Add IWDG as STM32.wdtEnable(timeout) / STM32.wdtReset()

Author: GrumpyOldPizza

cores/stm32l4/STM32.cpp

@@ -45,6 +45,13 @@ uint64_t STM32Class::getSerial()
     return (((uint64_t)serial0 << 16) | ((uint64_t)serial1 >> 16));
 }
 
+void STM32Class::getUID(uint32_t uid[3])
+{
+    uid[0] = *((uint32_t*)0x1fff7590);
+    uid[1] = *((uint32_t*)0x1fff7594);
+    uid[2] = *((uint32_t*)0x1fff7598);
+}
+
 float STM32Class::getVBAT()
 {
     int32_t vbat_data, vref_data, vrefint;
@@ -196,6 +203,17 @@ void STM32Class::reset()
     stm32l4_system_reset();
 }
 
+void  STM32Class::wdtEnable(uint32_t timeout)
+{
+    stm32l4_iwdg_enable(timeout);
+}
+
+void  STM32Class::wdtReset()
+{
+    stm32l4_iwdg_reset();
+}
+
+
 bool STM32Class::flashErase(uint32_t address, uint32_t count)
 {
     if (address & 2047) {

cores/stm32l4/STM32.h

@@ -56,6 +56,7 @@
 class STM32Class {
 public:
     uint64_t getSerial();
+    void getUID(uint32_t uid[3]);
 
     float getVBAT();
     float getVREF();
@@ -72,6 +73,9 @@ class STM32Class {
     void  shutdown(uint32_t pin, uint32_t mode, uint32_t timeout = 0);
     void  reset();
 
+    void  wdtEnable(uint32_t timeout);
+    void  wdtReset();
+
     bool  flashErase(uint32_t address, uint32_t count);
     bool  flashProgram(uint32_t address, const void *data, uint32_t count);
 

cores/stm32l4/stm32l4_wiring_private.h

@@ -51,6 +51,7 @@ extern "C" {
 #include "stm32l4_flash.h"
 #include "stm32l4_sdmmc.h"
 #include "stm32l4_sdspi.h"
+#include "stm32l4_iwdg.h"
 
 #define STM32L4_SVCALL_IRQ_PRIORITY  15
 #define STM32L4_PENDSV_IRQ_PRIORITY  15

system/STM32L4xx/Include/stm32l4_iwdg.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2017 Thomas Roell.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal with the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimers.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimers in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of Thomas Roell, nor the names of its contributors
+ *     may be used to endorse or promote products derived from this Software
+ *     without specific prior written permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * WITH THE SOFTWARE.
+ */
+
+#if !defined(_STM32L4_IWDG_H)
+#define _STM32L4_IWDG_H
+
+#include <stdint.h>
+
+#include "stm32l4xx.h"
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+extern void stm32l4_iwdg_enable(uint32_t timeout);
+
+static inline void stm32l4_iwdg_reset(void)
+{
+    IWDG->KR = 0xaaaa;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _STM32L4_NVIC_H */