【匠芯创D133CBS】 ADC测试

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【匠芯创D133CBS】 ADC测试 [复制链接]

 

通过ADC按键来测试ADC输入。

 

一、硬件电路

 

ADC按键部分电路

PA2对应GPADC2功能

 

二、程序部分

 

adc.c

//adc.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <sys/time.h>
#include <rtthread.h>
#include "rtdevice.h"
#include <aic_core.h>
#include "hal_adcim.h"
#include "aic_log.h"
#include "hal_gpai.h"

/* Global macro and variables */
#define AIC_GPAI_NAME               "gpai"
/* The default voltages are set to D21x->3.0V, D31x、D12x->2.5V */
#define AIC_GPAI_DEFAULT_VOLTAGE    3.3
#define AIC_GPAI_VOLTAGE_ACCURACY   10000
#define AIC_GPAI_FIFO_MAX_DEPTH     32

static rt_adc_device_t gpai_dev;

static int g_sample_num = -1;
static u32 g_cal_param;

struct aic_gpai_ch_info ch_info = {0};
float def_voltage = AIC_GPAI_DEFAULT_VOLTAGE;

static int test_adc_hdl(void)
{
    int c;
    int ret;
    u32 ch = 0;
    int adc_val;
    int voltage = -1;
    int scale = AIC_GPAI_VOLTAGE_ACCURACY;

    ch_info.chan_id = 2;                        //采样通道2
    ch_info.mode = AIC_GPAI_MODE_PERIOD;        //单次采样
    def_voltage = 2.5;                          //参考电压2.5V
    g_sample_num = 1000;


    gpai_dev = (rt_adc_device_t)rt_device_find(AIC_GPAI_NAME);
    if (!gpai_dev) {
        rt_kprintf("Failed to open %s device\n", AIC_GPAI_NAME);
        return -RT_ERROR;
    }

    ret = rt_adc_control(gpai_dev, RT_ADC_CMD_GET_MODE, (void *)&ch_info);
    if (ret) {
        rt_kprintf("Failed to get GPAI mode\n");
        return -RT_ERROR;
    }

    g_cal_param = hal_adcim_auto_calibration();
    rt_adc_enable(gpai_dev, ch_info.chan_id);
    rt_adc_control(gpai_dev, RT_ADC_CMD_GET_CH_INFO, (void *)&ch_info);
    aicos_msleep(10);
    adc_val = ch_info.adc_values[0];
    if (adc_val) {
        voltage = hal_adcim_adc2voltage(adc_val, g_cal_param,
                                        AIC_GPAI_VOLTAGE_ACCURACY,
                                        def_voltage);
        rt_kprintf("GPAI voltage:%d.%04d v\n", voltage / scale,
                    voltage % scale);
    }
    return voltage;
}

static void adc_read_hdl(void *parmeter)
{
    
    while (1)
    {
        test_adc_hdl();
        rt_thread_mdelay(100);
    }
}

int  test_adc_sample(void)
{
    rt_thread_t adc_thread;

    adc_thread = rt_thread_create(
                                    "test_adc",
                                    adc_read_hdl,
                                    "adc2",
                                    2048,
                                    RT_THREAD_PRIORITY_MAX/2,
                                    25);
    if(adc_thread != RT_NULL)
    {
        rt_thread_startup(adc_thread); 
    }
    return RT_EOK;
}

MSH_CMD_EXPORT_ALIAS(test_adc_sample, test_adc_sample, gpai device sample);

 

三、配置ADC

 

3.1、打开ADC2

 

3.2、打开添加的测试例程

 

四、执行结果

 

下载程序后运行

4.1、按下UP按键，ADC电压值

 

4.2、按下DOWN按键，ADC电压值

4.3、按下LEFT按键，ADC电压值

4.4、按下RIGHT按键，ADC电压值

 

q1233

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