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Lab5
Fork of TSI_sample by
main.cpp@4:d54e74fbf82c, 2018-02-22 (annotated)
- Committer:
- WilliamMarshQMUL
- Date:
- Thu Feb 22 16:59:24 2018 +0000
- Revision:
- 4:d54e74fbf82c
- Parent:
- 1:e6ffa08ad8bf
- Child:
- 5:6601376ae1b8
Remove unnecessary include "rtos.h"
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
WilliamMarshQMUL | 0:4374caa1ef17 | 1 | #include "mbed.h" |
WilliamMarshQMUL | 0:4374caa1ef17 | 2 | #include "TSISensor.h" |
WilliamMarshQMUL | 0:4374caa1ef17 | 3 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 4 | // Example program for lab 5 |
WilliamMarshQMUL | 0:4374caa1ef17 | 5 | // ------------------------- |
WilliamMarshQMUL | 0:4374caa1ef17 | 6 | // A value is read from the touch sensor and use |
WilliamMarshQMUL | 0:4374caa1ef17 | 7 | // to control two LEDs |
WilliamMarshQMUL | 0:4374caa1ef17 | 8 | // The value is also output to the serial interface |
WilliamMarshQMUL | 0:4374caa1ef17 | 9 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 10 | Serial pc(USBTX, USBRX); // tx, rx |
WilliamMarshQMUL | 0:4374caa1ef17 | 11 | DigitalOut redLED(LED_RED); |
WilliamMarshQMUL | 0:4374caa1ef17 | 12 | DigitalOut greenLED(LED_GREEN); |
WilliamMarshQMUL | 0:4374caa1ef17 | 13 | TSISensor tsi; |
WilliamMarshQMUL | 0:4374caa1ef17 | 14 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 15 | Thread redThread ; // thread for red LED |
WilliamMarshQMUL | 0:4374caa1ef17 | 16 | Thread greenThread ; // thread for green LED |
WilliamMarshQMUL | 0:4374caa1ef17 | 17 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 18 | void red_thread() { // method to run in thread |
WilliamMarshQMUL | 0:4374caa1ef17 | 19 | while (true) { |
WilliamMarshQMUL | 0:4374caa1ef17 | 20 | Thread::signal_wait(0x1); |
WilliamMarshQMUL | 0:4374caa1ef17 | 21 | redLED = false ; // turn on |
WilliamMarshQMUL | 0:4374caa1ef17 | 22 | Thread::wait(5000); |
WilliamMarshQMUL | 0:4374caa1ef17 | 23 | redLED = true ; // turn off |
WilliamMarshQMUL | 0:4374caa1ef17 | 24 | redThread.signal_clr(0x1) ; |
WilliamMarshQMUL | 0:4374caa1ef17 | 25 | // Signal are automatically cleared by wait_signal but |
WilliamMarshQMUL | 0:4374caa1ef17 | 26 | // the signal might have been set again while LED on |
WilliamMarshQMUL | 0:4374caa1ef17 | 27 | } |
WilliamMarshQMUL | 0:4374caa1ef17 | 28 | } |
WilliamMarshQMUL | 0:4374caa1ef17 | 29 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 30 | void green_thread() { // method to run in thread |
WilliamMarshQMUL | 0:4374caa1ef17 | 31 | while (true) { |
WilliamMarshQMUL | 0:4374caa1ef17 | 32 | Thread::signal_wait(0x1); |
WilliamMarshQMUL | 0:4374caa1ef17 | 33 | greenLED = false ; // turn on |
WilliamMarshQMUL | 0:4374caa1ef17 | 34 | Thread::wait(5000); |
WilliamMarshQMUL | 0:4374caa1ef17 | 35 | greenLED = true ; // turn off |
WilliamMarshQMUL | 0:4374caa1ef17 | 36 | greenThread.signal_clr(0x1) ; |
WilliamMarshQMUL | 0:4374caa1ef17 | 37 | // Signal are automatically cleared by wait_signal but |
WilliamMarshQMUL | 0:4374caa1ef17 | 38 | // the signal might have been set again while LED on |
WilliamMarshQMUL | 0:4374caa1ef17 | 39 | } |
WilliamMarshQMUL | 0:4374caa1ef17 | 40 | } |
WilliamMarshQMUL | 0:4374caa1ef17 | 41 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 42 | int main(void) { |
WilliamMarshQMUL | 0:4374caa1ef17 | 43 | redLED = true ; // turn off |
WilliamMarshQMUL | 0:4374caa1ef17 | 44 | greenLED = true ; // turn off |
WilliamMarshQMUL | 0:4374caa1ef17 | 45 | redThread.start(&red_thread) ; // start the red thread |
WilliamMarshQMUL | 0:4374caa1ef17 | 46 | greenThread.start(&green_thread) ; // start the green thread |
WilliamMarshQMUL | 0:4374caa1ef17 | 47 | |
WilliamMarshQMUL | 0:4374caa1ef17 | 48 | while (true) { |
WilliamMarshQMUL | 0:4374caa1ef17 | 49 | uint8_t d = tsi.readDistance() ; // Distance is between 0 and 39 |
WilliamMarshQMUL | 0:4374caa1ef17 | 50 | // When no touch --> 0 |
WilliamMarshQMUL | 0:4374caa1ef17 | 51 | // Left --> low value Right --> high value |
WilliamMarshQMUL | 0:4374caa1ef17 | 52 | pc.printf("%d", d) ; |
WilliamMarshQMUL | 1:e6ffa08ad8bf | 53 | pc.putc(' ') ; |
WilliamMarshQMUL | 0:4374caa1ef17 | 54 | if (d == 10) redThread.signal_set(0x1) ; |
WilliamMarshQMUL | 0:4374caa1ef17 | 55 | if (d == 20) greenThread.signal_set(0x1) ; |
WilliamMarshQMUL | 1:e6ffa08ad8bf | 56 | Thread::wait(200); // This polling rate is too slow - increase it |
WilliamMarshQMUL | 1:e6ffa08ad8bf | 57 | // The slower rate maks it easier to output on the terminal |
WilliamMarshQMUL | 0:4374caa1ef17 | 58 | } |
WilliamMarshQMUL | 0:4374caa1ef17 | 59 | } |