Diff: Watchdog/Watchdog.cpp

Revision:

2:50b1371247da

Parent:

1:38b385f34687

--- a/Watchdog/Watchdog.cpp	Tue Jun 25 23:49:40 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,131 +0,0 @@
-/// @file Watchdog.cpp provides the interface to the Watchdog module
-///
-/// This provides basic Watchdog service for the mbed. You can configure
-/// various timeout intervals that meet your system needs. Additionally,
-/// it is possible to identify if the Watchdog was the cause of any 
-/// system restart.
-/// 
-/// Adapted from Simon's Watchdog code from http://mbed.org/forum/mbed/topic/508/
-///
-/// @note Copyright © 2011 by Smartware Computing, all rights reserved.
-///     This software may be used to derive new software, as long as
-///     this copyright statement remains in the source file.
-/// @author David Smart
-///
-/// @note Copyright © 2015 by NBRemond, all rights reserved.
-///     This software may be used to derive new software, as long as
-///     this copyright statement remains in the source file.
-///
-///     Added support for STM32 Nucleo platforms
-///
-/// @author Bernaérd Remond
-///
-
-//#define LPC
-#define ST_NUCLEO
-
-
-#include "mbed.h"
-#include "Watchdog.h"
-
-
-/// Watchdog gets instantiated at the module level
-Watchdog::Watchdog() {
-#ifdef LPC    
-    wdreset = (LPC_WDT->WDMOD >> 2) & 1;    // capture the cause of the previous reset
-#endif
-#ifdef ST_NUCLEO
-    // capture the cause of the previous reset
-    /* Check if the system has resumed from IWDG reset */
-/*
-    if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST)) {
-        wdreset = true;
-    }
-    else {
-        wdreset = false; 
-    }
-*/       
-        printf("in constructor\r\n");
-        wdreset = false; 
-#endif
-
-}
-
-/// Load timeout value in watchdog timer and enable
-void Watchdog::Configure(float timeout) {
-#ifdef LPC    
-    LPC_WDT->WDCLKSEL = 0x1;                // Set CLK src to PCLK
-    uint32_t clk = SystemCoreClock / 16;    // WD has a fixed /4 prescaler, PCLK default is /4
-    LPC_WDT->WDTC = (uint32_t)(timeout * (float)clk);
-    LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset
-#endif  
- 
-#ifdef ST_NUCLEO
-    // see http://embedded-lab.com/blog/?p=9662    
-    #define LsiFreq (45000)
-    uint16_t PrescalerCode;
-    uint16_t Prescaler;
-    uint16_t ReloadValue;
-    float Calculated_timeout;
-    
-    if ((timeout * (LsiFreq/4)) < 0x7FF) {
-        PrescalerCode = IWDG_PRESCALER_4;
-        Prescaler = 4;
-    }
-    else if ((timeout * (LsiFreq/8)) < 0xFF0) {
-        PrescalerCode = IWDG_PRESCALER_8;
-        Prescaler = 8;
-    }
-    else if ((timeout * (LsiFreq/16)) < 0xFF0) {
-        PrescalerCode = IWDG_PRESCALER_16;
-        Prescaler = 16;
-    }
-    else if ((timeout * (LsiFreq/32)) < 0xFF0) {
-        PrescalerCode = IWDG_PRESCALER_32;
-        Prescaler = 32;
-    }
-    else if ((timeout * (LsiFreq/64)) < 0xFF0) {
-        PrescalerCode = IWDG_PRESCALER_64;
-        Prescaler = 64;
-    }
-    else if ((timeout * (LsiFreq/128)) < 0xFF0) {
-        PrescalerCode = IWDG_PRESCALER_128;
-        Prescaler = 128;
-    }
-    else {
-        PrescalerCode = IWDG_PRESCALER_256;
-        Prescaler = 256;
-    }
-    
-    // specifies the IWDG Reload value. This parameter must be a number between 0 and 0x0FFF.
-    ReloadValue = (uint32_t)(timeout * (LsiFreq/Prescaler));
-    
-    Calculated_timeout = ((float)(Prescaler * ReloadValue)) / LsiFreq;
-    printf("WATCHDOG set with prescaler:%d reload value: 0x%X - timeout:%f\n",Prescaler, ReloadValue, Calculated_timeout);
-    
-    IWDG->KR = 0x5555; //Disable write protection of IWDG registers      
-    IWDG->PR = PrescalerCode;      //Set PR value      
-    IWDG->RLR = ReloadValue;      //Set RLR value      
-    IWDG->KR = 0xAAAA;    //Reload IWDG      
-    IWDG->KR = 0xCCCC;    //Start IWDG - See more at: http://embedded-lab.com/blog/?p=9662#sthash.6VNxVSn0.dpuf       
-#endif
- 
-    Service();
-}
-
-/// "Service", "kick" or "feed" the dog - reset the watchdog timer
-/// by writing this required bit pattern
-void Watchdog::Service() {
-#ifdef LPC    
-    LPC_WDT->WDFEED = 0xAA;
-    LPC_WDT->WDFEED = 0x55;
-#endif    
-#ifdef ST_NUCLEO
-    IWDG->KR = 0xAAAA;         //Reload IWDG - See more at: http://embedded-lab.com/blog/?p=9662#sthash.6VNxVSn0.dpuf
-#endif
-}
-
-/// get the flag to indicate if the watchdog causes the reset
-bool Watchdog::WatchdogCausedReset() {
-    return wdreset;
-}