Luth Haroon / SD_modified

SD card interface

Watchdog/watchdog.cpp@0:22612ae617a0, 2012-10-08 (annotated)

Committer:
lharoon
Date:
Mon Oct 08 11:14:07 2012 +0000
Revision:
0:22612ae617a0
1st edition

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lharoon 0:22612ae617a0 1 #include "mbed.h"
lharoon 0:22612ae617a0 2
lharoon 0:22612ae617a0 3 // Loads watchdog timer with TC value
lharoon 0:22612ae617a0 4 void feed() {
lharoon 0:22612ae617a0 5 LPC_WWDT->FEED = 0xAA;
lharoon 0:22612ae617a0 6 LPC_WWDT->FEED = 0x55;
lharoon 0:22612ae617a0 7 }
lharoon 0:22612ae617a0 8
lharoon 0:22612ae617a0 9 // Ref. UM10462.pdf chapter 17
lharoon 0:22612ae617a0 10 void WDTInit() {
lharoon 0:22612ae617a0 11 // Power on interface...
lharoon 0:22612ae617a0 12 LPC_SYSCON->SYSAHBCLKCTRL |= (0x1 << 15);
lharoon 0:22612ae617a0 13
lharoon 0:22612ae617a0 14 // Power on watchdog oscillator
lharoon 0:22612ae617a0 15 LPC_SYSCON->PDRUNCFG &= 0x3F;
lharoon 0:22612ae617a0 16
lharoon 0:22612ae617a0 17 // Select watchdog oscillator for WWDT clock source
lharoon 0:22612ae617a0 18 LPC_WWDT->CLKSEL = 0x1;
lharoon 0:22612ae617a0 19
lharoon 0:22612ae617a0 20 uint32_t clk = SystemCoreClock / 16;
lharoon 0:22612ae617a0 21 LPC_WWDT->TC = 0xfff;//10 * clk;
lharoon 0:22612ae617a0 22
lharoon 0:22612ae617a0 23 // Enable WWDT. The timer will not begin until the
lharoon 0:22612ae617a0 24 // proper feed sequence is loaded.
lharoon 0:22612ae617a0 25 LPC_WWDT->MOD = 0x3;
lharoon 0:22612ae617a0 26
lharoon 0:22612ae617a0 27 feed();
lharoon 0:22612ae617a0 28 #if 0
lharoon 0:22612ae617a0 29 printf("CLKSEL->0x%x TC->0x%x MOD->0x%x FEED->0x%x\n", LPC_WWDT->CLKSEL, LPC_WWDT->TC, LPC_WWDT->MOD, LPC_WWDT->FEED);
lharoon 0:22612ae617a0 30 printf("clk->%d\n", clk);
lharoon 0:22612ae617a0 31 #endif
lharoon 0:22612ae617a0 32 }