subcalc.c

日立单片机H8S2144例程.包括AD,DA等程序(用于光源)但对于H8S2144使用者来说有很大的帮助.

#include "H8S2144.h"						
#include "Global.h"							
#include "Data.h"
#include "Extern.h"

#define  IF_DA_SET		1
#define  IF_DA_SET_MAX	0x8fff

short get_da_if(short ch, short pixel, short *ifdat )
{
	long data, aa, bb, ifda ;
	if (ch < 1 || ch > MAX_CH) {
		return ERR_DATA;
	}
	if (pixel < 1 || pixel > MAX_PIXEL) {
		return ERR_DATA;
	}
	data = g_SetIf[ch-1][pixel-1];

	switch(g_Range[ch-1])
	{
	case 1:
		aa = g_CalIfaR1[ch-1][pixel-1];
		bb = g_CalIfbR1[ch-1][pixel-1];
		break;
	case 2:
		aa = g_CalIfaR2[ch-1][pixel-1];
		bb = g_CalIfbR2[ch-1][pixel-1];
		break;
	case 3:
		aa = g_CalIfaR3[ch-1][pixel-1];
		bb = g_CalIfbR3[ch-1][pixel-1];
		break;
	default:
		aa = g_CalIfaR1[ch-1][pixel-1];
		bb = g_CalIfbR1[ch-1][pixel-1];
		break;
	}

	ifda = (aa * data)/1000 + bb;
	ifda = ifda / IF_DA_SET ;
	if (ifda > IF_DA_SET_MAX) {
		ifda = IF_DA_SET_MAX;
	}

	*ifdat = (short)ifda;
	return NO_ERR;
}