Define The Interface For Uploading Files - Geeetech ESP8266 Instruction

Description Change password, including ordinary user and administrator.
eg. pab
Return Succ

2.5 Define the Interface for Uploading Files

 Upload files to the TF card built in the 3D printer.
The format of data package:
Format M210 SD0 file name; file offset; file length; binary file data; check digit\n
M210 is a gcodeinstrution；the following parameters are similar to the
Description
The file content could be gcode, UI images, bin files, txt files for config., etc.
Check CRC16
Return Success or fail
eg.
ushort crc16( byte[] d, intlen)
ushortcrc =
inti, j;
crc<<= 1;
crc ^= 0x1021 ;
crc = (ushort)~crc;
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.
Any changes or modifications not expressly approved by the party responsible for
compliance
could void the user's authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
function fwrite in the programming language C；\n is the terminator.
{
byte b = 0 ;
0xff00 ;
for (i = 0 ; i<len; i ++ )
{
for (j = 0 ; j < 8 ; j ++ )
{
b = (byte)(((d[i] << j) & 0x80) ^ ((crc& 0x8000) >> 8));
if (b != 0 )
}
}
return crc;
}
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