Ryan Greene
Dodge/Chrysler Radio Emulator Connect to Interior CAN bus
Dependencies: mbed SDFileSystem
WatchDogTimer.cpp@0:9bc41d70bdd3, 2011-01-31 (annotated)
- Committer:
- rtgree01
- Date:
- Mon Jan 31 05:13:04 2011 +0000
- Revision:
- 0:9bc41d70bdd3
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| rtgree01 | 0:9bc41d70bdd3 | 1 | #include "WatchDogTimer.h" |
| rtgree01 | 0:9bc41d70bdd3 | 2 | |
| rtgree01 | 0:9bc41d70bdd3 | 3 | void WatchDogTimer::kick(float s) |
| rtgree01 | 0:9bc41d70bdd3 | 4 | { |
| rtgree01 | 0:9bc41d70bdd3 | 5 | LPC_WDT->WDCLKSEL = 0x1; // Set CLK src to PCLK |
| rtgree01 | 0:9bc41d70bdd3 | 6 | uint32_t clk = SystemCoreClock / 16; // WD has a fixed /4 prescaler, PCLK default is /4 |
| rtgree01 | 0:9bc41d70bdd3 | 7 | LPC_WDT->WDTC = s * (float)clk; |
| rtgree01 | 0:9bc41d70bdd3 | 8 | LPC_WDT->WDMOD = 0x3; // Enabled and Reset |
| rtgree01 | 0:9bc41d70bdd3 | 9 | kick(); |
| rtgree01 | 0:9bc41d70bdd3 | 10 | } |
| rtgree01 | 0:9bc41d70bdd3 | 11 | |
| rtgree01 | 0:9bc41d70bdd3 | 12 | // "kick" or "feed" the dog - reset the watchdog timer |
| rtgree01 | 0:9bc41d70bdd3 | 13 | // by writing this required bit pattern |
| rtgree01 | 0:9bc41d70bdd3 | 14 | void WatchDogTimer::kick() |
| rtgree01 | 0:9bc41d70bdd3 | 15 | { |
| rtgree01 | 0:9bc41d70bdd3 | 16 | LPC_WDT->WDFEED = 0xAA; |
| rtgree01 | 0:9bc41d70bdd3 | 17 | LPC_WDT->WDFEED = 0x55; |
| rtgree01 | 0:9bc41d70bdd3 | 18 | } |