INFICON STM-2 USB Thin Film Rate/Thickness Monitor - Manual (Page 75)

5 - 7
PN
07
4-
61
3-
P1
A
STM-2 Operating Manual
5.2.2.1 Optional Serial Command Format
<STX><ADDR><CMD_RSP>[<DATA>...]<SRLNO><ACKSM1><ACKSM2><CR>
SRLNO. . . . . . . . . . . . . . . . . . . . . . . Serial Number
Associates a command from the master with
the correct response. The value must be
greater than or equal to 0x10 (16) in order to
not be mistaken as a framing or escape
character byte.
ACKSM1, 2 . . . . . . . . . . . . . . . . . . . Alternate 0x40 based checksum characters
This has a range of values from @ (0x40)
through the letter, O (0x4f).
NOTE: Refer to section 5.2.1 on page 5-1 for additional information identifying the
bytes in this command string.
5.2.2.2 Additional Option to Serial Command
Opcode 0x10 BOOT_API is a reserved SMDP opcode. This divides the
communication response of STM-2 into two sections, bootloader and application.
A platform that is in the bootloader operational mode will only respond to
BOOT_API opcode commands, and will ignore all others making the instrument
invisible to standard communications interrogations.
Opcode 0x10 BOOT_API hides platforms waiting in bootloader mode from general
network polls and interrogations. Special bootloader aware host code must use the
BOOT_API hooks to open the platform and make it suitable for erasing and
downloading new applications code, scanning for existing applications, and
launching existing applications.