m b / Mbed 2 deprecated 4180Lab1

Complete

Dependencies:   mbed

wdt.h@0:8f5b2af5e1d5, 2016-01-30 (annotated)

Committer:
mikeb
Date:
Sat Jan 30 02:21:04 2016 +0000
Revision:
0:8f5b2af5e1d5
Combining Functions;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mikeb 0:8f5b2af5e1d5 1 #include "mbed.h"
mikeb 0:8f5b2af5e1d5 2
mikeb 0:8f5b2af5e1d5 3 //----------------------------
mikeb 0:8f5b2af5e1d5 4 //Watchdog class
mikeb 0:8f5b2af5e1d5 5 class Watchdog {
mikeb 0:8f5b2af5e1d5 6 public:
mikeb 0:8f5b2af5e1d5 7
mikeb 0:8f5b2af5e1d5 8 //Directions on how to use this stuff can be found in the lpc1768 user manual.
mikeb 0:8f5b2af5e1d5 9 //LPC_WDT is the "Register set", -> is the register, 0x is the hex value to write
mikeb 0:8f5b2af5e1d5 10 //Can also use 0B to write binary, or just base 10 by =
mikeb 0:8f5b2af5e1d5 11 //Chip has multiple clock sources, critical to understand for low power modes. This WDT uses the main system clock
mikeb 0:8f5b2af5e1d5 12
mikeb 0:8f5b2af5e1d5 13 void kick(float timeToReset) {
mikeb 0:8f5b2af5e1d5 14 LPC_WDT->WDCLKSEL = 0x1;
mikeb 0:8f5b2af5e1d5 15 uint32_t clk = SystemCoreClock / 16;
mikeb 0:8f5b2af5e1d5 16 LPC_WDT->WDTC = timeToReset * (float)clk;
mikeb 0:8f5b2af5e1d5 17 LPC_WDT->WDMOD = 0x3;
mikeb 0:8f5b2af5e1d5 18 kick();
mikeb 0:8f5b2af5e1d5 19 }
mikeb 0:8f5b2af5e1d5 20 void kick() {
mikeb 0:8f5b2af5e1d5 21 LPC_WDT->WDFEED = 0xAA;
mikeb 0:8f5b2af5e1d5 22 LPC_WDT->WDFEED = 0x55;
mikeb 0:8f5b2af5e1d5 23 }
mikeb 0:8f5b2af5e1d5 24 };
mikeb 0:8f5b2af5e1d5 25
mikeb 0:8f5b2af5e1d5 26 //--------------------------------------
mikeb 0:8f5b2af5e1d5 27 /*Insert in code
mikeb 0:8f5b2af5e1d5 28 Watchdog wdt; //Create object
mikeb 0:8f5b2af5e1d5 29
mikeb 0:8f5b2af5e1d5 30
mikeb 0:8f5b2af5e1d5 31
mikeb 0:8f5b2af5e1d5 32 byte lockUpCounter = 0; //Simulate a lockup, use a byte because ti consumes less memory
mikeb 0:8f5b2af5e1d5 33
mikeb 0:8f5b2af5e1d5 34
mikeb 0:8f5b2af5e1d5 35 if (lockUpCounter > 100){ //Simulated lockup
mikeb 0:8f5b2af5e1d5 36 while(1);
mikeb 0:8f5b2af5e1d5 37 }
mikeb 0:8f5b2af5e1d5 38 lockUpCounter++;
mikeb 0:8f5b2af5e1d5 39
mikeb 0:8f5b2af5e1d5 40 wdt.kick; //Reset WDT
mikeb 0:8f5b2af5e1d5 41
mikeb 0:8f5b2af5e1d5 42 //------------------------------------
mikeb 0:8f5b2af5e1d5 43 // Assembly stuff
mikeb 0:8f5b2af5e1d5 44
mikeb 0:8f5b2af5e1d5 45 //Attach file
mikeb 0:8f5b2af5e1d5 46 //extern "C" int my_asm(int value);
mikeb 0:8f5b2af5e1d5 47 //my_asm(value);
mikeb 0:8f5b2af5e1d5 48 //----------------
mikeb 0:8f5b2af5e1d5 49 //Thisw goes in separate ASM file
mikeb 0:8f5b2af5e1d5 50
mikeb 0:8f5b2af5e1d5 51 */