145 lines
3.3 KiB
C
145 lines
3.3 KiB
C
/*!
|
|
\file gd32f4xx_trng.c
|
|
\brief TRNG driver
|
|
*/
|
|
|
|
/*
|
|
Copyright (C) 2016 GigaDevice
|
|
|
|
2016-08-15, V1.0.0, firmware for GD32F4xx
|
|
*/
|
|
|
|
#include "gd32f4xx_trng.h"
|
|
|
|
/*!
|
|
\brief deinitialize the TRNG
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_deinit(void)
|
|
{
|
|
rcu_periph_reset_enable(RCU_TRNGRST);
|
|
rcu_periph_reset_disable(RCU_TRNGRST);
|
|
}
|
|
|
|
/*!
|
|
\brief enable the TRNG interface
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_enable(void)
|
|
{
|
|
TRNG_CTL |= TRNG_CTL_TRNGEN;
|
|
}
|
|
|
|
/*!
|
|
\brief disable the TRNG interface
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_disable(void)
|
|
{
|
|
TRNG_CTL &= ~TRNG_CTL_TRNGEN;
|
|
}
|
|
|
|
/*!
|
|
\brief get the true random data
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval the generated random data
|
|
*/
|
|
uint32_t trng_get_true_random_data(void)
|
|
{
|
|
return (TRNG_DATA);
|
|
}
|
|
|
|
/*!
|
|
\brief get the trng status flags
|
|
\param[in] flag: trng status flag, refer to trng_flag_enum
|
|
only one parameter can be selected which is shown as below:
|
|
\arg TRNG_FLAG_DRDY: Random Data ready status
|
|
\arg TRNG_FLAG_CECS: Clock error current status
|
|
\arg TRNG_FLAG_SECS: Seed error current status
|
|
\param[out] none
|
|
\retval FlagStatus: SET or RESET
|
|
*/
|
|
FlagStatus trng_flag_get(trng_flag_enum flag)
|
|
{
|
|
if(RESET != (TRNG_STAT & flag)){
|
|
return SET;
|
|
}else{
|
|
return RESET;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
\brief clear the trng status flags
|
|
\param[in] flag: the special status flag
|
|
only one parameter can be selected which is shown as below:
|
|
\arg TRNG_FLAG_CECS: Clock error current status
|
|
\arg TRNG_FLAG_SECS: Seed error current status
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_flag_clear(trng_flag_enum flag)
|
|
{
|
|
TRNG_STAT &= ~(uint32_t)flag;
|
|
}
|
|
|
|
/*!
|
|
\brief enable the TRNG interrupt
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_interrupt_enable(void)
|
|
{
|
|
TRNG_CTL |= TRNG_CTL_IE;
|
|
}
|
|
|
|
/*!
|
|
\brief disable the TRNG interrupt
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_interrupt_disable(void)
|
|
{
|
|
TRNG_CTL &= ~TRNG_CTL_IE;
|
|
}
|
|
|
|
/*!
|
|
\brief get the trng interrupt flags
|
|
\param[in] int_flag: trng interrupt flag, refer to trng_int_flag_enum
|
|
only one parameter can be selected which is shown as below:
|
|
\arg TRNG_INT_FLAG_CEIF: clock error interrupt flag
|
|
\arg TRNG_INT_FLAG_SEIF: Seed error interrupt flag
|
|
\param[out] none
|
|
\retval FlagStatus: SET or RESET
|
|
*/
|
|
FlagStatus trng_interrupt_flag_get(trng_int_flag_enum int_flag)
|
|
{
|
|
if(RESET != (TRNG_STAT & int_flag)){
|
|
return SET;
|
|
}else{
|
|
return RESET;
|
|
}
|
|
}
|
|
|
|
/*!
|
|
\brief clear the trng interrupt flags
|
|
\param[in] int_flag: trng interrupt flag, refer to trng_int_flag_enum
|
|
only one parameter can be selected which is shown as below:
|
|
\arg TRNG_INT_FLAG_CEIF: clock error interrupt flag
|
|
\arg TRNG_INT_FLAG_SEIF: Seed error interrupt flag
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void trng_interrupt_flag_clear(trng_int_flag_enum int_flag)
|
|
{
|
|
TRNG_STAT &= ~(uint32_t)int_flag;
|
|
}
|