MATLAB: How to convert the output of a Serial Receive block to char data type, and find the double equivalent of this on the Arduino

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How can I convert the output of a Serial Receive block to char data type, and find the double equivalent of this on my Arduino?

Best Answer

The Serial Receive block outputs uint8 data type. One approach is to feed the output of the Serial Receive block into a MATLAB Function block to do this conversion using the 'char' and 'str2double' functions since they are both supported for Code Generation.

For example, get u = 52 as uint 8, char(u) = 4, str2double(char(u)) = 4.

Note that the similar function 'str2num' is not supported for Code Generation.

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MATLAB: How to read the output of the COMP block for a TI C2000 processor

According to the documentation, which you can find on the following page:

https://www.mathworks.com/help/releases/R2019a/supportpkg/texasinstrumentsc2000/ref/c2802xc2803xc2806xf28m3xanalogioinput.html

this block should be used to configure the pin, the sample time, and the data type for analog input. Thus, in the current configuration, Simulink tries to configure the pin 'CPIO1' to receive input from an external source. However, this pin is already assigned to the output of COMP, and thus it gives an error.

The block that can be used in this scenario is the Memory Copy block:

https://www.mathworks.com/help/releases/R2019a/supportpkg/nucleo/ref/memorycopy.html

which you can find in the Simulink Library Explorer under 'Embedded Coder Support Package for Texas Instruments C2000 Processors > Memory Operations'. In this case, you should configure the block as in the attached image (block_config.PNG). Thus, the settings you should change are the following:

'Source > Copy from:' set to 'Specified source code symbol'
'Source code symbol' set to '&GpioDataRegs.GPADAT.all'
'Data type:' set to the desired type, such as boolean or uint32

This block will provide the register containing the GPIO pin states. You can then extract the required GPIO from the output.

You can find an example application of this block, by running the following command in the MATLAB Command Window:

>> c28035pmsmfocdual

The Memory Copy block can be found inside 'Hall Sensor B': the block is called 'ECap1Regs.TSCTR'.

MATLAB: How to parse XML data sent via UDP in a Simulink Desktop Real-Time application

Please use a Stream Input block from the Simulink Desktop Real-Time library with the following settings

Block output data types:  '6*double'
Format string: '<Rob Type=\"KUKA\"><RIst X=\"%f\" Y=\"%f\" Z=\"%f\" A=\"%f\" B=\"%f\" C=\"%f\"/>'
Message termination: '</Rob>'

This is because we are reading 6 double values X, Y, Z, A, B, C, that are placed at the positions marked by %f placeholders.

Please also note the escaped double quotes (preceded by backslash).

Best Answer

Related Solutions

MATLAB: How to read the output of the COMP block for a TI C2000 processor

MATLAB: How to parse XML data sent via UDP in a Simulink Desktop Real-Time application

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