GD32E23G6主时钟初期化失败问题

只看该作者 · 2022-2-6 13:48

环境是KEIL5，使用的ST link
不管是DEMO程序还是自写程序，主时钟初期化一直失败，更换主频设定也不行。停在下记画圈的地方。
想问问可能是哪里的问题

只看该作者 · 2022-2-6 13:51

不好意思图传不上来，停在下记红色位置
static void system_clock_8m_hxtal(void)
{
uint32_t timeout = 0U;
uint32_t stab_flag = 0U;

/* enable HXTAL */
RCU_CTL0 |= RCU_CTL0_HXTALEN;

/* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */
do{
      timeout++;
      stab_flag = (RCU_CTL0 & RCU_CTL0_HXTALSTB);
}
while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout));
    /* if fail */
if(0U == (RCU_CTL0 & RCU_CTL0_HXTALSTB)){
      while(1){
      }
}

/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV1;
/* APB1 = AHB */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV1;

/* select HXTAL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_HXTAL;

/* wait until HXTAL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_HXTAL)){
}
}