deni setiawan
/
Watchdog_sample_nocoverage_part2
part 2
Fork of Watchdog_sample_nocoverage by
main.cpp
- Committer:
- dhenis
- Date:
- 2018-03-09
- Revision:
- 6:658d42dab71d
- Parent:
- 3:32a940251192
File content as of revision 6:658d42dab71d:
#include "mbed.h" #include "rtos.h" #include "wdt.h" // Sample program using the Watchdog // --------------------------------- // * Three threads co-operate to flash two LEDs // * A simple way to inject a fault, by pressing a button // * The watchdog is configured with a 32ms timeout #define ON 1 #define OFF 0 DigitalOut led_red(LED_RED, ON); DigitalIn button(PTD0, PullUp); DigitalOut led1(PTC12, OFF); DigitalOut led2(PTC13, OFF); // Ticker for reading analog AnalogIn ain(A0) ; char vstring[] = "X.XX\r\n" ; Serial pc(USBTX, USBRX); // tx, rx, for debugging // This ticker is used to feed the watch dog Ticker tick; int oke = 0; // Threads Thread threadT(osPriorityNormal, 1000) ; // timer thread Thread threadLED1(osPriorityNormal, 1000) ; // thread LED1 Thread threadLED2(osPriorityNormal, 1000) ; // thread LED2 // ------------Fault Injection Button------------- // Wait while the button is down // Use this to simulate a STUCK fault // ----------------------------------------------- void waitButton() { oke =1; while (!button) { }; } // ---Thread for controlling LED 1---------------- // Turn LED1 on/off in response to signals // ----------------------------------------------- void led1_thread() { // method to run in thread osEvent evt ; while (true) { evt = Thread::signal_wait(0x0); // wait for any signal wdt_kickA(); if (evt.status == osEventSignal) { if (evt.value.signals & 0x01) led1 = ON ; if (evt.value.signals & 0x02) led1 = OFF ; } // waitButton() ; // POSSIBLE FAULT HERE } } // ---Thread for controlling LED 2---------------- // Turn LED2 on/off in response to signals // ----------------------------------------------- void led2_thread() { // method to run in thread osEvent evt ; while (true) { evt = Thread::signal_wait(0x0); // wait for any signal wdt_kickB(); if (evt.status == osEventSignal) { if (evt.value.signals & 0x01) led2 = ON ; if (evt.value.signals & 0x02) led2 = OFF ; //wdt_kickA(); } waitButton() ; // POSSIBLE FAULT HERE } } // ---Thread for timing -------------------------- // Send signals to the other threads // ----------------------------------------------- void timer_thread() { // method to run in thread while (true) { Thread::wait(250) ; threadLED1.signal_set(0x1) ; threadLED2.signal_set(0x1) ; Thread::wait(250) ; threadLED1.signal_set(0x2) ; threadLED2.signal_set(0x2) ; //tick.attach_us(callback(&wdt_kick_all), 20000); // ticks every 20ms // waitButton() ; // POSSIBLE FAULT HERE } } // -----------MAIN------------------------------- // Configure watchdog. Start threads. // Show start up with RED for 1sec // Remember the watchdog is running // - 1024ms to set it once // - then must feed it every 32ms // ---------------------------------------------- int main(void) { wdt_1sec() ; // initialise watchdog - 32ms timeout //wdt_32ms(); //tick.attach_us(callback(&wdt_kick_all), 20000); // ticks every 20ms // start threads threadT.start(&timer_thread) ; // start the timer thread threadLED1.start(&led1_thread) ; // start the LED1 control thread threadLED2.start(&led2_thread) ; // start the LED2 control thread // show start-up led_red = OFF; Thread::wait(1000) ; led_red = ON; }