PLL时钟最大配制到24M，高于24M在PA01脚看不到波形了，请问下哪里写的不对呢？

只看该作者 · 2021-5-11 13:24

void App_SystemClkInit_PLL32M_byXTH(void)
{
stc_sysctrl_pll_cfg_t stcPLLCfg;

///< 切换时钟前（根据外部高速晶振）设置XTH频率范围,配置晶振参数，使能目标时钟
Sysctrl_SetXTHFreq(SysctrlXthFreq4_8MHz);
Sysctrl_XTHDriverCfg(SysctrlXtalDriver1);
Sysctrl_SetXTHStableTime(SysctrlXthStableCycle16384);
Sysctrl_ClkSourceEnable(SysctrlClkXTH, TRUE);
delay1ms(10);

stcPLLCfg.enInFreq = SysctrlPllInFreq6_12MHz; //XTH 8MHz
stcPLLCfg.enOutFreq = SysctrlPllOutFreq24_36MHz;  //PLL 输出
stcPLLCfg.enPllClkSrc = SysctrlPllXthXtal;       //输入时钟源选择XTH
stcPLLCfg.enPllMul = SysctrlPllMul4;          //8MHz x 4 = 32MHz
Sysctrl_SetPLLFreq(&stcPLLCfg);

///< 当使用的时钟源HCLK大于24M：设置FLASH 读等待周期为1 cycle(默认值也为1 cycle)
Flash_WaitCycle(FlashWaitCycle1);

///< 使能PLL
Sysctrl_ClkSourceEnable(SysctrlClkPLL, TRUE);
///< 时钟切换到PLL
Sysctrl_SysClkSwitch(SysctrlClkPLL);
}