ADC单通道转换

/**

 * [url=home.php?mod=space&uid=247401]@brief[/url] ADC I/O初始化

 * 

 */

void ADC_PortInit(void)

{

    //打开GPIO时钟

    REGBITS_SET( CW_SYSCTRL->AHBEN, SYSCTRL_AHBEN_GPIOA_Msk );

    //打开ADC时钟

    REGBITS_SET( CW_SYSCTRL->APBEN2, SYSCTRL_APBEN2_ADC_Msk );



    //set PA01 as AIN1 INPUT

    PA01_ANALOG_ENABLE();

}



/**

 * @brief Main function of project

 * 

 * [url=home.php?mod=space&uid=266161]@return[/url] int 

 */

int main(void)

{

    ADC_InitTypeDef ADC_InitStructure;

    ADC_WdtTypeDef ADC_WdtStructure;

    ADC_SingleChTypeDef ADC_SingleChStructure;

    

        

        //LED初始化

        LED_Init();



    //配置ADC测试IO口

    ADC_PortInit();



    //ADC默认值初始化

    ADC_StructInit(&ADC_InitStructure);

    //ADC工作时钟配置

#ifdef SGL_MORE_MODE_EN

    ADC_InitStructure.ADC_ClkDiv = ADC_Clk_Div4;

#else

    ADC_InitStructure.ADC_ClkDiv = ADC_Clk_Div1;

#endif



    //ADC模拟看门狗通道初始化

    ADC_WdtInit(&ADC_WdtStructure);

    

    //配置单通道转换模式

    ADC_SingleChStructure.ADC_DiscardEn = ADC_DiscardNull;

    ADC_SingleChStructure.ADC_Chmux = ADC_ExInputCH1;        //选择ADC转换通道，AIN1:PA01

    ADC_SingleChStructure.ADC_InitStruct = ADC_InitStructure;

    ADC_SingleChStructure.ADC_WdtStruct = ADC_WdtStructure;



#ifdef SGL_ONE_MODE_EN

    ADC_SingleChOneModeCfg(&ADC_SingleChStructure);

    ADC_ITConfig(ADC_IT_EOC, ENABLE);



#elif defined (SGL_MORE_MODE_EN)

    cntSample = 0xFF; //转换次数为0xFF + 1次.

    ADC_SingleChMoreModeCfg(&ADC_SingleChStructure, cntSample);

        ADC_ITConfig(ADC_IT_EOC | ADC_IT_EOA, ENABLE);



#elif defined (SGL_CONTINUOUS_MODE_EN)

    ADC_SingleChContinuousModeCfg(&ADC_SingleChStructure);

    ADC_ITConfig(ADC_IT_EOC, ENABLE);

#else

    #error "Please select ADC's running mode first in main.h!"    

#endif



    //ADC_ITConfig(ADC_IT_EOC | ADC_IT_EOA, ENABLE);

    ADC_EnableIrq(ADC_INT_PRIORITY);

    ADC_ClearITPendingAll();



    //ADC使能

    ADC_Enable();

    ADC_SoftwareStartConvCmd(ENABLE);



    while(1)

    {

#ifdef SGL_MORE_MODE_EN

            while(!(gFlagIrq & ADC_ISR_EOA_Msk));

            gFlagIrq = 0u;

            ADC_GetAccResult(&valueAdcAcc);

                        

                if(gCntEoc != (cntSample + 1))

                {

                        PB08_SETHIGH();

                        PB09_SETHIGH();

                        while(1);        //error issue.

                }

                gCntEoc = 0u;



#else

        while(!(gFlagIrq & ADC_ISR_EOC_Msk));

        gFlagIrq = 0u;

        valueAdc = ADC_GetConversionValue();

#endif



        PB09_TOG();



#ifndef SGL_CONTINUOUS_MODE_EN

            ADC_SoftwareStartConvCmd(ENABLE);        //启动下一次ADC转换

#endif



    }



}