Write data to serial device
Connect to and Exchange Data with Serial Device
You can connect to a serial device from the MATLAB® software, write data to the device, and read data from the device.
Create a connection from the MATLAB software to the Raspberry Pi™ hardware.
mypi = raspi
Show the location of the Tx and Rx pins,
14 (UART0_TXD) and
GPIO 15 (UART0_RXD),
on the GPIO header.
Raspberry Pi hardware uses +3.3 V. Do not connect Raspberry Pi hardware directly to devices that use higher voltages.
Connect the Raspberry Pi serial port to a +3.3 V serial device.
To receive data, connect the RXD pin (
GPIO 15 UART0_RXD) on the Raspberry Pi board to the TXD pin on the serial device.
To transmit data, connect the TXD pin (
GPIO 14 UART0_TXD) on the Raspberry Pi board to the RXD pin on the serial device.
Connect a ground pin (
GND) on the Raspberry Pi board to the
GNDpin on the serial device.
Connect one of the
+3.3 Vpins on the Raspberry Pi board to the
VCCpin on the serial device.
Research the values the serial device requires for baud, data bits, parity, and stop bit.
Create a connection,
from the MATLAB software to the serial device.
myserialdevice = serialdev(mypi,'/dev/serial0',9600)
myserialdevice = Serialdev with Properties: Port: '/dev/serial0' BaudRate: 9600 DataBits: 8 Parity: 'none' StopBits: 1 Timeout: 10
Write a pair of values to the serial device that requires a specific data type.
Read a 100-element array of numbers from the serial port.
output = read(myserialdevice,100,'uint16')
Increase the timeout period of the serial port.
myserialdevice.Timeout = 20
myserialdevice = Serialdev with Properties: Port: '/dev/serial0' BaudRate: 115200 DataBits: 8 Parity: 'none' StopBits: 1 Timeout: 20
data — Data to write to serial device
Data to write to the serial device, specified as a vector. The value is
cast to the precision selected in the
precision argument. If you do not specify the
precision argument, the value is cast to the default
precision — Data precision
'uint8' (default) |
Data precision, specified as a string. Optional.
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
writefunction does not support code generation for character data.
You can also deploy
writeon the Raspberry Pi hardware in MATLAB Online™.