ex ELLA / SWSPI

Software SPI allows non-standard SPI pins to be used for interfacing with SPI devices

Fork of SWSPI by Dave Van Wagner

Files at this revision

API Documentation at this revision

Revision 1:9e0c0217646d, committed 2015-05-08

Comitter:
lionello
Date:
Fri May 08 08:05:29 2015 +0000
Parent:
0:6a500a08c7fd
Child:
2:eafe3ec5fbf8
Commit message:
Made miso pin optional (accept NC)

Changed in this revision

SWSPI.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/SWSPI.cpp	Tue Feb 04 06:54:01 2014 +0000
+++ b/SWSPI.cpp	Fri May 08 08:05:29 2015 +0000
@@ -23,10 +23,11 @@
 #include <mbed.h>
 #include "SWSPI.h"
 
-SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin)
+SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin) : miso(NULL)
 {
     mosi = new DigitalOut(mosi_pin);
-    miso = new DigitalIn(miso_pin);
+    if (miso_pin!= NC)
+        miso = new DigitalIn(miso_pin);
     sclk = new DigitalOut(sclk_pin);
     format(8);
     frequency();
@@ -62,7 +63,7 @@
 
         if (phase == 0)
         {
-            if (miso->read())
+            if (miso && miso->read())
                 read |= (1 << bit);
         }
 
@@ -72,7 +73,7 @@
 
         if (phase == 1)
         {
-            if (miso->read())
+            if (miso && miso->read())
                 read |= (1 << bit);
         }