Diff: MbedPerAccess.cpp

Revision:

0:7ce46d3f9f5d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MbedPerAccess.cpp	Fri Aug 08 02:27:42 2014 +0000
@@ -0,0 +1,108 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ * 
+ */
+ 
+/**
+*   \brief          Implements the mbed perephiral access interface
+*   \author         Navin Bhaskar
+*/
+
+/**
+ * Implements the peripheral access functionalities
+ */
+
+#include "MbedPerAccess.h"
+#include "error.h"
+#include "mbed.h"
+
+/**
+ * Outputs the given logic level at the given pin
+ */
+
+uint MbedPerAccess::digitalOut(uint pinNo, uint val)
+{
+    DigitalOut ports[] = {
+                         D0,  D1,  D2,  D3,  D4,  D5,  D6,  D7,  D8,  D9,  D10,  D11,  D12,  D13,  D14,  D15,
+                         A0,  A1,  A2,  A3,  A4, A5, LED_RED, LED_GREEN, LED_BLUE
+                         };
+    if (pinNo > _maxDigiOutPins) {
+
+        return ERR_INVALID_PIN;
+    }
+    if (val == 0) {
+        ports[pinNo] = 0;
+    } else {
+        ports[pinNo] = 1;
+    }
+    return ERR_SUCCESS;
+}
+
+/**
+ * Reads the voltage level at given pin and returns
+ * it's logical value.
+ */
+
+uint MbedPerAccess::digitalIn(uint pinNo, uint * val)
+{
+    DigitalIn ports[] = {
+                         D0,  D1,  D2,  D3,  D4,  D5,  D6,  D7,  D8,  D9,  D10,  D11,  D12,  D13,  D14,  D15,
+                         A0,  A1,  A2,  A3,  A4, A5
+                        };
+    if (pinNo > _maxDigiInPins) {
+        return ERR_INVALID_PIN;
+    }
+
+
+    *val = ports[pinNo];
+    return ERR_SUCCESS;
+}
+
+/**
+ * Outputs the analog value.
+ */
+
+uint MbedPerAccess::analogOut(uint pinNo, uint val)
+{
+    AnalogOut aout(DAC0_OUT);
+    if (val > _maxAnOutVal) {
+        return ERR_INVALID_ARG;
+    }
+    /* Only one analog out */
+    if (pinNo != 0) {
+        return ERR_INVALID_PIN;
+    }
+    aout = val/100.0;
+    return ERR_SUCCESS;
+}
+
+/**
+ * Reads the volatge at the given analog input pin
+ * and returns the digital representation of the same
+ */
+
+uint MbedPerAccess::analogIn(uint pinNo, uint * outVal)
+{
+    float val;
+    AnalogIn ana_in[] = { A0,  A1,  A2,  A3,  A4, A5 };
+    if (pinNo > _maxAnInPins) {
+        return ERR_INVALID_PIN;
+    }
+
+    val = ana_in[pinNo];
+    *outVal = (int)(val*100);
+    return ERR_SUCCESS;
+}