Fork of Smoothie to port to mbed non-LPC targets.
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Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_wdt.c
- Revision:
- 3:f151d08d335c
- Parent:
- 2:1df0b61d3b5a
diff -r 1df0b61d3b5a -r f151d08d335c libs/LPC17xx/LPC17xxLib/src/lpc17xx_wdt.c --- a/libs/LPC17xx/LPC17xxLib/src/lpc17xx_wdt.c Fri Feb 28 18:52:52 2014 -0800 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,271 +0,0 @@ -#ifdef __LPC17XX__ - -/********************************************************************** -* $Id$ lpc17xx_wdt.c 2010-05-21 -*//** -* @file lpc17xx_wdt.c -* @brief Contains all functions support for WDT firmware library -* on LPC17xx -* @version 2.0 -* @date 21. May. 2010 -* @author NXP MCU SW Application Team -* -* Copyright(C) 2010, NXP Semiconductor -* All rights reserved. -* -*********************************************************************** -* Software that is described herein is for illustrative purposes only -* which provides customers with programming information regarding the -* products. This software is supplied "AS IS" without any warranties. -* NXP Semiconductors assumes no responsibility or liability for the -* use of the software, conveys no license or title under any patent, -* copyright, or mask work right to the product. NXP Semiconductors -* reserves the right to make changes in the software without -* notification. NXP Semiconductors also make no representation or -* warranty that such application will be suitable for the specified -* use without further testing or modification. -**********************************************************************/ - -/* Peripheral group ----------------------------------------------------------- */ -/** @addtogroup WDT - * @{ - */ - -/* Includes ------------------------------------------------------------------- */ -#include "lpc17xx_wdt.h" -#include "lpc17xx_clkpwr.h" -#include "lpc17xx_pinsel.h" - - -/* If this source file built with example, the LPC17xx FW library configuration - * file in each example directory ("lpc17xx_libcfg.h") must be included, - * otherwise the default FW library configuration file must be included instead - */ -#ifdef __BUILD_WITH_EXAMPLE__ -#include "lpc17xx_libcfg.h" -#else -#include "lpc17xx_libcfg_default.h" -#endif /* __BUILD_WITH_EXAMPLE__ */ - - -#ifdef _WDT - -/* Private Functions ---------------------------------------------------------- */ - -static uint8_t WDT_SetTimeOut (uint8_t clk_source, uint32_t timeout); - -/********************************************************************//** - * @brief Set WDT time out value and WDT mode - * @param[in] clk_source select Clock source for WDT device - * @param[in] timeout value of time-out for WDT (us) - * @return None - *********************************************************************/ -static uint8_t WDT_SetTimeOut (uint8_t clk_source, uint32_t timeout) -{ - - uint32_t pclk_wdt = 0; - uint32_t tempval = 0; - - switch ((WDT_CLK_OPT) clk_source) - { - case WDT_CLKSRC_IRC: - pclk_wdt = 4000000; - // Calculate TC in WDT - tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); - // Check if it valid - if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) - { - LPC_WDT->WDTC = tempval; - return SUCCESS; - } - - break; - - case WDT_CLKSRC_PCLK: - - // Get WDT clock with CCLK divider = 4 - pclk_wdt = SystemCoreClock / 4; - // Calculate TC in WDT - tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); - - if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) - { - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_4); - LPC_WDT->WDTC = (uint32_t) tempval; - return SUCCESS; - } - - // Get WDT clock with CCLK divider = 2 - pclk_wdt = SystemCoreClock / 2; - // Calculate TC in WDT - tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); - - if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) - { - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_2); - LPC_WDT->WDTC = (uint32_t) tempval; - return SUCCESS; - } - - // Get WDT clock with CCLK divider = 1 - pclk_wdt = SystemCoreClock; - // Calculate TC in WDT - tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); - - if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) - { - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_1); - LPC_WDT->WDTC = (uint32_t) tempval; - return SUCCESS; - } - break ; - - - case WDT_CLKSRC_RTC: - pclk_wdt = 32768; - // Calculate TC in WDT - tempval = (((pclk_wdt) / WDT_US_INDEX) * (timeout / 4)); - // Check if it valid - if ((tempval >= WDT_TIMEOUT_MIN) && (tempval <= WDT_TIMEOUT_MAX)) - { - LPC_WDT->WDTC = (uint32_t) tempval; - return SUCCESS; - } - - break; - -// Error parameter - default: - break; -} - - return ERROR; -} - -/* End of Private Functions --------------------------------------------------- */ - - -/* Public Functions ----------------------------------------------------------- */ -/** @addtogroup WDT_Public_Functions - * @{ - */ - - -/*********************************************************************//** -* @brief Initial for Watchdog function -* Clock source = RTC , -* @param[in] ClkSrc Select clock source, should be: -* - WDT_CLKSRC_IRC: Clock source from Internal RC oscillator -* - WDT_CLKSRC_PCLK: Selects the APB peripheral clock (PCLK) -* - WDT_CLKSRC_RTC: Selects the RTC oscillator -* @param[in] WDTMode WDT mode, should be: -* - WDT_MODE_INT_ONLY: Use WDT to generate interrupt only -* - WDT_MODE_RESET: Use WDT to generate interrupt and reset MCU -* @return None - **********************************************************************/ -void WDT_Init (WDT_CLK_OPT ClkSrc, WDT_MODE_OPT WDTMode) -{ - CHECK_PARAM(PARAM_WDT_CLK_OPT(ClkSrc)); - CHECK_PARAM(PARAM_WDT_MODE_OPT(WDTMode)); - CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_WDT, CLKPWR_PCLKSEL_CCLK_DIV_4); - - //Set clock source - LPC_WDT->WDCLKSEL &= ~WDT_WDCLKSEL_MASK; - LPC_WDT->WDCLKSEL |= ClkSrc; - //Set WDT mode - if (WDTMode == WDT_MODE_RESET){ - LPC_WDT->WDMOD |= WDT_WDMOD(WDTMode); - } -} - -/*********************************************************************//** -* @brief Start WDT activity with given timeout value -* @param[in] TimeOut WDT reset after timeout if it is not feed -* @return None - **********************************************************************/ -void WDT_Start(uint32_t TimeOut) -{ - uint32_t ClkSrc; - - ClkSrc = LPC_WDT->WDCLKSEL; - ClkSrc &=WDT_WDCLKSEL_MASK; - WDT_SetTimeOut(ClkSrc,TimeOut); - //enable watchdog - LPC_WDT->WDMOD |= WDT_WDMOD_WDEN; - WDT_Feed(); -} - -/********************************************************************//** - * @brief Read WDT Time out flag - * @param[in] None - * @return Time out flag status of WDT - *********************************************************************/ -FlagStatus WDT_ReadTimeOutFlag (void) -{ - return ((FlagStatus)((LPC_WDT->WDMOD & WDT_WDMOD_WDTOF) >>2)); -} - -/********************************************************************//** - * @brief Clear WDT Time out flag - * @param[in] None - * @return None - *********************************************************************/ -void WDT_ClrTimeOutFlag (void) -{ - LPC_WDT->WDMOD &=~WDT_WDMOD_WDTOF; -} - -/********************************************************************//** - * @brief Update WDT timeout value and feed - * @param[in] TimeOut TimeOut value to be updated - * @return None - *********************************************************************/ -void WDT_UpdateTimeOut ( uint32_t TimeOut) -{ - uint32_t ClkSrc; - ClkSrc = LPC_WDT->WDCLKSEL; - ClkSrc &=WDT_WDCLKSEL_MASK; - WDT_SetTimeOut(ClkSrc,TimeOut); - WDT_Feed(); -} - - -/********************************************************************//** - * @brief After set WDTEN, call this function to start Watchdog - * or reload the Watchdog timer - * @param[in] None - * - * @return None - *********************************************************************/ -void WDT_Feed (void) -{ - // Disable irq interrupt - __disable_irq(); - LPC_WDT->WDFEED = 0xAA; - LPC_WDT->WDFEED = 0x55; - // Then enable irq interrupt - __enable_irq(); -} - -/********************************************************************//** - * @brief Get the current value of WDT - * @param[in] None - * @return current value of WDT - *********************************************************************/ -uint32_t WDT_GetCurrentCount(void) -{ - return LPC_WDT->WDTV; -} - -/** - * @} - */ - -#endif /* _WDT */ - -/** - * @} - */ - -/* --------------------------------- End Of File ------------------------------ */ -#endif /* __LPC17XX__ */