Kata

There is a spaceship waiting on launchpad. In order to fuel it you are assigned to do some work.

Your task is to compose simple packet for a protocol.
In other words you should populate a byte array with data in order determined by a specification.

Fields:

Start flag	ID number	State	Scenario mask	Volume	Status	End flag	CRC
1 byte	4 bytes	2 bytes	12 bytes	6 bytes	4 bytes	1 byte	1 byte
HEX	HEX ASCII	HEX ASCII	HEX ASCII	DEC ASCII	HEX ASCII	HEX	HEX
0x2	"0000"..."FFFF"	"00"..."7F"	"000000000000"..."FFFFFFFFFFFF"	"000000"..."999999"	"00FF"..."FFFF"	0x3	0..FF

Flag fields used to identify start and end of message are constant:
Start flag = 0x2
End flag = 0x3

Function return value is:
Success : 1
Failure : -1
Function should return failure (-1) if data was out of range specified in table.
If function returns failure (-1) no data should be written to the passed pointer.

Note:
CRC is calculated only considering data between Start and End flags.
To calculate CRC you should use provided function (already implemented):

unsigned char crc8(const unsigned char *pc_block, unsigned int len);
/* 
const unsigned char *pc_block - const pointer at the beginning of array crc is calculated for.
unsigned int len - amount of bytes to calculate crc for, starting from pc_block pointer.
*/