/*********************************************************************
 * 
 * 文件名：  User_Battery.c
 * 功能描述：设备电池电量管理
 * 作者：    陈俊超
 * 时间：2020-11-20
 * 
 ********************************************************************/

#include "nrf.h"
#include "nrf_drv_saadc.h"
#include "nrf_drv_ppi.h"
#include "nrf_drv_timer.h"
#include "app_timer.h"
#include "User_Battery.h"


/********************** 变量区 **************************************/
static nrf_saadc_value_t     m_buffer_Voltage[BatteryVoltageNumber];
static uint16_t Battery_ADC =0;//电池ADC值

#if (PCB_VERSION ==0)
static uint8_t ADC_Channel =5;
#elif (PCB_VERSION ==1)
static uint8_t ADC_Channel =3;
#elif (PCB_VERSION ==2)
static uint8_t ADC_Channel =0;
#elif (PCB_VERSION ==3)
static uint8_t ADC_Channel =3;
#endif 

/********************** 函数功能区 **************************************/

/**********************************************************
 * 函数名字：bubble_sort
 * 函数作用：冒泡排序
 * 函数参数：a：需要排列的数组
 *          n: 数组长度
 * 函数返回值：无
 ***********************************************************/
void bubble_sort(uint16_t a[], uint16_t n)
{
    int i,j;
    uint16_t temp; 
    for (j=0;j<n-1;j++){                              
        for (i=0;i<n-1-j;i++){
            if(a[i]>a[i+1]){
                temp=a[i];
                a[i]=a[i+1]; 
                a[i+1]=temp;
            }
        }
    }    
}

int filter(int data)
{
        #define filter_len 10
        static int buffer[filter_len] = {0};
        static int* buffer_p = (int*)buffer + (filter_len - 1);
        static int sum = (filter_len >> 1);
        sum -= *buffer_p;
        *buffer_p-- = data;
        sum += data;
        if (buffer_p < buffer)
        {
                buffer_p += filter_len;
        }
        return sum / filter_len;
}

short filter_mid_averange(short* p)
{
        int i;
        short buf[filter_mid_averange_number];
        for(i=0;i<filter_mid_averange_number;i++){
                buf[i] = p[i];
        }
        bubble_sort(buf,filter_mid_averange_number);
        return buf[filter_mid_averange_number>>1];
}

short filter_mid(short val)
{
        static short buf[filter_mid_averange_number];
        static int dex = 0;
        buf[dex] = val;
        if(++dex>=filter_mid_averange_number) dex = 0;
        return filter_mid_averange(buf);
}

/**********************************************************
 * 函数名字：saadc_callback
 * 函数作用：adc 事件回调 
 * 函数参数：p_event：事件类型
 * 函数返回值：无
 ***********************************************************/
static void saadc_callback(nrf_drv_saadc_evt_t const * p_event)
{
    if (p_event->type == NRF_DRV_SAADC_EVT_DONE){
        ret_code_t err_code = nrf_drv_saadc_buffer_convert(m_buffer_Voltage, BatteryVoltageNumber);
        APP_ERROR_CHECK(err_code);
    }
}

/**********************************************************
 * 函数名字：saadc_init
 * 函数作用：Adc模块功能初始化
 * 函数参数：无
 * 函数返回值：无
 ***********************************************************/
static void saadc_init(void)
{
    ret_code_t err_code;
    nrf_gpio_cfg_input(PIN_ADC_IN,NRF_GPIO_PIN_NOPULL);//设置ADC引脚为浮空

    #if (PCB_VERSION ==0)
    nrf_saadc_channel_config_t channel_config =
    NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(ADC_Channel+1);
    #elif (PCB_VERSION ==1)
    nrf_saadc_channel_config_t channel_config =
    NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(ADC_Channel+1);
    #else
    nrf_saadc_channel_config_t channel_config =
    NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(ADC_Channel+1);
    #endif 

    //单次阻塞式读取，不需要回调
    //err_code = nrf_drv_saadc_init(NULL, saadc_callback);
    err_code = nrf_drv_saadc_init(NULL, NULL);
    APP_ERROR_CHECK(err_code);

    //初始化通道0
    err_code = nrf_drv_saadc_channel_init(ADC_Channel, &channel_config);
    APP_ERROR_CHECK(err_code);

}


void Quick_GetBatteryPersent(void)
{
	  for(uint8_t temp =0;temp<filter_mid_averange_number;temp++)
	  {
			 GetBatteryVoltage_adc();
			 nrf_delay_ms(20);
		}
}
/**********************************************************
 * 函数名字：GetBatteryCurrentPersen
 * 函数作用：获取电池电量百分比
 * 函数参数：adcvalue ：读取到ADC值
 * 函数返回值：电量值
 ***********************************************************/
uint8_t GetBatteryCurrentPersent()
{
		 #if 0
        const unsigned short list[3][12]={
                {100,90,80,70,60,50,40,30,20,10,5,0},
                {4200,4060,3980,3870,3820,3790,3770,3740,3680,3450,3000},
                {678,651,640,629,621,610,606,603,600,586,548,470}
        };
        if(Battery_ADC>list[2][0])return 100;
        if(Battery_ADC<=list[2][11])return 0;
        for(int i=0;i<11;i++)
        {
                if((Battery_ADC > list[2][i+1]) && (Battery_ADC <= list[2][i]))
                {
                        return (list[0][i]-list[0][i+1])*(Battery_ADC-list[2][i+1])/(list[2][i]-list[2][i+1]) + list[0][i+1];
                }
        }
        #endif
        #if 1
        const unsigned short list[3][3]={
                {100,8,1},
                {4000,3300,2960},
                {683,565,507}
        };
        
        static short adcvalue_old=1000;
        short adcvalue_n=Battery_ADC;
        #if 1        
        if((Battery_ADC - adcvalue_old > 0)&&(Battery_ADC - adcvalue_old < 5))adcvalue_n=adcvalue_old;
        else adcvalue_old=Battery_ADC;
        #endif
        if(adcvalue_n>list[2][0])return 100;
        if(adcvalue_n<=list[2][2])return 0;
        for(int i=0;i<3;i++)
        {
                if((adcvalue_n > list[2][i+1]) && (adcvalue_n <= list[2][i]))
                {
                        return (list[0][i]-list[0][i+1])*(adcvalue_n-list[2][i+1])/(list[2][i]-list[2][i+1]) + list[0][i+1];
                }
        }
        #endif
        return 100;
}

/**********************************************************
 * 函数名字：StartBattery_Filter
 * 函数作用：获取电池的ADC值,并且使用冒泡排序过滤数据
 * 函数参数：无
 * 函数返回值：无
 ***********************************************************/
void StartBattery_Filter(void)
{
    nrf_saadc_value_t Batterysample;
    ret_code_t err_code = nrfx_saadc_sample_convert(ADC_Channel, &Batterysample);
    Battery_ADC = filter(filter_mid(Batterysample));

    #if DEBUG_EN
    //NRF_LOG_INFO("sample:%d\n",Battery_ADC*3600/1024);
    #endif
}

/**********************************************************
 * 函数名字：GetBatteryVoltage
 * 函数作用：获取电池的ADC值,并且使用冒泡排序过滤数据
 * 函数参数：无
 * 函数返回值：无
 ***********************************************************/
uint16_t GetBatteryVoltage_adc(void)
{
    return Battery_ADC;
}

/**********************************************************
 * 函数名字：User_SAADC_DisOrEnable
 * 函数作用：SAADC的打开和关闭
 * 函数参数：无
 * 函数返回值：无
 ***********************************************************/
void User_SAADC_DisOrEnable(bool value)
{
    static bool Saadc_Open_Flag =false;
    uint32_t err_code;
    if(value == Saadc_Open_Flag)return;
    if(value){
        saadc_init(); 
    }
    else{
        err_code = nrfx_saadc_channel_uninit(ADC_Channel);
        nrfx_saadc_uninit();
    }
    Saadc_Open_Flag = value;
}