#include "key.h"
#include "lcd.h"
#include "tim.h"
#include "ads1220.h"
#include "linear.h"

int key_flag = 0;
int ct_type = 0;
int mid_point = 0;

void key_scan()
{
	if(!KEY2)
	{
		__HAL_TIM_SetCounter(&htim1,10000);			//编码器初始值10000
		point_cnt = 0;
		key_flag = KEY2_DOWN;
		LCD_ShowString(10,0,"testing",RED,WHITE,32,0);
	}
	if(!KEY3)
	{
		key_flag = KEY3_DOWN;
		LCD_ShowString(10,0,"ready  ",RED,WHITE,32,0);
		
		//确认磁条型号
		if(abs(maxv_loca - minv_loca) < 500)
			ct_type = 1;//#25磁条
		else if(abs(maxv_loca - minv_loca) < 1100)
			ct_type = 2;//#50磁条
		else if(abs(maxv_loca - minv_loca) < 2100)
			ct_type = 3;//#110磁条
		else
			ct_type = 4;//#210磁条
		
		//确认有用数据范围
		int mid_point_v = 9999;
		for(int i = 0;i < point_data.cnt;i++)
		{
			if(abs(point_data.vol[i]) <= mid_point_v)
			{
				mid_point_v = abs(point_data.vol[i]);
				mid_point = i;
			}
		}
		int start_l = 0,end_l = 0;
		if(ct_type == 1)
		{
			start_l = point_data.loca[mid_point] - 354;
			end_l 	= point_data.loca[mid_point] + 354;
		}
		else if(ct_type == 2)
		{
			start_l = point_data.loca[mid_point] - 708;
			end_l 	= point_data.loca[mid_point] + 708;
		}
		else if(ct_type == 3)
		{
			start_l = point_data.loca[mid_point] - 1559;
			end_l 	= point_data.loca[mid_point] + 1559;
		}
		else if(ct_type == 4)
		{
			start_l = point_data.loca[mid_point] - 2976;
			end_l 	= point_data.loca[mid_point] + 2976;
		}
		
		//提取有用数据范围
		for(int i = 0;i < point_data.cnt;i++)
		{
			if(point_data.loca[i] >= start_l && point_data.loca[i] <= end_l)
			{
				point_v[point_cnt] = point_data.vol[i];
				point_l[point_cnt] = point_data.loca[i];
				point_cnt++;
			}
		}
		
		//得到线性度
		get_linearity();
	}
}