lyre liu / Mbed 2 deprecated project1

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Dependencies:   mbed

main.cpp@14:b67ce99ccd48, 2016-03-08 (annotated)

Committer:
lyreliu
Date:
Tue Mar 08 14:44:19 2016 +0000
Revision:
14:b67ce99ccd48
Parent:
13:8db371de14a7
Child:
15:0c28f02dd5dc
program test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lyreliu 0:d6ad48301389 1 #include "mbed.h"
lyreliu 14:b67ce99ccd48 2 #define RATIO 1 //The amplified factor of the OA
lyreliu 10:0457bb95d21e 3 #define SAMPLE_TIME 500 // Sample time, default is 100ms
lyreliu 0:d6ad48301389 4 void MassCompute(float); // The function of computing mass from voltage.
lyreliu 0:d6ad48301389 5 void SerialInit(void); // The function fo serial initial
lyreliu 0:d6ad48301389 6 void SerialTransmit(void); // Transmit the data through the serial
lyreliu 0:d6ad48301389 7
lyreliu 0:d6ad48301389 8 AnalogIn voltage(p20); // AnalogIn is a class of anlog input, p20 is the pin you use for anlog input,
lyreliu 0:d6ad48301389 9 // You can change the pin from pin15 to pin20
lyreliu 11:261f1ba05668 10 float voltage_measure;
lyreliu 0:d6ad48301389 11 Serial pc(USBTX, USBRX); // Communicate with PC through the serial
lyreliu 2:65d319447726 12
lyreliu 2:65d319447726 13 DigitalOut high_pin(p5); //test pin, p5 is the high level pin
lyreliu 2:65d319447726 14 DigitalOut low_pin(p6); //test pin, p6 is the low level pin
lyreliu 0:d6ad48301389 15
lyreliu 0:d6ad48301389 16 float mass; // The mass of the object
lyreliu 7:1f0ab6c43458 17 unsigned char mass_trans_high; // A 8 bits mass used for transmitting
lyreliu 7:1f0ab6c43458 18 unsigned char mass_trans_low;
lyreliu 0:d6ad48301389 19
lyreliu 5:ff47bcaebc64 20 unsigned short int test;
lyreliu 5:ff47bcaebc64 21
lyreliu 0:d6ad48301389 22 int main()
lyreliu 0:d6ad48301389 23 {
lyreliu 0:d6ad48301389 24 SerialInit(); //Initial the serial
lyreliu 2:65d319447726 25
lyreliu 2:65d319447726 26 high_pin = 1;
lyreliu 2:65d319447726 27 low_pin = 0;
lyreliu 2:65d319447726 28
lyreliu 5:ff47bcaebc64 29 test = 0xff;
lyreliu 5:ff47bcaebc64 30
lyreliu 0:d6ad48301389 31 while(1)
lyreliu 0:d6ad48301389 32 {
lyreliu 11:261f1ba05668 33 voltage_measure = voltage.read();
lyreliu 11:261f1ba05668 34 MassCompute(voltage_measure);
lyreliu 6:0d854548023b 35 SerialTransmit();
lyreliu 6:0d854548023b 36 //pc.printf("%d",test);
lyreliu 4:8af87a432c12 37 wait_ms(SAMPLE_TIME); //Wait for 100ms, this is the sample time.
lyreliu 0:d6ad48301389 38 }
lyreliu 0:d6ad48301389 39 }
lyreliu 0:d6ad48301389 40
lyreliu 13:8db371de14a7 41 void MassCompute(float vol)
lyreliu 0:d6ad48301389 42 {
lyreliu 1:d9a739fe837e 43 //float ratio; //The amplified factor of the OA
lyreliu 0:d6ad48301389 44 float vol_ref; //Reference voltage, the basic voltage of the MCU, the default number is 3.3
lyreliu 0:d6ad48301389 45
lyreliu 0:d6ad48301389 46 vol_ref = 3.3;
lyreliu 0:d6ad48301389 47
lyreliu 13:8db371de14a7 48 mass = 3000*vol_ref*vol/RATIO + 0.3; //The compute function of mass from the voltage
lyreliu 0:d6ad48301389 49 }
lyreliu 0:d6ad48301389 50
lyreliu 0:d6ad48301389 51 void SerialInit(void)
lyreliu 0:d6ad48301389 52 {
lyreliu 0:d6ad48301389 53 pc.baud(9600); //Set the baud rate
lyreliu 0:d6ad48301389 54 pc.format(8,SerialBase::None,1); //8bit number,no parity has been used,stop bits 1
lyreliu 0:d6ad48301389 55 }
lyreliu 0:d6ad48301389 56
lyreliu 0:d6ad48301389 57 void SerialTransmit(void)
lyreliu 0:d6ad48301389 58 {
lyreliu 12:623f562fc3db 59 unsigned char start,end,voltage_high,voltage_low,voltage_test;
lyreliu 3:2566acb12c47 60 start = 0xfe;
lyreliu 3:2566acb12c47 61 end = 0xff;
lyreliu 11:261f1ba05668 62
lyreliu 11:261f1ba05668 63
lyreliu 0:d6ad48301389 64 if(mass>3)
lyreliu 0:d6ad48301389 65 mass =3;
lyreliu 10:0457bb95d21e 66 mass_trans_low = (unsigned char)(mass*10000);
lyreliu 10:0457bb95d21e 67 mass_trans_high = (unsigned char)(mass*10000)>>8;
lyreliu 12:623f562fc3db 68 voltage_test = (unsigned char)voltage_measure*10;
lyreliu 9:f4bfd06b3ef1 69
lyreliu 11:261f1ba05668 70 voltage_high = (unsigned char)(voltage_measure*10000)>>8;
lyreliu 11:261f1ba05668 71 voltage_low = (unsigned char)(voltage_measure*10000);
lyreliu 11:261f1ba05668 72
lyreliu 10:0457bb95d21e 73 pc.printf("%c",start);
lyreliu 11:261f1ba05668 74 //pc.printf("%c",mass_trans_high);
lyreliu 11:261f1ba05668 75 //pc.printf("%c",mass_trans_low);
lyreliu 13:8db371de14a7 76
lyreliu 13:8db371de14a7 77 pc.printf("%c",voltage_high);
lyreliu 13:8db371de14a7 78 pc.printf("%c",voltage_low);
lyreliu 10:0457bb95d21e 79 pc.printf("%c",end);
lyreliu 0:d6ad48301389 80 }