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0x30 – Digital I/O Read/Write
Length:
4 or 5 Bytes
Parameters: 2 or 3 Bytes:
1. Port Selection – Select the desired MSP430FR5739 port pin (refer to the port list on
the previous page)
2. Port Direction: 1=Input; 0=Output
3. Port Value if Byte 2 specifies Output
Returns:
Function:
Example:
2 Bytes for Input=Value on port pin; command echo acknowledgement=0x30
1 byte for Output=command echo acknowledgement=0x30
This function will read from or write to the selected port pin
0x04, 0x30, 0x60, 0x00, 0x01 – Sets Port 6 Pin 0 high
0x40 – A/D Conversion
Length:
3 Bytes
Parameters: Mode: 0=Single conversion, 1=Continuous conversions (~1 per second)
Note: Setting the ADC mode to continuous (1) starts an infinite loop. The ADC
will perform a conversion approximately twice a second and report the result to
the host. To exit, stop the code execution using the debugger, or reset the
module by unplugging the USB cable and then reconnecting it.
Returns:
Function:
Example:
2 Bytes: The 10-bit voltage data; MSB first
This function will enable A/D conversion on the selected channel and ADC, pause
10uS, perform the A/D conversion and then return 2 bytes to the host (MSB first).
Command 0x42 must have been previously called to configure the desired analog
channel as an A/D input, and 0x43 / 0x44 must have been called to configure the
voltage reference.
0x3, 0x40 0x00 – Performs the A/D conversion and, using ADC0, returns 2 bytes of
data followed by an echo of the command byte sent.
0x41 – Disable A/D
Length:
Parameters:
Returns:
Function:
Example:
2 Bytes
None
1 Byte: command echo acknowledgement=0x41
This function disables the A/D converter
0x2, 0x41 – Disables A/D Converter
Rev. 1.1 (November 2011)
6
? DLP Design, Inc.
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