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Data acquisition and device control with Scilab.
Desciription
Scilab is a freeware alternative to MATLAB. For low-cost data acquisition and device control a nice Arduino toolbox is available.
This site presents a Mbed port which allows to use Mbed boards (equipped with Arduino header) rather than Arduino to import real time data into Scilab and to control real equipment witch Scilab.
Installation
- Install Scilab to your PC, if not done yet.
- Launch Scilab and install the Arduino toolbox by executing the following command from the Scilab console:
--> atomsInstall("arduino")
Controlling Mbed's digital output from Scilab
- In Xcos open
examples/Arduino1.zcos
- Double click on the
Board
setup block and replace the serial port number with mbed's actual virtual serial port number.
- Double click on the
Digital WRITE
block and set Digital Pin to 13 (D13 is connected to LED1).
- Start simulation and LED1 on the Mbed board should start blinking.
Reading and displaying Mbed's analog input
- In Xcos open
examples/Arduino2.zcos
- Double click on the
Board
setup block and replace the serial port number with mbed's actual virtual serial port number.
- Double click on the
Analog READ
block and set Analog Pin to 2.
- Start simulation and a graph should appear showing the analog signal measured on Mbed's pin A2.
NOTE: Currently, there is bug in the toolbox ARDUINO_ANALOG_READ_sim function (I have reported to Scilab) so the analog readings are not correct.
PID controller
- In Xcos open
examples/Arduino9.zcos
Diff: ScilabSerial/DcMotor.cpp
- Revision:
- 0:295b7e1c12f3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ScilabSerial/DcMotor.cpp Mon Jan 18 19:51:22 2021 +0000 @@ -0,0 +1,66 @@ +#include "DcMotor.h" + +/** + * @brief The DcMotor class + * @note Driven by L293 or L298 + */ +DcMotor::DcMotor(PinName pin1, PinName pin2, int driverType) : + _driverType(driverType) +{ + _pwmOut1 = new PwmOut(pin1); + _pwmOut1->write(0); + switch (_driverType) { + case 0: //L293 + _pwmOut2 = new PwmOut(pin2); + _pwmOut2->write(0); + break; + + case 1: //L297 + _digitalOut2 = new DigitalOut(pin2); + _digitalOut2->write(0); + break; + } +} + +/** + * @brief + * @note + * @param + * @retval + */ +DcMotor::~DcMotor() +{ + delete _pwmOut1; + delete _pwmOut2; +} + +/** + * @brief + * @note + * @param + * @retval + */ +void DcMotor::run(int direction, float speed) +{ + switch (_driverType) { + case 0: //L293 + if (direction == 0) { + _pwmOut1->write(0); + _pwmOut2->write(speed); + } + else { + _pwmOut1->write(speed); + _pwmOut2->write(0); + } + break; + + case 1: //L297 + if (direction == 0) + _digitalOut2->write(0); + else + _digitalOut2->write(1); + + _pwmOut1->write(speed); + break; + } +}