¶ Preparation
- Power cord
- ADB Debugging
- Serial cable / jumper cap
- YY3588 Development Board
¶ Hardware connections
The UART1 interface is as follows:
The UART6 interface is as follows:
The UART7 interface is as follows:
The UART9 interface is as follows:
¶ Serial loopback test
The YY3588 development board provides a total of 5 uarts for customers to use, uart2 is used as the Debug port, and the others are registered as ttyS1, ttyS6, ttyS7, ttyS9
Please see the schematic for the corresponding hardware location.
This chapter takes UART1 as an example. Users can refer to it to use other serial ports.
For the ADB environment, please refer to the chapter Debugging Methods
¶ Relevant commands
// Switch admin user
su
// View the device UART node
ls /dev/ttyS*
// Check the serial port information
stty -F /dev/ttyS1
// Set the serial baud rate to 115200
stty -F /dev/ttyS1 speed 115200
// Set the eight-bit data bits of the serial port,no parity,one stop bit,and no echo.
stty -F /dev/ttyS1 cs8 -parenb -cstopb -echo
// receive data in background
cat /dev/ttyS1 &
// Execute sending in the front desk
echo -e "1234567890\n" > /dev/ttyS1
¶ Test results
