Provisioning raspbery pi sdcard
If you're previsioning your raspberry pi SD cards then you would probably be best using something like packer to build the actual image (you can use ansible as the provisioner for packer if you are really keen) then once you have your pi image, burn it onto the SD card.

If you need to make subsequent configuration changes them that would be where ansible fits most neatly in managing the ongoing configuration of the pi's