Kontron MSM-LP Manual User Guide V106 - Manual (Page 28)

MSM-LP / Special Features
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4.3 System Controller USB Serial Commands
Note: "System Controller USB" function must be enabled in the BIOS setup for using the ADC and PWM functions.
MSM-LP on-board 4-channel ADC and 2-channel PWM are accessible over a USB-serial port interface.
» In the Windows Device Manager it is represented as "KCC ADC/PWM Control Serial Interface". For a driver
installation under Windows, the "KCCUSBserial.inf" file is required.
» For Linux this interface does not require any drivers and is listed in the system as the "ttyACM0" serial port.
» Communication with ADC/PWM can be organized over the standard serial asynchronous protocol.
» Every control request consists of a 4 Byte package, with the leading (synch) Byte always 0x15.
» The number of Bytes in the answer is variable and depends on the request.
4.3.1 I/O Control Requests/Answers:
4 Byte Command Parameters Description
'\x15','a','c',N
{0x15,0x61,0x63,N} N-channels mask
N=0 – stop measurement
N=0x01...0x0F define which
channels 0...3 will be
measured
Start cyclic ADC measurement when ADC measures all channels
defined in the mask field, the controller sends an answer:
'\x15','D',VS...VE {0x15,0x44,VS…VE} ,
where VS is the Byte value of the first defined channel and VE is the
Byte value of the last defined channel.
The measurement/answer will repeat until the controller receives a
stop command ('\x15','a','c',0).
The number of received Bytes defined by the channels mask.
Example: mask N=0x05, ADC will measure on Channels 0 and 2 and
send a 4 Byte answer '\x15','D',V0,V2, where V0 and V2 are results
of the measurement on the appropriate channels.
'\x15','a','s',N
{0x15,0x61,0x73,N} N-channels mask
N=0 – stop measurement
N=0x01...0x0F define which
channels 0...3 will be
measured
Start single shot ADC measurement when ADC measures all channels
defined in the mask field, the controller sends an answer:
'\x15','D',NS...NE {0x15,0x44,VS…VE}
where VS is the Byte value of the first defined channel and VE is the
Byte value of the last defined channel.
A non-cycled variant of the command above.
The number of received Bytes defined by the channels mask.
'\x15','p','a','e'
{0x15,0x70,0x61,0x65}
Enable PWM Channel A.
'\x15','p','a','d'
{0x15,0x70,0x61,0x64}
Disable PWM Channel A.
'\x15','p','b','e'
{0x15,0x70,0x62,0x65}
Enable PWM Channel B.
'\x15','p','b','d'
{0x15,0x70,0x62,0x64}
Disable PWM Channel B.
'\x15','w','a',N
{0x15,0x77,0x61,N} N – PWM value
Set PWM value on Channel A (PWM must be enabled).
'\x15','w','b',N
{0x15,0x77,0x62,N} N – PWM value
Set PWM value on Channel B (PWM must be enabled).
'\x15','f','v','r'
{0x15,0x66,0x76,0x72} Get firmware version.
Answer: '\x15','V','M','S','M','L','P','_','0','6',0
The answer is always 11 Bytes, '\x15','V' - answer prefix, 8 Bytes of
the firmware version and a final Byte 0.