Posted on August 29, 2014 at 20:15Hi, I can manage to change clock from HSI>HSE and vice versa. But I am not able to bring LSI as my master clock. Can anyone help please?
I am using STM8S Discovery board and Cosmic C as my compiler.
My code is as follows:
/* MAIN.C file
*
* Copyright (c) 2002-2005 STMicroelectronics
*/
&sharpinclude ''stm8s.h''
u16 c=50000;
u8 i;
main()
{
ErrorStatus status;
CLK_DeInit();
CLK_HSICmd(ENABLE);
while (CLK_GetFlagStatus(CLK_FLAG_HSIRDY)==0);
CLK_LSICmd(ENABLE);
while (CLK_GetFlagStatus(CLK_FLAG_LSIRDY)==0);
CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1);
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV8);
CLK_ClockSwitchCmd(ENABLE);
CLK_CCOConfig(CLK_OUTPUT_MASTER);
CLK_CCOCmd(ENABLE);
GPIO_DeInit (GPIOD);
GPIO_Init (GPIOD,GPIO_PIN_0,GPIO_MODE_OUT_PP_LOW_FAST);
while (1){
// CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER2,ENABLE);
// TIM2_DeInit();
// TIM2_TimeBaseInit(TIM2_PRESCALER_2048, 300);
// TIM2_Cmd(ENABLE);
for(i=0;i<10;i++){
// if (TIM2_GetCounter()>150){
// GPIO_WriteHigh(GPIOD,GPIO_PIN_0);
// }
// else {
// GPIO_WriteLow(GPIOD,GPIO_PIN_0);
// }
while (c>1){
c--;
}
c=50000;
GPIO_WriteReverse(GPIOD,GPIO_PIN_0);
}
status=CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO,CLK_SOURCE_HSE,DISABLE,CLK_CURRENTCLOCKSTATE_ENABLE);
for(i=0;i<10;i++){
// if (TIM2_GetCounter()>150){
// GPIO_WriteHigh(GPIOD,GPIO_PIN_0);
// }
// else {
// GPIO_WriteLow(GPIOD,GPIO_PIN_0);
// }
while (c>1){
c--;
}
c=50000;
GPIO_WriteReverse(GPIOD,GPIO_PIN_0);
}
status=CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO,CLK_SOURCE_LSI,DISABLE,CLK_CURRENTCLOCKSTATE_ENABLE);
}
}
&sharpifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf(''Wrong parameters value: file %s on line %d\r\n'', file, line) */
/* Infinite loop */
while (1)
{
}
}
&sharpendif
#lsi-clock-source
