131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/**
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******************************************************************************
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* @brief IWDG functions of the firmware library.
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "gd32f10x_iwdg.h"
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/** @addtogroup GD32F10x_Firmware
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* @{
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*/
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/** @defgroup IWDG
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* @brief IWDG driver modules
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* @{
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*/
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/** @defgroup IWDG_Private_Variables
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* @{
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*/
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/* CTLR register bit mask */
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#define CTLR_KEY_RELOAD ((uint16_t)0xAAAA)
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#define CTLR_KEY_ENABLE ((uint16_t)0xCCCC)
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/**
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* @}
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*/
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/** @defgroup IWDG_Private_Functions
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* @{
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*/
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/**
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* @brief Enable or disable the IWDG_PSR, IWDG_RLDR and IWDG_WND write protection.
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* @param IWDG_WriteAccess: value to enable or disable the write access to registers.
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* This parameter can be one of the following values:
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* @arg IWDG_WRITEACCESS_ENABLE: Enable write access to IWDG_PSR, IWDG_RLDR and IWDG_WND registers
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* @arg IWDG_WRITEACCESS_DISABLE: Disable write access to IWDG_PSR, IWDG_RLDR and IWDG_WND registers
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* @retval None
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*/
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void IWDG_Write_Enable(uint16_t IWDG_WriteAccess)
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{
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IWDG->CTLR = IWDG_WriteAccess;
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}
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/**
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* @brief Set IWDG prescaler value.
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* @param PrescalerValue: IWDG Prescaler value.
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* This parameter can be one of the following values:
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* @arg IWDG_PRESCALER_4: IWDG prescaler set to 4
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* @arg IWDG_PRESCALER_8: IWDG prescaler set to 8
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* @arg IWDG_PRESCALER_16: IWDG prescaler set to 16
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* @arg IWDG_PRESCALER_32: IWDG prescaler set to 32
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* @arg IWDG_PRESCALER_64: IWDG prescaler set to 64
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* @arg IWDG_PRESCALER_128: IWDG prescaler set to 128
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* @arg IWDG_PRESCALER_256: IWDG prescaler set to 256
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* @retval None
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*/
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void IWDG_SetPrescaler(uint8_t PrescalerValue)
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{
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IWDG->PSR = PrescalerValue;
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}
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/**
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* @brief Set independent watchdog counter reload value.
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* @param ReloadValue: IWDG Reload value.
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* This parameter must be between 0 and 0x0FFF.
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* @retval None
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*/
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void IWDG_SetReloadValue(uint16_t ReloadValue)
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{
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IWDG->RLDR = ReloadValue;
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}
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/**
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* @brief Reload the counter.
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* @param None
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* @retval None
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*/
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void IWDG_ReloadCounter(void)
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{
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IWDG->CTLR = CTLR_KEY_RELOAD;
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}
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/**
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* @brief Start the independent watchdog counter.
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* @param None
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* @retval None
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*/
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void IWDG_Enable(void)
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{
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IWDG->CTLR = CTLR_KEY_ENABLE;
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}
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/**
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* @brief Check registers' bit state.
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* @param IWDG_FLAG: the flag to check.
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* This parameter can be one of the following values:
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* @arg IWDG_BIT_PUD: A write operation to IWDG_PSR register on going
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* @arg IWDG_BIT_RUD: A write operation to IWDG_RLDR register on going
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* @arg IWDG_BIT_WUD: A write operation to IWDG_WND register on going
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* @retval The new state of IWDG_FLAG (SET or RESET).
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*/
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TypeState IWDG_GetBitState(uint16_t IWDG_FLAG)
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{
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if ((IWDG->STR & IWDG_FLAG) != (uint32_t)RESET) {
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return SET;
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} else {
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return RESET;
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}
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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