Coordinator module overall design circuit diagram

　　The overall design circuit diagram of the coordinator module is shown below

　　The coordinator is composed of CC2530, C8051F040, NANDFLASH, DS12887, 1602 and GSM module. Since the ordinary 51 single-chip microcomputer has only one serial port, it cannot meet the design requirements, so C8051F040 is used here. C8051F040 has one 12-bit multi-channel ADC, two 12-bit DACs, two voltage comparators, one voltage reference, one 32KB FLASH memory, two UART ports, and a high-speed CIP-51 core that is fully compatible with the MCS-51 instruction set. Serial port 0 of C8051F040 is connected to CC2530 to receive the mobile phone number and address information sent by CC2530; serial port 1 is connected to the GSM module to send address information to the corresponding mobile phone number. NANDFLASH is used to save the address of each area of ​​the parking lot and the instructions on how to reach the address from the entrance. The DS12887 high-precision clock chip is used to display the time and date, and calibrate the time of each terminal node. When the time is 00 hours, 00 minutes, and 00 seconds, C8051F040 will send a calibration command to CC2530, which will be sent to each terminal node through ZigBee, so as to calibrate the time of each terminal node to 00 hours, 00 minutes, and 00 seconds. C8051F040 is programmed with Keil C51, including the microcontroller initialization program, 1602 display subroutine, NANDFLASH read and write subroutine, serial port 0 receiving subroutine, clock program, time calibration subroutine, and serial port 1 receiving subroutine. The display circuit and storage circuit of the coordinator module are shown in Figure 4.