STMicroelectronics STM8 - Page 42

Code Example
#include "STM8S.h"
void clock_setup(void);
void GPIO_setup(void);
void beeper_setup(void);
void main(void)
{
clock_setup();
GPIO_setup();
beeper_setup();
while(TRUE)
{
GPIO_WriteLow(GPIOD, GPIO_PIN_0);
BEEP_Cmd(ENABLE);
delay_ms(200);
GPIO_WriteHigh(GPIOD, GPIO_PIN_0);
BEEP_Cmd(DISABLE);
delay_ms(200);
};
}
void clock_setup(void)
{
CLK_DeInit();
CLK_HSECmd(DISABLE);
CLK_LSICmd(ENABLE);
while(CLK_GetFlagStatus(CLK_FLAG_LSIRDY) == FALSE);
CLK_HSICmd(ENABLE);
while(CLK_GetFlagStatus(CLK_FLAG_HSIRDY) == FALSE);
CLK_ClockSwitchCmd(ENABLE);
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1);
CLK_ClockSwitchConfig(CLK_SWITCHMODE_AUTO, CLK_SOURCE_HSI,
DISABLE, CLK_CURRENTCLOCKSTATE_ENABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_SPI, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_I2C, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_ADC, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_AWU, ENABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_UART1, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER1, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER2, DISABLE);
CLK_PeripheralClockConfig(CLK_PERIPHERAL_TIMER4, DISABLE);
}
void GPIO_setup(void)
{
GPIO_DeInit(GPIOD);
GPIO_Init(GPIOD, GPIO_PIN_0, GPIO_MODE_OUT_OD_LOW_FAST);
GPIO_Init(GPIOD, GPIO_PIN_4, GPIO_MODE_OUT_PP_HIGH_FAST);
}
void beeper_setup(void)