I'm trying to use the RedBearLab BLE shield with the RePaper e-ink dev kit from adafruit. So far they aren't playing nicely together. I'm using an Arduino Mega. The BLE shield says pins 50-53 (50 (MISO), 51 (MOSI), 52 (SCK), and 53 (SS)) are 'unavailable'. I got that information here http://redbearlab.com/bleshield/
However, this post https://redbearlab.zendesk.com/entries/22420923-Which-Arduino-pins-are-used-
makes it seem like another SPI device can be used. They also claim that the BLE shield doesn't use SS (slave select). The repaper kit also uses pins 50, 51, and 52, but not 53 (slave select). I found that information here http://learn.adafruit.com/repaper-eink-development-board/wiring-the-mega
I'm not sure how I can use these two SPI devices together if neither of them use a slave select. Is there a way to use these two devices together? Can repaper or the BLE shield use SS? Thanks!