Bayley Wang
robot
PwmIn/PwmIn.cpp@79:d0b1bb3dcf68, 2017-02-28 (annotated)
- Committer:
- bwang
- Date:
- Tue Feb 28 03:32:21 2017 +0000
- Revision:
- 79:d0b1bb3dcf68
- Parent:
- 78:b8df106126a7
- Child:
- 92:a9dac72d8cac
added FlashWriter class
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| bwang | 19:a6cf15f89f3d | 1 | #include "mbed.h" |
| bwang | 18:3863ca45cf26 | 2 | #include "PwmIn.h" |
| bwang | 19:a6cf15f89f3d | 3 | #include "MathHelpers.h" |
| dicarloj | 13:41d102a53caf | 4 | |
| bwang | 78:b8df106126a7 | 5 | PwmIn::PwmIn(PinName pin, int usec_min, int usec_max, int usec_crazy) |
| dicarloj | 13:41d102a53caf | 6 | { |
| dicarloj | 13:41d102a53caf | 7 | int_in = new InterruptIn(pin); |
| dicarloj | 13:41d102a53caf | 8 | dig_in = new DigitalIn(pin); |
| bwang | 16:f283d6032fe5 | 9 | int_in->rise(this, &PwmIn::handle_rise); |
| bwang | 16:f283d6032fe5 | 10 | int_in->fall(this, &PwmIn::handle_fall); |
| dicarloj | 13:41d102a53caf | 11 | this->usec_min = usec_min; |
| dicarloj | 13:41d102a53caf | 12 | this->usec_max = usec_max; |
| bwang | 78:b8df106126a7 | 13 | this->usec_crazy = usec_crazy; |
| bwang | 75:591556ce033d | 14 | |
| bwang | 75:591556ce033d | 15 | usecs = usec_min; |
| bwang | 75:591556ce033d | 16 | blocked = false; |
| bwang | 75:591556ce033d | 17 | enabled = false; |
| dicarloj | 13:41d102a53caf | 18 | } |
| dicarloj | 13:41d102a53caf | 19 | |
| dicarloj | 13:41d102a53caf | 20 | |
| bwang | 16:f283d6032fe5 | 21 | bool PwmIn::get_enabled() |
| dicarloj | 13:41d102a53caf | 22 | { |
| dicarloj | 13:41d102a53caf | 23 | return enabled; |
| dicarloj | 13:41d102a53caf | 24 | } |
| dicarloj | 13:41d102a53caf | 25 | |
| bwang | 16:f283d6032fe5 | 26 | void PwmIn::handle_rise() |
| dicarloj | 13:41d102a53caf | 27 | { |
| dicarloj | 13:41d102a53caf | 28 | enabled = true; |
| bwang | 75:591556ce033d | 29 | |
| dicarloj | 13:41d102a53caf | 30 | timer.stop(); |
| dicarloj | 13:41d102a53caf | 31 | timer.reset(); |
| dicarloj | 13:41d102a53caf | 32 | timer.start(); |
| dicarloj | 13:41d102a53caf | 33 | } |
| dicarloj | 13:41d102a53caf | 34 | |
| bwang | 16:f283d6032fe5 | 35 | void PwmIn::handle_fall() |
| dicarloj | 13:41d102a53caf | 36 | { |
| bwang | 75:591556ce033d | 37 | int usecs_new = timer.read_us(); |
| dicarloj | 13:41d102a53caf | 38 | timer.stop(); |
| dicarloj | 13:41d102a53caf | 39 | timer.reset(); |
| dicarloj | 13:41d102a53caf | 40 | timer.start(); |
| bwang | 75:591556ce033d | 41 | |
| bwang | 75:591556ce033d | 42 | if (blocked) { |
| bwang | 75:591556ce033d | 43 | blocked = false; |
| bwang | 75:591556ce033d | 44 | return; |
| bwang | 75:591556ce033d | 45 | } |
| bwang | 75:591556ce033d | 46 | |
| bwang | 78:b8df106126a7 | 47 | if (usecs_new <= usec_crazy) usecs = usecs_new; |
| dicarloj | 13:41d102a53caf | 48 | } |
| dicarloj | 13:41d102a53caf | 49 | |
| bwang | 16:f283d6032fe5 | 50 | float PwmIn::get_throttle() |
| dicarloj | 13:41d102a53caf | 51 | { |
| dicarloj | 13:41d102a53caf | 52 | if(timer.read_us() > 40000) enabled = false; |
| dicarloj | 13:41d102a53caf | 53 | if(!enabled) return -1; |
| dicarloj | 13:41d102a53caf | 54 | return constrain(map((float)usecs, usec_min, usec_max, 0, 1), 0, 1); |
| dicarloj | 13:41d102a53caf | 55 | } |
| dicarloj | 13:41d102a53caf | 56 |