Ну, наступило то время, когда я спаял всё и просмотрел код...
Возникли некие вопросы по коду:
#include <mega16.h>
// Standard Input/Output functions
#include <stdio.h>
#include <delay.h>
#include <spi.h>
static char Buffer[512];
char res;
unsigned int Clustervar;
unsigned long ByteSend =0;
unsigned int filenum = 0;
int Percent;
#define CLUST_RSRVD 0x0ffffff6
#define FALSE 0
#define DATA_PORT PORTA
#define WR_FLAG PORTC.6
#define STR_FLAG PORTC.7
#define OK_LED PORTC.3
#define AVR_RD PINC.5
#define Z80_RST PORTC.4
#include <mmc.c>
#include <fat.c>
//#include <lcd_init.h>
//#include <lcd_s.h>
#include <accel.h>
extern void fat_init(void);
//extern unsigned int Power_check(unsigned char adc_input);
unsigned long FAT_NextCluster(unsigned long cluster);
int play(void);
//extern int FAT_readCluster(unsigned long cluster, char sector_offset);
//extern void idinfo(unsigned long cluster);
unsigned long Size = 0;
void main(void)
{
unsigned int tmp,a;
char buf[6];
unsigned char Dir_Attrib = 20;
char h,m,s;
char Fname[] = "48.ROM";
//char Fname[] = "LOADER.TAP";
// setup SPI I/O pins
// SPI Port config
DDRB.4=1; // set SS as output
DDRB.5=1; // set MOSI as output
DDRB.6=0; // set MISO as input
DDRD.2=1; // SCK output
DDRD.3=1; // CS output
DDRB.0=1;
DDRB.2=1;
DDRB.1=1;
DDRB.4=1;
PORTD.3=1; // CS not active
PORTD.2=1; // set SCK hi
PORTB.1=0; // rst disp
PORTB.4=1;
// VS1001K Control def
// for LS020 TFT
/*
DDRC.6=1; //RS line is out
PORTC.6=1;
DDRC.5=1; //RESET line is out
PORTC.5 = 1;
DDRC.4=1; // CS line is out
PORTC.4=1;
*/
// Input/Output Ports initialization
// Port A initialization
// Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTA=0x00;
DDRA=0xFF;
//key defination pin
DDRC.5 = 0; // AVR_RD pin
DDRC.7 = 1; // AVR_WR pin
DDRC.6 = 1; // AVR_STR pin
DDRC.4 = 1; // Z80 reset pin
DDRC.3 = 1; // OK led pin
DDRC.0 = 0;
DDRC.1 = 0;
PORTC = 0x00;
//
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 19200
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x33;
// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
/*
// ADC initialization
// ADC Clock frequency: 500,000 kHz
// ADC Voltage Reference: Int., cap. on AREF
// ADC Auto Trigger Source: Free Running
ADMUX=ADC_VREF_TYPE;
ADCSRA=0xA5;
SFIOR&=0x1F;
*/
// SPI initialization
// SPI Type: Master
// SPI Clock Rate: 1000,000 kHz
// SPI Clock Phase: Cycle Half
// SPI Clock Polarity: Low
// SPI Data Order: MSB First
SPCR=0x51;
SPSR=0x00;
// I2C Bus initialization
//**********************************************
Z80_RST = 1;
OK_LED = 0;
PORTB.1=0;
delay_ms(10);
PORTB.1 = 1;
// LCD init
//sprintf(buf,"K&G");
//lcd_init();
//LCD_FillRect(0,0,132,176,black);
//put_str(50,50,buf,0,2);
//----------
printf("\r\nROM Loader for ZX Spectrum based on T80 & Xilinx FPGA\r\n");
printf("Try to init MMC/SD card... \r\n");
res = mmcReset();
if(res!=0)
{
printf("MMC init failed. Answer: %i\r\n",res);
}
else
{
fat_init();
for (a = 1;a < 240;a++)
{
Clustervar = fat_read_dir_ent(0,a,&Size,&Dir_Attrib,Buffer);
if (Clustervar == 0xffff){break;}
tmp = (Size & 0x0000FFFF);
printf("Cluster = %4x DirA = %2x FileName = ",Clustervar,Dir_Attrib);
printf("%s ",Buffer);
printf(" size: %3li ", File_Size);
printf("\r\n");
if(Dir_Attrib == ATTR_ARCHIVE) filenum++;
}
Clustervar = 0;//suche im Root Verzeichnis
if (fat_search_file(&Fname[0],&Clustervar,&Size,&Dir_Attrib,Buffer) == 1)
{
printf("Total %i files found\r\n",filenum);
printf("----------\r\n");
printf("\r\nFile: %s\r\n",Fname);
printf("Size: %3li Byte\r\n", Size);
printf("\nFile Found!!\r\n");
printf("----------\r\n");
WR_FLAG = 1;
printf("Waiting 4 sec for FPGA configuring...\r\n");
delay_ms(4000);
DATA_PORT = 0x00;
printf("CPU is WAIT for ROM be loaded\r\n");
STR_FLAG = 0;
printf("Reading file and loading ROM\r\n");
play();
}
else
{
printf("File not found\r\n");
};
OK_LED = 1;
WR_FLAG = 0;
STR_FLAG = 0;
DATA_PORT = 0x00;
printf("Loading complete\r\n");
printf("Z80 CPU reset\r\n");
Z80_RST = 0;
delay_ms(500);
Z80_RST = 1;
printf("Ok\r\n");
printf("End program\r\n");
};
printf("Do work wihtout SD/MMC\r\n");
//lcd_init();
//LCD_FillRect(0,0,132,176,black);
while(1)
{
//put_str(10,10,buf,0,1);
//delay_ms(800);
};
}
unsigned long FAT_NextCluster(unsigned long cluster)
{
int result=0;
unsigned long sector,position,next;
if (cluster ==0 ) cluster = 2;
sector = cluster / 256;
result = mmcRead(FAT16_fat_begin_lba+sector,Buffer);
if (result) return 0;
position = (cluster - (sector * 256)) * 2;
next = Buffer[position+1];
next <<= 8;
next += Buffer[position];
if (next == 0xffff) next = 0xffffffff;
return next;
}
int play(void)
{
unsigned long LBA,i,j,NextCluster;
long index = 0;
NextCluster = Clustervar;
while (1)
{
LBA = FAT_cluster2lba(NextCluster);
for (i=0;i<sectors_per_cluster;i++)
{
mmcRead(LBA+i,Buffer);
for (j=0;j<bytes_per_sector;j++)
{
DATA_PORT = Buffer[j];
STR_FLAG = 1;
delay_us(50);
STR_FLAG = 0;
delay_us(500);
index++;
if(index > (Size - 1)) {printf("End Of File\r\n");return 1;};
}
}
ByteSend += (bytes_per_sector * sectors_per_cluster);
Percent = (ByteSend / (File_Size / 100));
NextCluster = FAT_NextCluster(NextCluster);
if (NextCluster > CLUST_RSRVD) break;
//printf("Byte send: %i \r\n",ByteSend);
}
return 0x01; // Next Song
}
не подскажете где висит CMD/DI и DAT/DO?
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