STM8S003F3 internal clock initialization and timer delay usage-EEWORLD

The STM8S003F3 internal crystal oscillator initialization code is as follows:

CLK_DeInit();

CLK_LSICmd(ENABLE);

CLK_HSICmd(ENABLE);

while(SET != CLK_GetFlagStatus(CLK_FLAG_HSIRDY));

CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1);

CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //HSI = 16M (divide by 1)

Here I use timer4 as an example, the code is as follows:

//Delay 10us (2 division = 8M count 80 pulses)

TIM4_TimeBaseInit(TIM4_PRESCALER_2, 79);

TIM4_ClearFlag(TIM4_FLAG_UPDATE);

Then here, I use timer4 as the delay function, which can be used directly. The implementation code is as follows:

void TIMDelay_N10us(uint16_t Times)

{

TIM4_Cmd(ENABLE); //Start the timer

while(Times--)

{

while(RESET == TIM4_GetFlagStatus(TIM4_FLAG_UPDATE));

TIM4_ClearFlag(TIM4_FLAG_UPDATE);

}

TIM4_Cmd(DISABLE); //Disable the timer

}

void TIMDelay_Nms(uint16_t Times)

{

while(Times--)

{

TIMDelay_N10us(100);

}

void TIMDelay_Ns(uint16_t Times)

{

while(Times--)

{

TIMDelay_Nms(1000);

}

Keywords：STM8S003F3 Reference address：STM8S003F3 internal clock initialization and timer delay usage

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