mmc_test.cp

mmc/sd卡的实现源码

#line 1 "D:/projects/in_progress/0035 primeri_za_plocice/__MMC_SD/mikroC/MMC_Test.c"
#line 27 "D:/projects/in_progress/0035 primeri_za_plocice/__MMC_SD/mikroC/MMC_Test.c"
unsigned int px, k;


unsigned char data[512];
unsigned char data_for_registers[16];

unsigned char MMC_SPI(unsigned char out);
unsigned char MMC_Send_Command(unsigned char partial_cmm, unsigned long address, unsigned char CRC);
unsigned char MMC_Init();
unsigned char MMC_Read_Sector(unsigned long sector, char *data);
unsigned char MMC_Write_Sector(unsigned long sector, char *data);
unsigned char MMC_Read_CID(char * data_for_registers);
unsigned char MMC_Read_CSD(char * data_for_registers);





unsigned char received_character;
unsigned long sector_address;
unsigned char first_byte, second_byte, third_byte, fourth_byte;
unsigned char serial_buffer[2];
unsigned char serial_pointer;


void printhex(unsigned char i) {
 unsigned char hi,lo;
 hi = i & 0xF0;
 hi = hi >> 4;
 hi = hi + '0';
 if (hi>'9') hi = hi + 7;
 lo = (i & 0x0F) + '0';
 if (lo>'9') lo=lo+7;
 USART_Write(hi);
 USART_Write(lo);
}

void main() {
 unsigned int i;

 PORTC = 0;

 USART_Init(19200);


 TRISC = 0b11010011;


 USART_Write('P');
 USART_Write('I');
 USART_Write('C');
 USART_Write('-');
 USART_Write('S');
 USART_Write('t');
 USART_Write('a');
 USART_Write('r');
 USART_Write('t');
 USART_Write('e');
 USART_Write('d');
 USART_Write(13);
 USART_Write(10);



 i = MMC_Init();


 if(i == 1) {
 USART_Write('M');
 USART_Write('M');
 USART_Write('C');
 USART_Write('I');
 USART_Write('n');
 USART_Write('i');
 USART_Write('t');
 USART_Write('-');
 USART_Write('O');
 USART_Write('K');
 USART_Write(13);
 USART_Write(10);
 }
 if(i == 0) {
 USART_Write('M');
 USART_Write('M');
 USART_Write('C');
 USART_Write('I');
 USART_Write('n');
 USART_Write('i');
 USART_Write('t');
 USART_Write('-');
 USART_Write('E');
 USART_Write('r');
 USART_Write('r');
 USART_Write(13);
 USART_Write(10);
 }


 for(i=0; i<=511; i++) data[i] = 'E';
 i = MMC_Write_Sector(55, data);


 if(i == 0)
 {
 Usart_Write('U');
 Usart_Write('p');
 Usart_Write('i');
 Usart_Write('s');
 Usart_Write('-');
 Usart_Write('O');
 Usart_Write('K');
 }
 else
 {
 Usart_Write('U');
 Usart_Write('p');
 Usart_Write('i');
 Usart_Write('s');
 Usart_Write('-');
 Usart_Write('E');
 Usart_Write('r');
 Usart_Write('r');
 }
 USART_Write(13);
 USART_Write(10);




 i = MMC_Read_CID(data_for_registers);
 if(i == 0) {
 for(k=0; k<=15; k++) {
 printhex(data_for_registers[k]);
 if(k!=15) USART_Write('-');
 }
 USART_Write(13);
 }
 else {
 Usart_Write('C');
 Usart_Write('I');
 Usart_Write('D');
 Usart_Write('-');
 Usart_Write('E');
 Usart_Write('r');
 Usart_Write('r');
 }
 i == MMC_Read_CSD(data_for_registers);
 if(i == 0) {
 for(k=0; k<=15; k++) {
 printhex(data_for_registers[k]);
 if(k!=15) USART_Write('-');
 }
 USART_Write(13);
 USART_Write(10);
 }
 else {
 Usart_Write('C');
 Usart_Write('S');
 Usart_Write('D');
 Usart_Write('-');
 Usart_Write('E');
 Usart_Write('r');
 Usart_Write('r');
 }



 serial_pointer = 0;


 while(1)
 {
 if (USART_Data_Ready())
 {
 serial_buffer[serial_pointer] = USART_Read();
 serial_pointer++;
 if(serial_pointer>1)
 {
 serial_pointer = 0;

 if(serial_buffer[0] == 'S') first_byte = serial_buffer[1];
 if(serial_buffer[0] == 's') second_byte = serial_buffer[1];
 if(serial_buffer[0] == 'E') third_byte = serial_buffer[1];
 if(serial_buffer[0] == 'e') fourth_byte = serial_buffer[1];
 if(serial_buffer[0] == 'R')
 {
 if(serial_buffer[1] == 'r')
 {
 sector_address = ((long)first_byte << 24) + ((long)second_byte << 16) +
 ((long)third_byte << 8) + ((long)fourth_byte);
 i = MMC_Read_Sector(sector_address,data);
 if(i == 0)
 {
 for(k=0; k<512; k++)
 {
 printhex(data[k]);
 USART_Write(' ');
 if(((k+1) % 16)==0)
 {
 USART_Write(' ');
 for(px=(k-15); px<=k; px++)
 {
 if((data[px]>33) && (data[px]<126))
 {
 USART_Write(data[px]);
 }
 else
 {
 USART_Write('.');
 }
 }
 USART_Write(13);
 }
 }
 USART_Write(13);
 USART_Write(10);
 }
 else
 {
 USART_Write('R');
 USART_Write('d');
 USART_Write('-');
 USART_Write('E');
 USART_Write('r');
 USART_Write('r');
 USART_Write(13);
 USART_Write(10);
 }
 }
 }
 if(serial_buffer[0] == 'W')
 {
 if(serial_buffer[1] == 'w')
 {

 sector_address = ((long)first_byte << 24) + ((long)second_byte << 16) +
 ((long)third_byte << 8) + ((long)fourth_byte);
 for(k=0; k<512; k++) data[k] = received_character;
 i = MMC_Write_Sector(sector_address, data);
 if(i != 0)
 {

 USART_Write('W');
 USART_Write('r');
 USART_Write('-');
 USART_Write('E');
 USART_Write('r');
 USART_Write('r');
 USART_Write(13);
 USART_Write(10);
 }
 else
 {
 USART_Write('W');
 USART_Write('r');
 USART_Write('-');
 USART_Write('O');
 USART_Write('K');
 USART_Write(13);
 USART_Write(10);
 }
 }
 }
 if(serial_buffer[0] == 'C')
 {
 received_character = serial_buffer[1];
 }
 }
 }
 }
}