我测试了下GD32E230C8T6最小系统板

/*!

    \file  gd32e230c_eval.h

    \brief definitions for GD32E230C_EVAL's leds, keys and COM ports hardware resources

    

    \version 2019-02-19, V1.0.0, firmware for GD32E23x

*/



/*

    Copyright (c) 2019, GigaDevice Semiconductor Inc.



    All rights reserved.



    Redistribution and use in source and binary forms, with or without modification, 

are permitted provided that the following conditions are met:



    1. Redistributions of source code must retain the above copyright notice, this 

       list of conditions and the following disclaimer.

    2. Redistributions in binary form must reproduce the above copyright notice, 

       this list of conditions and the following disclaimer in the documentation 

       and/or other materials provided with the distribution.

    3. Neither the name of the copyright holder nor the names of its contributors 

       may be used to endorse or promote products derived from this software without 

       specific prior written permission.



    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 

IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 

INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 

NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 

PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 

OF SUCH DAMAGE.

*/



#ifndef GD32E230C_EVAL_H

#define GD32E230C_EVAL_H



#ifdef cplusplus

 extern "C" {

#endif



#include "gd32e23x.h"



/* exported types */

typedef enum 

{

    LED1 = 0,

    LED2 = 1,

    LED3 = 2,

    LED4 = 3

}led_typedef_enum;



typedef enum 

{

    KEY_WAKEUP = 0,

    //KEY_TAMPER = 1,

}key_typedef_enum;



typedef enum 

{

    KEY_MODE_GPIO = 0,

    KEY_MODE_EXTI = 1

}keymode_typedef_enum;





/* eval board low layer led */

#define LEDn                             4U



#define LED1_PIN                         GPIO_PIN_10

#define LED1_GPIO_PORT                   GPIOB

#define LED1_GPIO_CLK                    RCU_GPIOB



#define LED2_PIN                         GPIO_PIN_11

#define LED2_GPIO_PORT                   GPIOB

#define LED2_GPIO_CLK                    RCU_GPIOB



#define LED3_PIN                         GPIO_PIN_8

#define LED3_GPIO_PORT                   GPIOA

#define LED3_GPIO_CLK                    RCU_GPIOA



#define LED4_PIN                         GPIO_PIN_9

#define LED4_GPIO_PORT                   GPIOA

#define LED4_GPIO_CLK                    RCU_GPIOA



/* eval board low layer button */  

#define KEYn                             1U  //2U



/* wakeup push-button */

#define WAKEUP_KEY_PIN                   GPIO_PIN_0

#define WAKEUP_KEY_GPIO_PORT             GPIOA

#define WAKEUP_KEY_GPIO_CLK              RCU_GPIOA

#define WAKEUP_KEY_EXTI_LINE             EXTI_0

#define WAKEUP_KEY_EXTI_PORT_SOURCE      EXTI_SOURCE_GPIOA

#define WAKEUP_KEY_EXTI_PIN_SOURCE       EXTI_SOURCE_PIN0

#define WAKEUP_KEY_EXTI_IRQn             EXTI0_1_IRQn



/* tamper push-button */

//#define TAMPER_KEY_PIN                   GPIO_PIN_13

//#define TAMPER_KEY_GPIO_PORT             GPIOC

//#define TAMPER_KEY_GPIO_CLK              RCU_GPIOC

//#define TAMPER_KEY_EXTI_LINE             EXTI_13

//#define TAMPER_KEY_EXTI_PORT_SOURCE      EXTI_SOURCE_GPIOC

//#define TAMPER_KEY_EXTI_PIN_SOURCE       EXTI_SOURCE_PIN13

//#define TAMPER_KEY_EXTI_IRQn             EXTI4_15_IRQn



/* eval board low layer COM */

#define COMn                             1U



/* definition for COM, connected to USART0 */

#define EVAL_COM                         USART0

#define EVAL_COM_CLK                     RCU_USART0



#define EVAL_COM_TX_PIN                  GPIO_PIN_9

#define EVAL_COM_RX_PIN                  GPIO_PIN_10



#define EVAL_COM_GPIO_PORT               GPIOA

#define EVAL_COM_GPIO_CLK                RCU_GPIOA

#define EVAL_COM_AF                      GPIO_AF_1



/* function declarations */

/* configure led GPIO */

void gd_eval_led_init(led_typedef_enum lednum);

/* turn on selected led */

void gd_eval_led_on(led_typedef_enum lednum);

/* turn off selected led */

void gd_eval_led_off(led_typedef_enum lednum);

/* toggle the selected led */

void gd_eval_led_toggle(led_typedef_enum lednum);

/* configure key */

void gd_eval_key_init(key_typedef_enum keynum, keymode_typedef_enum keymode);

/* return the selected key state */

uint8_t gd_eval_key_state_get(key_typedef_enum keynum);

/* configure COM port */

void gd_eval_com_init(uint32_t com);



#ifdef cplusplus

}

#endif



#endif /* GD32E230C_EVAL_H */

/*!

    \file  main.c

    \brief running LED

    

    \version 2019-02-19, V1.0.0, firmware for GD32E23x

*/



/*

    Copyright (c) 2019, GigaDevice Semiconductor Inc.



    All rights reserved.



    Redistribution and use in source and binary forms, with or without modification, 

are permitted provided that the following conditions are met:



    1. Redistributions of source code must retain the above copyright notice, this 

       list of conditions and the following disclaimer.

    2. Redistributions in binary form must reproduce the above copyright notice, 

       this list of conditions and the following disclaimer in the documentation 

       and/or other materials provided with the distribution.

    3. Neither the name of the copyright holder nor the names of its contributors 

       may be used to endorse or promote products derived from this software without 

       specific prior written permission.



    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 

IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 

INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 

NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 

PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 

OF SUCH DAMAGE.

*/



#include "gd32e23x.h"

#include "gd32e230c_eval.h"

#include "systick.h"

#include <stdio.h>



/*!

    \brief      main function

    \param[in]  none

    \param[out] none

    \retval     none

*/

int main(void)

{

    //时钟初始化

    systick_config();

    //初始化LED

    gd_eval_led_init(LED1);

    gd_eval_led_init(LED2);

    gd_eval_led_init(LED3);

    gd_eval_led_init(LED4);

    

    gd_eval_led_off(LED1);

    gd_eval_led_off(LED2);

    gd_eval_led_off(LED3);

    gd_eval_led_off(LED4);

    //初始化按键

    gd_eval_key_init(KEY_WAKEUP,KEY_MODE_GPIO);

    //初始化串口0

    gd_eval_com_init(EVAL_COM);

    

    while(gd_eval_key_state_get(KEY_WAKEUP)==SET)

    {

        printf("please press wakeup_key to  continue!\r\n");

        delay_1ms(200);

    }



    while(1){

        /* turn on LED1, turn off LED4 */

        gd_eval_led_on(LED1);

        gd_eval_led_off(LED4);

        delay_1ms(1000);

        /* turn on LED2, turn off LED1 */

        gd_eval_led_on(LED2);

        gd_eval_led_off(LED1);

        delay_1ms(1000);

        /* turn on LED3, turn off LED2 */

        gd_eval_led_on(LED3);

        gd_eval_led_off(LED2);

        delay_1ms(1000);

        /* turn on LED4, turn off LED3 */

        gd_eval_led_on(LED4);

        gd_eval_led_off(LED3);

        delay_1ms(1000);

    }

}





/* retarget the C library printf function to the USART */

int fputc(int ch, FILE *f)

{

    usart_data_transmit(USART0, (uint8_t) ch);

    while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));

    return ch;

}

#ifndef __USART0_H

#define __USART0_H



#include "stdio.h"        

#include "gd32e23x.h"

#include "gd32e230c_eval.h"

#include "systick.h"



#define USART0_REC_LEN                          200          //定义最大接收字节数 200

#define EN_USART0_RX                             1                //使能（1）/禁止（0）串口0接收中断

#define EN_USART0_TX                             0                //使能（1）/禁止（0）串口0发送中断

                  

extern uint8_t  USART0_RX_BUF[USART0_REC_LEN]; //接收缓冲,最大USART_REC_LEN个字节.末字节为换行符 

extern uint16_t USART0_RX_STA;                         //接收状态标记        

void uart0_init(uint32_t bound);

#endif

#include "usart0.h"









uint8_t USART0_RX_BUF[USART0_REC_LEN];     //接收缓冲,最大USART_REC_LEN个字节.

//接收状态

//bit15，        接收完成标志

//bit14，        接收到0x0d

//bit13~0，        接收到的有效字节数目

uint16_t USART0_RX_STA=0;       //接收状态标记          

  

void uart0_init(uint32_t bound)

{

    //初始化

    gd_eval_com_init(EVAL_COM);

    //设置波特率

    usart_baudrate_set(EVAL_COM, bound);

    #if EN_USART0_TX

    //使能发送中断

    usart_interrupt_enable(USART0, USART_INT_TBE);

    #endif

    #if EN_USART0_RX   //如果使能了接收

    //使能接收中断

    usart_interrupt_enable(USART0, USART_INT_RBNE);

    /* USART interrupt configuration */

    nvic_irq_enable(USART0_IRQn, 0);

    #endif

}



void USART0_IRQHandler(void)                        //串口1中断服务程序

{

    #if EN_USART0_RX

        uint8_t Res;



        if(usart_interrupt_flag_get(EVAL_COM, USART_INT_FLAG_RBNE) != RESET)  //接收中断(接收到的数据必须是0x0d 0x0a结尾)

        {

                Res =usart_data_receive(EVAL_COM);        //读取接收到的数据

                

                if((USART0_RX_STA&0x8000)==0)//接收未完成

                {

                        if(USART0_RX_STA&0x4000)//接收到了0x0d

            {

            if(Res!=0x0a)USART0_RX_STA=0;//接收错误,重新开始

            else USART0_RX_STA|=0x8000;        //接收完成了 

            }

                        else //还没收到0X0D

            {        

                if(Res==0x0d)USART0_RX_STA|=0x4000;

                else

                {

                    USART0_RX_BUF[USART0_RX_STA&0X3FFF]=Res ;

                    USART0_RX_STA++;

                    if(USART0_RX_STA>(USART0_REC_LEN-1))USART0_RX_STA=0;//接收数据错误,重新开始接收          

                }                 

            }

                }                    

     } 

    #endif

    #if EN_USART0_TX

    if(usart_interrupt_flag_get(EVAL_COM, USART_INT_FLAG_TBE)!= RESET)

    {

        /* transmit data */

//        usart_data_transmit(EVAL_COM, transmitter_buffer[txcount++]);

//        if(txcount == transfersize){

//            usart_interrupt_disable(EVAL_COM, USART_INT_TBE);

//        }

    }

    #endif

} 





/* retarget the C library printf function to the USART */

int fputc(int ch, FILE *f)

{

    usart_data_transmit(USART0, (uint8_t) ch);

    while(RESET == usart_flag_get(USART0, USART_FLAG_TBE));

    return ch;

}

/*!

    \file  main.c

    \brief running LED

    

    \version 2019-02-19, V1.0.0, firmware for GD32E23x

*/



/*

    Copyright (c) 2019, GigaDevice Semiconductor Inc.



    All rights reserved.



    Redistribution and use in source and binary forms, with or without modification, 

are permitted provided that the following conditions are met:



    1. Redistributions of source code must retain the above copyright notice, this 

       list of conditions and the following disclaimer.

    2. Redistributions in binary form must reproduce the above copyright notice, 

       this list of conditions and the following disclaimer in the documentation 

       and/or other materials provided with the distribution.

    3. Neither the name of the copyright holder nor the names of its contributors 

       may be used to endorse or promote products derived from this software without 

       specific prior written permission.



    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 

IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 

INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 

NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 

PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 

WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 

OF SUCH DAMAGE.

*/



#include "gd32e23x.h"

#include "gd32e230c_eval.h"

#include "systick.h"

#include <stdio.h>

#include "usart0.h"



/*!

    \brief      main function

    \param[in]  none

    \param[out] none

    \retval     none

*/

int main(void)

{

    uint16_t t;  

        uint16_t len;        

        uint16_t times=0;

    //时钟初始化

    systick_config();

    //初始化LED

    gd_eval_led_init(LED1);

    gd_eval_led_init(LED2);

    gd_eval_led_init(LED3);

    gd_eval_led_init(LED4);

    

    gd_eval_led_off(LED1);

    gd_eval_led_off(LED2);

    gd_eval_led_off(LED3);

    gd_eval_led_off(LED4);

    //初始化按键

    gd_eval_key_init(KEY_WAKEUP,KEY_MODE_GPIO);

    //初始化串口0

    uart0_init(115200);

    

//    while(gd_eval_key_state_get(KEY_WAKEUP)==SET)

//    {

//        printf("please press wakeup_key to  continue!\r\n");

//        delay_1ms(200);

//    }



    while(1){

//        /* turn on LED1, turn off LED4 */

//        gd_eval_led_on(LED1);

//        gd_eval_led_off(LED4);

//        delay_1ms(1000);

//        /* turn on LED2, turn off LED1 */

//        gd_eval_led_on(LED2);

//        gd_eval_led_off(LED1);

//        delay_1ms(1000);

//        /* turn on LED3, turn off LED2 */

//        gd_eval_led_on(LED3);

//        gd_eval_led_off(LED2);

//        delay_1ms(1000);

//        /* turn on LED4, turn off LED3 */

//        gd_eval_led_on(LED4);

//        gd_eval_led_off(LED3);

//        delay_1ms(1000);

        

        

        if(USART0_RX_STA&0x8000)

                {                                           

                        len=USART0_RX_STA&0x3fff;//得到此次接收到的数据长度

                        printf("\r\n您发送的消息为:\r\n\r\n");

                        for(t=0;t<len;t++)

                        {

                                usart_data_transmit(USART0,(uint8_t) USART0_RX_BUF[t]);//向串口1发送数据

                                while(usart_flag_get(USART0, USART_FLAG_TBE)!=SET);//等待发送结束

                        }

                        printf("\r\n\r\n");//插入换行

                        USART0_RX_STA=0;

                }else

                {

                        times++;

                        if(times%5000==0)

                        {

                                printf("\r\nGD32E230C8T6 串口实验\r\n");

                                printf("----20210730----\r\n\r\n");

                        }

                        if(times%200==0)printf("请输入数据,以回车键结束\n");  

                        if(times%30==0)gd_eval_led_toggle(LED1);//闪烁LED,提示系统正在运行.

                        delay_1ms(10);   

                }

    }

}

void adc_init(void)

{

    //////////////时钟初始化/////////////////

    /* enable the GPIO clock */

    //使能对应GPIO PIN时钟

    rcu_periph_clock_enable(RCU_GPIOA);

    /* ADCCLK = PCLK2/6 */

    //ADC时钟分频

    rcu_adc_clock_config(RCU_ADCCK_APB2_DIV6);

    /* enable DMA clock */

    //使能DMA时钟

    rcu_periph_clock_enable(RCU_DMA);

    /* enable ADC clock */

    //使能ADC时钟

    rcu_periph_clock_enable(RCU_ADC);

    /* enable TIMER0 clock */

    //使能TIMER0时钟

    rcu_periph_clock_enable(RCU_TIMER0);



    /////////////配置输入引脚//////////////////////

    /* configure PA2(ADC channel2) as analog input */

    //配置PA2为模拟输入

    gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_2);



    //////////////配置DMA/////////////////////////

    dma_parameter_struct dma_init_struct;



    /* initialize DMA channel0 */

    dma_deinit(DMA_CH0);

    dma_init_struct.direction    = DMA_PERIPHERAL_TO_MEMORY;

    dma_init_struct.memory_addr  = (uint32_t)ad_value;

    dma_init_struct.memory_inc   = DMA_MEMORY_INCREASE_ENABLE;

    dma_init_struct.memory_width = DMA_MEMORY_WIDTH_16BIT;

    dma_init_struct.number       = sample_num;

    dma_init_struct.periph_addr  = (uint32_t)&(ADC_RDATA);

    dma_init_struct.periph_inc   = DMA_PERIPH_INCREASE_DISABLE;

    dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;

    dma_init_struct.priority     = DMA_PRIORITY_ULTRA_HIGH;

    dma_init(DMA_CH0, &dma_init_struct);

    

    /* configure DMA mode */

    dma_circulation_enable(DMA_CH0);

    dma_memory_to_memory_disable(DMA_CH0);

    

    /* enable DMA channel0 */

    dma_channel_enable(DMA_CH0);

    

    //////////////配置采样时钟TIMER0/////////////

    timer_oc_parameter_struct timer_ocintpara;

    timer_parameter_struct timer_initpara;



    timer_deinit(TIMER0);



    /* TIMER0 configuration */

    timer_initpara.prescaler         = 5;

    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;

    timer_initpara.counterdirection  = TIMER_COUNTER_UP;

    timer_initpara.period            = 399;

    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;

    timer_initpara.repetitioncounter = 0;

    timer_init(TIMER0, &timer_initpara);



    /* CH0 configuration in PWM mode1 */

    timer_ocintpara.ocpolarity  = TIMER_OC_POLARITY_LOW;

    timer_ocintpara.outputstate = TIMER_CCX_ENABLE;

    timer_channel_output_config(TIMER0, TIMER_CH_0, &timer_ocintpara);



    timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_0, 100);

    timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM1);

    timer_channel_output_shadow_config(TIMER0, TIMER_CH_0, TIMER_OC_SHADOW_DISABLE);



    /* auto-reload preload enable */

    timer_auto_reload_shadow_enable(TIMER0);

    timer_primary_output_config(TIMER0, ENABLE);

    

    /////////////////ADC配置///////////////////////////

     /* ADC channel length config */

    adc_channel_length_config(ADC_REGULAR_CHANNEL, 1);



    /* ADC regular channel config */

    adc_regular_channel_config(0, ADC_CHANNEL_2, ADC_SAMPLETIME_55POINT5);



    /* ADC external trigger enable */

    adc_external_trigger_config(ADC_REGULAR_CHANNEL, ENABLE);

    /* ADC external trigger source config */

    adc_external_trigger_source_config(ADC_REGULAR_CHANNEL, ADC_EXTTRIG_REGULAR_T0_CH0);

    /* ADC data alignment config */

    adc_data_alignment_config(ADC_DATAALIGN_RIGHT);

    /* enable ADC interface */

    adc_enable();

    /* ADC calibration and reset calibration */

    adc_calibration_enable();

    /* ADC DMA function enable */

    adc_dma_mode_enable();

}

#include "usart0.h"

void ADC_getvalue_Tast(void)

{

    uint16_t i=0;

    uint32_t ADC_VALUE=0;

    float voltage_value=0.0;

    /* TIMER0 counter enable */

    //开启采样

    timer_enable(TIMER0);

    /* test on channel0 transfer complete flag */

    //等待设定的220个采样点结束

    while( !dma_flag_get(DMA_CH0, DMA_FLAG_FTF));

    /* clear channel0 transfer complete flag */

    dma_flag_clear(DMA_CH0, DMA_FLAG_FTF);



    /* TIMER0 counter disable */

    //关闭采样

    timer_disable(TIMER0);

    //串输出采样数值

    

    for(i=0;i<sample_num;i++)

    {

        ADC_VALUE=ad_value[i]*3300/4096+ADC_VALUE;//转换成mv

    }

    

    voltage_value=ADC_VALUE/sample_num*1.00;

    printf("the ADC_CH2 VOLTAGE IS : %.2f mv\r\n",voltage_value);



}

#ifndef __ADC_H_

#define __ADC_H_



#include "stdio.h"        

#include "gd32e23x.h"

#include "gd32e230c_eval.h"

#include "systick.h"



#define sample_num  220  //定义采样点



extern uint16_t ad_value[sample_num];





void adc_init(void);

void ADC_getvalue_Tast(void);







#endif

#include "adc.h"



uint16_t ad_value[sample_num];

//PA2  ADC_CH2

void adc_init(void)

{

    //////////////时钟初始化/////////////////

    /* enable the GPIO clock */

    //使能对应GPIO PIN时钟

    rcu_periph_clock_enable(RCU_GPIOA);

    /* ADCCLK = PCLK2/6 */

    //ADC时钟分频

    rcu_adc_clock_config(RCU_ADCCK_APB2_DIV6);

    /* enable DMA clock */

    //使能DMA时钟

    rcu_periph_clock_enable(RCU_DMA);

    /* enable ADC clock */

    //使能ADC时钟

    rcu_periph_clock_enable(RCU_ADC);

    /* enable TIMER0 clock */

    //使能TIMER0时钟

    rcu_periph_clock_enable(RCU_TIMER0);



    /////////////配置输入引脚//////////////////////

    /* configure PA2(ADC channel2) as analog input */

    //配置PA2为模拟输入

    gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_2);



    //////////////配置DMA/////////////////////////

    dma_parameter_struct dma_init_struct;



    /* initialize DMA channel0 */

    dma_deinit(DMA_CH0);

    dma_init_struct.direction    = DMA_PERIPHERAL_TO_MEMORY;

    dma_init_struct.memory_addr  = (uint32_t)ad_value;

    dma_init_struct.memory_inc   = DMA_MEMORY_INCREASE_ENABLE;

    dma_init_struct.memory_width = DMA_MEMORY_WIDTH_16BIT;

    dma_init_struct.number       = sample_num;

    dma_init_struct.periph_addr  = (uint32_t)&(ADC_RDATA);

    dma_init_struct.periph_inc   = DMA_PERIPH_INCREASE_DISABLE;

    dma_init_struct.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;

    dma_init_struct.priority     = DMA_PRIORITY_ULTRA_HIGH;

    dma_init(DMA_CH0, &dma_init_struct);

    

    /* configure DMA mode */

    dma_circulation_enable(DMA_CH0);

    dma_memory_to_memory_disable(DMA_CH0);

    

    /* enable DMA channel0 */

    dma_channel_enable(DMA_CH0);

    

    //////////////配置采样时钟TIMER0/////////////

    timer_oc_parameter_struct timer_ocintpara;

    timer_parameter_struct timer_initpara;



    timer_deinit(TIMER0);



    /* TIMER0 configuration */

    timer_initpara.prescaler         = 5;

    timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;

    timer_initpara.counterdirection  = TIMER_COUNTER_UP;

    timer_initpara.period            = 399;

    timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;

    timer_initpara.repetitioncounter = 0;

    timer_init(TIMER0, &timer_initpara);



    /* CH0 configuration in PWM mode1 */

    timer_ocintpara.ocpolarity  = TIMER_OC_POLARITY_LOW;

    timer_ocintpara.outputstate = TIMER_CCX_ENABLE;

    timer_channel_output_config(TIMER0, TIMER_CH_0, &timer_ocintpara);



    timer_channel_output_pulse_value_config(TIMER0, TIMER_CH_0, 100);

    timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM1);

    timer_channel_output_shadow_config(TIMER0, TIMER_CH_0, TIMER_OC_SHADOW_DISABLE);



    /* auto-reload preload enable */

    timer_auto_reload_shadow_enable(TIMER0);

    timer_primary_output_config(TIMER0, ENABLE);

    

    /////////////////ADC配置///////////////////////////

     /* ADC channel length config */

    adc_channel_length_config(ADC_REGULAR_CHANNEL, 1);



    /* ADC regular channel config */

    adc_regular_channel_config(0, ADC_CHANNEL_2, ADC_SAMPLETIME_55POINT5);



    /* ADC external trigger enable */

    adc_external_trigger_config(ADC_REGULAR_CHANNEL, ENABLE);

    /* ADC external trigger source config */

    adc_external_trigger_source_config(ADC_REGULAR_CHANNEL, ADC_EXTTRIG_REGULAR_T0_CH0);

    /* ADC data alignment config */

    adc_data_alignment_config(ADC_DATAALIGN_RIGHT);

    /* enable ADC interface */

    adc_enable();

    /* ADC calibration and reset calibration */

    adc_calibration_enable();

    /* ADC DMA function enable */

    adc_dma_mode_enable();

}



#include "usart0.h"

void ADC_getvalue_Tast(void)

{

    uint16_t i=0;

    uint32_t ADC_VALUE=0;

    float voltage_value=0.0;

    /* TIMER0 counter enable */

    //开启采样

    timer_enable(TIMER0);

    /* test on channel0 transfer complete flag */

    //等待设定的220个采样点结束

    while( !dma_flag_get(DMA_CH0, DMA_FLAG_FTF));

    /* clear channel0 transfer complete flag */

    dma_flag_clear(DMA_CH0, DMA_FLAG_FTF);



    /* TIMER0 counter disable */

    //关闭采样

    timer_disable(TIMER0);

    //串输出采样数值

    

    for(i=0;i<sample_num;i++)

    {

        ADC_VALUE=ad_value[i]*3300/4096+ADC_VALUE;//转换成mv

    }

    

    voltage_value=ADC_VALUE/sample_num*1.00;

    printf("the ADC_CH2 VOLTAGE IS : %.2f mv\r\n",voltage_value);



}

//初始化ADC

adc_init();

.......

while(1)

{

        ADC_getvalue_Tast();

        delay_1ms(1000);   

}