recipe.c

来自「单个表头的显示 运用了MAX7219驱动芯片」· C语言 代码 · 共 55 行

#include "DSP28_Device.h"

void InitRecipe(RECIPE* recipe)
{
	int i;
	for(i=0; i<3; i++)
	{
		recipe->para[i].ia_fun = GetValueFromRecipe;
		recipe->para[i].init_factor = InitFactor;
		recipe->para[i].index = 0;
	}
}


unsigned int  GetValueFromRecipe(void* _self, unsigned int time)
{
	PARAMETER *para = _self;
	if(time >= para->time[para->total_num-1])
	{
		return para->value[para->total_num-1];
	}

	if(time >= para->time[para->index+1])
	{
		para->index++;
	}

	return (((long)(time - para->time[para->index]) * para->factor[para->index])>>16)
				+ para->value[para->index];
}

void InitFactor(void* _self)
{
	unsigned int i;
	PARAMETER *para = _self;
	
	if(para->total_num < 2)
		return;

	for(i=0; i<para->total_num-1; i++)
	{
		if((para->time[i+1]-para->time[i])>0)
		{
			para->factor[i] = (((long)(para->value[i+1]-para->value[i]))<<16)
							/ (para->time[i+1]-para->time[i]);
		}
		else
		{
			para->factor[i] = 0;
		}
	}
}