75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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#include "iwdog.h"
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/*
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独立看门狗有一个40KHz的时钟，通过预分频值和重装载值来确定看门狗复位周期
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公式:
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Tout = ((4 × 2^prer) × rlr) / 40;
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Tout 为复位时间，单位是ms
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prer 为看门狗时钟预分频值，写入值是 0--7，是分频系数/4的幂数。例如: 4分频的值是0, 64 分频的 写入值是4
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rlr 是看门狗的重装载值
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*/
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//-------------------------------------------------------------------------------
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#define MAX_IWD_MS 6553
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#ifdef USE_STDPERIPH_DRIVER
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#define IWDG_PRE IWDG_Prescaler_4 // 4分频，分频后是0.1ms
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#endif
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#ifdef USE_FULL_LL_DRIVER
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#define IWDG_PRE LL_IWDG_PRESCALER_4 // 4分频，分频后是0.1ms
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#endif
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//-------------------------------------------------------------------------------
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void InitIWDog(u16 ms)
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{
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if (ms < MAX_IWD_MS)
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{
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ms *= 10;
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}
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else
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{
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ms = 65535;
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}
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#if (USE_IWDOG == 1)
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#ifdef USE_STDPERIPH_DRIVER
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IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable); // 取消寄存器写保护
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IWDG_SetPrescaler(IWDG_PRE); // 设置独立看门狗的预分频系数
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IWDG_SetReload(ms); // 设置独立看门狗的重装载值
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IWDG_ReloadCounter(); // 重载计数值, 第一次喂狗
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IWDG_Enable(); // 启动看门狗
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#endif
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#ifdef USE_FULL_LL_DRIVER
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LL_IWDG_EnableWriteAccess(IWDG); // 取消寄存器写保护
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LL_IWDG_SetPrescaler(IWDG, IWDG_PRE); // 设置独立看门狗的预分频系数
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LL_IWDG_SetWindow(IWDG, ms); // 设置窗口
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LL_IWDG_SetReloadCounter(IWDG, ms); // 设置独立看门狗的重装载值
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LL_IWDG_ReloadCounter(IWDG); // 重载计数值, 第一次喂狗
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LL_IWDG_Enable(IWDG); // 启动看门狗
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#endif
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#endif
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}
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void FeedIWDog(void)
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{
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#if (USE_IWDOG == 1)
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#ifdef USE_STDPERIPH_DRIVER
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IWDG_ReloadCounter();
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#endif
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#ifdef USE_FULL_LL_DRIVER
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LL_IWDG_ReloadCounter(IWDG);
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#endif
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#endif
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}
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