Diff: main.cpp

Revision:

1:053449444c29

Parent:

0:8e1b0b607dc3

--- a/main.cpp	Tue Dec 01 15:45:13 2015 +0000
+++ b/main.cpp	Tue Dec 08 14:27:53 2015 +0000
@@ -1,39 +1,43 @@
 #include "mbed.h"
- 
-InterruptIn event(USER_BUTTON);
-DigitalOut myled(LED1);
- 
-int go_to_sleep = 0;
- 
-void pressed()
-{
-    printf("Button pressed\n");
-    go_to_sleep = !go_to_sleep;
-}
- 
+
+ #define IWDG_START 0x0000CCCC
+ #define IWDG_WRITE_ACCESS 0x00005555
+ #define IWDG_PR_PR_0 7
+ #define IWDG_RELOAD 512*60
+ #define IWDG_REFRESH 0xAAAA
+ DigitalOut myled(LED1);
 int main()
 {
+    /* (1) Activate IWDG (not needed if done in option bytes) */
+    /* (2) Enable write access to IWDG registers */
+    /* (3) Set prescaler by 8 */
+    /* (4) Set reload value to have a rollover each 100ms */
+    /* (5) Check if flags are reset */
+    /* (6) Refresh counter */
+    RCC_OscInitTypeDef RCC_OscInitStruct;
+    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
+    RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_0;
+    HAL_RCC_OscConfig(&RCC_OscInitStruct);
     
-    HAL_PWR_EnableWakeUpPin(USER_BUTTON);
-    int i = 0;
- 
-    //event.fall(&pressed);
- 
-    while (1) {
-        event.fall(&pressed);
-        if (go_to_sleep) {
-            //myled = 1;
-            printf("%d: Entering sleep (press user button to resume)\n", i);
-            //sleep();
-            //deepsleep();
-            HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFI);
-            
-            //wait(0.1);
-        } else {
-            printf("%d: Running\n", i);
-            myled = !myled;
-            wait(1.0);
-        }
-        i++;
+    IWDG->KR=IWDG_START;
+    wait(5);
+    IWDG->KR=IWDG_WRITE_ACCESS;
+    IWDG->PR=IWDG_PR_PR_0;
+    IWDG->RLR=IWDG_RELOAD;
+    while(IWDG->SR) { 
+        wait(0.1);   
     }
-}
+    //SwitchFromPLLtoHSI();
+    //RCC->CFGR = (
+    //0x00008000
+    myled = 1;
+    wait(3);
+    myled = 0;
+    wait(10);
+   IWDG->KR=IWDG_REFRESH;/* (6) */
+    //HAL_PWR_EnterSTOPMode(PWR_MAINREGULATOR_ON, PWR_STOPENTRY_WFI);
+    deepsleep();
+    while(1) {
+        
+    }
+}
\ No newline at end of file