133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : ch32v30x_rng.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : This file provides all the RNG firmware functions.
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********************************************************************************/
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#include "ch32v30x_rng.h"
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#include "ch32v30x_rcc.h"
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/*******************************************************************************
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* Function Name : RNG_Cmd
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* Description : Enables or disables the RNG peripheral.
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* Input : NewState: ENABLE or DISABLE.
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* Return : None
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*******************************************************************************/
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void RNG_Cmd(FunctionalState NewState)
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{
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if (NewState != DISABLE)
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{
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RNG->CR |= RNG_CR_RNGEN;
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}
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else
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{
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RNG->CR &= ~RNG_CR_RNGEN;
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}
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}
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/*******************************************************************************
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* Function Name : RNG_GetRandomNumber
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* Description : Returns a 32-bit random number.
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* Input : None
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* Return : 32-bit random number.
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*******************************************************************************/
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uint32_t RNG_GetRandomNumber(void)
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{
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return RNG->DR;
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}
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/*******************************************************************************
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* Function Name : RNG_ITConfig
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* Description : Enables or disables the RNG interrupt.
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* Input : NewState: ENABLE or DISABLE.
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* Return : None
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*******************************************************************************/
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void RNG_ITConfig(FunctionalState NewState)
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{
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if (NewState != DISABLE)
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{
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RNG->CR |= RNG_CR_IE;
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}
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else
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{
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RNG->CR &= ~RNG_CR_IE;
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}
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}
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/*******************************************************************************
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* Function Name : RNG_GetFlagStatus
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* Description : Checks whether the specified RNG flag is set or not.
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* Input : RNG_FLAG: specifies the RNG flag to check.
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* RNG_FLAG_DRDY: Data Ready flag.
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* RNG_FLAG_CECS: Clock Error Current flag.
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* RNG_FLAG_SECS: Seed Error Current flag.
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* Return : bitstatus<75><73>SET or RESET.
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*******************************************************************************/
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FlagStatus RNG_GetFlagStatus(uint8_t RNG_FLAG)
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{
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FlagStatus bitstatus = RESET;
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if ((RNG->SR & RNG_FLAG) != (uint8_t)RESET)
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{
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bitstatus = SET;
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}
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else
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{
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bitstatus = RESET;
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}
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return bitstatus;
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}
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/*******************************************************************************
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* Function Name : RNG_ClearFlag
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* Description : Clears the RNG flags.
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* Input : RNG_FLAG: specifies the flag to clear.
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* RNG_FLAG_CECS: Clock Error Current flag.
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* RNG_FLAG_SECS: Seed Error Current flag.
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* Return : None
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*******************************************************************************/
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void RNG_ClearFlag(uint8_t RNG_FLAG)
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{
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RNG->SR = ~(uint32_t)(((uint32_t)RNG_FLAG) << 4);
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}
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/*******************************************************************************
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* Function Name : RNG_GetFlagStatus
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* Description : Checks whether the specified RNG interrupt has occurred or not.
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* Input : RNG_IT: specifies the RNG interrupt source to check.
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* RNG_IT_CEI: Clock Error Interrupt.
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* RNG_IT_SEI: Seed Error Interrupt.
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* Return : bitstatus<75><73>SET or RESET.
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*******************************************************************************/
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ITStatus RNG_GetITStatus(uint8_t RNG_IT)
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{
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ITStatus bitstatus = RESET;
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if ((RNG->SR & RNG_IT) != (uint8_t)RESET)
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{
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bitstatus = SET;
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}
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else
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{
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bitstatus = RESET;
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}
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return bitstatus;
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}
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/*******************************************************************************
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* Function Name : RNG_ClearITPendingBit
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* Description : Clears the RNG interrupt pending bit(s).
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* Input : RNG_IT: specifies the RNG interrupt pending bit(s) to clear.
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* RNG_IT_CEI: Clock Error Interrupt.
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* RNG_IT_SEI: Seed Error Interrupt.
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* Return : None
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*******************************************************************************/
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void RNG_ClearITPendingBit(uint8_t RNG_IT)
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{
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RNG->SR = (uint8_t)~RNG_IT;
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}
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