Free RTOS - Build Error with FPU

[bdesantis]

Posted on September 26, 2014 at 14:30

Hey guys, I just got my Keil MDK license and using the STM32CubeF4, tried creating a shell project with FreeRTOS selected. Looked good until I tried to build when I see the following error:

error:  #35: #error directive: This port can only be used when the project options are configured to enable hardware floating point support.What does this mean? I don't have any options in Project > Options > Target for the FPU to turn on or off the FPU which almost makes me think the device selected is not right, however, I selected the STM32F427ZI device which has the FPU....Did I miss something obvious?

[Tesla DeLorean]

Posted on September 26, 2014 at 18:17

Did I miss something obvious?

Hard to say, works here.... uV4.7?

[bdesantis]

Posted on September 26, 2014 at 18:45

Odd that I don't see that.....not really sure what I am doing wrong.....

The processor is the same however I am using version 5.12.....Everything else looks ok right?

[bdesantis]

Posted on September 26, 2014 at 19:28

Ok, problem solved....In the project options within the Keil tool suite, the first tab (Device) has a pull down menu item that shows:

• Software Packs
• Legacy Device Database (no RTE) 

Default was Legacy Device Database and not software packs. Not sure what the LDD is, however, when I selected Software Packs and applied the changes, I now see, the FPU option in the Target tab.....Thank you for the help....