MicroTouch Micro Touch Capacitive Controller MT3000, Reference Manual, Page: 43 / 64

Chapter 2 Communicating with the MT3000 Controller 43
Format Raw
Syntax:
<SOH> FR <CR>
Description:
Returns the signal level (amount of touch) of each of the four touchscreen
corners in digital format. The returned values are not corrected for offset
and stray values. However, you can obtain the offset and stray values using
the Get Parameter Block command. For more information, refer to the
description of the Get Parameter Block command later in this chapter.
The Format Raw data is a 7-byte packet that includes 1 status byte and 6
bytes of binary corner data. The data format for the packet is fixed in order
to provide the most efficient transfer of data. The first byte of each packet
always has its high bit (Bit 7) set to provide synchronization with the host
system. Each corner value is 10 bits, which are delivered in 2 bytes, and has
a range of 0 to 1023.
To use the Format Raw command, the controller and host system must be in
an 8-bit data communication mode. The Format Raw command returns a
negative response if the controller is not using an 8-bit communication
mode.
To terminate Format Raw, issue a Reset command. The controller may
return several bytes of data between the time you issue a Reset command
and the controller receives it. You can either scan the data stream for the
Reset acknowledgment, or you can ignore the response to the first Reset
command and then issue a second Reset after approximately 10 seconds has
passed.
Use the Format Raw command for diagnostics. Use Format Tablet for
standard touchscreen operation.