steeven lee / Scope

A simple Oscilloscope that log each pin's data change Please dump log and analyze using Excel x-y chart type!

/media/uploads/steeven/mbed_sco.jpg

Scope.cpp@0:6c6d961dc8b3, 2015-05-10 (annotated)

Committer:
steeven
Date:
Sun May 10 13:16:26 2015 +0000
Revision:
0:6c6d961dc8b3
init

Who changed what in which revision?

UserRevisionLine numberNew contents of line
steeven 0:6c6d961dc8b3 1 #include "Scope.h"
steeven 0:6c6d961dc8b3 2
steeven 0:6c6d961dc8b3 3 namespace steeven {
steeven 0:6c6d961dc8b3 4
steeven 0:6c6d961dc8b3 5 ScopePin::ScopePin(PinName pin, char id, Scope *scope) :
steeven 0:6c6d961dc8b3 6 _pin(pin), _id(id), _scope(scope) {
steeven 0:6c6d961dc8b3 7 _pin.fall(this, &ScopePin::on_fall);
steeven 0:6c6d961dc8b3 8 _pin.rise(this, &ScopePin::on_rise);
steeven 0:6c6d961dc8b3 9 }
steeven 0:6c6d961dc8b3 10
steeven 0:6c6d961dc8b3 11 void ScopePin::on_fall() {
steeven 0:6c6d961dc8b3 12 _scope->log(_id, 0);
steeven 0:6c6d961dc8b3 13 }
steeven 0:6c6d961dc8b3 14 void ScopePin::on_rise() {
steeven 0:6c6d961dc8b3 15 _scope->log(_id, 1);
steeven 0:6c6d961dc8b3 16 }
steeven 0:6c6d961dc8b3 17
steeven 0:6c6d961dc8b3 18 Scope::Scope(int buf_len) :
steeven 0:6c6d961dc8b3 19 _buf_len(buf_len) {
steeven 0:6c6d961dc8b3 20 _cnt = 0;
steeven 0:6c6d961dc8b3 21 _buf_cnt = 0;
steeven 0:6c6d961dc8b3 22 _buf = new ScopeData[buf_len];
steeven 0:6c6d961dc8b3 23 _timer.start();
steeven 0:6c6d961dc8b3 24 }
steeven 0:6c6d961dc8b3 25
steeven 0:6c6d961dc8b3 26 void Scope::add(PinName pin, const char *name) {
steeven 0:6c6d961dc8b3 27 new ScopePin(pin, _cnt, this);
steeven 0:6c6d961dc8b3 28 _names[_cnt] = name;
steeven 0:6c6d961dc8b3 29 // printf("%s ", _names[_cnt]);
steeven 0:6c6d961dc8b3 30 _cnt++;
steeven 0:6c6d961dc8b3 31 }
steeven 0:6c6d961dc8b3 32
steeven 0:6c6d961dc8b3 33 void Scope::log(char id, int v) {
steeven 0:6c6d961dc8b3 34 if (_buf_cnt >= _buf_len)
steeven 0:6c6d961dc8b3 35 error("Scope buffer overflow!\n");
steeven 0:6c6d961dc8b3 36 _buf[_buf_cnt].id = (char) (v << 7) + id;
steeven 0:6c6d961dc8b3 37 _buf[_buf_cnt].time = _timer.read();
steeven 0:6c6d961dc8b3 38 _buf_cnt++;
steeven 0:6c6d961dc8b3 39 }
steeven 0:6c6d961dc8b3 40
steeven 0:6c6d961dc8b3 41 void Scope::dump(BufferedSerial *logger) {
steeven 0:6c6d961dc8b3 42 int i, j, k;
steeven 0:6c6d961dc8b3 43
steeven 0:6c6d961dc8b3 44 logger->putc('\n');
steeven 0:6c6d961dc8b3 45
steeven 0:6c6d961dc8b3 46 // channel names;
steeven 0:6c6d961dc8b3 47 logger->puts("time\t");
steeven 0:6c6d961dc8b3 48 for (i = 0; i < _cnt; ++i) {
steeven 0:6c6d961dc8b3 49 logger->puts(_names[i]);
steeven 0:6c6d961dc8b3 50 logger->putc('\t');
steeven 0:6c6d961dc8b3 51 }
steeven 0:6c6d961dc8b3 52 logger->putc('\n');
steeven 0:6c6d961dc8b3 53
steeven 0:6c6d961dc8b3 54 // channel data
steeven 0:6c6d961dc8b3 55 for (j = 0; j < _cnt; ++j) { // buy channel
steeven 0:6c6d961dc8b3 56 for (i = 0; i < _buf_cnt; ++i) { // find in all data
steeven 0:6c6d961dc8b3 57 if ((_buf[i].id & 0x7f) == j) { // if this pin
steeven 0:6c6d961dc8b3 58 logger->printf("%f\t", _buf[i].time);
steeven 0:6c6d961dc8b3 59 for (k = 0; k < j; ++k)
steeven 0:6c6d961dc8b3 60 logger->putc('\t');
steeven 0:6c6d961dc8b3 61 logger->printf("%d", ((_buf[i].id & 0x80) > 0 ? 1 : 0) + j * 2); // add offset
steeven 0:6c6d961dc8b3 62 logger->putc('\n');
steeven 0:6c6d961dc8b3 63 }
steeven 0:6c6d961dc8b3 64 }
steeven 0:6c6d961dc8b3 65 }
steeven 0:6c6d961dc8b3 66
steeven 0:6c6d961dc8b3 67 //clear data
steeven 0:6c6d961dc8b3 68 _buf_cnt = 0;
steeven 0:6c6d961dc8b3 69 }
steeven 0:6c6d961dc8b3 70 }