Added a GPIO to power on/off for external I2C sensor(s) (with LEDs)

Dependencies:   UniGraphic mbed vt100

18-Jun-2018 外部センサの電源オン・オフ機能は下位互換の為に無効になっていました。 この版で再度有効にしました。

Revision:
0:846e2321c637
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/af_utils/af_mgr.cpp	Fri Apr 13 04:19:23 2018 +0000
@@ -0,0 +1,46 @@
+#include "mbed.h"
+#include "string.h"
+#include "vt100.h"
+#include "edge_time.h"
+#include "edge_pin.h"
+#include "edge_reset_mgr.h"
+#include "afLib.h"
+#include "pending.h"
+#include "msg_types.h"
+#include "mbedSPI.h"
+#include "af_mgr.h"
+
+afLib           *afero = 0 ;
+pending_class   *pending = 0 ;
+InterruptIn     *afero_int = 0 ;
+mbedSPI         *afero_spi = 0 ;
+DigitalOut      *afero_reset ;
+bool            gLinked = false ;
+bool            gConnected = false ;
+
+void afero_isr(void)
+{
+    afero->mcuISR() ;
+}
+
+void init_aflib(void)
+{
+    afero_reset = new DigitalOut(PIN_ASR_RESET, 1) ; /* create as deasserted */
+    afero_spi = new mbedSPI(PIN_MOSI, PIN_MISO, PIN_SCK, PIN_CS) ;
+
+reset_watch_dog() ;
+    afero = new afLib(
+        PIN_INTR,
+        afero_isr,
+        attributeChangeRequest,
+        attributeUpdatedReport,
+        afero_spi ) ;
+reset_watch_dog() ;
+    wait(0.1) ;
+    *afero_reset = 0 ;
+    wait(0.5) ; /* required 250ms ~ time for reset */
+    *afero_reset = 1 ; 
+reset_watch_dog() ;      
+    wait(0.5) ;
+reset_watch_dog() ;
+}
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