feat: KT mBMS 펌웨어 3종(HW1/2/3) 및 통합 빌드 환경 초기 커밋 (V4.0.0.1)

mBMS_APP_V3117/HARDWARE/iwdg.c

@@ -0,0 +1,55 @@
+#include "iwdg.h"
+#include "stm32f4xx_iwdg.h"
+//////////////////////////////////////////////////////////////////////////////////	 
+//This program is for educational purposes only, without the author's permission, may not be used for any other purpose
+//ALIENTEK STM32F407 Development Board
+//Independent watch-dog driver code	   
+//Hot Atomic @ALIENTEK
+//Forum: www.openedv.com
+//Date created: 2015/9/1
+//Version: V1.0
+//All rights reserved pirated reserved.
+//Copyright(C) Guangzhou wing electronic technology limited company 2014-2024
+//All rights reserved									  
+////////////////////////////////////////////////////////////////////////////////// 	
+
+//Initialize watch-dog
+void IWDG_Init(void)
+{
+    /* IWDG timeout equal to 250 ms (the timeout may varies due to LSI frequency
+     dispersion) */
+    /* Enable write access to IWDG_PR and IWDG_RLR registers */
+    IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
+    
+    /* IWDG counter clock: 40KHz(LSI) / 128 = 312.5 Hz : 3.2ms */
+    /* 0.8ms ~ 3276.8ms */
+    // IWDG_Prescaler_4,  0, 0.1,   409.6 
+    // IWDG_Prescaler_8,  1, 0.2,   819.2 
+    // IWDG_Prescaler_16, 2, 0.4,  1638.4 
+    // IWDG_Prescaler_32, 3, 0.8,  3276.8 
+    // IWDG_Prescaler_64, 4, 1.6,  6553.6 
+    // IWDG_Prescaler_128 5, 3.2, 13107.2 
+    // IWDG_Prescaler_256 6, 6.4, 26214.4 
+
+    /* IWDG counter clock: LSI/128 */
+    IWDG_SetPrescaler(IWDG_Prescaler_128);
+    
+    /* Set counter reload value to obtain 250ms IWDG TimeOut.
+     Counter Reload Value = 1000ms / IWDG counter clock period 
+                          = 1000ms / (LSI/128)
+                          = 
+    
+     Counter Reload Value = 250ms/IWDG counter clock period 
+                          = 250ms / (LSI/32)
+                          = 0.25s / (LsiFreq/32)
+                          = LsiFreq/(32 * 4)
+                          = LsiFreq/128
+    */
+    IWDG_SetReload(1000);
+    
+    /* Reload IWDG counter */
+    IWDG_ReloadCounter();
+    
+    /* Enable IWDG (the LSI oscillator will be enabled by hardware) */
+    IWDG_Enable();
+}