How to Switch the STM8L152 the sys clock source for HSI to LSI

honami520 · ‎2011-02-11

Posted on February 12, 2011 at 04:39

I can change the sys clock source from HSI to LSI success in the debug mode with ST_LINK in the IDE Iar for stm8.

But it can't success when abort the debug mode. i need a help,someone can help me.

This is my code:

CLK_CKDIVR_CKM = 0; //????????

CLK_ICKCR_LSION = 1; //??LSI

while(CLK_ICKCR_LSIRDY); //??LSI??

CLK_SWCR_SWEN = 1; //??????

CLK_SWR = 0x02; //??LSI????

while(CLK_SCSR != 0x02); //??LSI????????

// CLK_SWCR_SWEN = 0; //??????

// CLK_ICKCR_HSION = 0; //??HSI??

#lsi-stm8l

vincent.philippe · ‎2011-04-06

Posted on April 06, 2011 at 11:26

Hi,

In fact, for switch clock source HSI --> LSI, I suggest to you to use driver commands something like that:

CLK_LSICmd(ENABLE);

CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_1);

CLK_SYSCLKSourceConfig(CLK_SYSCLKSource_LSI);

CLK_SYSCLKSourceSwitchCmd(ENABLE);

while (((CLK->SWCR)& 0x01)==0x01);

I try it I don't see any problem in LSI when I abort the debug mode.

Best regards

Philippe