Thanks,
Justin
Code: Select all
/*
* Project name:
Mmc_Fat16_Test (Demonstration on usage of Mmc_Fat16 library)
* Platforms:
dsPIC, PIC;
* Copyright:
(c) MikroElektronika, 2005 - 2006
* Revision History:
20060420:
- Initial release for the dsPIC platform;
20060201:
- added test for swap file creation, to reflect changes in the
mmc_fat16 library;
20051204:
- added test for file delete, to reflect changes in the mmc_fat16 library;
20050512:
- initial release;
* Description:
This project consists of several blocks that demonstrat various aspects of
usage of the Mmc_Fat16 library. These are:
- Creation of new file and writing down to it;
- Opening existing file and re-writing it (writing from start-of-file);
- Opening existing file and appending data to it (writing from end-of-file);
- Opening a file and reading data from it (sending it to USART terminal);
- Creating and modifying several files at once;
- Reading file contents;
- Deleting file(s);
- Creating the swap file (see Help for details);
* Test configuration:
MCU: PIC24FJ96GA010
Dev.Board: LV 24-33
Oscillator: XT-PLL, 10.000MHz
Ext. Modules: None.
SW: mikroC for dsPIC30/33 and PIC24 v3.0.0.0
* NOTES:
- Please make sure that MMC card is properly formatted (to FAT16 or just FAT)
before testing it on this example!
- Enable MMC on switch SW1
- This example expects MMC card to be inserted before reset, otherwise,
the FAT_ERROR message is displayed!!!
*/
#include <spi_const.h>
const char SWAP_FILE_MSG[] = "Swap file at: ";
char
fat_txt[20] = "FAT16 not found",
file_contents[50] = "XX MMC/SD FAT16 library by Anton Rieckert\n";
char
filename[14] = "MIKRO00xTXT"; // File names
unsigned
loop, loop2;
unsigned short
caracter;
unsigned long
i, size;
char Buffer[512];
//I-I-I--------- Writes string to USART
void I_Write_Str(char *ostr) {
unsigned i;
i = 0;
while (ostr[i]) {
Uart1_Write_Char(ostr[i++]);
}
}//~
//M-M-M--------- Creates new file and writes some data to it
void M_Create_New_File() {
filename[7] = 'A';
Mmc_Fat_Assign(&filename, 0xA0); // Will not find file and then create file
Mmc_Fat_Rewrite(); // To clear file and start with new data
for(loop = 1; loop <= 99; loop++) { // We want 5 files on the MMC card
Uart1_Write_Char('.');
file_contents[0] = loop / 10 + 48;
file_contents[1] = loop % 10 + 48;
Mmc_Fat_Write(file_contents, 42); // write data to the assigned file
}
}//~
//M-M-M--------- Creates many new files and writes data to them
void M_Create_Multiple_Files() {
for(loop2 = 'B'; loop2 <= 'Z'; loop2++) {
Uart1_Write_Char(loop2); // signal the progress
filename[7] = loop2; // set filename
Mmc_Fat_Assign(&filename, 0xA0); // find existing file or create a new one
Mmc_Fat_Rewrite(); // To clear file and start with new data
for(loop = 1; loop <= 44; loop++) {
file_contents[0] = loop / 10 + 48;
file_contents[1] = loop % 10 + 48;
Mmc_Fat_Write(file_contents, 42); // write data to the assigned file
}
}
}//~
//M-M-M--------- Opens an existing file and rewrites it
void M_Open_File_Rewrite() {
filename[7] = 'C';
Mmc_Fat_Assign(&filename, 0);
Mmc_Fat_Rewrite();
for(loop = 1; loop <= 55; loop++) {
file_contents[0] = loop / 10 + 64;
file_contents[1] = loop % 10 + 64;
Mmc_Fat_Write(file_contents, 42); // write data to the assigned file
}
}//~
//M-M-M--------- Opens an existing file and appends data to it
// (and alters the date/time stamp)
void M_Open_File_Append() {
filename[7] = 'B';
Mmc_Fat_Assign(&filename, 0);
Mmc_Fat_Set_File_Date(2005,6,21,10,35,0);
Mmc_Fat_Append(); // Prepare file for append
Mmc_Fat_Write(" for mikroElektronika 2005\n", 27); // Write data to assigned file
}//~
//M-M-M--------- Opens an existing file, reads data from it and puts it to USART
void M_Open_File_Read() {
filename[7] = 'B';
Mmc_Fat_Assign(&filename, 0);
Mmc_Fat_Reset(&size); // To read file, procedure returns size of file
for (i = 1; i <= size; i++) {
Mmc_Fat_Read(&caracter);
Uart1_Write_Char(caracter); // Write data to USART
}
}//~
//M-M-M--------- Deletes a file. If file doesn't exist, it will first be created
// and then deleted.
void M_Delete_File() {
filename[7] = 'F';
Mmc_Fat_Assign(filename, 0);
Mmc_Fat_Delete();
}//~
//M-M-M--------- Tests whether file exists, and if so sends its creation date
// and file size via USART
void M_Test_File_Exist(char fLetter) {
unsigned long fsize;
unsigned int year;
unsigned short month, day, hour, minute;
unsigned char outstr[12];
filename[7] = fLetter;
if (Mmc_Fat_Assign(filename, 0)) {
//--- file has been found - get its date
Mmc_Fat_Get_File_Date(&year, &month, &day, &hour, &minute);
WordToStr(year, outstr);
I_Write_Str(outstr);
ByteToStr(month, outstr);
I_Write_Str(outstr);
WordToStr(day, outstr);
I_Write_Str(outstr);
WordToStr(hour, outstr);
I_Write_Str(outstr);
WordToStr(minute, outstr);
I_Write_Str(outstr);
//--- get file size
fsize = Mmc_Fat_Get_File_Size();
LongToStr((signed long)fsize, outstr);
I_Write_Str(outstr);
}
else {
//--- file was not found - signal it
Uart1_Write_Char(0x55);
Delay_ms(1000);
Uart1_Write_Char(0x55);
}
}//~
//-------------- Tries to create a swap file, whose size will be at least 100
// sectors (see Help for details)
void M_Create_Swap_File() {
unsigned int i;
for(i=0; i<512; i++)
Buffer[i] = i;
size = Mmc_Fat_Get_Swap_File(5000, "mikroE.txt", 0x20); // see help on this function for details
if (size) {
LongToStr((signed long)size, fat_txt);
I_Write_Str(fat_txt);
for(i=0; i<5000; i++) {
Mmc_Write_Sector(size++, Buffer);
Uart1_Write_Char('.');
}
}
}//~
//-------------- Main. Uncomment the function(s) to test the desired operation(s)
void main() {
//--- prepare PORTD for signalling
PORTD = 0;
TRISD = 0;
AD1PCFGH = 0xFFFF; //ADC off
AD1PCFGL = 0xFFFF ;
AD2PCFGL = 0xFFFF ;
CLKDIV=0b0111000000000000; //set PLL so a 10MHz clock is 80MHz
PLLFBD=0b0000000000011110;
OSCCON=0b0011001110000000;
//--- set up USART for the file read
Spi2_Init_Advanced(_SPI_MASTER, _SPI_8_BIT, _SPI_PRESCALE_SEC_1, _SPI_PRESCALE_PRI_64,
_SPI_SS_DISABLE, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_HIGH, _SPI_ACTIVE_2_IDLE);
Uart_Init(19200);
Uart_Write_Char('s'); // wait for UART module to stabilize
//--- init the FAT library
if (!Mmc_Fat_Init(&PORTG,9)) {
// reinitialize spi at higher speed
Spi2_Init_Advanced(_SPI_MASTER, _SPI_8_BIT, _SPI_PRESCALE_SEC_1, _SPI_PRESCALE_PRI_4,
_SPI_SS_DISABLE, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_HIGH, _SPI_ACTIVE_2_IDLE);
//--- Test start
PORTD = 0x0005;
//--- Test routines. Uncomment them one-by-one to test certain features
M_Create_New_File();
M_Create_Multiple_Files();
M_Open_File_Rewrite();
M_Open_File_Append();
M_Delete_File();
M_Create_Swap_File();
M_Open_File_Read();
M_Test_File_Exist('F'); // this file will not exist here
M_Test_File_Exist('B'); // this file will exist here
}
else {
I_Write_Str(fat_txt);
}
//--- Test termination
PORTD = 0xFFFF;
}//~!
