/*!
\brief main function
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
/* system clocks configuration */
irc40k_config();
systick_config();
gd_eval_ledinit(LED2);
gd_eval_keyinit(KEY_TAMPER,KEY_MODE_EXTI);
delay_1ms(50);
/* enable write access to FWDGT_PSC and FWDGT_RLD registers.
FWDGT counter clock: 40KHz(IRC40K) / 64 = 0.625 KHz */
fwdgt_config(625,FWDGT_PSC_DIV64);
fwdgt_enable();
/* check if the system has resumed from FWDGT reset */
if (RESET != rcu_flag_get(RCU_FLAG_FWDGTRST)){
gd_eval_ledon(LED2);
rcu_reset_flag_clear();
while(1);
}else{
gd_eval_ledoff(LED2);
}
while (1);
}
/*!
\brief wait for oscillator stabilization flags is SET or oscillator startup is timeout
\param[in] osci: oscillator types, refer to rcu_osci_type_enum
only one parameter can be selected which is shown as below:
\arg RCU_HXTAL: high speed crystal oscillator(HXTAL)
\arg RCU_LXTAL: low speed crystal oscillator(LXTAL)
\arg RCU_IRC8M: internal 8M RC oscillators(IRC8M)
\arg RCU_IRC48M: internal 48M RC oscillators(IRC48M)
\arg RCU_IRC40K: internal 40K RC oscillator(IRC40K)
\arg RCU_PLL_CK: phase locked loop(PLL)
\arg RCU_PLL1_CK: phase locked loop 1
\arg RCU_PLL2_CK: phase locked loop 2
\param[out] none
\retval ErrStatus: SUCCESS or ERROR
*/
ErrStatus rcu_osci_stab_wait(rcu_osci_type_enum osci)
{
uint32_t stb_cnt = 0U;
ErrStatus reval = ERROR;
FlagStatus osci_stat = RESET;
switch (osci) {
/* wait HXTAL stable */
case RCU_HXTAL:
while ((RESET == osci_stat) && (HXTAL_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_HXTALSTB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_HXTALSTB)) {
reval = SUCCESS;
}
break;
/* wait LXTAL stable */
case RCU_LXTAL:
while ((RESET == osci_stat) && (LXTAL_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_LXTALSTB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_LXTALSTB)) {
reval = SUCCESS;
}
break;
/* wait IRC8M stable */
case RCU_IRC8M:
while ((RESET == osci_stat) && (IRC8M_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_IRC8MSTB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_IRC8MSTB)) {
reval = SUCCESS;
}
break;
/* wait IRC48M stable */
case RCU_IRC48M:
while ((RESET == osci_stat) && (OSC_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_IRC48MSTB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_IRC48MSTB)) {
reval = SUCCESS;
}
break;
/* wait IRC40K stable */
case RCU_IRC40K:
while ((RESET == osci_stat) && (OSC_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_IRC40KSTB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_IRC40KSTB)) {
reval = SUCCESS;
}
break;
/* wait PLL stable */
case RCU_PLL_CK:
while ((RESET == osci_stat) && (OSC_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_PLLSTB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_PLLSTB)) {
reval = SUCCESS;
}
break;
/* wait PLL1 stable */
case RCU_PLL1_CK:
while ((RESET == osci_stat) && (OSC_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_PLL1STB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_PLL1STB)) {
reval = SUCCESS;
}
break;
/* wait PLL2 stable */
case RCU_PLL2_CK:
while ((RESET == osci_stat) && (OSC_STARTUP_TIMEOUT != stb_cnt)) {
osci_stat = rcu_flag_get(RCU_FLAG_PLL2STB);
stb_cnt++;
}
/* check whether flag is set or not */
if (RESET != rcu_flag_get(RCU_FLAG_PLL2STB)) {
reval = SUCCESS;
}
break;
default:
break;
}
/* return value */
return reval;
}
