Library to control Dodge LX (83.3k) CAN devices
Dependencies: DodgeRadioLib EthernetWrapperLib OBDIILib mbed
WatchDogTimer.cpp@8:92e624c2841e, 2013-01-25 (annotated)
- Committer:
- rtgree01
- Date:
- Fri Jan 25 04:06:17 2013 +0000
- Revision:
- 8:92e624c2841e
- Parent:
- 5:46f139e53b15
Library to control Dodge LX (83.3k) CAN devices
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
rtgree01 |
1:90487a39d54e | 1 | #include "WatchDogTimer.h" |
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1:90487a39d54e | 2 | |
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1:90487a39d54e | 3 | void WatchDogTimer::kick(float s) |
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1:90487a39d54e | 4 | { |
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1:90487a39d54e | 5 | LPC_WDT->WDCLKSEL = 0x1; // Set CLK src to PCLK |
rtgree01 |
1:90487a39d54e | 6 | uint32_t clk = SystemCoreClock / 16; // WD has a fixed /4 prescaler, PCLK default is /4 |
rtgree01 |
1:90487a39d54e | 7 | LPC_WDT->WDTC = s * (float)clk; |
rtgree01 |
1:90487a39d54e | 8 | LPC_WDT->WDMOD = 0x3; // Enabled and Reset |
rtgree01 |
1:90487a39d54e | 9 | kick(); |
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1:90487a39d54e | 10 | } |
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1:90487a39d54e | 11 | |
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1:90487a39d54e | 12 | // "kick" or "feed" the dog - reset the watchdog timer |
rtgree01 |
1:90487a39d54e | 13 | // by writing this required bit pattern |
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1:90487a39d54e | 14 | void WatchDogTimer::kick() |
rtgree01 |
1:90487a39d54e | 15 | { |
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1:90487a39d54e | 16 | LPC_WDT->WDFEED = 0xAA; |
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1:90487a39d54e | 17 | LPC_WDT->WDFEED = 0x55; |
rtgree01 |
1:90487a39d54e | 18 | } |
rtgree01 |
2:e8b13ea2881b | 19 | |
rtgree01 |
2:e8b13ea2881b | 20 | // On reset, indicate a watchdog reset or a pushbutton reset |
rtgree01 |
2:e8b13ea2881b | 21 | bool WatchDogTimer::TimedOut() |
rtgree01 |
2:e8b13ea2881b | 22 | { |
rtgree01 |
2:e8b13ea2881b | 23 | return ((LPC_WDT->WDMOD >> 2) & 1); |
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5:46f139e53b15 | 24 | } |
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5:46f139e53b15 | 25 | |
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5:46f139e53b15 | 26 | void WatchDogTimer::Disable() |
rtgree01 |
5:46f139e53b15 | 27 | { |
rtgree01 |
5:46f139e53b15 | 28 | LPC_WDT->WDMOD = 0; |
rtgree01 |
2:e8b13ea2881b | 29 | } |