📄 cl680.c
字号:
/************************************************************************************
* MPEG control code *
* *
*use: cl680 *
* vcd1.1 *
************************************************************************************/
#define MPEG_DigestReady 0
#define MPEG_DisplayDigest 2
#define MPEG_DisplayGraphics 4
#define MPEG_Logo 6
unsigned char code mpeg_cmd[]=
{
0x00,0x1D, //MPEG_DigestReady();
0x04,0x1B, //MPEG_DisplayDigest();
//0x00,0x00,
//0x00,0x00,
//0x00,0x00,
//0xff,0xff,
0x06,0x17, //MPEG_DisplayGraphics();
0x03,0x0c, //MPEG_DisplayRomStill();
0x00,0x00,
0x80,0x00,
0x3e,0x30,
0x00,0x00,
0x00,0x0C, //MPEG_DisplayStill();
0x01,0x22, //MPEG_PitchShift();
0x00,0x0B, //MPEG_Play();
0x02,0x13, //MPEG_SetStreams();
0x00,0x05, //MPEG_SetVideoFormat();
0x01,0x85, //MPEG_SetVolume();
0x01,0x09, //MPEG_Slow();
//0x00,0x00,
}
void MPEG_DigestReady(void)
{
MPEG_write_command(MPEG_DigestReady,1);
}
void MPEG_SetFormt(unsigned char video_format)
{
MPEG_write(MPEG_ADDR_VIDEO_FORMAT,video_format );
MPEG_write_command(MPEG_SetVideoFormat,0,0,0,0,0,0,1);
}
void MPEG_Pitch(unsigned char pitchshift)
{
if(pitchshif>7)
MPEG_write_command(MPEG_PitchShift,pitchshift -7,0,0,0,0,2);
else
MPEG_write_command(MPEG_PitchShift,(0xffff-pitchshift+1) & 0xffff ,0,0,0,0,2);
}
#define MPEG_ADDR_CMD_ID (MPEG_ADDR_DRAM_NAUTO|0x00C8)
#define MPEG_ABORT 0x801A
#define MPEG_RESET 0x8000
void MPEG_Abort(void)
{
while(MPEG_read(MPEG_ADDR_CMD_ID) );
MPEG_write(MPEG_ADDR_CMD_ID,MPEG_ABORT);
}
void MPEG_Reset(void)
{
while(MPEG_read(MPEG_ADDR_CMD_ID) );
MPEG_write(MPEG_ADDR_CMD_ID,MPEG_RESET);
}
void MPEG_Logo(void)
{
MPEG_write_command(MPEG_Logo,0,0,0,0,0,0,5);
}
unsigned int MPEG_read(unsigned long ReadAddr)
{
unsigned char i;
unsigned int Data;
MPEG_write_address(ReadAddr);
MPEG_HDAT_HIGH; //issue R/W =1
MPEG_HCK_LOW;
MPEG_HCK_HIGH;
MPEG_HSEL_LOW;
for(i=0;i<255;++)
{
if(MPEG_HRDY_HIGH) break;
}
if(i==255)return 0;
for(i=0;i<16;i++)
{
MPEG_HCK_LOW;
Data |= MPEG_HDAT_HIGH?(1:0);
MPEG_HCK_HIGH;
Data <<= 1;
}
MPEG_HSEL_HIGH;
return Data;
}
unsigned int MPEG_write(unsigned long WriteAddr,unsigned int WriteData)
{
unsigned char i;
for(i=0;i<255;++)
{
if(MPEG_HRDY_HIGH) break;
}
if(i==255)return 0;
MPEG_write_address(WriteAddr);
MPEG_HDAT_LOW;
MPEG_HCK_LOW;
MPEG_HCK_HIGH; //ISSUE R/W = 0;
MPEG_HSEL_LOW;
for(i=0;i<16;i++)
{
WriteData <<= 1;
MPEG_HDAT =(bit)( WriteData & 0x80);
MPEG_HCK_LOW;
MPEG_HCK_HIGH;
}
MPEG_HSEL_HIGH;
return 1;
}
char MPEG_write_address(unsigned long Waddress)
{
unsigned char i,BAddr;
MPEG_HSEL_HIGH;
BAddr = Waddress >> 16;
if((BAddr & 0xc0) == MPEG_ADDR_GBUS)
{
// For write GBUS address, only output 8 bits
// for now, assume that GBUS address will be in A21 - A16
// fill A23, A24 with zeros
BAddr & = 0x3f;
for(i=0;i<8;i++)
{
BAddr <<= 1;
MPEG_HDAT = (bit)(BAddr & 0x80);
MPEG_HCK_LOW;
MPEG_HCK_HIGH;
}
MPEG_HDAT_HIGH; //issue G/M# =1
MPEG_HCK_LOW;
MPEG_HCK_HIGH;
}
else
{
WAddress << = 2;
for(i=0;i<22;i++)
{
WAddress <<= 1;
MPEG_HDAT = (bit)(BAddr & 0x80);
MPEG_HCK_LOW;
MPEG_HCK_HIGH;
}
MPEG_HDAT_LOW; //issue G/M# =0
MPEG_HCK_LOW;
MPEG_HCK_HIGH;
//if autoinc bit is set, then increment address
if((BAddr & 0xc0) == MPEG_ADDR_DRAM_AUTO)
MpegAddress++;
}
}
void MPEG_write_command(unsigned char cmd_id,unsigned int cmd_p0,unsigned int cmd_p1,unsigned int cmd_p2,unsigned int cmd_p3,unsigned int cmd_p4,unsigned int cmd_p5,unsigned char cmd_count)
{
unsigned char i;
unsigned int Data;
unsigned int temp[];
temp[0] = cmd_p1;
temp[1] = cmd_p2;
temp[2] = cmd_p3;
temp[3] = cmd_p4;
temp[4] = cmd_p5;
MpegAddress = MPEG_ADDR_DRAM_NAUTO;
Data = MPEG_read(MPEG_CMDF_WRITE); //Read out write pointer,shuold be 0x80--0xc0;
if((Data & 0x00ff) == CMDF_SADDR) Data = ADDR_CMD_FIFO_START; //ADDR_CMD_FIFO_START = 0x80;
//CMDF_SADDR = 0xc0;
MpegAddress |= Data;
for(i=0;i<cmd_count;i++)
{
if(cmd_id == MPEG_SetVoume ||cmd_id == MPEG_Slow||)
Data = temp[i];
else
Data = mpeg_cmd[i+cmd_id];
MPEG_write(MpegAddress,Data);
MpegAddress++;
if((MpegAddress & 0xffff) == CMDF_SADDR) Data = ADDR_CMD_FIFO_START;
}
}
MPEG_write(MPEG_CMDF_WRITE,(unsigned int)MpegAddress);
}
char MPEG_read_para(void)
{
MpegMinSec = MPEG_read(MPEG_ADDR_MINSEC); //0x00F8 Minutes,seconds
MpegFCh = MPEG_read(MPEG_ADDR_FCh); //0x00FA FileNumber,ChanelNumber
MpegCodeInfo = MPEG_read(MPEG_ADDR_CODING); //0x00FB CodingInfo
}
void MPEG_servo(void)
{
unsigned int MpegMinSec,MpegFCh,MpegCodeInfo;
switch(mpeg_task)
{
case MPEG_IDLE:
MpegMinSec = MPEG_read(MPEG_ADDR_MINSEC); //0x00F8 Minutes,seconds
MpegFCh = MPEG_read(MPEG_ADDR_FCh); //0x00FA FileNumber,ChanelNumber
MpegCodeInfo = MPEG_read(MPEG_ADDR_CODING); //0x00FB CodingInfo
if(MpegMinSec)
{
switch((MpegFCh>>8) & 0xff)
{
case 0:
if(!MPEG_STILL_flag)
{
MPEG_STILL_flag = 1;
mpeg_task = MPEG_VCD20_PROC;
}
break;
case 1:
if(MPEG_STILL_flag)
{
if((MpegFCh & 0xff) ==1)
{
if(( (MpegCodeInfo & 0xff) == 0x7f)||( (MpegCodeInfo & 0xff) == 0x0f))
mpeg_task = MPEG_VCD11_PROC;
}//if((MpegFCh & 0xff) ==1)
}//if(MPEG_STILL_flag)
else
{
if(( MpegMinSec>>8) && 0xff){
if((((MpegFCh & 0xff) ==2) && ((MpegCodeInfo & 0xff) ==0x1F))||(((MpegFCh & 0xff) ==3) && ((MpegCodeInfo & 0xff) ==0x3F)))
mpeg_task = MPEG_VCD20_PROC;
}
else
{
if((MpegMinSec >= 3) && (MpegMinSec <6))mpeg_task =MPEG_VCD20_PROC;
else
if(MpegMinSec >= 6){
if((((MpegFCh & 0xff) ==2) && ((MpegCodeInfo & 0xff) ==0x1F))||(((MpegFCh & 0xff) ==3) && ((MpegCodeInfo & 0xff) ==0x3F)))
mpeg_task = MPEG_VCD20_PROC;
}
}
}
break;
default:
mpeg_task = MPEG_VCD11_PROC;
break;
}//switch((MpegFCh>>8) & 0xff)
}//if(MpegMinSec)
else
{ //MpegMinSec = 0;
}
break;
case MPEG_VCD11_PROC:
if(!MPEG_STILL_flag) break;
MPEG_STILL_flag = 0;
MPEG_Abort();
mpeg_task = MPEG_STREAM_PLAY;
break;
case MPEG_VCD20_PROC:
if(MPEG_STILL_flag) break;
MPEG_STILL_flag = 1;
MPEG_Abort();
mpeg_task = MPEG_STREAM_PLAY;
break;
case MPEG_STREAM_PLAY:
if(MPEG_STILL_flag) {
MPEG_write_command(MPEG_SetStream,0x00E1,0x00C0,0,0,0,3);
MPEG_write_command(0x0C,0,0,0,0,0,3);
}
else
{
MPEG_write_command(MPEG_SetStream,0x00E0,0x00C0,0,0,0,3);
MPEG_write_command(0x0D,0,0,0,0,0,3);
}
mpeg_task = MPEG_IDLE;
break;
case MPEG_RESET_START:
MPEG_RESET_HIGH;
mpeg_task++;
break;
case MPEG_RESET_ACTION:
MPEG_RESET_LOW;
mpeg_task++;
break;
case MPEG_RESET_END:
MPEG_RESET_HIGH;
mpeg_task = 0;
break;
case MPEG_SLOW_ACTION:
MPEG_write_command(MPEG_SLOW,slow_state++,0,0,0,0,0,2);
break;
case MPEG_PLAY_START:
MPEG_Abort();
MPEG_write_command(MPEG_Play,1);
mpeg_task++;
break;
case MPEG_PLAY_CHECK:
if(MPEG_read(MPEG_ADDR_PROC_STATE) == MPEG_Play)mpeg_task = MPEG_IDLE;
else mpeg_task = MPEG_PLAY_START;
break;
default:
break;
}//switch(mpeg_task)
}
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -