Alisa Allaire / Mbed 2 deprecated 4180L1_P1WD

j

Dependencies:   mbed

main.cpp@1:f37bf2328d79, 2018-01-18 (annotated)

Committer:
aallaire3
Date:
Thu Jan 18 20:10:21 2018 +0000
Revision:
1:f37bf2328d79
Parent:
0:947209d21c35 
j

Who changed what in which revision?

UserRevisionLine numberNew contents of line
aallaire3 0:947209d21c35 1 #include "mbed.h"
aallaire3 0:947209d21c35 2
aallaire3 0:947209d21c35 3 DigitalOut redLed(p21);
aallaire3 0:947209d21c35 4 DigitalIn pb(p8); // Pushbutton for redLed
aallaire3 0:947209d21c35 5 DigitalOut led1(LED1);
aallaire3 0:947209d21c35 6 DigitalOut led3(LED3);
aallaire3 0:947209d21c35 7
aallaire3 0:947209d21c35 8 void kick() {
aallaire3 0:947209d21c35 9 LPC_WDT->WDFEED = 0xAA;
aallaire3 0:947209d21c35 10 LPC_WDT->WDFEED = 0x55;
aallaire3 0:947209d21c35 11 }
aallaire3 0:947209d21c35 12
aallaire3 0:947209d21c35 13 void kick(float s) {
aallaire3 0:947209d21c35 14 LPC_WDT -> WDCLKSEL = 0x1;
aallaire3 0:947209d21c35 15 uint32_t clk = SystemCoreClock/16;
aallaire3 0:947209d21c35 16 LPC_WDT->WDTC = s * (float)clk;
aallaire3 0:947209d21c35 17 LPC_WDT->WDMOD = 0x3;
aallaire3 0:947209d21c35 18 kick();
aallaire3 0:947209d21c35 19 }
aallaire3 0:947209d21c35 20
aallaire3 0:947209d21c35 21
aallaire3 0:947209d21c35 22
aallaire3 0:947209d21c35 23 int main() {
aallaire3 0:947209d21c35 24 int count = 0;
aallaire3 0:947209d21c35 25 // Use internal pullup for pushbutton
aallaire3 0:947209d21c35 26 pb.mode(PullUp);
aallaire3 0:947209d21c35 27
aallaire3 0:947209d21c35 28 // Delay for initial pullup to take effect
aallaire3 0:947209d21c35 29 wait(.001);
aallaire3 0:947209d21c35 30
aallaire3 1:f37bf2328d79 31 // Indicate watchdog timer reset
aallaire3 0:947209d21c35 32 if((LPC_WDT->WDMOD >> 2) & 1) {
aallaire3 0:947209d21c35 33 led1 = 1;
aallaire3 1:f37bf2328d79 34 }
aallaire3 0:947209d21c35 35
aallaire3 0:947209d21c35 36 kick(5); // 5 second timeout
aallaire3 0:947209d21c35 37 while(1) {
aallaire3 0:947209d21c35 38 redLed = !pb;
aallaire3 0:947209d21c35 39 led3 = 1;
aallaire3 1:f37bf2328d79 40 // Simulate a fault lockup with infinite loop after a bunch of iterations
aallaire3 0:947209d21c35 41 if (count == 1000000) {
aallaire3 0:947209d21c35 42 while(1){
aallaire3 0:947209d21c35 43
aallaire3 0:947209d21c35 44 }
aallaire3 0:947209d21c35 45 }
aallaire3 0:947209d21c35 46 led3 = 0; // led will stay on during fault
aallaire3 0:947209d21c35 47 count++;
aallaire3 0:947209d21c35 48 kick();
aallaire3 0:947209d21c35 49 }
aallaire3 0:947209d21c35 50 }