lyre liu / Mbed 2 deprecated project1

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Dependencies:   mbed

main.cpp@4:8af87a432c12, 2016-03-06 (annotated)

Committer:
lyreliu
Date:
Sun Mar 06 13:41:41 2016 +0000
Revision:
4:8af87a432c12
Parent:
3:2566acb12c47
Child:
5:ff47bcaebc64
lpc1768 program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lyreliu 0:d6ad48301389 1 #include "mbed.h"
lyreliu 1:d9a739fe837e 2 #define RATIO 1 //The amplified factor of the OA ??????????????????????????????????????????????????
lyreliu 4:8af87a432c12 3 #define SAMPLE_TIME 100 // 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 0:d6ad48301389 10 Serial pc(USBTX, USBRX); // Communicate with PC through the serial
lyreliu 2:65d319447726 11
lyreliu 2:65d319447726 12 DigitalOut high_pin(p5); //test pin, p5 is the high level pin
lyreliu 2:65d319447726 13 DigitalOut low_pin(p6); //test pin, p6 is the low level pin
lyreliu 0:d6ad48301389 14
lyreliu 0:d6ad48301389 15 float mass; // The mass of the object
lyreliu 3:2566acb12c47 16 unsigned short int mass_trans_high; // A 8 bits mass used for transmitting
lyreliu 3:2566acb12c47 17 unsigned short int mass_trans_low;
lyreliu 0:d6ad48301389 18
lyreliu 0:d6ad48301389 19 int main()
lyreliu 0:d6ad48301389 20 {
lyreliu 0:d6ad48301389 21 SerialInit(); //Initial the serial
lyreliu 2:65d319447726 22
lyreliu 2:65d319447726 23 high_pin = 1;
lyreliu 2:65d319447726 24 low_pin = 0;
lyreliu 2:65d319447726 25
lyreliu 0:d6ad48301389 26 while(1)
lyreliu 0:d6ad48301389 27 {
lyreliu 0:d6ad48301389 28 MassCompute(voltage.read());
lyreliu 0:d6ad48301389 29 SerialTransmit();
lyreliu 4:8af87a432c12 30 wait_ms(SAMPLE_TIME); //Wait for 100ms, this is the sample time.
lyreliu 0:d6ad48301389 31 }
lyreliu 0:d6ad48301389 32 }
lyreliu 0:d6ad48301389 33
lyreliu 0:d6ad48301389 34 void MassCompute(float voltage)
lyreliu 0:d6ad48301389 35 {
lyreliu 1:d9a739fe837e 36 //float ratio; //The amplified factor of the OA
lyreliu 0:d6ad48301389 37 float vol_ref; //Reference voltage, the basic voltage of the MCU, the default number is 3.3
lyreliu 0:d6ad48301389 38
lyreliu 0:d6ad48301389 39 vol_ref = 3.3;
lyreliu 0:d6ad48301389 40
lyreliu 1:d9a739fe837e 41 mass = 3000*vol_ref*voltage/RATIO + 0.3; //The compute function of mass from the voltage
lyreliu 0:d6ad48301389 42 }
lyreliu 0:d6ad48301389 43
lyreliu 0:d6ad48301389 44 void SerialInit(void)
lyreliu 0:d6ad48301389 45 {
lyreliu 0:d6ad48301389 46 pc.baud(9600); //Set the baud rate
lyreliu 0:d6ad48301389 47 pc.format(8,SerialBase::None,1); //8bit number,no parity has been used,stop bits 1
lyreliu 0:d6ad48301389 48 }
lyreliu 0:d6ad48301389 49
lyreliu 0:d6ad48301389 50 void SerialTransmit(void)
lyreliu 0:d6ad48301389 51 {
lyreliu 3:2566acb12c47 52 unsigned int start,end;
lyreliu 3:2566acb12c47 53 start = 0xfe;
lyreliu 3:2566acb12c47 54 end = 0xff;
lyreliu 0:d6ad48301389 55 if(mass>3)
lyreliu 0:d6ad48301389 56 mass =3;
lyreliu 3:2566acb12c47 57 mass_trans_low = (int)(mass*10000);
lyreliu 3:2566acb12c47 58 mass_trans_high = (int)(mass*10000)>>8;
lyreliu 3:2566acb12c47 59 pc.printf("%d",start);
lyreliu 3:2566acb12c47 60 pc.printf("%d",mass_trans_high);
lyreliu 3:2566acb12c47 61 pc.printf("%d",mass_trans_low);
lyreliu 3:2566acb12c47 62 pc.printf("%d",end);
lyreliu 0:d6ad48301389 63 }