From 848dd3931343ab5247be499b20c20f4c9fd3bfeb Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@bug.st>
Date: Sun, 7 Sep 2014 14:19:44 +0200
Subject: [PATCH] [sam] SPI library: added SPI_HAS_EXTENDED_CS_PIN_HANDLING
 flag

This allows to check if SPI provides extended API to allow automatic
CS pin handling.
---
 hardware/arduino/sam/libraries/SPI/SPI.h | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/hardware/arduino/sam/libraries/SPI/SPI.h b/hardware/arduino/sam/libraries/SPI/SPI.h
index 58162b327..34d82397b 100644
--- a/hardware/arduino/sam/libraries/SPI/SPI.h
+++ b/hardware/arduino/sam/libraries/SPI/SPI.h
@@ -15,10 +15,24 @@
 #include "variant.h"
 #include <stdio.h>
 
-// SPI_HAS_TRANSACTION means SPI has beginTransaction(), endTransaction(),
-// usingInterrupt(), and SPISetting(clock, bitOrder, dataMode)
+// SPI_HAS_TRANSACTION means SPI has
+//   - beginTransaction()
+//   - endTransaction()
+//   - usingInterrupt()
+//   - SPISetting(clock, bitOrder, dataMode)
 #define SPI_HAS_TRANSACTION 1
 
+// SPI_HAS_EXTENDED_CS_PIN_HANDLING means SPI has automatic 
+// CS pin handling and provides the following methods:
+//   - begin(pin)
+//   - end(pin)
+//   - setBitOrder(pin, bitorder)
+//   - setDataMode(pin, datamode)
+//   - setClockDivider(pin, clockdiv)
+//   - transfer(pin, data, SPI_LAST/SPI_CONTINUE)
+//   - beginTransaction(pin, SPISettings settings) (if transactions are available)
+#define SPI_HAS_EXTENDED_CS_PIN_HANDLING 1
+
 #define SPI_MODE0 0x02
 #define SPI_MODE1 0x00
 #define SPI_MODE2 0x03