Minor fixes to work with the Nordic RF51

Dependencies:   FATFileSystem

Fork of SDFileSystem by mbed official

Revision:
4:c0b11a180d6f
Parent:
3:7b35d1709458
--- a/SDFileSystem.cpp	Mon Mar 17 14:34:01 2014 +0000
+++ b/SDFileSystem.cpp	Tue Jul 26 21:16:22 2016 +0000
@@ -141,7 +141,7 @@
 
 int SDFileSystem::initialise_card() {
     // Set to 100kHz for initialisation, and clock card with cs = 1
-    _spi.frequency(100000);
+    _spi.frequency(400000);
     _cs = 1;
     for (int i = 0; i < 16; i++) {
         _spi.write(0xFF);