topic Can't pass float variables between A5 and M4 core using MCC in Vybrid Processors

Can't pass float variables between A5 and M4 core using MCC

swapnilv — Tue, 04 Aug 2015 15:08:31 GMT

Hi,

I have MQX 4.0.1 installed on my pc.

I tried to flash the sample pingpong example given for MCC demo for twrvf65gs10 tower board on Vybrid evaluation kit.

I am able to see the desired output on terminal.

But when I try to pass float variable value between A5 and M4 core; those values are not getting passed.

Even simple printf is not showing the float variable value.

I tried to declare simple float variable in main_task in file mcc.c and print the variable value on terminal as explained below:

float myTemp = 50.00;

printf("Test flt Variable: %f \n",myTemp);

But the float variable values are not shown on terminal window.

Output of print command is as shown below on terminal window:

Test flt Variable: f

Expected output is:

Test flt Variable: 50.000000;

Kindly look into it and let me know the solution.

Thanks & Regards,

Swapnil

swapnilv — Thu, 06 Aug 2015 05:21:02 GMT

Hi,

Any updates/inputs regarding above mentioned issue ?

Because a simple printf() is also not working for float variables.

Regards,

Swapnil

swapnilv — Thu, 06 Aug 2015 13:34:38 GMT

Hi,

Below flag was set to 0 in twrvf65gs10_a5 project "user_config.h" file.

#define MQX_INCLUDE_FLOATING_POINT_IO 0

I changed it to 1 and now I can see the float values correctly.

Swapnil