亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频

蟲蟲首頁| 資源下載| 資源專輯| 精品軟件
登錄| 注冊

您現(xiàn)在的位置是:蟲蟲下載站 > 資源下載 > C/C++語言編程 > 基于(英蓓特)STM32V100的看門狗程序

基于(英蓓特)STM32V100的看門狗程序

  • 資源大?。?/b>391 K
  • 上傳時間: 2013-11-11
  • 上傳用戶:wenyishizhu
  • 資源積分:2 下載積分
  • 標      簽: V100 STM 100 32V

資 源 簡 介

This example shows how to update at regulate period the WWDG counter using the
Early Wakeup interrupt (EWI).

The WWDG timeout is set to 262ms, refresh window set to 41h and the EWI is
enabled. When the WWDG counter reaches 40h the EWI is generated and in the WWDG
ISR the counter is refreshed to prevent a WWDG reset and led connected to PC.07
is toggled.
The EXTI line9 is connected to PB.09 pin and configured to generate an interrupt
on falling edge.
In the NVIC, EXTI line9 to 5 interrupt vector is enabled with priority equal to 0
and the WWDG interrupt vector is enabled with priority equal to 1 (EXTI IT > WWDG IT).

The EXTI Line9 will be used to simulate a software failure: once the EXTI line9
event occurs (by pressing Key push-button on EVAL board) the correspondent interrupt
is served, in the ISR the led connected to PC.07 is turned off and the EXTI line9
pending bit is not cleared. So the CPU will execute indefinitely EXTI line9 ISR and
the WWDG ISR will never be entered(WWDG counter not updated). As result, when the
WWDG counter falls to 3Fh the WWDG reset occurs.
If the EXTI line9 event don抰 occurs the WWDG counter is indefinitely refreshed in
the WWDG ISR which prevent from WWDG reset.

If the WWDG reset is generated, after resuming from reset a led connected to PC.06
is turned on.

In this example the system is clocked by the HSE(8MHz).

相 關 資 源

主站蜘蛛池模板: 萨嘎县| 福清市| 盐山县| 库尔勒市| 垣曲县| 鹤山市| 无锡市| 阿拉善左旗| 赤城县| 凤山市| 南宫市| 海兴县| 西充县| 阿坝县| 吴江市| 通州市| 梁山县| 苗栗县| 淮南市| 镇康县| 延津县| 綦江县| 固原市| 长寿区| 平阴县| 定日县| 乐至县| 屯留县| 西平县| 平原县| 龙陵县| 西盟| 抚州市| 和平县| 莆田市| 桦南县| 安西县| 青冈县| 驻马店市| 夏津县| 玉环县|