/**
* @brief Initialize the WWDG according to the specified.
* parameters in the WWDG_InitTypeDef of associated handle.
* @param hwwdg pointer to a WWDG_HandleTypeDef structure that contains
* the configuration information for the specified WWDG module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
{
/* Check the WWDG handle allocation */
if(hwwdg == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
assert_param(IS_WWDG_EWI_MODE(hwwdg->Init.EWIMode));
/* Init the low level hardware */
HAL_WWDG_MspInit(hwwdg);
/* Set WWDG Counter */
WRITE_REG(hwwdg->Instance->CR, (WWDG_CR_WDGA | hwwdg->Init.Counter));
/* Set WWDG Prescaler and Window */
WRITE_REG(hwwdg->Instance->CFR, (hwwdg->Init.EWIMode | hwwdg->Init.Prescaler | hwwdg->Init.Window));
/* Return function status */
return HAL_OK;
}
/**
* @brief Initializes the WWDG according to the specified
* parameters in the WWDG_InitTypeDef and creates the associated handle.
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
* the configuration information for the specified WWDG module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
{
/* Check the WWDG handle allocation */
if(hwwdg == HAL_NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
if(hwwdg->State == HAL_WWDG_STATE_RESET)
{
/* Init the low level hardware */
HAL_WWDG_MspInit(hwwdg);
}
/* Change WWDG peripheral state */
hwwdg->State = HAL_WWDG_STATE_BUSY;
/* Set WWDG Prescaler and Window */
MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
/* Set WWDG Counter */
MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
/* Change WWDG peripheral state */
hwwdg->State = HAL_WWDG_STATE_READY;
/* Return function status */
return HAL_OK;
}
/**
* @brief Initializes the WWDG according to the specified
* parameters in the WWDG_InitTypeDef and creates the associated handle.
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
* the configuration information for the specified WWDG module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
{
uint32_t tmp = 0;
/* Check the WWDG handle allocation */
if(hwwdg == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
if(hwwdg->State == HAL_WWDG_STATE_RESET)
{
/* Init the low level hardware */
HAL_WWDG_MspInit(hwwdg);
}
/* Change WWDG peripheral state */
hwwdg->State = HAL_WWDG_STATE_BUSY;
/* Set WWDG Prescaler and Window */
/* Get the CFR register value */
tmp = hwwdg->Instance->CFR;
/* Clear WDGTB[1:0] and W[6:0] bits */
tmp &= ((uint32_t)~(WWDG_CFR_WDGTB | WWDG_CFR_W));
/* Prepare the WWDG Prescaler and Window parameters */
tmp |= hwwdg->Init.Prescaler | hwwdg->Init.Window;
/* Write to WWDG CFR */
hwwdg->Instance->CFR = tmp;
/* Set WWDG Counter */
/* Get the CR register value */
tmp = hwwdg->Instance->CR;
/* Clear T[6:0] bits */
tmp &= (uint32_t)~((uint32_t)WWDG_CR_T);
/* Prepare the WWDG Counter parameter */
tmp |= (hwwdg->Init.Counter);
/* Write to WWDG CR */
hwwdg->Instance->CR = tmp;
/* Change WWDG peripheral state */
hwwdg->State = HAL_WWDG_STATE_READY;
/* Return function status */
return HAL_OK;
}
/**
* @brief Sets the WWDG Prescaler.
* @param WWDG_Prescaler: specifies the WWDG Prescaler.
* This parameter can be one of the following values:
* @arg WWDG_Prescaler_1: WWDG counter clock = (PCLK1/4096)/1
* @arg WWDG_Prescaler_2: WWDG counter clock = (PCLK1/4096)/2
* @arg WWDG_Prescaler_4: WWDG counter clock = (PCLK1/4096)/4
* @arg WWDG_Prescaler_8: WWDG counter clock = (PCLK1/4096)/8
* @retval None
*/
void WWDG_SetPrescaler(uint32_t WWDG_Prescaler) {
uint32_t tmpreg = 0;
/* Check the parameters */
assert_param(IS_WWDG_PRESCALER(WWDG_Prescaler));
/* Clear WDGTB[1:0] bits */
tmpreg = WWDG->CFR & CFR_WDGTB_MASK;
/* Set WDGTB[1:0] bits according to WWDG_Prescaler value */
tmpreg |= WWDG_Prescaler;
/* Store the new value */
WWDG->CFR = tmpreg;
}
/**
* @简述 设置 WWDG 预分频值.
* @参数 WWDG_Prescaler: 指定 WWDG 预分频值.
* 这个参数可以是下面的值之一:
* WWDG_Prescaler_1: WWDG 计数器时钟 = (PCLK1/4096)/1
* WWDG_Prescaler_2: WWDG 计数器时钟 = (PCLK1/4096)/2
* WWDG_Prescaler_4: WWDG 计数器时钟 = (PCLK1/4096)/4
* WWDG_Prescaler_8: WWDG 计数器时钟 = (PCLK1/4096)/8
* @返回 没有
*/
void WWDG_SetPrescaler(uint32_t WWDG_Prescaler)
{
uint32_t tmpreg = 0;
/* 检查参数 */
assert_param(IS_WWDG_PRESCALER(WWDG_Prescaler));
/* 清除 WDGTB[1:0] 位 */
tmpreg = WWDG->CFR & CFR_WDGTB_Mask;
/* 设置 WDGTB[1:0] 位，按照 WWDG_Prescaler 的值 */
tmpreg |= WWDG_Prescaler;
/* 存储新值 */
WWDG->CFR = tmpreg;
}
/*******************************************************************************
* Function Name : WWDG_SetPrescaler
* Description : Sets the WWDG Prescaler.
* Input : - WWDG_Prescaler: specifies the WWDG Prescaler.
* This parameter can be one of the following values:
* - WWDG_Prescaler_1: WWDG counter clock = (PCLK1/4096)/1
* - WWDG_Prescaler_2: WWDG counter clock = (PCLK1/4096)/2
* - WWDG_Prescaler_4: WWDG counter clock = (PCLK1/4096)/4
* - WWDG_Prescaler_8: WWDG counter clock = (PCLK1/4096)/8
* Output : None
* Return : None
*******************************************************************************/
void WWDG_SetPrescaler(u32 WWDG_Prescaler)
{
u32 tmpreg = 0;
/* Check the parameters */
assert(IS_WWDG_PRESCALER(WWDG_Prescaler));
/* Clear WDGTB[8:7] bits */
tmpreg = WWDG->CFR & CFR_WDGTB_Mask;
/* Set WDGTB[8:7] bits according to WWDG_Prescaler value */
tmpreg |= WWDG_Prescaler;
/* Store the new value */
WWDG->CFR = tmpreg;
}
/**
* @brief Initializes the WWDG according to the specified
* parameters in the WWDG_InitTypeDef and creates the associated handle.
* @param hwwdg : pointer to a WWDG_HandleTypeDef structure that contains
* the configuration information for the specified WWDG module.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
{
/* Check the WWDG handle allocation */
if(hwwdg == NULL)
{
return HAL_ERROR;
}
/* Check the parameters */
assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
if(hwwdg->State == HAL_WWDG_STATE_RESET)
{
/* Allocate lock resource and initialize it */
hwwdg->Lock = HAL_UNLOCKED;
/* Init the low level hardware */
HAL_WWDG_MspInit(hwwdg);
}
/* Take lock and change peripheral state */
__HAL_LOCK(hwwdg);
hwwdg->State = HAL_WWDG_STATE_BUSY;
/* Set WWDG Prescaler and Window and Counter*/
MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
/* Change peripheral state and release lock*/
hwwdg->State = HAL_WWDG_STATE_READY;
__HAL_UNLOCK(hwwdg);
/* Return function status */
return HAL_OK;
}
