STM32's USART0 and ZigBee's P02_RX and P03_TX pins realize serial bidirectional communication

STM32's USART0 and ZigBee's P02_RX and P03_TX pins realize serial bidirectional communication

BY:T7

Date:20171214

At:YSU_B307

Development Environment:

uVision : V5.12.0.0 STM32F103V8T6

Library version: STM32F10x_StdPeriph_Lib_V3.5.0

1. Hardware connection:

1. STM32：

2. Zigbee

3. Z-TEK ZY099 RS232 TO TTL (5V) serial port converter compatible with level 232 to TTL

4. Nine-pin serial cable RS232 cable db9 male to male cross cable

5. Connection diagram from STM32 to ZigBee

2. Code:

1.STM32 code: Function: what the serial port receives and what it sends

Link: https://pan.baidu.com/s/1bGgurO Password: m9ls

3. ZigBee code: Function: serial port transparent transmission

Link: https://pan.baidu.com/s/1nvvHutz Password: 1k27

3. Experimental results:

Functional implementation: After the hardware is connected and the code is downloaded as described above, connect the ZigBee coordinator to the PC through the serial port, open sscom32, and send "This is the Serial Test!" to the coordinator. The coordinator sends the data to the terminal node through the serial port transparent transmission function. The terminal node receives the message and converts it to RS232 via P02_RX, P03_TX ----> TTL ---> STM32; then STM32 receives the data and converts it to TTL via RS232 ---> P02_RX, P03_TX (terminal node) ---> coordinator through the serial port, and then sends it to the sscom32 window of the PC through the serial port of the coordinator. As shown below: