Hello,
I am using example code of energia Pfatfs library named "PFatFsfileTest". This program reads "T_READ.txt" file from sd card properly.
But It can't write string "Hello world" 10 times to the file "T_WRITE.txt" into sd card. Instead, it just writes only "H".
I am posting the original code of file below:
/*----------------------------------------------------------------------*/
/* Petit FatFs sample project for generic uC (C)ChaN, 2010 */
/*----------------------------------------------------------------------*/
/* ported to Energia */
/* copy the two files t_read.txt and t_write.txt from the example folder in the root of the sd card*/
#include "SPI.h"
#include "pfatfs.h"
#define cs_pin 10 // chip select pin
#define read_buffer 128 // size (in bytes) of read buffer
unsigned short int bw, br;//, i;
char buffer[read_buffer];
int rc;
DIR dir; /* Directory object */
FILINFO fno; /* File information object */
void setup() {
pinMode(PUSH2, INPUT_PULLUP);
Serial.begin(9600); // initialize the serial terminal
FatFs.begin(cs_pin); // initialize FatFS library calls
}
void die ( /* Stop with dying message */
int pff_err /* FatFs return value */
)
{
Serial.println();Serial.print("Failed with rc=");Serial.print(pff_err,DEC);
for (; ;
}
/*-----------------------------------------------------------------------*/
/* Program Main */
/*-----------------------------------------------------------------------*/
void loop()
{
Serial.println();
Serial.println("Press button to start...");
while(digitalRead(PUSH2)==1){}
delay(100);
while(digitalRead(PUSH2)==0){}
Serial.println();
Serial.println("Open a test file (t_read.txt).");
delay(100);
rc = FatFs.open("T_READ.TXT");
if (rc) die(rc);
Serial.println();
Serial.println("Type the file content.");
delay(100);
for (; {
rc = FatFs.read(buffer, sizeof(buffer), &br); /* Read a chunk of file */
if (rc || !br) break; /* Error or end of file */
for (uint16_t i = 0; i < br; i++) /* Type the data */
Serial.print(buffer[i]);
delay(100);
}
if (rc) die(rc);
Serial.println();
Serial.println("Open a file to write (t_write.txt).");
delay(100);
rc = FatFs.open("T_WRITE.TXT");
if (rc) die(rc);
Serial.println();
Serial.println("Write a text data. (10 x Hello world!)");
delay(100);
bw=0;
for (uint16_t i=0;i<10;i++) {
rc = FatFs.write("Hello world!\r\n", 14, &bw);
if (rc || !bw) break;
}
if (rc) die(rc);
rc = FatFs.write(0, 0, &bw); //Finalize write
if (rc) die(rc);
delay(100);
Serial.println();
Serial.println("Verify the write process (t_write.txt).");
delay(100);
rc = FatFs.open("T_WRITE.TXT");
if (rc) die(rc);
Serial.println();
Serial.println("Type the file content.");
delay(100);
for (; {
rc = FatFs.read(buffer, sizeof(buffer), &br); /* Read a chunk of file */
if (rc || !br) break; /* Error or end of file */
for (uint16_t i = 0; i < br; i++) /* Type the data */
Serial.print(buffer[i]);
delay(100);
}
if (rc) die(rc);
Serial.println();
Serial.println("Open root directory.");
delay(100);
rc = FatFs.opendir(&dir, "");
if (rc) die(rc);
Serial.println();
Serial.println("Directory listing...");
delay(100);
for (; {
rc = FatFs.readdir(&dir, &fno); /* Read a directory item */
if (rc || !fno.fname[0]) break; /* Error or end of dir */
if (fno.fattrib & AM_DIR) {Serial.print("<dir>\t"); Serial.println(fno.fname);delay(100);}
else {Serial.print(fno.fsize);Serial.print("\t"); Serial.println(fno.fname);delay(100);}
}
if (rc) die(rc);
Serial.println();
Serial.print("Test completed.");
//for (; ;
}
and i am also posting my terminal output below:
Press button to start...
Open a test file (t_read.txt).
Type the file content.
abc
Open a file to write (t_write.txt).
Write a text data. (10 x Hello world!)
Verify the write process (t_write.txt).
Type the file content.
H
Open root directory.
Directory listing...
3 T_READ.TXT
3858759679 m
3842012416 N
1409286144 EWTEX~1T.XT
Test completed.
Press button to start...
Plz tell me the solution as soon as possible.
