods Module provides STC15W and STM32 microcontroller 8-channel serial display reference program and STC89C52 single-chip 4-channel 1602LCD display reference program, the STC89C52 single-chip 1602 LCD LCD test method is as follows: 5V、GND connect to DC 5V power supply, SCLK、DIN、DOUT、DRDY、CS connect to Single-chip P1.2, P1.3, P1.4, P1.5, P1.6 respectively, AIN0、AIN1、AIN2、AIN3 connect to 2.5V、2.5V、2.5V、2.5V respectively (The measured voltage should be in common with the ADS1256), then 1602 LCD will shows these four sets of voltage values, in which, the 1st ,2nd ,4th sets are single-ended input voltage value of AIN0、AIN1、AIN3, and the 3rd set is the difference of AIN2-AIN3, the voltage values of these four sets are 2.5V、2.5V、0V、2.5V
