sblcd.c

ADS1241与MSP430F449接口设计

/* Code for driving the lcd on the HPA449 */

/* HPA449 LCD config:

- Segment 0 used for turning off unused segments.  Normally off.
- Antenna and alpha digit 7 tied to S1.  Normally off.
- Segs 2-11, 16-35 connected to elements.
- Segs 12-15 switched between seg 0 or certain elements.
- Segs 36-39 used for SPI only, not available for LCD.

See also lcdmap.txt
*/

#include "sblcd.h"

typedef struct seginfo 
{
	volatile char *loc;
	unsigned char mask;
} seginfo;

#include "sblcd_charset.c"

void sblcd_seg_set(const seginfo *si, int on);

// This LCD init turns all segments off.

void sblcd_init(void)
{
	int i;
	volatile char *volatile mp=&LCDM1;

   // (GH) init port functions and direction 
	P4OUT = 0xc0;
	P4DIR = 0x00;
	P4SEL = 0xf8;

	P5OUT = 0xff;
	P5DIR = 0x00;
	P5SEL = 0xff;

	P6OUT = 0xff;
	P6DIR = 0x00;
	P6SEL = 0xff;

	//BTCTL=0010 1000
	BTCTL=0x28;

	for (i=0;i<20;++i) {
		*mp=0;
		++mp;
	}
	//lcdctl=1101 1101
	LCDCTL=LCDP2|LCDP1|LCDP0|LCDMX1|LCDMX0|LCDSON|LCDON;
}

void sblcd_lg_showc(char c, int position)
{
	volatile char *base;
	u16 digits;
	
	if (position<0) return;
	if (position>=SBLCD_LG_DIGITS) return;
	if (c<' ') return;
	if (c>='a'&&c<='z')
		c-=0x20;
	if (c>'Z') return;
	base=&LCDM17 - position*2;
	digits=starburst_segments[c-' '];
	base[0] = digits;
	base[1] = (digits>>8)|(base[1]&0x90);  
}

void SBLCD_SEG_SET(volatile char *loc, u8 mask, int on)
{
	if (on)
		SBLCD_SEG_ON((volatile char *)loc,mask);
	else
		SBLCD_SEG_OFF((volatile char *)loc,mask);
}

void sblcd_seg_set(const seginfo *si, int on)
{
	if (on)
		sblcd_seg_on(si);
	else
		sblcd_seg_off(si);
}

void sblcd_lg_dp_set(int ind, int on)
{
	--ind;
	if (ind<0) return;
	if (ind>=6) return;
	if (ind>=SBLCD_LG_DIGITS) return;
	sblcd_seg_set(&(lgdptbl[ind]),on);
}

void sblcd_lg_colon_set(int ind, int on)
{
	--ind;
	if (ind<0) return;
	if (ind>=5) return;
	if (ind>=SBLCD_LG_DIGITS) return;
	sblcd_seg_set(&(lgcolontbl[ind]),on);
}

void sblcd_lg_alldpcolonoff(void)
{
	int i;

	for (i=1;i<7;++i) {
		sblcd_lg_colon_off(i);
		sblcd_lg_dp_off(i);
	}
}

/* Shows a string on the alpha portion of the HPA449's LCD */
void sblcd_lg_showstr(char *c)
{
	int i,blank=0;

	if (*c=='+') {
		sblcd_plus_on();
		sblcd_minus_off();
		c++;
	} else if (*c=='-') {
		sblcd_minus_on();
		sblcd_plus_off();
		c++;
	} else {
		sblcd_minus_off();
		sblcd_plus_off();
	}
	sblcd_lg_alldpcolonoff();
	for (i=0;i<SBLCD_LG_DIGITS;++i) {
		if (!blank)
			if (!*c)
				blank=1;
		if (blank)
			sblcd_lg_showc(' ',i);
		else {
			if (*c=='.') {
				sblcd_lg_dp_on(i);
				sblcd_lg_colon_off(i);
				--i;
			} else if (*c==':') {
				sblcd_lg_colon_on(i);
				sblcd_lg_dp_off(i);
				--i;
			} else {
				sblcd_lg_showc(*c,i);
			}
			++c;
		}
	}
}

#if SBLCD_HAVE_BARGRAPH

void sblcd_bg_set(u16 segs)
{
	int i;

	SBLCD_SEG_SET(SBLCD_SEG_BGR,segs&1);
	SBLCD_SEG_SET(SBLCD_SEG_BGL,segs&(1<<11));
	for (i=9;i>=0;--i){
		segs=segs>>1;
		sblcd_seg_set(&bargraphtbl[i],segs&1);
	}
}

void sblcd_bg_centre(int val)
{
	val+=5;
	if (val<0) val=0;
	if (val>10) val=10;
	sblcd_bg_set(bgcentretbl[val]);
}

void sblcd_bg_onedot(int val)
{
	if (val<0) val=0;
	if (val>11) val=11;
	sblcd_bg_set(bgonedottbl[val]);
}

void sblcd_bg_lr(int val)
{
	if (val<0) val=0;
	if (val>10) val=10;
	sblcd_bg_set(bglrtbl[val]);
}

#endif

// ---- small 7-seg display ----------------------------------------------

unsigned char chrtosegs(char c)
{
	if (c>='a'&&c<='z')
		c-=0x20;
	if (c>=' '&&c<='Z')
		return segtbl[c-' '];
	if (c=='_')
		return 8;
	if (c=='|')
		return 6;
	if (c=='`')
		return 0x20;
	return 0;
}

// seg: 6=a, 5=b, ... , 0=g
void sblcd_sm_seg_set(int seg, int pos, int on)
{
	sblcd_seg_set(&(smsegtbl[pos*7+seg]),on);
}

void sblcd_sm_showsegs(u8 segs, int pos)
{
	int i;

	for (i=0;i<7;++i) {
		sblcd_sm_seg_set(i,pos,segs&1);
		segs=segs>>1;
	}
}

void sblcd_sm_dp_set(int ind, int on)
{
	--ind;
	if (ind<0) return;
	if (ind>=3) return;
	sblcd_seg_set(&(smdptbl[ind]),on);
}

void sblcd_sm_showc(char c, int pos)
{
	u8 segs;
	
	if (pos<0) return;
	if (pos>3) return;
	segs=chrtosegs(c);
	sblcd_sm_showsegs(segs,pos);
}

void sblcd_sm_showstr(char *c)
{
	int i,blank=0,colon=0;

	sblcd_sm_dp_off(1);
	sblcd_sm_dp_off(2);
	sblcd_sm_dp_off(3);
	for (i=0;i<4;++i) {
		if (!blank) {
			if (!*c) blank=1;
		}
		if (blank)
			sblcd_sm_showc(' ',i);
		else {
			if (*c==':') {
				if (i==2)
					colon=1;
				--i;
			} else if (*c=='.') {
				sblcd_sm_dp_on(i);
				if (i==2)
					colon=0;
				--i;
			} else {
				sblcd_sm_showc(*c,i);
			}
			++c;
		}
	}
	sblcd_sm_colon_set(colon);
}