Zoltan Hudak
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
Boardsetup block and replace the serial port number with mbed's actual virtual serial port number.
- Double click on the
Digital WRITEblock 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
Boardsetup block and replace the serial port number with mbed's actual virtual serial port number.
- Double click on the
Analog READblock 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/ScilabSerial.h
- Revision:
- 0:295b7e1c12f3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ScilabSerial/ScilabSerial.h Mon Jan 18 19:51:22 2021 +0000
@@ -0,0 +1,103 @@
+#ifndef SCILABSERIAL_H
+#define SCILABSERIAL_H
+
+#include "mbed.h"
+#include "Servo.h"
+#include "IntrInCounter.h"
+#include "Encoder.h"
+#include "DcMotor.h"
+#include "MPU6050.h"
+
+//#define USBSERIAL
+#define RX_MAX 64
+
+#ifdef USBSERIAL
+#include "USBSerial.h"
+//#include "stm32f103c8t6.h"
+#endif
+/**
+ * @brief The PcSerial class
+ * @note For serial communication with PC
+ */
+#ifdef USBSERIAL
+class PcSerial :
+ public USBSerial
+{
+public:
+ PcSerial() :
+ USBSerial(0x1f00, 0x2012, 0x0001, false)
+ {
+ rxDataLen = 0;
+ attach(this, &PcSerial::onRx);
+ }
+
+ void onRx()
+ {
+ memset(rxData, 0, RX_MAX);
+ while (available()) {
+ char c = _getc();
+ if (c != '\n') {
+ if (rxDataLen >= RX_MAX)
+ rxDataLen = 0; // rxBuf overflow
+ rxData[rxDataLen++] = c;
+ }
+ }
+ }
+
+ ssize_t write(const void* buffer, size_t length) { return writeBlock((uint8_t*)buffer, length); }
+ char rxData[RX_MAX];
+ volatile size_t rxDataLen;
+};
+#else
+class ScilabSerial :
+ public SerialBase
+{
+ bool _rxComplete;
+ char _rxBuf[RX_MAX];
+ volatile size_t _rxBufLen;
+ char _rxData[RX_MAX];
+ volatile size_t _rxDataLen;
+
+#if defined(TARGET_BLUEPILL)
+ PinName _digitalPinName[16] = { NC, NC, D2, D3, D4, D5, D6, D7, D8, NC, D10, D11, D12, D13, D14, D15 };
+ PinName _analogPinName[6] = { A0, A1, A2, A3, NC, NC };
+#elif defined(TARGET_BLACKPILL)
+ PinName _digitalPinName[16] = { NC, NC, D2, D3, D4, D5, D6, D7, D8, NC, D10, D11, D12, D13, D14, D15 };
+ PinName _analogPinName[6] = { A0, A1, A2, A3, NC, NC };
+#else
+ PinName _digitalPinName[16] = { NC, NC, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15 };
+ PinName _analogPinName[6] = { A0, A1, A2, A3, A4, A5 };
+#endif
+ DigitalInOut* _digitalInOuts[8];
+ AnalogIn* _analogIns[6];
+ PwmOut* _pwmOuts[4];
+ IntrInCounter* _intrInCounters[8];
+ Servo* _servos[2];
+ Encoder* _encoders[2];
+ DcMotor* _dcMotors[2];
+ MPU6050* _mpu6050;
+ Timer _mpu6050Timer;
+ uint32_t _now;
+ float _deltaT;
+ bool _mpu6050Available;
+public:
+
+ ScilabSerial(PinName tx, PinName rx, int baud = 115200);
+
+ void run();
+ void onRx();
+ ssize_t write(const void* buffer, size_t length);
+ void analogRead();
+ void pwmWrite();
+ void digitalReadWrite();
+ void servo();
+ void mpu6050();
+ void intrInCounter();
+ void encoder();
+ void dcMotorInit();
+ void dcMotor();
+ void revision();
+ void mpu6050UpdateData();
+};
+#endif
+#endif // SCILABSERIAL_H