【IAR工程】STM8S208RB基于ST标准库蜂鸣器(BEEP)驱动

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• 🌾寄存器版本《STM8S系列基于IAR开发：蜂鸣器（BEEP）驱动功能模块示例》
• 🌿相关篇《【IAR工程】STM8S208RB基于ST标准库下GPIO点灯示例》
• 🌿《【IAR工程】STM8S208RB基于ST标准库下EXTI外部中断》
• 🌿《【IAR工程】STM8S208RB基于ST标准库下自动唤醒(AWU)》
• 🔖基于ST STM8S/A标准外设库:STSW-STM8069,版本号：2.3.1
• 📌STSW-STM8069官方资源下载地址：https://www.st.com/zh/embedded-software/stsw-stm8069.html
• 🔧IAR编译器版本：IAR Assembler for STMicroelectronics STM8 3.11.1
• 📌STM8S207/208RBT6最小系统板：https://oshwhub.com/perseverance51/stm8s207rbt6-kai-fa-ban

📑蜂鸣器(BEEP)

当LS时钟工作在128kHz时可产生频率为1kHz，2 kHz或者是4 kHz的蜂鸣信号。

• 🌴DEEP输出引脚:PD4
  

🚩注意事项

• 🔰在使用该功能时，需要配置OPTION Byte（选项字节）
  

📑DEEP引脚配置函数

void MyBEEP_Init(void)
{
    //设置PD4为快速推挽输出
   	GPIO_Init(GPIOD , GPIO_PIN_4 , GPIO_MODE_OUT_PP_LOW_FAST);
}

📝主程序代码

• 🔖包含对内部低速时钟频率测量内容。

/**************************************************************************************
实验现象：打开串口调试助手，选择CH340对应串口号，波特率设置9600， 串口助手上会显示
			lsi_freq_hz= 136898 。

接线说明：	1，STM8S单片机-->LED
		   		PC7-->LED1
                                PC6-->LED2
--------------------------------------------------------------------
                        DEEP -> PD4
--------------------------------------------------------------------
OPTION Bytes选项：
                  AFR7 配置为“Alternate active”

注意事项：	1、点击“Download active application”按钮，程序下载完成后，即可运行程序。
		2、串口1使用的是PA4和PA5引脚，所以这两个IO口不要被占用
***************************************************************************************/



#include "stm8s.h"      /*  添加库函数头文件 */
#include "delay.h"
#include "led.h"
#include "beep.h"
#include "usart.h"
#include <stdio.h>//包含此头文件调用printf函数串口才能有输出


uint32_t LSIMeasurment( void );

/* 主函数 */
int main( void )
{
    u8 i = 0;
    uint32_t lsi_freq_hz;
    disableInterrupts();    //关闭系统中断
    //内部时钟为1分频 = 16Mhz
    CLK_SYSCLKConfig( CLK_PRESCALER_HSIDIV1 );
    LED_Init();
    USART1_Init( 9600 ); //初始化USART1 , 并设置波特率为9600
    MyBEEP_Init();
    /* BEEP calibration */
    lsi_freq_hz = LSIMeasurment() ;
    printf("lsi_freq_hz= %lu \r\n",lsi_freq_hz);
    BEEP_LSICalibrationConfig(lsi_freq_hz);

    enableInterrupts();     //使能系统中断

    while( 1 )
    {
        i++;
        if( i % 20 == 0 )
        {
            LED1_TOGGLE;
            LED2_TOGGLE;
        }
        if( i % 100 == 0 )
        {
                BEEP_Cmd(DISABLE);
                delay_ms(100);
                BEEP_Init(BEEP_FREQUENCY_4KHZ);//1KHz,2KHz,4KHz
                BEEP_Cmd(ENABLE);
        }
        delay_ms( 10 );
    }
}

/**
  * @brief  Measure the LSI frequency using timer IC1 and update the calibration registers.
  * @note   It is recommended to use a timer clock frequency of at least 10MHz in order
	*         to obtain a better in the LSI frequency measurement.
  * @param  None
  * @retval None
  */
uint32_t LSIMeasurment( void )
{

    uint32_t lsi_freq_hz = 0x0;
    uint32_t fmaster = 0x0;
    uint16_t ICValue1 = 0x0;
    uint16_t ICValue2 = 0x0;

    /* Get master frequency */
    fmaster = CLK_GetClockFreq();

    /* Enable the LSI measurement: LSI clock connected to timer Input Capture 1 */
    AWU->CSR |= AWU_CSR_MSR;

#if defined (STM8S903) || defined (STM8S103) || defined (STM8S003) || defined (STM8S001)
    /* Measure the LSI frequency with TIMER Input Capture 1 */

    /* Capture only every 8 events!!! */
    /* Enable capture of TI1 */
    TIM1_ICInit( TIM1_CHANNEL_1, TIM1_ICPOLARITY_RISING, TIM1_ICSELECTION_DIRECTTI, TIM1_ICPSC_DIV8, 0 );

    /* Enable TIM1 */
    TIM1_Cmd( ENABLE );

    /* wait a capture on cc1 */
    while( ( TIM1->SR1 & TIM1_FLAG_CC1 ) != TIM1_FLAG_CC1 );
    /* Get CCR1 value*/
    ICValue1 = TIM1_GetCapture1();
    TIM1_ClearFlag( TIM1_FLAG_CC1 );

    /* wait a capture on cc1 */
    while( ( TIM1->SR1 & TIM1_FLAG_CC1 ) != TIM1_FLAG_CC1 );
    /* Get CCR1 value*/
    ICValue2 = TIM1_GetCapture1();
    TIM1_ClearFlag( TIM1_FLAG_CC1 );

    /* Disable IC1 input capture */
    TIM1->CCER1 &= ( uint8_t )( ~TIM1_CCER1_CC1E );
    /* Disable timer2 */
    TIM1_Cmd( DISABLE );

#else
    /* Measure the LSI frequency with TIMER Input Capture 1 */

    /* Capture only every 8 events!!! */
    /* Enable capture of TI1 */
    TIM3_ICInit( TIM3_CHANNEL_1, TIM3_ICPOLARITY_RISING, TIM3_ICSELECTION_DIRECTTI, TIM3_ICPSC_DIV8, 0 );

    /* Enable TIM3 */
    TIM3_Cmd( ENABLE );

    /* wait a capture on cc1 */
    while ( ( TIM3->SR1 & TIM3_FLAG_CC1 ) != TIM3_FLAG_CC1 );
    /* Get CCR1 value*/
    ICValue1 = TIM3_GetCapture1();
    TIM3_ClearFlag( TIM3_FLAG_CC1 );

    /* wait a capture on cc1 */
    while ( ( TIM3->SR1 & TIM3_FLAG_CC1 ) != TIM3_FLAG_CC1 );
    /* Get CCR1 value*/
    ICValue2 = TIM3_GetCapture1();
    TIM3_ClearFlag( TIM3_FLAG_CC1 );

    /* Disable IC1 input capture */
    TIM3->CCER1 &= ( uint8_t )( ~TIM3_CCER1_CC1E );
    /* Disable timer3 */
    TIM3_Cmd( DISABLE );
#endif /* (STM8S903) || (STM8S103) || (STM8S003) || (STM8S001) */

    /* Compute LSI clock frequency */
    lsi_freq_hz = ( 8 * fmaster ) / ( ICValue2 - ICValue1 );

    /* Disable the LSI measurement: LSI clock disconnected from timer Input Capture 1 */
    AWU->CSR &= ( uint8_t )( ~AWU_CSR_MSR );

    return ( lsi_freq_hz );
}

//是一个宏定义；在固件库中，它的作用就是检测传递给函数的参数是否是有效的参数
void assert_failed( u8* file, u32 line )
{
    while ( 1 )
    {

    }
}

• 📜串口打印内部LSI时钟频率：
  

• 🌿BEEP_FREQUENCY_4KHZ测量
  

• 🌿BEEP_FREQUENCY_1KHZ测量
  

• 🌿BEEP_FREQUENCY_2KHZ测量
  

📚工程源码

• 🔖IAR对中文路径不友好，不要将工程解压在带有中文字符路径的文件夹内直接打开工程编译，这样会导致IAR内部检索文件路径将消耗大量CPU资源。

链接: https://pan.baidu.com/s/1XkLkZm2VY9LR2gwMDOYn5A
提取码: spws