RTC not work

np1 · ‎2012-03-08

Posted on March 09, 2012 at 04:26

Hello all,

I connected crystal 32.768 khz to pin C5,C6 of stm8l151.

I want to use RTC-calendar but look like crystal not work.

/* Enable LSE */

CLK_LSEConfig(CLK_LSE_ON);

/* Wait for LSE clock to be ready */

while (CLK_GetFlagStatus(CLK_FLAG_LSERDY) == RESET);

/* wait for 1 second for the LSE Stabilisation */

LSE_StabTime();

/* Select LSE (32.768 KHz) as RTC clock source */

CLK_RTCClockConfig(CLK_RTCCLKSource_LSE, CLK_RTCCLKDiv_1);

CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE);

Please help me

Thanks all,

Nickname13136_O · ‎2012-03-13

Posted on March 13, 2012 at 13:21

Hello,

May be your crystal is not oscillating. Pls refer AN2867 at

You can also check whether the signals are coming on both the csystal legs at 180 degrees phase shift.

I hope this wil help.

Regards,