usart_sync_transfer_slave#
Overview#
The uart synchronous transfer slave example shows how to use usart driver in synchronous way:
In this example, one USART is configured as master node and another is configured as slave node. Master will send data to slave firstly, and then receive data from slave, slave board will send back the received data.
Supported Boards#
LPCXpresso51U68
Hardware requirements
Micro USB cable
LPCXpresso51U68 board
Personal Computer
Board settings
Please connect pins as below shows: Master board Slave board J1-13(U5_RXD) —– J1-11(U5_TXD) J1-11(U5_TXD) —– J1-13(U5_RXD) J1-9 (U5_SCLK) —– J1-9 (U5_SCLK) J1-7(GND) —– J1-7 (GND) Note that, please start slave board first.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J6) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
This is USART synchronous transfer master example.
Master will send data to slave firstly, and then receive data from slave.
Please connect the pins as below shows:
Master Board Slave Board
USART_TX ------- USART_RX
USART_RX ------- USART_TX
USART_SCLK ------- USART_SCLK
GND ------- GND
Transfer Complete. The data received from slave are:
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
Data transfer matched!
LPCXpresso54628
Hardware requirements
Micro USB cable
LPCXpresso54628 board
Personal Computer
Board settings
Please connect pins as below shows: Master board Slave board J9-13(U9_RXD) —– J9-11(U9_TXD) J9-11(U9_TXD) —– J9-13(U9_RXD) J9-9(U9_SCLK) —– J9-9(U9_SCLK) J9-7(GND) —– J9-7(GND) Note that, please start slave board first.
Make sure JP-6 is fitted to use the PMOD port.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
This is USART synchronous transfer slave example.
Slave will receive data from master firstly, and then send back the received characters.
Please connect the pins as below shows:
Master Board Slave Board
USART_TX ------- USART_RX
USART_RX ------- USART_TX
USART_SCLK ------- USART_SCLK
GND ------- GND
Data receive complete. The data received from master are:
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
Data send to master complete!
LPCXpresso54S018
Hardware requirements
Micro USB cable
LPCXpresso54s018 board
Personal Computer
Board settings
Please connect pins as below shows: Master board Slave board J9-8 (U9_RXD) —– J13-11(U9_TXD) J13-11(U9_TXD) —– J9-8 (U9_RXD) J9-9 (U9_SCLK) —– J9-9 (U9_SCLK) J9-7 (GND) —– J9-7 (GND) Note that, please start slave board first.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
This is USART synchronous transfer slave example.
Slave will receive data from master firstly, and then send back the received characters.
Please connect the pins as below shows:
Master Board Slave Board
USART_TX ------- USART_RX
USART_RX ------- USART_TX
USART_SCLK ------- USART_SCLK
GND ------- GND
Data receive complete. The data received from master are:
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
Data send to master complete!