外部flash读写

你按照你外部Flash的操作时序写和读就行了。

参考TI的SDK中的例子file_download

//-------------------------------------------------从网页下载数据写入SPI_Flash中---------------------------------------------------
// Open file to save the downloaded file
lRetVal = sl_FsOpen((_u8 *)FILE_NAME, FS_MODE_OPEN_WRITE, &Token, &fileHandle);
if(lRetVal < 0)
{
// File Doesn't exit create a new of 40 KB file
lRetVal = sl_FsOpen((unsigned char *)FILE_NAME, FS_MODE_OPEN_CREATE(SIZE_40K, _FS_FILE_OPEN_FLAG_COMMIT|_FS_FILE_PUBLIC_WRITE), &Token, &fileHandle);
ASSERT_ON_ERROR(lRetVal);
}
while(1)
{
len = HTTPCli_readResponseBody(cli, (char *)g_buff, sizeof(g_buff) - 1, &moreFlag);
if(len < 0)
{
// Close file without saving
lRetVal = sl_FsClose(fileHandle, 0, (unsigned char*) "A", 1);
return lRetVal;
}

lRetVal = sl_FsWrite(fileHandle, bytesReceived,(unsigned char *)g_buff, len);

if(lRetVal < len)
{
UART_PRINT("Failed during writing the file, Error-code: %d\r\n", \
FILE_WRITE_ERROR);
// Close file without saving
lRetVal = sl_FsClose(fileHandle, 0, (unsigned char*) "A", 1);
return lRetVal;
}
bytesReceived +=len; //偏移地址增加

if ((len - 2) >= 0 && g_buff[len - 2] == '\r' && g_buff [len - 1] == '\n')
{
break;
}

if(!moreFlag)
{
break;
}
}
//
// If user file has checksum which can be used to verify the temporary
// file then file should be verified
// In case of invalid file (FILE_NAME) should be closed without saving to
// recover the previous version of file
//

// Save and close file
UART_PRINT("Total bytes received: %d\n\r", bytesReceived);
lRetVal = sl_FsClose(fileHandle, 0, 0, 0);
ASSERT_ON_ERROR(lRetVal);
//--------------------------------------------------------------------------------------------------------------------------------------------

谢谢。

这个外部flash是通过spi读写数据的吗？

我的程序里有用到spi干别的事，会影响吗？为什么一到写的时候就运行不下去了

    lRetVal = sl_FsOpen((unsigned char *)USER_FILE_NAME,
                FS_MODE_OPEN_CREATE(SIZE_40K, \
                          _FS_FILE_OPEN_FLAG_COMMIT|_FS_FILE_PUBLIC_WRITE),
                        ulToken,
                        lFileHandle);

到这一句就死了

你在操作fsopen之前，需要调用sl_Start的，请问你调用了吗？也就是说你要把WIFI先enable起来才可以。

谢谢回复。我用的是多个task，加上了sl_start()就成功了。