STM8S clock switching self-study notes 2-EEWORLD

Collect

Last time it was automatic switching, this time write manual switching

Main registers

CLK_SWCR

CLK_SWR

CLK_CMSR

Manual Switch

1. CLK_SWR writes u8 value, SWBSY hardware is set in CLK_SWCR

2. The user software waits until the target clock is stable. The meaning of CLK_SWCR SWIF depends on the state of the SWEN bit. If SWIEN is 1, an interrupt is generated.

3. At the time point selected by the user software, set SWEN in CLK_SWCR to execute the switch

#include "stm8s.h"
#define uint unsigned int
void Delay(uint x)
{
  while(x--);
}
void main()
{

// u8 i;
  GPIO_Init( GPIOG,GPIO_PIN_0,GPIO_MODE_OUT_PP_HIGH_SLOW);
CLK_ClockSwitchConfig(CLK_SWITCHMODE_MANUAL,CLK_SOURCE_HSE,ENABLE,CLK_CURRENTCLOCKSTATE_ENABLE);
rim();
while(1)
{
    GPIO_WriteReverse(GPIOG,GPIO_PIN_0);
    Delay(50000);

}

}
#ifdef USE_FULL_ASSERT
void assert_failed(u8* file, u32 line)
{
   while (1)
   {
   }
}
#endif

INTERRUPT_HANDLER(CLK_IRQHandler, 2)
{
  CLK_ClearITPendingBit(CLK_IT_SWIF);// In order to detect unexpected events during development,

  CLK_ClockSwitchCmd(ENABLE);// it is recommended to set a breakpoint on the following instruction.

}

Keywords：STM8S Reference address：STM8S clock switching self-study notes 2

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