Gerrit Pathuis / Mbed 2 deprecated PwmIn_Irq-disable

Based the Library PwmIn by Simon Ford expanded with enable_irq and disable_irq for separate input signals. Program gives no real advantage above the original Library.

Dependencies:   mbed

main.cpp@2:79b52803da22, 2014-01-03 (annotated)

Committer:
GerritPathuis
Date:
Fri Jan 03 18:47:33 2014 +0000
Revision:
2:79b52803da22
Parent:
1:4bd14d5374c3 
Tested with two channels connected to a function generator

Who changed what in which revision?

UserRevisionLine numberNew contents of line
GerritPathuis 1:4bd14d5374c3 1 //////////////////////////////////////
GerritPathuis 2:79b52803da22 2 // Based on PwmIn Library
GerritPathuis 2:79b52803da22 3 // The basis is to disable the interrupts
GerritPathuis 1:4bd14d5374c3 4 // of the other PwmIn inputs
GerritPathuis 2:79b52803da22 5 // Connected to the function generator
GerritPathuis 2:79b52803da22 6 // puls on both inputs at the exact
GerritPathuis 2:79b52803da22 7 // same time.
GerritPathuis 2:79b52803da22 8 // Works excellent but further testing
GerritPathuis 2:79b52803da22 9 // showed that there is no real advantage
GerritPathuis 2:79b52803da22 10 // above the original PmwIn library
GerritPathuis 2:79b52803da22 11 //////////////////////////////////////
GerritPathuis 0:18d069b5f9f4 12 #include "mbed.h"
GerritPathuis 1:4bd14d5374c3 13 #include "InterruptIn.h"
GerritPathuis 0:18d069b5f9f4 14 #define NR 20
GerritPathuis 0:18d069b5f9f4 15
GerritPathuis 0:18d069b5f9f4 16 class PwmIn
GerritPathuis 0:18d069b5f9f4 17 {
GerritPathuis 0:18d069b5f9f4 18 public:
GerritPathuis 0:18d069b5f9f4 19 PwmIn(PinName p);
GerritPathuis 0:18d069b5f9f4 20 float period();
GerritPathuis 0:18d069b5f9f4 21 float pulsewidth();
GerritPathuis 0:18d069b5f9f4 22 float dutycycle();
GerritPathuis 2:79b52803da22 23 void disable();
GerritPathuis 2:79b52803da22 24 void enable();
GerritPathuis 0:18d069b5f9f4 25
GerritPathuis 0:18d069b5f9f4 26 protected:
GerritPathuis 0:18d069b5f9f4 27 void rise();
GerritPathuis 0:18d069b5f9f4 28 void fall();
GerritPathuis 0:18d069b5f9f4 29
GerritPathuis 0:18d069b5f9f4 30 InterruptIn _p;
GerritPathuis 0:18d069b5f9f4 31 Timer _t;
GerritPathuis 1:4bd14d5374c3 32 volatile float _pulsewidth, _period;
GerritPathuis 0:18d069b5f9f4 33 };
GerritPathuis 0:18d069b5f9f4 34
GerritPathuis 0:18d069b5f9f4 35 PwmIn::PwmIn(PinName p) : _p(p)
GerritPathuis 0:18d069b5f9f4 36 {
GerritPathuis 0:18d069b5f9f4 37 _p.rise(this, &PwmIn::rise);
GerritPathuis 0:18d069b5f9f4 38 _p.fall(this, &PwmIn::fall);
GerritPathuis 0:18d069b5f9f4 39 _period = 0.0;
GerritPathuis 0:18d069b5f9f4 40 _pulsewidth = 0.0;
GerritPathuis 0:18d069b5f9f4 41 _t.start();
GerritPathuis 0:18d069b5f9f4 42 }
GerritPathuis 0:18d069b5f9f4 43
GerritPathuis 1:4bd14d5374c3 44 PwmIn a(PTD2); // Sensor 1 X direction
GerritPathuis 0:18d069b5f9f4 45 PwmIn b(PTA17); // Sensor 1 Y direction
GerritPathuis 0:18d069b5f9f4 46 Serial pc(USBTX, USBRX); // tx, rx
GerritPathuis 0:18d069b5f9f4 47
GerritPathuis 0:18d069b5f9f4 48 float PwmIn::period()
GerritPathuis 0:18d069b5f9f4 49 {
GerritPathuis 0:18d069b5f9f4 50 return _period;
GerritPathuis 0:18d069b5f9f4 51 }
GerritPathuis 0:18d069b5f9f4 52
GerritPathuis 0:18d069b5f9f4 53 float PwmIn::pulsewidth()
GerritPathuis 0:18d069b5f9f4 54 {
GerritPathuis 0:18d069b5f9f4 55 return _pulsewidth;
GerritPathuis 0:18d069b5f9f4 56 }
GerritPathuis 0:18d069b5f9f4 57
GerritPathuis 0:18d069b5f9f4 58 float PwmIn::dutycycle()
GerritPathuis 0:18d069b5f9f4 59 {
GerritPathuis 0:18d069b5f9f4 60 return _pulsewidth / _period;
GerritPathuis 0:18d069b5f9f4 61 }
GerritPathuis 0:18d069b5f9f4 62
GerritPathuis 1:4bd14d5374c3 63 void PwmIn::disable()
GerritPathuis 1:4bd14d5374c3 64 {
GerritPathuis 2:79b52803da22 65 _p.disable_irq();
GerritPathuis 2:79b52803da22 66 }
GerritPathuis 2:79b52803da22 67
GerritPathuis 2:79b52803da22 68 void PwmIn::enable()
GerritPathuis 2:79b52803da22 69 {
GerritPathuis 2:79b52803da22 70 _p.enable_irq();
GerritPathuis 1:4bd14d5374c3 71 }
GerritPathuis 1:4bd14d5374c3 72
GerritPathuis 0:18d069b5f9f4 73 void PwmIn::rise()
GerritPathuis 0:18d069b5f9f4 74 {
GerritPathuis 0:18d069b5f9f4 75 _period = _t.read();
GerritPathuis 0:18d069b5f9f4 76 _t.reset();
GerritPathuis 0:18d069b5f9f4 77 }
GerritPathuis 0:18d069b5f9f4 78
GerritPathuis 0:18d069b5f9f4 79 void PwmIn::fall()
GerritPathuis 0:18d069b5f9f4 80 {
GerritPathuis 0:18d069b5f9f4 81 _pulsewidth = _t.read();
GerritPathuis 0:18d069b5f9f4 82 }
GerritPathuis 0:18d069b5f9f4 83
GerritPathuis 0:18d069b5f9f4 84 struct product {
GerritPathuis 2:79b52803da22 85 float pulsewidth;
GerritPathuis 2:79b52803da22 86 float period;
GerritPathuis 2:79b52803da22 87 float cycle;
GerritPathuis 0:18d069b5f9f4 88 } acc_a[NR], acc_b[NR], acc_c[NR],acc_d[NR];
GerritPathuis 0:18d069b5f9f4 89
GerritPathuis 1:4bd14d5374c3 90
GerritPathuis 0:18d069b5f9f4 91 int main()
GerritPathuis 0:18d069b5f9f4 92 {
GerritPathuis 2:79b52803da22 93 char pbuffer[512]="---";
GerritPathuis 0:18d069b5f9f4 94 int i;
GerritPathuis 0:18d069b5f9f4 95
GerritPathuis 2:79b52803da22 96 pc.baud(9600);
GerritPathuis 2:79b52803da22 97 sprintf(pbuffer, "Start test, baudrate is set to 9600 \n\r");
GerritPathuis 2:79b52803da22 98 pc.puts(pbuffer);
GerritPathuis 2:79b52803da22 99
GerritPathuis 2:79b52803da22 100 a.disable();
GerritPathuis 2:79b52803da22 101 b.disable();
GerritPathuis 0:18d069b5f9f4 102 while(1) {
GerritPathuis 2:79b52803da22 103 //-------------- sensor a--------------------
GerritPathuis 2:79b52803da22 104 a.enable(); // signal on input 50Hz is period of 20 milli second
GerritPathuis 2:79b52803da22 105 wait_ms(40); // signal on input 50Hz is period of 20 milli second
GerritPathuis 0:18d069b5f9f4 106 for (i=0; i<NR; i++) {
GerritPathuis 2:79b52803da22 107 acc_a[i].pulsewidth= a.pulsewidth(); // Sensor A
GerritPathuis 2:79b52803da22 108 acc_a[i].period= a.period(); // Sensor A
GerritPathuis 2:79b52803da22 109 acc_a[i].cycle= a.dutycycle(); // Sensor A
GerritPathuis 0:18d069b5f9f4 110 }
GerritPathuis 2:79b52803da22 111 a.disable();
GerritPathuis 2:79b52803da22 112
GerritPathuis 2:79b52803da22 113 //-------------- sensor b--------------------
GerritPathuis 2:79b52803da22 114 b.enable(); // signal on input 50Hz is period of 20 milli second
GerritPathuis 2:79b52803da22 115 wait_ms(40); // 50Hz is period of 20 milli second
GerritPathuis 2:79b52803da22 116 for (i=0; i<NR; i++) {
GerritPathuis 2:79b52803da22 117 acc_b[i].pulsewidth= b.pulsewidth(); // Sensor B
GerritPathuis 2:79b52803da22 118 acc_b[i].period= b.period(); // Sensor B
GerritPathuis 2:79b52803da22 119 acc_b[i].cycle= b.dutycycle(); // Sensor B
GerritPathuis 2:79b52803da22 120 }
GerritPathuis 2:79b52803da22 121 b.disable();
GerritPathuis 0:18d069b5f9f4 122
GerritPathuis 0:18d069b5f9f4 123 for (i=0; i<NR; i++) {
GerritPathuis 2:79b52803da22 124 sprintf(pbuffer, "a_pulse= %f, a_period= %f, a_c= %f, b_puls= %f, b_period= %f, b_cycle %f\n\r", acc_a[i].pulsewidth, acc_a[i].period, acc_a[i].cycle, acc_b[i].pulsewidth, acc_b[i].period, acc_b[i].cycle);
GerritPathuis 0:18d069b5f9f4 125 pc.puts(pbuffer);
GerritPathuis 0:18d069b5f9f4 126 }
GerritPathuis 2:79b52803da22 127 sprintf(pbuffer, "\n\r");
GerritPathuis 2:79b52803da22 128 pc.puts(pbuffer);
GerritPathuis 2:79b52803da22 129 wait_ms(100);
GerritPathuis 0:18d069b5f9f4 130 }
GerritPathuis 0:18d069b5f9f4 131 }