osd.c

来自「Verilog, c and asm source codes of the M」· C语言 代码 · 共 444 行 · 第 1/2 页

0x00,0x00,0x00,0x00,0x00,         // 192 	[0xc0]
0x00,0x00,0x00,0x00,0x00,         // 193 	[0xc1]
0x00,0x00,0x00,0x00,0x00,         // 194 	[0xc2]
0x00,0x00,0x00,0x00,0x00,         // 195 	[0xc3]
0x00,0x00,0x00,0x00,0x00,         // 196 	[0xc4]
0x00,0x00,0x00,0x00,0x00,         // 197 	[0xc5]
0x00,0x00,0x00,0x00,0x00,         // 198 	[0xc6]
0x00,0x00,0x00,0x00,0x00,         // 199 	[0xc7]
0x00,0x00,0x00,0x00,0x00,         // 200 	[0xc8]
0x00,0x00,0x00,0x00,0x00,         // 201 	[0xc9]
0x00,0x00,0x00,0x00,0x00,         // 202 	[0xca]
0x00,0x00,0x00,0x00,0x00,         // 203 	[0xcb]
0x00,0x00,0x00,0x00,0x00,         // 204 	[0xcc]
0x00,0x00,0x00,0x00,0x00,         // 205 	[0xcd]
0x00,0x00,0x00,0x00,0x00,         // 206 	[0xce]
0x00,0x00,0x00,0x00,0x00,         // 207 	[0xcf]
0x00,0x00,0x00,0x00,0x00,         // 208 	[0xd0]
0x00,0x00,0x00,0x00,0x00,         // 209 	[0xd1]
0x00,0x00,0x00,0x00,0x00,         // 210 	[0xd2]
0x00,0x00,0x00,0x00,0x00,         // 211 	[0xd3]
0x00,0x00,0x00,0x00,0x00,         // 212 	[0xd4]
0x00,0x00,0x00,0x00,0x00,         // 213 	[0xd5]
0x00,0x00,0x00,0x00,0x00,         // 214 	[0xd6]
0x00,0x00,0x00,0x00,0x00,         // 215 	[0xd7]
0x00,0x00,0x00,0x00,0x00,         // 216 	[0xd8]
0x00,0x00,0x00,0x00,0x00,         // 217 	[0xd9]
0x00,0x00,0x00,0x00,0x00,         // 218 	[0xda]
0x00,0x00,0x00,0x00,0x00,         // 219 	[0xdb]
0x00,0x00,0x00,0x00,0x00,         // 220 	[0xdc]
0x00,0x00,0x00,0x00,0x00,         // 221 	[0xdd]
0x00,0x00,0x00,0x00,0x00,         // 222 	[0xde]
0x00,0x00,0x00,0x00,0x00,         // 223 	[0xdf]
0x00,0x00,0x00,0x00,0x00,         // 224 	[0xe0]
0x00,0x00,0x00,0x00,0x00,         // 225 	[0xe1]
0x00,0x00,0x00,0x00,0x00,         // 226 	[0xe2]
0x00,0x00,0x00,0x00,0x00,         // 227 	[0xe3]
0x00,0x00,0x00,0x00,0x00,         // 228 	[0xe4]
0x00,0x00,0x00,0x00,0x00,         // 229 	[0xe5]
0x00,0x00,0x00,0x00,0x00,         // 230 	[0xe6]
0x00,0x00,0x00,0x00,0x00,         // 231 	[0xe7]
0x00,0x00,0x00,0x00,0x00,         // 232 	[0xe8]
0x04,0x54,0x50,0x14,0x44,         // 233 	[0xe9]
0x00,0x00,0x00,0x00,0x00,         // 234 	[0xea]
0x00,0x00,0x00,0x00,0x00,         // 235 	[0xeb]
0x10,0x22,0x10,0x22,0x10,         // 236 	[0xec]
0x10,0x22,0x20,0x22,0x10,         // 237 	[0xed]
0x20,0x22,0x20,0x22,0x20,         // 238 	[0xee]
0x40,0x22,0x20,0x22,0x40,         // 239 	[0xef]
0x00,0x00,0x00,0x00,0x00,         // 240 	[0xf0]
0x00,0x00,0x00,0x00,0x00,         // 241 	[0xf1]
0x00,0x00,0x00,0x00,0x00,         // 242 	[0xf2]
0x00,0x00,0x00,0x00,0x00,         // 243 	[0xf3]
0x00,0x00,0x00,0x00,0x00,         // 244 	[0xf4]
0x00,0x00,0x00,0x00,0x00,         // 245 	[0xf5]
0x00,0x00,0x00,0x00,0x00,         // 246 	[0xf6]
0x00,0x00,0x00,0x00,0x00,         // 247 	[0xf7]
0x00,0x00,0x00,0x00,0x00,         // 248 	[0xf8]
0xfe,0x7b,0xff,0x7b,0xfe,         // 249 	[0xf9]
0xfe,0x7a,0xfe,0x7a,0xfe,         // 250 	[0xfa]
0xfc,0x78,0xfc,0x78,0xfc,         // 251 	[0xfb]
0xf8,0x78,0xf8,0x78,0xf8,         // 252 	[0xfc]
0xf0,0x70,0xf0,0x70,0xf0,         // 253 	[0xfd]
0xe0,0x60,0xe0,0x60,0xe0,         // 254 	[0xfe]
0xc0,0x40,0xc0,0x40,0xc0          // 255 	[0xff]
;

/*some constants*/
#define OSDNLINE		8			/*number of lines of OSD*/
#define	OSDLINELEN		128			/*single line length in bytes*/
#define	OSDCMDREAD		0x00		//OSD read controller/key status
#define	OSDCMDWRITE		0x20		//OSD write video data command
#define	OSDCMDENABLE	0x60		//OSD enable command
#define	OSDCMDDISABLE	0x40		//OSD disable command
#define	OSDCMDRESET		0x80		//OSD reset command
#define	OSDCMDFILTER	0xE0		//OSD settings: filter
#define	OSDCMDMEMCFG	0xF0		//OSD settings: memory config

#define REPEATTIME		50			/*repeat delay in 10ms units*/
#define REPEATRATE		5			/*repeat rate in 10ms units*/


/*write a null-terminated string <s> to the OSD buffer starting at line <n>*/
void OsdWrite(unsigned char n,const unsigned char *s,char invert)
{
	unsigned char b;
	const unsigned char *p;
	
	/*select OSD SPI device*/
	EnableOsd();

	/*select buffer and line to write to*/
	if (invert)
		SPI(OSDCMDWRITE|0x10|n);
	else
		SPI(OSDCMDWRITE|n);

	/*send all characters in string to OSD*/
	while(1)
	{
		b=*(s++);
		
		if(b==0)/*end of string*/
			break;
		else if(b==0x0d || b==0x0a)//cariage return / linefeed, go to next line
		{
			/*increment line counter*/
			if(++n>=OSDNLINE)
				n=0;
			/*send new line number to OSD*/	
			DisableOsd();
			EnableOsd();
			SPI(OSDCMDWRITE|n);
		}
		else/*normal character*/
		{
			SPI(0x00);
			p=&charfont[b][0];
			SPI(*(p++));	
			SPI(*(p++));	
			SPI(*(p++));	
			SPI(*(p++));	
			SPI(*(p++));
		}
	}
	/*deselect OSD SPI device*/
	DisableOsd();
}
	
/*clear buffer <c>*/
void OsdClear(void)
{
	unsigned short n;
	
	/*select OSD SPI device*/
	EnableOsd();
	
	/*select buffer to write to*/
	SPI(OSDCMDWRITE|0x18);
	
	/*clear buffer*/
	for(n=0;n<(OSDLINELEN*OSDNLINE);n++)
		SPI(0x00);
		
	/*deselect OSD SPI device*/
	DisableOsd();
}

/*enable displaying of OSD*/
void OsdEnable(void)
{
	/*send command*/
	EnableOsd();
	SPI(OSDCMDENABLE);
	DisableOsd();
}

/*disable displaying of OSD*/
void OsdDisable(void)
{
	/*send command*/
	EnableOsd();
	SPI(OSDCMDDISABLE);
	DisableOsd();
}

void OsdReset(unsigned char boot)
{
	EnableOsd();
	SPI(OSDCMDRESET | (boot&0x01));
	DisableOsd();
}

void OsdFilter(unsigned char lr_filter, unsigned char hr_filter)
{
	EnableOsd();
	SPI(OSDCMDFILTER | ((hr_filter&0x03)<<2) | (lr_filter&0x03));
	DisableOsd();
}

void OsdMemoryConfig(unsigned char memcfg)
{
	EnableOsd();
	SPI(OSDCMDMEMCFG | (memcfg&0x03));
	DisableOsd();
}

/*get key status*/
unsigned char OsdGetCtrl(void)
{
	static unsigned char c2;
	static unsigned short repeat;
	unsigned char c1,c;

	/*send command and get current ctrl status*/
	EnableOsd();
	c1=SPI(OSDCMDREAD);
	DisableOsd();

	/*add front menu button*/
	if(CheckButton())
		c1|=OSDCTRLMENU;	

	/*generate normal "key-pressed" event*/
	c=c1&(~c2);
	c2=c1;
	
	/*generate repeat "key-pressed" events
	do not for menu button*/
	if(!c1)
		repeat=GetTimer(REPEATTIME);
	else if(CheckTimer(repeat))
	{
		repeat=GetTimer(REPEATRATE);
		c=c1&(~OSDCTRLMENU);
	}
	
	/*return events*/
	return(c);	
}