#include "app_screen_save.h"
#include "../msp/msp_eeprom.h"

//定义所使用内存的起始和结尾标志
#define HEAD0 0xa3
#define HEAD1 0xa4
#define TAIL0 0xa5
#define TAIL1 0xa6

SCREEN_SAVE screen_save_arr[SCREEN_SAVE_LEN] = {0};

//初始化存放重量数据的结构体数组screen_save_arr
void screen_save_init()
{
	int i = 0;
	for(i = 0;i < SCREEN_SAVE_LEN; i++)
	{
		screen_save_arr[i].head[0] = HEAD0;
		screen_save_arr[i].head[1] = HEAD1;
		screen_save_arr[i].available = 0;
		screen_save_arr[i].kgx10_out = 0;
		screen_save_arr[i].tail[0] = TAIL0;
		screen_save_arr[i].tail[1] = TAIL1;
	}
}
//存放重量数据到eeprom中
void screen_save_push(U16 weight)
{
	int i = 0;
	int free = 0;
	// 从eeprom中取出数组
	L0_Iap_Read_array(EEPROM_WEIGHT_ADDR, screen_save_arr,sizeof(screen_save_arr));
	if(screen_save_arr[0].head[0] != HEAD0 || screen_save_arr[0].head[1] != HEAD1
							|| screen_save_arr[0].tail[0] != TAIL0 || screen_save_arr[0].tail[1] != TAIL1)
	{
		screen_save_init();
	}
	// 遍历寻找空位
	for(i = 0;i < SCREEN_SAVE_LEN; i++)
	{
		if(screen_save_arr[i].available != 0)
		{
			free = i;
			break;
		}
	}
	// 当都有数据时
	if(i == SCREEN_SAVE_LEN)
	{
		for(i = 0; i < SCREEN_SAVE_LEN - 1; i++)
		{
			screen_save_arr[i] = screen_save_arr[i+1];
		}
		free = SCREEN_SAVE_LEN-1;
	}
	// 放到free位置
	screen_save_arr[free].available = 0;
	screen_save_arr[free].kgx10_out = weight;
	// 把数组放回eeprom中
	L0_Iap_Program_array(EEPROM_WEIGHT_ADDR, screen_save_arr,sizeof(screen_save_arr));
}